20020117 Bare Overhead Trans

Bare Overhead Transmission Conductor Ratings

Transmission and Substation Design Subcommittee Conductor Rating Task Force

PJM Interconnection, LLC

November, 2000

PJM Conductor Rating Task Force:

Baltimore Gas & Electric - Robert W. Munley (Chairman) Conectiv - Frank T. Sobonya GPU Energy - Charles K. Kulik PECO Energy - Harry E. Hackman Potomac Electric Power - Chih C. Chow PPL Electric Utilities - Alan L. Tope Public Service Electric & Gas - Sankar P. Basu

2

Executive Summary

This report is an update of earlier PJM work that established the method and philosophy for the rating of bare overhead transmission conductors commonly used on the PJM transmission system. The earlier work culminated in the publication of two reports: Determination of Thermal Ratings for Bare Overhead Conductors, January 1973; and Ambient Adjusted Thermal Ratings for Bare Overhead Conductors, May 1980. In order to update these documents, a task force was formed with representation from each PJM transmission owner company. The major emphasis of this update was to utilize the presently accepted IEEE Standard 738-1993 for the calculation of conductor ratings, and address any additional issues such as emergency ratings, changes in weather etc. The task force evaluated the original weather data that was collected for use in preparation of the 1973 report as well as discussed this work with Mr. Glenn Davidson, the chairman of the task force at the time. The result of this evaluation was that the original weather data are still applicable today. Concerns remain about the importance and the calculation of a realistic measure of conductor loss of strength due to the annealing of the aluminum conductors at high temperatures. Work subsequent to the 1973 PJM report has shown the PJM calculated values for conductor loss of strength to be very conservative. This task force recommends the use of newer calculation models to re-evaluate the maximum conductor operating temperature that are restricted by a 10% loss of strength. Future work is proposed to develop an automated method of computing the maximum conductor operating temperature limited by a 10% loss of strength. Another major accomplishment in the attached report is the inclusion of the older PJM work in the appendix. It was agreed that much of this information is being forgotten and lost as these reports age, the authors retire, and the utility industry re-organizes. By including this work we intend to keep much of this knowledge together in a coherent package. Included with this report is a diskette that contains a Microsoft Excel 97 spreadsheet called RATE.XLS. This software utilizes the IEEE 738 calculation method with PJM recommended input parameters. The ratings that result from this calculation method vary by +/- 3% from the previously published PJM ambient adjusted ratings. This was felt to be a relatively insignificant deviation in exchange for the adoption of an industry standard method of calculation. The task force investigated the possibility of expanded short duration ratings for emergency operation. After review it was decided to retain the existing philosophy where normal ratings apply for all “normal” configuration and loading conditions. Emergency ratings are to apply for all loadings due to contingency conditions and the ratings are to apply for durations not to exceed 24 hours. Shorter duration emergency ratings were investigated and it was decided that the increased risk of overheating the conductor and sagging the wire below NESC minimum clearances was not acceptable.

3

Table of Contents

Section Page Executive Summary 2

Table of Contents 3 1.0 Introduction 5 2.0 Definitions and Terms 6 3.0 Non-Thermal Rating Limitations 7 4.0 Weather 8

4.1 Weather Model 8 4.2 Definition of Summer and Winter 9

5.0 Maximum Conductor Temperature 10 6.0 Loss of Strength in Overhead Conductors 11 7.0 Fittings, Accessories, and Hardware 13 8.0 Risk 14

8.1 Emergency Rating 16

9.0 Assumptions for Calculations 17 9.1 Normal Conditions 17 9.2 Emergency Conditions 18 9.3 Discussion of Assumptions 19 10.0 IEEE Standard 738-1993 21 11.0 IEEE/PJM Method Comparison 22 12.0 Appendices Appendix 1 Frequency distrib. of wind and ambient temperature conditions 26 Table 12-1 Summer Composite PJM Weather Data 27

Table 12-2 Winter Composite PJM Weather Data 28 Figure 12-3 PJM Load Cycle 29

4

Appendix 2 – Example of Loss of Strength Calculation 30 Appendix 3 - Determination of Bare Overhead Conductor Ratings (Jan 1973) 34 Appendix 4 - Ambient Adjusted Thermal Ratings for Bare

Overhead Conductors (May 1980) 110 Appendix 5 - Rating Calculation Spreadsheet Printout 149 Appendix 6 - EXCEL Spreadsheet Output for Common PJM Conductors 158 Appendix 7 - Conductors Calculation Program File (EXCEL Spreadsheet) 174 13.0 References

13.1 T72 189-4 “Effect of Elevated Temperature on the Strength of Aluminum Conductors” by J. R. Harvey

13.2 IEEE Paper C72 188-6 “Effect of Elevated Temperature on the

Performance of Conductor Accessories” by W. B. Howett and T. E. Simpkins

13.3 Southwire “Overhead Conductor Manual,”1994 13.4 IEEE Std. 738-1993 “IEEE Standard for Calculating the Current -

Temperature Relationship of Bare Overhead Conductors" 13.5 PJM Circuit Rating Review, C&TPS Report to P&E Committee,

May 1986

5

1.0 Introduction

The PJM Transmission and Substation Design Subcommittee (TSDS) was requested to update and revise appropriate PJM Engineering and Planning documents in the late 1990’s coincident with the move to a deregulated electric supply industry. Since the conductor rating documents utilized by PJM dated from the 1970’s and 80’s, these were included in the revision process. In late 1998 a tentative project scope was developed for this work and it was subsequently approved by the TSDS in early 1999. A Conductor Rating Task Force (CRTF) was re-created with membership from each of the 7 PJM member utility companies. The scope was to update, revise, or re-affirm the methodology used by PJM to rate overhead transmission conductors and at the same time attempt to bring these methods more into line with the industry accepted IEEE ratings methods. One of the major issues to be addressed was new software for the rating calculations. The original PJM software was written in FORTRAN and was installed on corporate mainframe computers. This software had not been updated with the move to the personal computer. Additionally there were concerns over the ability of this software to correctly operate after January 1, 2000. Through a series of task force meetings beginning in March 1999, the group developed a plan to update the rating philosophy as well as to capture for future reference much of the rating information uncovered during the review process. The results of these meetings and hours of work are incorporated here in this document. This document addresses the issues associated with the rating of bare overhead conductors. Often these ratings are the most limiting ratings on a circuit or feeder, but not always. The ratings provided in this document must not be confused with circuit ratings, they are only one component in the analysis to determine the circuit rating.

6

2.0 Definitions and Terms Continuous Duty A duty that demands operation at a substantially

constant load for an indefinitely long time. Short Time Duty A duty that demands operation at a substantially

constant load for a short and definitely specified time. Normal Conditions All equipment in normal configuration, normal ambient

weather conditions. Normal Rating The maximum permissible constant load at normal

conditions, at the maximum allowable conductor temperature for that conductor.

Emergency Conditions Equipment has been operating at Normal Rating. The

equipment is then exposed to an out of configuration condition and emergency ambient weather conditions.

Emergency Rating The maximum permissible constant load at emergency

conditions, at the maximum allowable conductor temperature. (for a period longer than 15 minutes, but not to exceed 24 hours)

Weather Conditions ambient temperature, solar and sky radiated heat flux,

wind speed, wind direction, and elevation above sea level.

Max. Allowable Condr. Temp. The maximum temperature limit that is selected in

order to minimize loss of strength, conductor sag, line losses, or a combination of the above.

Time Risk The time during which the conductor is vulnerable to

operation at temperatures greater than the design temperature.

Temperature Risk The maximum increase in conductor temperature above

design temperature which can be experienced if the conductor carries its rated current simultaneously with an occurrence of the most severe set of ambient conditions.

7

3.0 Non-thermal Rating Limitations Situations may arise where limitations other than the thermal rating of the conductor will limit the maximum rating of the circuit. Other electrical devices such as wave traps, switches, transformers, disconnects, breakers, and relays. Legal or contractual limitations will sometimes restrict operating practices to limit magnetic fields due to field concerns. On shared rights-of-way, other utilities (Amtrak, for example) may impose maximum current limits to minimize inductive interference. Interference issues should always be addressed when determining loading on a line. Potential interference or inductive coupling may cause hazards to other utilities or other lines within the right of way. At times system conditions require a limit on the maximum amount of current flowing through a line. This may require the line being taken out of service or devices added which limit the amount of current carried through the line.

8

4.0 Weather

Ambient weather conditions have a major effect on the calculation of a conductor’s thermal rating. Wind speed is the most widely varying parameter and the most important determinant of ratings. Careful selection of weather parameters for thermal rating calculations is as important as the selection of method of calculation itself and requires considerable engineering judgement. Since the publication of “Ambient Adjusted Thermal Ratings For Bare Overhead Conductors” in May 1980 and its acceptance by the PJM companies, wind speed and ambient temperature became the major determining factor related to weather for the calculation of steady state thermal ratings of conductors for daily operation. In the original PJM work, the weather data included 10 years of data from Pittsburgh (1/1/49 –12/31/58) and 16 years of data from Washington D.C. National Airport (1/1/49 – 12/31/64). These were added together and used as being the total composite hourly record of wind data for 26 years. Any differences between the two different weather data sets were obscured by combining the data.

4.1 Weather Model

Under actual operating conditions, conductors experience fluctuations in load and weather conditions. This complex relationship is not adequately represented by a set of fixed parameters. A probabilistic model, however, can utilize actual weather data and load cycle characteristics to represent the conductor’s operating history. This model produces a time distribution of conductor temperature which can be used to calculate the loss of strength that a conductor would experience. This modeling technique allows conductors to be rated to meet the constraints of maximum allowable temperature and/or allowable loss of strength. A weather model is the heart of the simulation. Weather conditions, especially wind, have a marked effect on conductor temperatures. For the PJM weather model, detailed weather data were gathered from several locations representative of the PJM area. Two of the locations had hourly recordings of weather data on magnetic tape for periods exceeding ten years. These hourly recordings were summarized in frequency distribution tables, called “wind roses” which tabulate the statistical distribution of wind speed for each five-degree range of ambient temperature. Wind roses were prepared from day and night data in order to allow the exclusion of solar heating during the night hours. Only wind velocities of five knots or less were considered in detail, since there is no significant annealing at the conductor temperatures, which result, when the wind velocity exceeds five knots. The hour-by-hour weather data used to make the wind roses was examined to determine whether prolonged periods of simultaneous still air and high temperature exist. No such prolonged periods were found; three successive hours at temperatures in excess of 25°C was the longest period recorded.

9

However, this examination of the wind roses for each of the locations revealed a higher than expected occurrence of recorded still air. The same data indicated few occurrences of one and two knot winds. The Environmental Sciences Services Administration (ESSA) was consulted for an explanation, and the wind roses were studied by their Science Advisory Group at the National Weather Records Center (NWRC.) The NWRC advised that due to bearing friction and inertia in the standard cup anemometers used by ESSA, many of these instruments will not begin to record until the wind speed exceeded two or three knots. A paper, “ Bias Introduced by Anemometer Starting Speeds in Climatological Wind Rose Summaries” discussed this problem and concluded that there is indeed a strong measurement bias but offered no solution to the problem of how to overcome this bias. The NWRC suggested that the calm hours be apportioned over the zero, one, and two knot ranges. This reapportionment was made and the resulting adjusted weather data from several locations in PJM territory were combined into a single matrix. Computations using weather data from each individual location yielded results which were essentially identical to those computations made using the combined data. Based on this computation, it was decided that a single weather model can be used. In order to complete the simulation of the operating experience of the conductor, it is necessary to determine the shape of the load cycle which the conductors will experience. A representative load cycle was prepared from studies of actual PJM line loadings. A step function approximation was made to represent this cycle. The Task Force believes that if it had to purchase new weather data, the weather data would lead to the same conclusions, based on annecdotal information. Glenn Davidson, who did much of the original work as the Chair of the 1973 PJM Conductor Rating Task Force, and who attended the May 1999 meeting of this Task Force, also shares this opinion. The Task Force thus concluded that the assumptions made in the original PJM Conductor Rating calculations still remain valid and applicable.

4.2 Definition of Summer and Winter

For planning purposes summer is defined as the nine month period extending from March through November and having an ambient temperature of 35°C. Winter is defined as the three month period extending from December through February and having an ambient temperature of 10°C. These values are very conservative as the winter wind chills are less than or equal to 10°C over 88% of the time. The actual summer temperatures are less than or equal to 35° Celsius 99% of the time. These are the values used by planners to determine the need to add transmission capacity. The system operators have tables of ambient adjusted ratings with values between -15 and 40 degrees in 5 degree increments to determine ampacities in effect at any given temperature.

10

5.0 Maximum Conductor Temperature

Three factors that govern the maximum permissible operating temperature of a transmission line are (1) the minimum allowable ground clearance, (2) the ability of the fittings to operate satisfactorily, and 3) the acceptable loss-of-strength. The National Electric Safety Code requires the minimum ground clearances be calculated using the highest conductor operating temperature, regardless of duration. Thus, the increase in sag due to the elongation of the conductor must be considered for the highest conductor operating temperature. Operation at high temperatures may affect the tensile strength of aluminum conductor. Exposure to these high temperatures may cause cumulative partial annealing which will, in time, lower the strength of aluminum conductors. The resulting loss of strength should be considered for temperatures above the 90-100°C range, as discussed in the following section.

11

6.0 Loss of Strength in Overhead Conductors

Loss of strength is one factor to be considered when determining the maximum operating temperature of a transmission line conductor. Equations developed in IEEE Paper 70-TP-81-PWR by Koval and Billinton were used in the 1973 PJM report to determine the loss of strength due to elevated conductor temperatures. The task force recommends the use of the J. R. Harvey paper (reference 13.1) as a more current and verified method to determine the conductor loss of strength. The precision of these calculations is dependent on forecasting the number of hours the conductor will be operated at temperatures greater than or equal to 100°C throughout its life. Loss of strength is cumulative throughout the life of the conductor. The guideline used in the previous PJM Rating Method “Determination of Thermal ratings for Bare Overhead Conductors-January 1973” was to choose a maximum operating temperature which would limit the loss of strength to no more than 10% of its rated breaking strength over the life of the conductor. This value of 10% loss of strength also appears in various conductor manufacturers’ literature as a design value for overhead lines. The task force recommends retaining the 10% limit on conductor loss of strength due to high temperature operation. The recommended PJM Methodology for calculating loss of strength follows:

1. Utilize Frequency of Occurrence tables developed from composite weather data collected at Pittsburgh and Washington Airports during the time period of 1/1/49 to 12/31/64. See Tables 12-1 and 12-2 of Appendix 1. These values are assumed to be applicable throughout the entire PJM system.

2. Utilize load cycle for summer and winter as shown in the PJM Load Cycle Table below. For loss of strength calculations, daylight is defined as the period extending from 7:30 am to 8:30 pm. These hours were chosen because they coincide with the normal PJM weekday load cycle in which the peaks also occur between 7:30 am and 8:30 pm.

3. Forecast the number of hours the conductor will operate at temperatures greater than or equal to 100°C for both normal and emergency conditions. Items 1 and 2 above will be used together to forecast the number of hours.

4. Determine loss of strength using equations developed in reference 13.1. An example of this method is shown in Appendix 2.

5. If the calculated loss of strength is above 10%, reduce the maximum conductor temperature to limit the loss of strength to less than 10%.

Typical values of loss of strength summarized from the 1973 report are shown in the table 16-1 below for various conductor temperatures for a 35-year conductor life. For maximum operating conductor temperatures of 125°C or less, loss of strength is not commonly a limiting factor in determining conductor ratings for most ACSR conductors. However, attention needs to be given for temperatures above 125°C for certain conductors to limit the loss of strength to no more than 10% of rated breaking strength.

12

Table 16-1

The recommended method of calculating conductor loss of strength shown in Appendix 2 results in a lower loss of strength for the same time and temperature conditions than the original method utilized in the 1973 PJM report. This is consistent with subsequent test results. Future work by this task force is proposed to develop an automated method of computing conductor loss of strength. Table 16-1 will then be revised to show the changes.

Conductor Size100 110 120 125 130 140 150 160 170 180

2493 kcm 54/37 ACAR 2.83 3.76 5.77 7.56 9.722312 kcm 76/19 ACSR 1.58 2.65 4.25 5.08 6.18 8.542300 kcm 84/19 ACSR 0.00 0.68 1.95 2.76 3.55 5.57 7.772167 kcm 72/7 ACSR 1.40 2.45 4.17 4.98 5.91 8.302156 kcm 84/19 ACSR 0.00 0.18 1.49 2.26 2.96 4.90 7.11 9.931780 kcm 84/19 ACSR 0.00 0.71 1.95 2.79 3.53 5.63 7.791590 kcm 54/19 ACSR 0.00 0.00 0.00 0.20 0.80 2.30 4.20 6.40 8.401590 kcm 45/7 ACSR 0.00 0.86 2.15 2.95 3.80 5.71 8.031272 kcm 54/19 ACSR 0.00 0.00 0.00 0.18 0.86 2.43 4.19 6.24 8.30 10.471272 kcm 45/7 ACSR 0.00 0.85 2.25 2.94 3.87 6.09 8.171033.5 kcm 54/7 ACSR 0.00 0.00 0.00 0.27 1.00 2.52 4.24 6.33 8.31 10.341033.5 kcm 45/7 ACSR 0.00 0.88 2.25 3.08 3.93 5.88 8.28795 kcm 30/19 ACSR 0.00 0.00 0.00 0.00 0.00 0.00 0.62 1.95 3.46 4.92795 kcm 26/7 ACSR 0.00 0.00 0.00 0.00 0.00 1.20 2.80 4.40 6.20 8.00634.9 kcm 12/7 ACAR 3.09 4.19 6.23 7.77 9.98556.5 kcm 24/7 ACSR 0.00 0.00 0.00 0.42 1.06 2.80 4.20 5.88 7.85 9.74477 kcm 26/7 ACSR 0.00 0.00 0.00 0.00 0.26 1.68 2.94 4.34 6.07 7.92336 kcm 26/7 ACSR 0.00 0.00 0.00 0.04 0.58 1.92 2.94 4.37 5.98 7.82336.4 kcm 18/1 ACSR 1.30 2.56 4.78 5.83 6.98 9.03300 kcm 26/7 ACSR 0.00 0.00 0.00 0.08 0.74 2.02 2.94 4.32 6.08 7.87300 kcm 19 str AAC 5.43 7.61 10.28

Assumptions: Conductor operates for 35 years to PJM Load Cycle as shown in Appendix #3, Pg A-7, Figure #3Conductor emissivity =0.7 and apsorptivity =0.9Winter Rating Conditions: Normal 20 oC, no wind / Emerg 10 oC, 1 knotSummer Rating Conditions: Normal 35 oC, no wind / Emerg 20 oC, 1 knot

Maximum Design Conductor Operating Temperature ( oC)

Conductor Loss of Strength in % Based on PJM Weather ModelFrom the 1973 PJM Report

13

7.0 Fittings/Accessories/Hardware

Fittings used on a transmission line serve both electrical and mechanical functions. Electrically, the fittings must establish and maintain low contact resistance, must not generate radio noise at the design voltage and must not exceed the temperature of the conductor. Mechanically, full tension fittings must be capable of holding 95% of the conductor’s rated strength and non-tension fittings should be capable of holding at least 10% of the rated strength of the conductor. Compression fittings properly installed with the manufacturer’s recommended practice and joint compound are capable of transferring the maximum current available regardless of the emergency conductor temperature contemplated at this time by utility engineers. Field experience indicates a need to evaluate all bolted current carrying fittings prior to high temperature (>100°C) operation.

14

8.0 Risk

As discussed previously, overhead conductor ratings are affected by many factors, but the most significant of these many parameters is wind speed. But unlike many of the other factors such as absorptivity, ambient temperature, conductor resistance, etc., wind speed is truly variable in magnitude and direction. In the early PJM work, summarized by the “Determination of Thermal Ratings for Bare Overhead Conductor, 1973”, weather data was collected from Washington DC over a period of 16 years, and from Pittsburgh over a 10 year period. These data were pooled to represent a 26-year span for an average PJM condition. The weather data were summarized on pages A18 and A19 in the 1973 Report in a table format for the frequency distribution of wind and ambient temperature conditions. The tables are reprinted in this report as Appendix 1, Tables 12-1 and 12-2. In these tables each row list the probability of occurrence of a given wind speed at a specified ambient temperature. Alternately, each row gives the probability of occurrence of different ambient temperatures given the particular wind speed. When rating transmission conductors, the choice of wind speed used is important due to the significant effect on the rating. While a higher wind speed is desired for the higher rating, there is a cost. What happens if the wind speed that actually occurs along the transmission line is less than the assumed value? As the original PJM work showed, the wind speed is characterized by a distribution of wind speeds with higher and lower values. A wind speed lower than assumed would drive a higher conductor temperature than assumed. For example, if a rating were based upon 100°C with 2 feet/sec. of wind and a lesser wind were to occur it would cause an increase in conductor temperature above 100°C. This risk of increase in conductor temperature is called temperature risk. The duration of these lower wind speeds is also of concern. The acceptability of a temperature risk changes with the duration of that risk. For example, while a temperature overrun of 25°C would not be of major concern for 5 minutes, it would be more problematic if it were for 6 hours during mid-day. The risk due to the duration of an over temperature condition is called time risk. Figure 8-1 shown below conveniently depicts these risks. On the horizontal axis are listed wind speeds, and on the vertical axis are the probabilities of wind speeds at or less than the listed values. For example wind speeds of 1 knot (1.69 ft./sec.) or less are likely 1% of the time, and this increases to 10% for 4 knots (6.76 ft./sec.) of wind.

15

Figure 8-1

This chart also details the temperature risk as the labels next to each data point. For example, with 3 knots of wind the temperature of an overhead transmission conductor would increase in temperature by up to 104oC at different combinations of ambient temperatures and lesser wind speeds. For this 3-knot condition, the temperature risk would be 104°C with the time risk equivalent to 5% of the time, or 438 hours per year. The original PJM CRTF evaluated these risks and developed a reasonable approach to manage these risks. First of all, normal ratings were to be based upon 0 knots of wind. This is a conservative approach since there is no risk that a lesser wind speed would occur. Therefore there is neither temperature nor time risk. The original PJM work determined that a conductor would operate under emergency conditions for 350 hours over its 35 year life. As a result, this approach was chosen knowing that the normal rating applies 99.9% of the time. However, the original CRTF did acknowledge the need for an increased rating for an emergency condition. In an effort to provide this capability, an emergency rating based upon 1 knot of wind was selected. This condition resulted in a 1-% risk of a lesser wind speed occurring (time risk) and this was believed to be acceptable for an emergency condition. Additionally, the temperature risk was calculated to be approximately 30°C for the commonly used PJM 230 kV Lapwing transmission conductor. While this is fairly significant, the resulting increase in conductor sag was calculated to be approximately 2 feet for a standard 230 kV span length and tension. This increase in sag was up to about 3 feet safety factor that all PJM companies added to the

Frequency of Occurrence in Relation to Windspeed

0

5

10

15

20

25

30

35

40

0 1 2 3 4 5 6

Windspeed (Knots) Frequency of Occurrence (Percent)

149 oC

75 oC

128 oC

104 oC

42 oC

Assumptions:>Wind Speed Frequencies from 1973 PJM Report>Conductor Temperatures shown are for 1,033,500 45/7 ACSR Conductor operating at varying ampacities. Each ampacity is chosen to result in a 125C conductor temperature using the IEEE 738-1993 method with PJM recomended parameters. The temperatures shown as data labels represent the conductor temperature rise above the base 125C as the assumed wind speed falls to zero.

For 5 knots, the actual data included 5 knots and above. While the total frequency for this point is correct, the exact wind speed to plot the point at is unknown. The correct plotting is somewhere above 5 knots.

16

required ground clearance requirements. Therefore the temperature risk was actually of no effect since NESC clearances were not violated. The recommendation of the 1999 CRTF regarding wind and weather assumptions for normal and emergency ratings is given in Section 9.0.

8.1 Emergency Ratings

Emergency ratings are provided for abnormal out of configuration system conditions. These ratings allow the system operators to take advantage of ambient wind speed to ride through short time duties without endangering the public. Since a 1 % risk is accepted for emergency ratings, these ratings are limited to abnormal configurations and a very specific duration. The longer the short time duration, the more risk is assumed. Emergency Rating periods are not to exceed 24 hours. Due to the thermal time constant of electrical conductors, all emergency ratings longer than 15 minutes are essentially the same. The only increase available is by assuming more risk.

17

9.0 Assumptions for Calculations

This section of the report summarizes the program parameters for normal and emergency conditions.

9.1 Normal Conditions

Normal Operating Conditions assume that all equipment and conductors are available and in normal operating configuration. The normal weather conditions, as listed below, are assumed to exist during normal operating conditions. During normal weather conditions it is assumed that the conductor under consideration can operate at continuous duty. The normal ratings are based upon normal weather conditions and have insignificant risk of exceeding the conductor’s design temperature since they incorporate a zero wind speed.

Typical Normal Conditions-Summer:

Ambient Temperature: 35°C (Planning) Wind Speed: 0 feet per second Wind Direction: 90o to conductor Solar/ Sky: Day - Industrial Elevation: 200 ft above sea level Max. Allowable conductor temp.: 100°-180°C Latitude: 40° North Latitude Sun Time: 14:00 Emissivity: 0.7 Absorptivity: 0.9

Typical Normal Conditions-Winter:

Ambient Temperature: 10°C (Planning) Wind Speed: 0 feet per second Wind Direction: 90o to conductor Solar/ Sky: Day - Industrial Elevation: 200 ft above sea level Max. Allowable conductor temp.: 100°-180°C Latitude: 40° North Latitude Sun Time: 14:00 Emissivity: 0.7 Absorptivity: 0.9

18

9.2 Emergency Conditions

Emergency Operating Conditions require that the conductor under consideration operate for a short time above its normal rating. The weather conditions for conductor rating during emergency conditions are specified below. Therefore, this short time emergency rating is limited to no more than 24 hours per occurrence. These ratings are based upon a 1 % risk of exceeding the conductor’s design temperature.

Typical Emergency Conditions-Summer: Ambient Temperature: 35°C (Planning) Wind Speed: 1.5 Kt. (2.533 ft/sec.) Wind Direction: 90o to conductor Solar/ Sky Radiated Heat Flux: Day - Industrial Elevation: 200 f above sea level Max. Allowable conductor temp.: 100°-180°C Latitude: 40° North Latitude Sun Time: 14:00 Emissivity: 0.7 Absorptivity: 0.9 Typical Emergency Conditions-Winter: Ambient Temperature: 10°C (Planning) Wind Speed: 1.5 Kt. (2.533 ft/sec. ) Wind Direction: 90o to conductor Solar/ Sky Radiated Heat Flux: Day - Industrial Elevation: 200 ft above sea level Max. Allowable conductor temp.: 100°-180°C Latitude: 40° North Latitude Sun Time: 14:00 Emissivity: 0.7 Absorptivity: 0.9

19

9.3 Discussion of Assumptions for Ampacity Calculations

Using the Method of IEEE Std. 738-1993

Day and Night Ratings Daylight hours are, for operating purposes, between sunrise and sunset. Night ratings should be used during all other periods.

Atmosphere

The task force evaluated the environmental conditions in the PJM service area and selected the “industrial” atmosphere.

Sun Time The sun times available for use range between 10:00 am and 2:00 pm in hourly steps. The task force chose 2:00 p.m. because that time is nearest to the typical peak ambient temperature.

Latitude The task force chose 40 degrees north as this latitude approximately divides the PJM service territory in half.

Conductor Direction The task force studied a geographic map of the PJM service territory and determined that it became apparent that most lines are primarily oriented east-west. Therefore this direction was chosen as the input for the program.

Wind Direction The task force chose the wind angle of 90 degrees to the conductor, which is consistent with earlier PJM work. It also results in maximum cooling for any given wind speed.

Conductor Elevation The task force discussed the various terrain and elevations within their respective areas and agreed to a conductor elevation of 200 feet above sea level as a good average value.

Conductor Resistance The task force reviewed the conductor resistances used in previous studies (1973 and 1980) and also current day reference materials. We concluded current day reference materials are readily available and better represent the materials used in modern conductors. The task force used data from Reference No. 3.

Emissivity/Absorptivity

The task force sees no reason to change the values of emissivity and absorptivity adopted in previous reports as these values are the result of original work. To our knowledge, this work has never been repeated.

20

The values used are emissivity = 0.7, absorptivity = 0.9 for daytime and 0.0 for nighttime. For additional discussion, see Appendix C of the 1973 PJM Report.

Conductor Temperature

The task force chose a maximum conductor temperature to fall between 100°C and 180°C in 10°C increments. 125°C was also chosen as a temperature.

21

10.0 IEEE Standard 738-1993 For Calculating the Current-Temperature Relationship of Bare Overhead Conductors

Early in its deliberations, The PJM Conductor Rating Task Force recognized that an “updated” method of calculating conductor ratings was needed to replace the original computer code which was written in FORTRAN in 1973. Another goal of the task force was to have a user friendly program that could operate in today’s office environment. The task force selected the method of IEEE Standard 738-1993 as its method of calculation. Copies of the standard are widely available at modest cost and include a program written in the BASIC programming language. Further, the method is based upon the 1958 work of House and Tuttle as modified by a group sponsored by the East Central Area Reliability Co-Ordination Agreement (ECAR) and is similar to the “PJM Method” of calculating bare overhead conductor ratings. The task force developed a Microsoft Excel 97© Spreadsheet, which applies the IEEE 738 method of calculation to simplify the calculation of conductor ratings by all PJM member companies. Description of IEEE 738

The standard presents a method of calculating the current-temperature relationship of bare overhead conductors. The conductor temperature is a function of a. Conductor material b. Conductor diameter c. Conductor surface condition d. Ambient weather conditions e. Conductor electrical current This standard includes mathematical methods for the calculation of conductor temperatures and conductor thermal ratings. Due to a great diversity of weather conditions and operating circumstances for which conductor temperatures and/or thermal ratings must be calculated, the standard does not list actual temperature-current relationships for specific conductors or weather conditions. Each user must make an assessment of which weather data and conductor characteristics are appropriate. The equations relating electrical current to conductor temperature may be used in either of the following two ways: - To calculate the conductor temperature when the electrical current is known - To calculate the current that yields a given maximum allowable conductor

temperature The calculation methods developed in this standard are also valid for the calculation of conductor temperature under fault conditions.

22

11.0 Comparison of IEEE-738 Method and PJM Method

A comparison was made between the results of the IEEE-738 and published results of the PJM Method . The task force compared both daytime and nighttime results for three representative conductors used by PJM Companies over a range of temperatures. The difference in the calculated ratings by the two methods ranged from –3.6% to +2.5% and were therefore comparable. Charts showing the results follow. The conductors compared were: 1. 556.5 kcm 24/7 ACSR (Parakeet) Table 11-1 2. 1590 kcm 45/7 ACSR (Lapwing) Table 11-2 3. 2493 kcm 54/37 ACAR Table 11-3

23

Table 11-1

Comparison of PJM and IEEE Std 738-1993 Ratings 556 24/7 ACSR Parakeet at 125 C Max Conductor Temp.

Calculations for Day

NORMAL RATING EMERGENCY RATING

Ambient NO WIND 2.533 Ft/s WIND Temperature IEEE PJM Difference IEEE PJM Difference

40 779 791 -1.5% 1024 1014 1.0% 35 806 815 -1.1% 1054 1041 1.2% 30 832 838 -0.7% 1082 1067 1.4% 25 857 861 -0.5% 1110 1092 1.6% 20 882 883 -0.1% 1136 1116 1.8% 15 906 905 0.1% 1162 1140 1.9% 10 929 926 0.3% 1187 1163 2.1% 5 952 948 0.4% 1212 1186 2.2% 0 975 969 0.6% 1235 1208 2.2% -5 997 989 0.8% 1258 1230 2.3% -10 1018 1009 0.9% 1281 1251 2.4% -15 1040 1030 1.0% 1303 1272 2.4%

Calculations for Night NORMAL RATING EMERGENCY RATING


40 841 872 -3.6% 1073 1078 -0.5% 35 866 894 -3.1% 1101 1103 -0.2% 30 891 915 -2.6% 1128 1128 0.0% 25 914 936 -2.4% 1155 1152 0.3% 20 938 956 -1.9% 1180 1175 0.4% 15 960 976 -1.6% 1205 1198 0.6% 10 982 996 -1.4% 1229 1220 0.7% 5 1004 1016 -1.2% 1253 1242 0.9% 0 1025 1036 -1.1% 1276 1263 1.0% -5 1046 1055 -0.9% 1298 1284 1.1% -10 1067 1074 -0.7% 1320 1304 1.2% -15 1087 1093 -0.5% 1341 1324 1.3%

24

Table 11-2

Comparison of PJM and IEEE Std 738-1993 Ratings 1590 45/7 ACSR Lapwing at 125 C Max Conductor Temp.




40 1572 1593 -1.3% 1957 1940 0.9% 35 1626 1640 -0.8% 2013 1990 1.2% 30 1678 1686 -0.5% 2068 2039 1.4% 25 1729 1731 -0.1% 2120 2086 1.6% 20 1778 1775 0.2% 2170 2132 1.8% 15 1826 1818 0.4% 2219 2177 1.9% 10 1873 1861 0.6% 2267 2220 2.1% 5 1918 1903 0.8% 2313 2263 2.2% 0 1963 1945 0.9% 2357 2305 2.3% -5 2007 1986 1.0% 2401 2345 2.4% -10 2049 2026 1.2% 2443 2385 2.4% -15 2091 2066 1.2% 2484 2424 2.5%



40 1709 1769 -3.4% 2068 2087 -0.9% 35 1758 1812 -3.0% 2122 2184 -2.9% 30 1807 1853 -2.5% 2173 2179 -0.3% 25 1854 1894 -2.1% 2223 2224 0.0% 20 1900 1935 -1.8% 2271 2267 0.2% 15 1945 1975 -1.5% 2318 2309 0.4% 10 1989 2014 -1.3% 2363 2350 0.6% 5 2032 2053 -1.0% 2408 2391 0.7% 0 2074 2092 -0.9% 2450 2430 0.8% -5 2115 2130 -0.7% 2492 2469 0.9% -10 2156 2167 -0.5% 2533 2506 1.1% -15 2196 2205 -0.4% 2573 2544 1.1%

25

Table 11-3

Comparison of PJM and IEEE Std 738-1993 Ratings 2493 54/37 ACAR at 125 C Max Conductor Temp.




40 2052 2082 -1.4% 2503 2488 0.6% 35 2122 2143 -1.0% 2575 2552 0.9% 30 2190 2203 -0.6% 2644 2614 1.1% 25 2255 2261 -0.3% 2711 2674 1.4% 20 2319 2319 0.0% 2775 2733 1.5% 15 2381 2375 0.3% 2838 2790 1.7% 10 2442 2431 0.5% 2898 2845 1.9% 5 2501 2485 0.6% 2957 2899 2.0% 0 2559 2539 0.8% 3013 2952 2.1% -5 2615 2592 0.9% 3068 3004 2.1% -10 2671 2645 1.0% 3122 3054 2.2% -15 2725 2697 1.0% 3174 3104 2.3%



40 2235 2319 -3.6% 2655 2690 -1.3% 35 2299 2374 -3.2% 2723 2749 -0.9% 30 2362 2428 -2.7% 2789 2807 -0.6% 25 2423 2481 -2.3% 2852 2863 -0.4% 20 2483 2534 -2.0% 2913 2917 -0.1% 15 2541 2586 -1.7% 2973 2971 0.1% 10 2598 2637 -1.5% 3030 3023 0.2% 5 2653 2687 -1.3% 3086 3074 0.4% 0 2708 2737 -1.1% 3141 3124 0.5% -5 2761 2787 -0.9% 3194 3173 0.7% -10 2814 2836 -0.8% 3245 3221 0.7% -15 2866 2884 -0.6% 3296 3268 0.9%

26

Appendix 1

Frequency Distribution of Wind and Ambient Temperature Conditions

27

Table 12-1 - SUMMER

AMBIENT TEMP.οοοοC 0 1 2 3 4 5 OVER 5

0 0.009 0.025 0.042 0.024 0.059 0.070 1.8305 0.038 0.115 0.195 0.247 0.326 0.427 6.455

10 0.059 0.176 0.299 0.345 0.519 0.634 8.81115 0.070 0.209 0.355 0.484 0.741 0.955 11.14720 0.103 0.311 0.528 0.655 1.049 1.401 14.55925 0.109 0.324 0.550 0.791 1.405 1.743 17.94930 0.059 0.178 0.302 0.496 0.962 1.381 14.70835 0.012 0.034 0.058 0.127 0.261 0.389 4.650

Over 35 0.000 0.001 0.001 0.003 0.009 0.010 0.1870.459 1.373 2.330 3.172 5.331 7.010 80.296


0 0.031 0.090 0.153 0.114 0.248 0.271 2.9985 0.125 0.373 0.632 0.659 0.921 1.135 8.495

10 0.174 0.524 0.887 0.987 1.340 1.453 10.00315 0.257 0.773 1.312 1.174 1.654 2.089 11.97520 0.351 1.020 1.730 1.582 2.254 2.600 13.95225 0.236 0.711 1.207 1.671 2.205 2.582 12.84630 0.037 0.112 0.188 0.342 0.426 0.516 2.49035 0.000 0.001 0.002 0.006 0.013 0.011 0.064

Over 35 0.000 0.000 0.000 0.000 0.000 0.000 0.0001.211 3.604 6.111 6.535 9.061 10.657 62.823

Note: Data is taken from page A-18, of 1973 PJM report, "Determination of Thermal Ratings for Bare Overhead Conductors".

SUMMER DAYS

WIND SPEED-KNOTS

SUMMER NIGHTS

WIND SPEED-KNOTS

PITTSBURGH AND WASHINGTON D.C.

FREQUENCY OF OCCURRENCE (PERCENT)

COMPOSITE WEATHER DATA

PITTSBURGH 1/1/49 - 12/31/58 - 10 YEARS NATIONAL AIRPORT 1/1/49 - 12/31/64 - 16 YEARS TOTAL COMPOSITE HOURLY RECORD - 26 YEARS

28

Table 12-2 - WINTER

FREQUENCY OF OCCURRENCE (PERCENT)

WINTER DAYS

WIND SPEED-KNOTS


0 0.105 0.321 0.541 0.751 1.315 1.649 22.1465 0.233 0.695 1.184 1.633 2.380 2.912 31.41810 0.118 0.354 0.600 0.875 1.079 1.351 16.74915 0.046 0.134 0.230 0.282 0.344 0.433 7.30220 0.007 0.023 0.039 0.062 0.062 0.082 2.16425 0.000 0.000 0.000 0.003 0.000 0.003 0.34830 0.000 0.000 0.000 0.000 0.000 0.000 0.00735 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Over 35 0.000 0.000 0.000 0.000 0.000 0.000 0.0000.509 1.527 2.594 3.606 5.180 6.430 80.134

WINTER NIGHTS

WIND SPEED-KNOTSAMBIENT TEMP.

οοοοC 0 1 2 3 4 5 OVER 5

0 0.287 0.856 1.453 1.581 2.709 3.038 27.2655 0.450 1.345 2.282 2.778 3.286 3.592 28.54810 0.136 0.411 0.791 0.709 0.884 1.073 10.87315 0.023 0.078 0.132 0.151 0.213 0.190 3.95320 0.004 0.008 0.016 0.004 0.012 0.012 0.91825 0.000 0.000 0.000 0.000 0.000 0.000 0.00830 0.000 0.000 0.000 0.000 0.000 0.000 0.00035 0.000 0.000 0.000 0.000 0.000 0.000 0.000

Over 35 0.000 0.000 0.000 0.000 0.000 0.000 0.0000.900 2.698 4.674 5.223 7.104 7.905 71.565

Note: Data is taken from page A-19, of 1973 PJM report, "Determination of Thermal Ratings for Bare Overhead Conductors".

TOTAL COMPOSITE HOURLY RECORD - 26 YEARS

PITTSBURGH AND WASHINGTON D.C. COMPOSITE WEATHER DATA

PITTSBURGH 1/1/49 - 12/31/58 - 10 YEARS NATIONAL AIRPORT 1/1/49 - 12/31/64 - 16 YEARS

29

Figure 12-3

PJM LOAD CYCLE(SUMMER AND WINTER)

WEEKDAY100

% 70

ofnormalrating

DAYLIGHT HOURS

12 M 8 AM 12 N 8 PM 12 MAM PM

TIME OF DAY

100 WEEK END

% 70

ofnormalrating

DAYLIGHT HOURS

12 M 8 AM 12 N 8 PM 12 MAM PM

TIME OF DAY

30

Appendix 2

Example of Loss of Strength Calculations

31

09.1TSTR

STSTR100TSTR

ECSTRECRSRS ∗��

��

�∗+��

�

��

�∗= ( ) ( )

d1.0095.0T001.0

t134T24.0ECRS∗−∗−

∗+∗−=( ) 100Use100134T24.0If >+∗−

Appendix 2 Example of Loss of Strength Calculation for 1590 kcmil 45/7 ACSR (Lapwing)

1. The following Temperatures and Durations were obtained from the weather model computer program developed for the 1973 PJM conductor report

Temperature (°C) Duration

(Hours) 100 402 105 284 110 225 115 132 120 67 125 14 130 1 135 1

2. From the Paper “Effect of Elevated Temperature Operation on the Strength of Aluminum Conductors” (reference 13.1) the following equations and variables for calculating loss of strength in ACSR conductors are:

Where: RS = Remaining strength as a percentage of initial strength.

RS EC = Remaining strength as a percentage of initial strength of the EC strands.

T = Temperature (°C) t = Elapsed time (hours)

D = Strand diameter (inches)

STR EC= Calculated initial strength of EC strands (lb)

STR ST = Calculated initial strength of the steel core (lb)

STR T = Calculated initial strength of the conductor (lb)

32

lb27,2850.91kip

lb1000ksi24.0in0.0277645 2 =∗��

��

�∗∗∗

lbkip

lbksiin 915,1496.0100018001233.07 2 =∗��

��

�∗∗∗

lb200,42lb915,14lb285,27 =+

Step 1 Calculate Initial Strength of the Conductor and Aluminum and Steel Components From: ASTM B232 “Standard Specification for Concentric-Lay Stranded Aluminum Conductors, Coated-Steel Reinforced (ACSR)” Aluminum 45 strands @ 0.1880" dia. ea., Area of One Strand = 0.02776 in2 , Rating Factor = 91% Average Tensile Strength (ASTM B230) = 24.0 ksi Steel 7 strands @ 0.1253" dia. Ea. Area of One Strand = 0.01233 in2 Rating Factor = 96% Strength at 1% Elongation (ASTM B498) = 180.0 ksi Total Conductor Aluminum: (STR EC) Steel Core: (STR ST) Conductor: (STR T)

33

09.1TSTR

STSTR100TSTR

ECSTRECRSRS ∗��

��

�∗+��

�

��

�∗=

%65.9809.1lb200,42lb915,14100

lb200,42lb285,2793RS =∗��

�

��

�∗+��

�

��

�∗=

RS100StrengthofLoss −=

%35.165.98100StrengthofLoss =−=

Step 2 Determine Remaining Strength (RS) of Aluminum Strands Using the equation for RS EC and inputting various temperatures and durations into an Excel spreadsheet, curves (% Remaining Strength vs. Hours) for each temperature can be developed. Then using these curves, the remaining strength of the aluminum strands can be determined. 402 hrs at 100°C results in RS = 98% is equivalent to 20 hrs at 105°C

284 + 20 hrs at 105°C results in RS = 97% is equivalent to 47 hrs at 110°C

225 + 47 hrs at 110°C results in RS = 96% is equivalent to73 hrs at 115°C





1 + 26 hrs at 135°C results in RS = 93%

Step 3 Determine The Remaining Strength of the Conductor Step 4 Determine Loss of Strength of the Conductor

34

Appendix 3

Determination of Bare Overhead Conductor Ratings January 1973

CONDUCTOR RATING TAKS FORCEFOR

PENNSYLVANIA – NEW JERSEY – MARYLANDINTERCONNECTION

TRANSMISSION & SUBSTATION DESIGN SUBCOMMITTEE

Transmission Engineering

35


36


37


38


39


40


41


42


43


44


45


46


47


48


49


50


51


52


53


54


55


56


57


58


59


60


61


62


63


64


65


66


67


68


69


70


71


72


73


74


75


76


77


78


79


80


81


82


83


84


85


86


87


88


89


90


91


92


93


94


95


96


97


98


99


100


101


102


103


104


105


106


107


108


109

110

Appendix 4

Ambient Adjusted Thermal Ratings for Bare Overhead Conductors

May 1980


111


112


113


114


115


116


117


118


119


120


121


122


123


124


125


126


127


128


129


130


131


132


133


134


135


136


137


138


139


140


141


142


143


144


145


146


147


148

149

Appendix 5

Rating Calculation Spreadsheet Printout

15

0

Con

duct

or D

ata

Nam

eD

iam

eter

0.91

4in

ches

T low

(min

imum

con

duct

or te

mpe

ratu

re)

25o C

T hig

h (m

axim

um c

ondu

ctor

tem

pera

ture

)10

0o C

Res

ista

nce@

T low

3.08

710E

-05

ohm

s/ft

Res

ista

nce@

T hig

h4.

0151

0E-0

5oh

ms/

ft

556

24/7

ACS

R

15

1

Wea

ther

Dat

a

Sunt

ime

14:0

0 ho

urs

Deg

rees

Nor

th L

atitu

de40

o

Atm

osph

ere

Indu

stria

lEm

issi

vity

(ε)

0.7

Abso

rptiv

ity (α

)0.

9Am

bien

t Tem

pera

ture

Ran

ge

-15o C

to 4

0o CEl

evat

ion

Abov

e Se

a Le

vel

200

ftW

inds

peed

N

orm

al0

(ft/s

ec)

E

mer

g.2.

533

(ft/s

ec)

Z 1 (A

ngle

bet

wee

n w

ind

and

cond

ucto

r)90

o

K ang

le (W

ind

dire

ctio

n fa

ctor

)1

Hc

(Alti

tude

of t

he s

un) a

t 14:

00 H

ours

59.7

3o

Qs

(Tot

al h

eat f

lux)

at 1

4:00

Hou

rs72

.03

(W/ft

2 )Z c

(Azi

mut

h of

the

sun)

with

Indu

stria

l Atm

osph

ere

245.

20o

θ (E

ffect

ive

angl

e of

inci

denc

e of

the

sun'

s ra

ys)

117.

23o

15

2

Con

duct

or D

ata

Tabl

e

Nam

eDi

amet

erRl

owTl

owRh

igh

Thig

hin

ches

ohm

/k ft

deg

Coh

m/k

ftde

g C

336

26/7

ACS

R0.

7210

0.05

0568

0025

0.06

5718

9910

055

6 24

/7 A

CSR

0.91

400.

0308

7100

250.

0401

5100

100

795

26/7

ACS

R1.

1080

0.02

1591

0025

0.02

8030

0010

079

5 30

/19

ACSR

1.14

000.

0215

9100

250.

0280

3000

100

795

54/7

ACS

R1.

0930

0.02

1780

0025

0.02

8409

0010

010

33.5

45/

7 AC

SR1.

2120

0.01

7140

0025

0.02

2349

0010

010

33.5

54/

7 AC

SR1.

2440

0.01

6913

0025

0.02

1970

0010

012

72 4

5/7

ACSR

1.34

500.

0141

2900

250.

0183

7100

100

1272

54/

19 A

CSR

1.38

200.

0138

6400

250.

0180

3000

100

1590

45/

7 AC

SR1.

5040

0.01

1515

0025

0.01

4981

0010

015

90 5

4/19

ACS

R1.

5450

0.01

1155

0025

0.01

4507

0010

017

80 8

4/19

ACS

R1.

6020

0.01

0379

0025

0.01

3504

0010

021

67 7

2/7

ACSR

1.73

700.

0090

1400

250.

0112

3700

100

2300

84/

19 A

CSR

1.82

100.

0084

9500

250.

0106

2700

100

2493

54/

37 A

CSR

1.82

100.

0085

4200

250.

0104

9200

100

a

153

Conductor Electrical Resistance (R), (Ohms/ft.)

556 24/7 ACSR

Rating Condition

W ind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05Emerg 2.533 100 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05 4.0E-05










T film (degrees C) = (T c + T a)/2

556 24/7 ACSR

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0 67.5 70.0Emerg 2.533 100 42.5 45.0 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0 67.5 70.0

Normal 0 110 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0Emerg 2.533 110 47.5 50.0 52.5 55.0 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0

Normal 0 120 52.5 55.0 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0Emerg 2.533 120 52.5 55.0 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0

Normal 0 125 55.0 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5Emerg 2.533 125 55.0 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5

Normal 0 130 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0Emerg 2.533 130 57.5 60.0 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0

Normal 0 140 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0Emerg 2.533 140 62.5 65.0 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0

Normal 0 150 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0Emerg 2.533 150 67.5 70.0 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0

Normal 0 160 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0Emerg 2.533 160 72.5 75.0 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0

Normal 0 170 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0 102.5 105.0Emerg 2.533 170 77.5 80.0 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0 102.5 105.0

Normal 0 180 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0 102.5 105.0 107.5 110.0Emerg 2.533 180 82.5 85.0 87.5 90.0 92.5 95.0 97.5 100.0 102.5 105.0 107.5 110.0

154

Air Density (ρρρρf), (lb/ft3)

556 24/7 ACSR

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 0.0693 0.06876 0.06822 0.06769 0.06717 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374Emerg 2.533 100 0.0693 0.06876 0.06822 0.06769 0.06717 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374

Normal 0 110 0.06822 0.06769 0.06717 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282Emerg 2.533 110 0.06822 0.06769 0.06717 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282

Normal 0 120 0.06717 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193Emerg 2.533 120 0.06717 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193

Normal 0 125 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615Emerg 2.533 125 0.06666 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615

Normal 0 130 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107Emerg 2.533 130 0.06615 0.06566 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107

Normal 0 140 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022Emerg 2.533 140 0.06517 0.06468 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022

Normal 0 150 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594Emerg 2.533 150 0.06421 0.06374 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594

Normal 0 160 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594 0.059 0.05861Emerg 2.533 160 0.06328 0.06282 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594 0.059 0.05861

Normal 0 170 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594 0.059 0.05861 0.05822 0.05783Emerg 2.533 170 0.06237 0.06193 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594 0.059 0.05861 0.05822 0.05783

Normal 0 180 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594 0.059 0.05861 0.05822 0.05783 0.05745 0.05707Emerg 2.533 180 0.0615 0.06107 0.06064 0.06022 0.05981 0.0594 0.059 0.05861 0.05822 0.05783 0.05745 0.05707

Absolute Viscosity of Air (µµµµf), (lb/ft*h)

556 24/7 ACSR

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 0.04642 0.0467 0.04698 0.04726 0.04753 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943Emerg 2.533 100 0.04642 0.0467 0.04698 0.04726 0.04753 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943

Normal 0 110 0.04698 0.04726 0.04753 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996Emerg 2.533 110 0.04698 0.04726 0.04753 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996

Normal 0 120 0.04753 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049Emerg 2.533 120 0.04753 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049

Normal 0 125 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076Emerg 2.533 125 0.0478 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076

Normal 0 130 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102Emerg 2.533 130 0.04808 0.04835 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102

Normal 0 140 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155Emerg 2.533 140 0.04862 0.04889 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155

Normal 0 150 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207Emerg 2.533 150 0.04916 0.04943 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207

Normal 0 160 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207 0.05233 0.05258Emerg 2.533 160 0.0497 0.04996 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207 0.05233 0.05258

Normal 0 170 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207 0.05233 0.05258 0.05284 0.0531Emerg 2.533 170 0.05023 0.05049 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207 0.05233 0.05258 0.05284 0.0531

Normal 0 180 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207 0.05233 0.05258 0.05284 0.0531 0.05336 0.05361Emerg 2.533 180 0.05076 0.05102 0.05128 0.05155 0.05181 0.05207 0.05233 0.05258 0.05284 0.0531 0.05336 0.05361

155

Thermal Conductivity of Air (k f) at Temperature , T film W/ft (degrees C)

556 24/7 ACSR

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 0.00835 0.00841 0.00847 0.00852 0.00858 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898Emerg 2.533 100 0.00835 0.00841 0.00847 0.00852 0.00858 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898

Normal 0 110 0.00847 0.00852 0.00858 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909Emerg 2.533 110 0.00847 0.00852 0.00858 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909

Normal 0 120 0.00858 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092Emerg 2.533 120 0.00858 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092

Normal 0 125 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926Emerg 2.533 125 0.00864 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926

Normal 0 130 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932Emerg 2.533 130 0.00869 0.00875 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932

Normal 0 140 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943Emerg 2.533 140 0.00881 0.00886 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943

Normal 0 150 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954Emerg 2.533 150 0.00892 0.00898 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954

Normal 0 160 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954 0.0096 0.00965Emerg 2.533 160 0.00903 0.00909 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954 0.0096 0.00965

Normal 0 170 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954 0.0096 0.00965 0.00971 0.00977Emerg 2.533 170 0.00915 0.0092 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954 0.0096 0.00965 0.00971 0.00977

Normal 0 180 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954 0.0096 0.00965 0.00971 0.00977 0.00982 0.00988Emerg 2.533 180 0.00926 0.00932 0.00937 0.00943 0.00948 0.00954 0.0096 0.00965 0.00971 0.00977 0.00982 0.00988

Convected Heat Loss (q c), Watts Per Foot of Conductor

556 24/7 ACSR

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 26.227 24.712 23.224 21.765 20.335 18.933 17.561 16.218 14.905 13.623 12.372 11.153Emerg 2.533 100 48.980 46.836 44.693 42.553 40.414 38.277 36.142 34.008 31.875 29.744 27.614 25.485

Normal 0 110 28.880 27.337 25.820 24.331 22.870 21.436 20.029 18.651 17.301 15.980 14.688 13.425Emerg 2.533 110 53.206 51.063 48.922 46.783 44.646 42.510 40.375 38.242 36.111 33.980 31.851 29.723

Normal 0 120 31.551 29.982 28.439 26.922 25.432 23.968 22.531 21.120 19.737 18.381 17.052 15.751Emerg 2.533 120 57.431 55.289 53.150 51.012 48.876 46.741 44.607 42.475 40.345 38.215 36.086 33.959

Normal 0 125 32.892 31.311 29.755 28.226 26.722 25.244 23.793 22.367 20.968 19.595 18.250 16.931Emerg 2.533 125 59.542 57.402 55.263 53.126 50.990 48.856 46.723 44.591 42.461 40.332 38.204 36.077

Normal 0 130 34.236 32.644 31.076 29.534 28.018 26.526 25.061 23.621 22.207 20.819 19.457 18.122Emerg 2.533 130 61.654 59.514 57.376 55.239 53.104 50.971 48.838 46.707 44.577 42.449 40.321 38.194

Normal 0 140 36.934 35.319 33.729 32.163 30.622 29.106 27.614 26.147 24.705 23.288 21.896 20.529Emerg 2.533 140 65.876 63.737 61.601 59.466 57.332 55.200 53.068 50.938 48.809 46.681 44.554 42.428

Normal 0 150 39.641 38.006 36.395 34.807 33.244 31.704 30.188 28.696 27.228 25.784 24.364 22.969Emerg 2.533 150 70.097 67.961 65.826 63.692 61.559 59.428 57.298 55.169 53.041 50.914 48.788 46.662

Normal 0 160 42.357 40.702 39.071 37.463 35.878 34.317 32.779 31.264 29.772 28.303 26.858 25.436Emerg 2.533 160 74.319 72.184 70.050 67.918 65.787 63.657 61.528 59.400 57.272 55.146 53.021 50.896

Normal 0 170 45.078 43.405 41.756 40.129 38.524 36.943 35.383 33.847 32.333 30.841 29.372 27.926Emerg 2.533 170 78.541 76.408 74.275 72.144 70.014 67.885 65.757 63.630 61.504 59.379 57.254 55.130

Normal 0 180 47.804 46.114 44.447 42.802 41.180 39.579 38.000 36.443 34.908 33.395 31.904 30.435Emerg 2.533 180 82.764 80.632 78.501 76.371 74.242 72.114 69.988 67.862 65.736 63.612 61.488 59.365

156

Solar Heat Gain (q s), Watts Per Foot of Conductor

556 24/7 ACSR

Rating Condition


Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 100 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 110 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 110 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 120 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 120 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 125 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 125 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 130 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 130 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 140 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 140 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 150 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 150 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 160 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 160 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 170 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 170 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Normal 0 180 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391Emerg 2.533 180 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391 4.391

Radiated Heat Loss (q r), Watts Per Foot of Conductor

556 24/7 ACSR

Rating Condition


Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 13.1786 12.8664 12.5359 12.1864 11.8171 11.4274 11.0164 10.5835 10.1278 9.6486 9.1451 8.6164Emerg 2.533 100 13.1786 12.8664 12.5359 12.1864 11.8171 11.4274 11.0164 10.5835 10.1278 9.6486 9.1451 8.6164

Normal 0 110 15.0864 14.7742 14.4437 14.0942 13.7249 13.3352 12.9242 12.4913 12.0356 11.5564 11.0529 10.5242Emerg 2.533 110 15.0864 14.7742 14.4437 14.0942 13.7249 13.3352 12.9242 12.4913 12.0356 11.5564 11.0529 10.5242

Normal 0 120 17.1497 16.8375 16.5070 16.1574 15.7882 15.3984 14.9874 14.5545 14.0988 13.6196 13.1161 12.5875Emerg 2.533 120 17.1497 16.8375 16.5070 16.1574 15.7882 15.3984 14.9874 14.5545 14.0988 13.6196 13.1161 12.5875

Normal 0 125 18.2421 17.9300 17.5994 17.2499 16.8806 16.4909 16.0799 15.6470 15.1913 14.7121 14.2086 13.6799Emerg 2.533 125 18.2421 17.9300 17.5994 17.2499 16.8806 16.4909 16.0799 15.6470 15.1913 14.7121 14.2086 13.6799

Normal 0 130 19.3766 19.0644 18.7339 18.3843 18.0151 17.6253 17.2143 16.7814 16.3257 15.8465 15.3430 14.8144Emerg 2.533 130 19.3766 19.0644 18.7339 18.3843 18.0151 17.6253 17.2143 16.7814 16.3257 15.8465 15.3430 14.8144

Normal 0 140 21.7756 21.4634 21.1329 20.7833 20.4141 20.0243 19.6133 19.1804 18.7247 18.2455 17.7420 17.2134Emerg 2.533 140 21.7756 21.4634 21.1329 20.7833 20.4141 20.0243 19.6133 19.1804 18.7247 18.2455 17.7420 17.2134

Normal 0 150 24.3553 24.0431 23.7126 23.3631 22.9938 22.6040 22.1931 21.7601 21.3045 20.8253 20.3217 19.7931Emerg 2.533 150 24.3553 24.0431 23.7126 23.3631 22.9938 22.6040 22.1931 21.7601 21.3045 20.8253 20.3217 19.7931

Normal 0 160 27.1246 26.8124 26.4819 26.1324 25.7631 25.3734 24.9624 24.5295 24.0738 23.5946 23.0911 22.5624Emerg 2.533 160 27.1246 26.8124 26.4819 26.1324 25.7631 25.3734 24.9624 24.5295 24.0738 23.5946 23.0911 22.5624

Normal 0 170 30.0926 29.7804 29.4499 29.1004 28.7311 28.3414 27.9304 27.4974 27.0418 26.5626 26.0591 25.5304Emerg 2.533 170 30.0926 29.7804 29.4499 29.1004 28.7311 28.3414 27.9304 27.4974 27.0418 26.5626 26.0591 25.5304

Normal 0 180 33.2685 32.9564 32.6258 32.2763 31.9070 31.5173 31.1063 30.6734 30.2177 29.7385 29.2350 28.7063Emerg 2.533 180 33.2685 32.9564 32.6258 32.2763 31.9070 31.5173 31.1063 30.6734 30.2177 29.7385 29.2350 28.7063

157

DAY - Steady State Thermal Rating (Ampacity), Amperes

556 24/7 ACSR Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 934 909 884 858 832 804 776 747 717 686 653 619Emerg 2.533 100 1199 1174 1147 1120 1092 1062 1032 1001 968 934 898 860

Normal 0 110 978 955 931 907 882 857 831 804 776 748 718 687Emerg 2.533 110 1243 1218 1194 1168 1142 1115 1087 1058 1028 997 965 931

Normal 0 120 1020 998 975 953 930 906 882 857 831 805 778 750Emerg 2.533 120 1283 1261 1237 1214 1189 1164 1138 1111 1084 1055 1025 994

Normal 0 125 1040 1018 997 975 952 929 906 882 857 832 806 779Emerg 2.533 125 1303 1281 1258 1235 1212 1187 1162 1136 1110 1082 1054 1024

Normal 0 130 1059 1039 1018 996 974 952 929 906 882 858 833 807Emerg 2.533 130 1322 1301 1279 1256 1233 1210 1186 1161 1135 1109 1081 1053

Normal 0 140 1097 1078 1058 1038 1017 996 975 953 930 908 884 860Emerg 2.533 140 1359 1339 1318 1297 1275 1253 1231 1207 1183 1159 1133 1107

Normal 0 150 1134 1115 1097 1077 1058 1038 1018 997 976 955 933 910Emerg 2.533 150 1394 1375 1356 1336 1315 1294 1273 1251 1229 1206 1182 1157

Normal 0 160 1170 1152 1134 1116 1097 1078 1059 1039 1020 999 979 957Emerg 2.533 160 1428 1410 1392 1373 1354 1334 1314 1293 1272 1250 1228 1205

Normal 0 170 1204 1187 1170 1153 1135 1117 1099 1080 1061 1042 1023 1003Emerg 2.533 170 1461 1444 1427 1409 1390 1372 1353 1333 1313 1293 1272 1250

Normal 0 180 1238 1222 1205 1188 1172 1154 1137 1119 1102 1083 1065 1046Emerg 2.533 180 1494 1477 1460 1443 1426 1408 1390 1372 1353 1333 1313 1293

NIGHT - Steady State Thermal Rating (Ampacity), Amperes

556 24/7 ACSR Planning Rating W inter Planning Rating Summer

Rating Condition


Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 991 967 944 920 895 870 844 817 790 761 732 702Emerg 2.533 100 1244 1219 1194 1168 1141 1113 1084 1054 1023 991 957 922

Normal 0 110 1031 1009 986 964 940 917 892 867 842 816 789 761Emerg 2.533 110 1285 1261 1237 1213 1188 1162 1135 1107 1079 1049 1018 986

Normal 0 120 1069 1048 1027 1005 983 961 938 915 891 866 841 815Emerg 2.533 120 1323 1301 1278 1255 1232 1207 1182 1157 1130 1103 1074 1045

Normal 0 125 1087 1067 1046 1025 1004 982 960 938 914 891 866 841Emerg 2.533 125 1341 1320 1298 1276 1253 1229 1205 1180 1155 1128 1101 1073

Normal 0 130 1106 1086 1066 1045 1024 1003 982 960 937 914 891 867Emerg 2.533 130 1359 1338 1317 1296 1273 1251 1227 1203 1178 1153 1127 1099

Normal 0 140 1141 1122 1103 1084 1064 1044 1023 1003 981 960 937 915Emerg 2.533 140 1394 1374 1354 1334 1313 1291 1269 1247 1224 1200 1175 1150

Normal 0 150 1175 1157 1139 1120 1102 1083 1063 1043 1023 1003 982 961Emerg 2.533 150 1428 1409 1390 1371 1351 1331 1310 1288 1267 1244 1221 1198

Normal 0 160 1208 1191 1174 1156 1138 1120 1102 1083 1064 1044 1025 1004Emerg 2.533 160 1460 1443 1424 1406 1387 1368 1348 1328 1308 1287 1265 1243

Normal 0 170 1241 1224 1208 1191 1174 1156 1139 1121 1103 1084 1066 1046Emerg 2.533 170 1492 1475 1458 1440 1422 1404 1385 1366 1347 1327 1306 1285

Normal 0 180 1273 1257 1241 1225 1208 1192 1175 1158 1141 1123 1105 1087Emerg 2.533 180 1523 1506 1490 1473 1456 1439 1421 1403 1385 1366 1346 1327

158

Appendix 6 EXCEL Rating Spreadsheet Output

for Common PJM Conductors

159

336 26/7 ACSR - Linnet Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 657 639 621 603 584 565 545 525 504 482 459 435Emerg 2.533 100 867 848 829 809 789 768 746 723 700 675 649 622

Normal 0 110 687 671 654 637 620 602 584 565 545 525 504 483Emerg 2.533 110 898 880 862 844 825 805 785 764 743 720 697 672

Normal 0 120 717 701 685 669 653 636 619 601 583 565 546 526Emerg 2.533 120 927 910 893 876 858 840 821 802 782 761 740 718

Normal 0 125 731 716 700 685 669 652 636 619 602 584 565 546Emerg 2.533 125 940 924 908 891 874 857 838 820 801 781 760 739

Normal 0 130 744 730 715 700 684 668 652 636 619 602 584 566Emerg 2.533 130 954 938 923 906 890 873 855 837 818 799 780 759

Normal 0 140 771 757 743 728 714 699 684 668 653 636 620 603Emerg 2.533 140 980 965 950 935 919 903 887 870 853 835 816 797

Normal 0 150 796 783 770 756 742 728 714 699 684 669 654 638Emerg 2.533 150 1005 991 977 962 948 932 917 901 885 868 851 833

Normal 0 160 821 809 796 783 770 756 743 729 715 700 686 671Emerg 2.533 160 1029 1016 1002 989 975 960 946 931 915 900 883 867

Normal 0 170 845 833 821 809 796 783 770 757 744 730 716 702Emerg 2.533 170 1052 1040 1027 1014 1001 987 973 959 944 930 914 899

Normal 0 180 869 857 845 833 822 809 797 785 772 759 746 732Emerg 2.533 180 1075 1063 1051 1038 1026 1013 1000 986 972 958 944 929


336 26/7 ACSR - Linnet Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 695 679 662 645 627 609 591 572 553 533 512 491Emerg 2.533 100 896 878 860 841 821 801 780 758 736 712 688 663

Normal 0 110 723 707 692 675 659 642 625 607 589 571 552 532Emerg 2.533 110 925 908 891 873 855 836 816 796 776 754 732 709

Normal 0 120 750 735 720 705 689 673 657 641 624 606 589 570Emerg 2.533 120 953 937 920 903 886 869 850 832 813 793 772 751

Normal 0 125 763 748 734 719 704 688 673 657 640 623 606 589Emerg 2.533 125 966 950 934 918 901 884 867 849 830 811 791 771

Normal 0 130 775 761 747 733 718 703 688 672 656 640 623 606Emerg 2.533 130 978 963 948 932 916 899 882 865 847 828 809 790

Normal 0 140 800 787 773 759 745 731 717 702 687 672 656 640Emerg 2.533 140 1003 989 974 959 944 929 912 896 879 862 844 826

Normal 0 150 824 811 798 785 772 758 745 731 716 702 687 672Emerg 2.533 150 1027 1014 1000 985 971 956 941 926 910 894 877 860

Normal 0 160 847 835 823 810 798 785 772 758 745 731 717 703Emerg 2.533 160 1050 1037 1024 1011 997 983 969 954 939 924 908 892

Normal 0 170 870 858 846 834 822 810 798 785 772 759 746 732Emerg 2.533 170 1072 1060 1048 1035 1022 1008 995 981 967 952 937 922

Normal 0 180 892 881 870 858 846 835 823 811 798 786 773 760Emerg 2.533 180 1094 1082 1070 1058 1046 1033 1020 1007 993 980 966 951


160

556 24/7 ACSR - Parakeet Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 927 903 878 852 826 799 771 742 712 681 648 614Emerg 2.533 100 1191 1165 1139 1112 1084 1055 1025 993 961 927 891 854

Normal 0 110 971 948 925 901 876 851 825 798 771 743 713 683Emerg 2.533 110 1234 1210 1186 1160 1134 1107 1080 1051 1021 990 958 924

Normal 0 120 1013 991 969 946 923 900 876 851 826 800 773 745Emerg 2.533 120 1275 1252 1229 1206 1181 1156 1131 1104 1077 1048 1019 988

Normal 0 125 1033 1012 990 968 946 923 900 876 852 826 800 774Emerg 2.533 125 1294 1273 1250 1227 1204 1180 1155 1129 1103 1075 1047 1018

Normal 0 130 1053 1032 1011 990 968 946 923 900 877 852 827 802Emerg 2.533 130 1313 1292 1271 1248 1226 1202 1178 1153 1128 1102 1074 1046

Normal 0 140 1091 1071 1051 1031 1011 990 969 947 925 902 879 855Emerg 2.533 140 1350 1330 1310 1289 1268 1246 1223 1200 1176 1152 1126 1100

Normal 0 150 1128 1109 1090 1071 1052 1032 1012 991 970 949 927 905Emerg 2.533 150 1386 1367 1348 1328 1308 1287 1266 1244 1222 1199 1175 1151

Normal 0 160 1163 1145 1127 1109 1091 1072 1053 1034 1014 994 973 952Emerg 2.533 160 1420 1402 1384 1365 1346 1326 1306 1286 1265 1243 1221 1198

Normal 0 170 1198 1181 1164 1146 1129 1111 1093 1074 1056 1036 1017 997Emerg 2.533 170 1453 1436 1419 1401 1383 1364 1345 1326 1306 1286 1265 1243

Normal 0 180 1231 1215 1199 1182 1165 1148 1131 1114 1096 1078 1059 1040Emerg 2.533 180 1486 1469 1453 1436 1418 1401 1383 1364 1345 1326 1306 1286


556 24/7 ACSR - Parakeet Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 984 961 937 913 888 863 838 811 784 756 727 697Emerg 2.533 100 1235 1211 1185 1159 1132 1105 1076 1046 1016 983 950 915

Normal 0 110 1024 1002 980 957 934 910 886 861 836 810 783 755Emerg 2.533 110 1276 1253 1229 1205 1179 1154 1127 1100 1071 1042 1011 979

Normal 0 120 1062 1041 1020 999 977 955 932 909 885 861 836 810Emerg 2.533 120 1314 1292 1270 1247 1224 1199 1175 1149 1123 1095 1067 1038

Normal 0 125 1080 1060 1040 1019 998 976 954 932 909 885 861 836Emerg 2.533 125 1333 1311 1290 1267 1245 1221 1197 1173 1147 1121 1094 1066

Normal 0 130 1099 1079 1059 1039 1018 997 976 954 931 909 885 861Emerg 2.533 130 1351 1330 1309 1287 1265 1243 1219 1195 1171 1146 1119 1092

Normal 0 140 1134 1115 1096 1077 1057 1037 1017 996 975 954 932 909Emerg 2.533 140 1386 1366 1346 1326 1305 1284 1262 1239 1216 1193 1168 1143

Normal 0 150 1168 1150 1132 1114 1095 1076 1057 1037 1017 997 976 955Emerg 2.533 150 1419 1401 1382 1363 1343 1323 1302 1281 1259 1237 1214 1191

Normal 0 160 1202 1185 1167 1150 1132 1114 1095 1077 1058 1039 1019 999Emerg 2.533 160 1452 1434 1416 1398 1379 1360 1341 1321 1300 1279 1258 1236

Normal 0 170 1234 1218 1201 1184 1167 1150 1133 1115 1097 1079 1060 1041Emerg 2.533 170 1484 1467 1450 1432 1415 1396 1378 1359 1340 1320 1299 1279

Normal 0 180 1266 1250 1234 1218 1202 1186 1169 1152 1135 1117 1099 1081Emerg 2.533 180 1515 1499 1482 1466 1449 1431 1414 1396 1377 1359 1339 1320


161

795 26/7 ACSR - Drake Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1200 1168 1136 1103 1069 1034 998 961 922 882 840 796Emerg 2.533 100 1508 1476 1442 1408 1372 1336 1298 1258 1217 1174 1128 1081

Normal 0 110 1258 1228 1198 1167 1135 1102 1069 1035 999 963 925 885Emerg 2.533 110 1564 1534 1503 1471 1438 1404 1369 1332 1295 1255 1214 1172

Normal 0 120 1312 1284 1256 1227 1197 1167 1136 1104 1071 1037 1002 966Emerg 2.533 120 1617 1589 1560 1530 1499 1467 1435 1401 1366 1330 1293 1254

Normal 0 125 1339 1312 1284 1256 1227 1197 1167 1137 1105 1072 1039 1004Emerg 2.533 125 1643 1615 1587 1558 1528 1498 1466 1434 1400 1366 1330 1292

Normal 0 130 1365 1338 1311 1284 1256 1227 1198 1168 1138 1106 1074 1041Emerg 2.533 130 1668 1641 1613 1585 1557 1527 1497 1465 1433 1400 1365 1329

Normal 0 140 1415 1390 1364 1338 1312 1285 1258 1230 1201 1172 1141 1110Emerg 2.533 140 1716 1691 1665 1638 1611 1583 1555 1526 1495 1464 1432 1399

Normal 0 150 1463 1439 1415 1391 1366 1340 1314 1288 1261 1233 1205 1176Emerg 2.533 150 1762 1738 1714 1689 1663 1637 1610 1583 1555 1526 1496 1465

Normal 0 160 1510 1487 1464 1441 1417 1393 1368 1343 1318 1292 1265 1238Emerg 2.533 160 1807 1785 1761 1738 1713 1689 1663 1637 1611 1584 1555 1527

Normal 0 170 1556 1534 1512 1490 1467 1444 1421 1397 1373 1348 1323 1297Emerg 2.533 170 1851 1829 1807 1785 1762 1738 1714 1690 1665 1639 1612 1585

Normal 0 180 1600 1580 1558 1537 1516 1494 1471 1449 1426 1403 1379 1354Emerg 2.533 180 1893 1873 1852 1830 1808 1786 1763 1740 1716 1692 1667 1642


795 26/7 ACSR - Drake Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1275 1246 1215 1185 1153 1121 1087 1053 1018 982 945 906Emerg 2.533 100 1569 1538 1506 1473 1439 1404 1368 1330 1291 1251 1208 1164

Normal 0 110 1328 1300 1271 1242 1212 1182 1151 1119 1086 1053 1018 982Emerg 2.533 110 1621 1592 1562 1531 1500 1467 1434 1399 1363 1326 1287 1247

Normal 0 120 1378 1351 1324 1297 1269 1240 1211 1181 1150 1119 1087 1054Emerg 2.533 120 1671 1643 1615 1586 1557 1526 1495 1463 1429 1395 1359 1322

Normal 0 125 1402 1376 1350 1323 1296 1268 1240 1211 1181 1151 1119 1087Emerg 2.533 125 1695 1668 1641 1613 1584 1555 1524 1493 1461 1428 1394 1358

Normal 0 130 1426 1401 1375 1349 1323 1295 1268 1240 1211 1181 1151 1120Emerg 2.533 130 1718 1692 1666 1639 1611 1582 1553 1523 1492 1460 1427 1392

Normal 0 140 1473 1449 1424 1399 1374 1348 1322 1296 1269 1241 1212 1183Emerg 2.533 140 1764 1739 1714 1689 1662 1635 1608 1579 1550 1520 1490 1458

Normal 0 150 1518 1495 1472 1448 1424 1400 1375 1349 1324 1298 1271 1243Emerg 2.533 150 1808 1785 1761 1737 1712 1686 1660 1634 1606 1578 1549 1519

Normal 0 160 1562 1540 1518 1495 1472 1449 1425 1401 1377 1352 1327 1301Emerg 2.533 160 1851 1828 1806 1783 1759 1735 1710 1685 1659 1633 1606 1578

Normal 0 170 1605 1584 1562 1541 1519 1497 1474 1451 1428 1404 1380 1356Emerg 2.533 170 1892 1871 1849 1828 1805 1782 1759 1735 1711 1685 1660 1633

Normal 0 180 1647 1627 1606 1586 1565 1543 1522 1500 1478 1455 1432 1409Emerg 2.533 180 1933 1913 1892 1871 1850 1828 1806 1783 1760 1736 1712 1687


162

795 30/19 ACSR - Mallard Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1218 1186 1153 1119 1085 1049 1013 975 936 895 852 808Emerg 2.533 100 1526 1493 1459 1425 1389 1352 1313 1273 1231 1187 1142 1094

Normal 0 110 1276 1246 1216 1184 1152 1119 1085 1050 1014 977 939 898Emerg 2.533 110 1583 1552 1521 1488 1455 1421 1385 1348 1310 1270 1229 1186

Normal 0 120 1332 1304 1275 1245 1215 1184 1153 1120 1087 1053 1017 981Emerg 2.533 120 1636 1608 1578 1548 1517 1485 1452 1418 1383 1346 1308 1269

Normal 0 125 1359 1331 1303 1275 1245 1216 1185 1154 1122 1089 1055 1019Emerg 2.533 125 1662 1634 1606 1576 1546 1515 1484 1451 1417 1382 1346 1308

Normal 0 130 1385 1358 1331 1303 1275 1246 1216 1186 1155 1123 1090 1057Emerg 2.533 130 1687 1660 1633 1604 1575 1545 1514 1483 1450 1416 1381 1345

Normal 0 140 1436 1411 1385 1358 1332 1304 1277 1248 1219 1189 1159 1127Emerg 2.533 140 1736 1711 1685 1658 1631 1602 1574 1544 1513 1482 1450 1416

Normal 0 150 1485 1461 1436 1411 1386 1360 1334 1307 1280 1252 1223 1194Emerg 2.533 150 1783 1759 1734 1709 1683 1657 1630 1602 1573 1544 1514 1482

Normal 0 160 1533 1510 1486 1463 1438 1414 1389 1364 1338 1311 1284 1257Emerg 2.533 160 1829 1806 1782 1758 1734 1709 1683 1657 1630 1603 1574 1545

Normal 0 170 1579 1557 1535 1512 1489 1466 1442 1418 1394 1369 1343 1317Emerg 2.533 170 1873 1851 1829 1806 1783 1759 1735 1710 1685 1659 1632 1605

Normal 0 180 1624 1603 1582 1560 1538 1516 1494 1471 1447 1424 1400 1375Emerg 2.533 180 1916 1895 1874 1852 1830 1808 1785 1761 1737 1713 1687 1662


795 30/19 ACSR - Mallard Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1295 1265 1234 1203 1171 1138 1104 1070 1034 997 959 920Emerg 2.533 100 1588 1557 1524 1491 1457 1421 1385 1347 1307 1266 1224 1179

Normal 0 110 1348 1320 1291 1261 1231 1200 1169 1136 1103 1069 1034 998Emerg 2.533 110 1641 1611 1581 1550 1518 1485 1451 1416 1380 1342 1303 1262

Normal 0 120 1399 1372 1345 1317 1288 1259 1230 1199 1168 1136 1104 1070Emerg 2.533 120 1691 1663 1635 1606 1576 1545 1514 1481 1447 1412 1376 1339

Normal 0 125 1424 1397 1371 1343 1316 1288 1259 1229 1199 1168 1137 1104Emerg 2.533 125 1715 1688 1661 1633 1604 1574 1543 1512 1479 1446 1411 1375

Normal 0 130 1448 1422 1396 1370 1343 1315 1287 1259 1230 1200 1169 1138Emerg 2.533 130 1739 1713 1686 1659 1631 1602 1572 1542 1510 1478 1444 1410

Normal 0 140 1495 1471 1446 1421 1395 1369 1343 1316 1288 1260 1231 1202Emerg 2.533 140 1785 1761 1735 1709 1683 1656 1628 1599 1570 1539 1508 1476

Normal 0 150 1541 1518 1494 1470 1446 1421 1396 1370 1344 1317 1290 1262Emerg 2.533 150 1830 1806 1782 1758 1733 1707 1681 1654 1626 1598 1568 1538

Normal 0 160 1585 1563 1541 1518 1494 1471 1447 1423 1398 1373 1347 1321Emerg 2.533 160 1873 1851 1828 1805 1781 1756 1732 1706 1680 1653 1626 1597

Normal 0 170 1629 1608 1586 1564 1542 1519 1497 1473 1450 1426 1401 1377Emerg 2.533 170 1915 1894 1872 1850 1827 1804 1781 1756 1732 1706 1680 1654

Normal 0 180 1672 1651 1630 1609 1588 1567 1545 1523 1500 1478 1454 1431Emerg 2.533 180 1956 1936 1915 1894 1872 1850 1828 1805 1782 1758 1733 1708


163

795 54/7 ACSR - Condor Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1166 1136 1104 1072 1039 1005 970 934 896 857 816 773Emerg 2.533 100 1468 1437 1404 1371 1336 1300 1263 1225 1185 1143 1099 1052

Normal 0 110 1220 1191 1162 1132 1101 1069 1037 1004 969 934 897 858Emerg 2.533 110 1520 1490 1460 1429 1397 1364 1330 1295 1258 1220 1180 1138

Normal 0 120 1271 1244 1216 1188 1159 1130 1100 1069 1037 1004 970 935Emerg 2.533 120 1568 1541 1512 1483 1454 1423 1391 1359 1325 1290 1254 1216

Normal 0 125 1295 1269 1242 1215 1187 1158 1129 1099 1069 1037 1005 971Emerg 2.533 125 1592 1565 1538 1509 1481 1451 1421 1389 1357 1323 1288 1252

Normal 0 130 1319 1293 1267 1241 1214 1186 1158 1129 1100 1069 1038 1006Emerg 2.533 130 1614 1588 1562 1535 1507 1478 1449 1418 1387 1355 1321 1287

Normal 0 140 1365 1341 1316 1291 1266 1240 1213 1186 1159 1130 1101 1071Emerg 2.533 140 1658 1634 1609 1583 1557 1530 1503 1474 1445 1415 1384 1352

Normal 0 150 1410 1387 1363 1340 1316 1291 1266 1241 1215 1188 1161 1133Emerg 2.533 150 1700 1677 1654 1630 1605 1580 1554 1527 1500 1472 1443 1413

Normal 0 160 1453 1431 1409 1386 1363 1340 1316 1292 1268 1243 1217 1191Emerg 2.533 160 1741 1719 1697 1674 1651 1627 1603 1578 1552 1526 1498 1471

Normal 0 170 1495 1474 1453 1431 1409 1387 1365 1342 1319 1295 1271 1246Emerg 2.533 170 1781 1760 1739 1717 1695 1672 1649 1626 1601 1577 1551 1525

Normal 0 180 1535 1515 1495 1475 1454 1433 1412 1390 1368 1345 1323 1299Emerg 2.533 180 1819 1799 1779 1758 1737 1716 1694 1672 1649 1626 1602 1577


795 54/7 ACSR - Condor Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1240 1211 1181 1151 1121 1089 1057 1024 990 954 918 880Emerg 2.533 100 1527 1497 1466 1434 1401 1367 1331 1295 1257 1217 1176 1133

Normal 0 110 1288 1261 1233 1205 1176 1146 1116 1085 1054 1021 987 953Emerg 2.533 110 1575 1546 1517 1488 1457 1425 1393 1359 1324 1288 1250 1211

Normal 0 120 1334 1308 1282 1255 1228 1201 1172 1143 1114 1083 1052 1020Emerg 2.533 120 1620 1593 1566 1538 1509 1480 1449 1418 1386 1352 1318 1282

Normal 0 125 1356 1331 1306 1280 1253 1227 1199 1171 1142 1113 1083 1052Emerg 2.533 125 1642 1616 1589 1562 1535 1506 1477 1446 1415 1383 1350 1315

Normal 0 130 1378 1354 1329 1304 1278 1252 1225 1198 1170 1142 1112 1083Emerg 2.533 130 1663 1638 1612 1586 1559 1531 1503 1474 1444 1413 1381 1347

Normal 0 140 1421 1398 1374 1350 1326 1301 1276 1250 1224 1197 1170 1142Emerg 2.533 140 1704 1681 1656 1632 1606 1580 1554 1526 1498 1469 1439 1408

Normal 0 150 1462 1440 1418 1395 1372 1348 1324 1300 1275 1250 1224 1198Emerg 2.533 150 1744 1722 1699 1675 1651 1627 1602 1576 1549 1522 1494 1466

Normal 0 160 1502 1481 1460 1438 1416 1394 1371 1348 1324 1300 1276 1251Emerg 2.533 160 1783 1761 1740 1717 1695 1671 1648 1623 1598 1573 1547 1520

Normal 0 170 1542 1521 1501 1480 1459 1438 1416 1394 1372 1349 1326 1302Emerg 2.533 170 1820 1800 1779 1758 1736 1714 1692 1669 1645 1621 1596 1571

Normal 0 180 1580 1560 1541 1521 1501 1481 1460 1439 1418 1396 1374 1352Emerg 2.533 180 1857 1837 1818 1797 1777 1756 1735 1713 1690 1668 1644 1620


164

1033.5 45/7 ACSR - Ortolan Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1397 1360 1322 1284 1244 1204 1162 1118 1073 1027 978 926Emerg 2.533 100 1738 1701 1662 1623 1582 1540 1496 1450 1402 1353 1300 1245

Normal 0 110 1464 1429 1394 1358 1321 1284 1245 1205 1164 1121 1077 1031Emerg 2.533 110 1803 1768 1732 1695 1658 1618 1578 1536 1492 1447 1400 1351

Normal 0 120 1528 1495 1462 1428 1394 1359 1322 1285 1247 1208 1167 1125Emerg 2.533 120 1864 1831 1798 1764 1728 1692 1654 1616 1575 1534 1491 1446

Normal 0 125 1558 1527 1495 1462 1428 1394 1359 1324 1287 1249 1210 1170Emerg 2.533 125 1894 1862 1829 1796 1762 1727 1691 1653 1615 1575 1533 1490

Normal 0 130 1588 1558 1527 1495 1462 1429 1395 1361 1325 1289 1251 1212Emerg 2.533 130 1922 1892 1860 1828 1795 1761 1726 1690 1653 1614 1574 1533

Normal 0 140 1647 1618 1588 1558 1527 1496 1464 1432 1399 1364 1329 1293Emerg 2.533 140 1978 1949 1920 1889 1858 1826 1793 1760 1725 1689 1652 1614

Normal 0 150 1703 1675 1647 1619 1590 1560 1530 1500 1468 1436 1403 1370Emerg 2.533 150 2032 2005 1977 1948 1919 1888 1858 1826 1793 1760 1725 1690

Normal 0 160 1758 1731 1705 1677 1650 1622 1593 1564 1535 1505 1474 1442Emerg 2.533 160 2084 2058 2031 2004 1976 1948 1919 1889 1859 1827 1795 1762

Normal 0 170 1811 1786 1760 1734 1708 1681 1654 1627 1599 1570 1541 1511Emerg 2.533 170 2135 2110 2084 2059 2032 2005 1978 1950 1921 1891 1861 1830

Normal 0 180 1862 1838 1814 1789 1764 1739 1713 1687 1660 1633 1606 1578Emerg 2.533 180 2184 2160 2136 2111 2086 2061 2035 2008 1981 1953 1924 1895


1033.5 45/7 ACSR - Ortolan Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1486 1452 1417 1381 1344 1306 1268 1228 1187 1145 1102 1056Emerg 2.533 100 1811 1775 1738 1700 1661 1621 1579 1536 1491 1445 1396 1345

Normal 0 110 1547 1514 1481 1447 1413 1378 1342 1305 1267 1228 1187 1146Emerg 2.533 110 1871 1837 1803 1768 1731 1694 1655 1615 1574 1531 1487 1440

Normal 0 120 1605 1574 1543 1511 1478 1445 1411 1377 1341 1305 1267 1229Emerg 2.533 120 1928 1897 1864 1831 1797 1762 1726 1689 1651 1611 1570 1528

Normal 0 125 1633 1603 1573 1542 1510 1478 1445 1411 1377 1341 1305 1268Emerg 2.533 125 1956 1925 1894 1862 1829 1795 1760 1724 1687 1649 1610 1569

Normal 0 130 1661 1632 1602 1572 1541 1510 1478 1445 1411 1377 1342 1306Emerg 2.533 130 1983 1953 1923 1892 1860 1827 1793 1758 1723 1686 1648 1608

Normal 0 140 1715 1687 1659 1630 1601 1571 1541 1510 1478 1446 1413 1379Emerg 2.533 140 2036 2007 1979 1949 1919 1888 1856 1824 1790 1756 1720 1684

Normal 0 150 1768 1741 1714 1687 1659 1630 1602 1572 1543 1512 1481 1449Emerg 2.533 150 2086 2060 2032 2004 1976 1947 1917 1886 1855 1822 1789 1755

Normal 0 160 1819 1793 1767 1741 1715 1688 1660 1633 1604 1575 1546 1516Emerg 2.533 160 2136 2110 2084 2058 2031 2003 1975 1946 1916 1886 1855 1822

Normal 0 170 1868 1844 1819 1794 1769 1743 1717 1691 1664 1636 1608 1580Emerg 2.533 170 2184 2160 2135 2110 2084 2058 2031 2004 1975 1947 1917 1887

Normal 0 180 1917 1894 1870 1846 1822 1798 1773 1747 1722 1696 1669 1642Emerg 2.533 180 2231 2208 2184 2160 2136 2111 2085 2059 2032 2005 1977 1949


165

1033.5 54/7 ACSR - Curlew Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1400 1363 1326 1287 1248 1207 1165 1121 1076 1029 980 929Emerg 2.533 100 1737 1700 1662 1622 1581 1539 1495 1449 1402 1352 1300 1245

Normal 0 110 1465 1431 1396 1360 1323 1285 1246 1206 1165 1122 1078 1032Emerg 2.533 110 1799 1765 1729 1692 1655 1615 1575 1533 1490 1445 1397 1348

Normal 0 120 1527 1495 1462 1428 1394 1358 1322 1285 1247 1208 1167 1125Emerg 2.533 120 1858 1826 1792 1758 1723 1687 1649 1611 1571 1529 1486 1441

Normal 0 125 1557 1526 1493 1461 1427 1393 1358 1323 1286 1248 1209 1169Emerg 2.533 125 1887 1855 1823 1790 1756 1721 1685 1647 1609 1569 1528 1485

Normal 0 130 1586 1556 1524 1493 1460 1427 1393 1359 1323 1287 1250 1211Emerg 2.533 130 1914 1884 1852 1820 1787 1753 1719 1683 1646 1607 1568 1527

Normal 0 140 1643 1614 1584 1554 1524 1493 1461 1428 1395 1361 1326 1290Emerg 2.533 140 1968 1939 1909 1879 1848 1817 1784 1750 1716 1680 1644 1606

Normal 0 150 1697 1669 1641 1613 1584 1555 1525 1494 1463 1431 1399 1365Emerg 2.533 150 2019 1992 1964 1936 1906 1877 1846 1815 1782 1749 1715 1680

Normal 0 160 1750 1723 1697 1670 1642 1615 1586 1557 1528 1498 1467 1436Emerg 2.533 160 2069 2043 2017 1990 1962 1934 1905 1875 1845 1814 1782 1749

Normal 0 170 1801 1776 1750 1725 1699 1672 1645 1618 1590 1562 1533 1503Emerg 2.533 170 2117 2092 2067 2042 2016 1989 1962 1934 1905 1876 1846 1815

Normal 0 180 1850 1826 1802 1778 1753 1728 1702 1676 1650 1623 1596 1568Emerg 2.533 180 2164 2140 2117 2092 2068 2042 2016 1990 1963 1935 1907 1878


1033.5 54/7 ACSR - Curlew Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1490 1456 1421 1385 1348 1310 1272 1232 1191 1149 1105 1060Emerg 2.533 100 1810 1775 1738 1700 1661 1621 1580 1536 1492 1445 1396 1345

Normal 0 110 1549 1516 1483 1450 1415 1380 1344 1307 1269 1230 1189 1148Emerg 2.533 110 1868 1835 1800 1765 1729 1692 1653 1613 1572 1529 1485 1439

Normal 0 120 1605 1574 1543 1511 1479 1445 1412 1377 1341 1305 1267 1229Emerg 2.533 120 1923 1891 1859 1826 1792 1758 1722 1685 1647 1607 1566 1524

Normal 0 125 1632 1602 1572 1541 1509 1477 1444 1411 1376 1341 1305 1268Emerg 2.533 125 1949 1919 1888 1856 1823 1789 1754 1719 1682 1644 1605 1564

Normal 0 130 1659 1630 1600 1570 1539 1508 1476 1443 1410 1376 1341 1305Emerg 2.533 130 1975 1946 1915 1884 1852 1820 1786 1752 1716 1679 1642 1602

Normal 0 140 1711 1683 1655 1626 1597 1568 1537 1507 1475 1443 1410 1377Emerg 2.533 140 2025 1997 1969 1939 1909 1879 1847 1815 1782 1747 1712 1676

Normal 0 150 1762 1735 1708 1681 1653 1625 1596 1567 1537 1507 1476 1445Emerg 2.533 150 2074 2047 2020 1992 1964 1935 1905 1875 1844 1812 1779 1745

Normal 0 160 1810 1785 1760 1734 1707 1680 1653 1625 1597 1569 1539 1509Emerg 2.533 160 2121 2095 2070 2043 2017 1989 1961 1932 1903 1873 1842 1810

Normal 0 170 1858 1834 1810 1785 1760 1734 1708 1682 1655 1628 1600 1572Emerg 2.533 170 2166 2142 2118 2093 2067 2041 2015 1988 1960 1931 1902 1872

Normal 0 180 1905 1882 1858 1835 1811 1786 1762 1736 1711 1685 1659 1632Emerg 2.533 180 2211 2188 2165 2141 2117 2092 2067 2041 2015 1988 1960 1932


166

1272 45/7 ACSR - Bittern Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1612 1570 1526 1482 1436 1389 1341 1291 1239 1185 1129 1069Emerg 2.533 100 1983 1940 1897 1851 1805 1757 1706 1654 1600 1543 1483 1420

Normal 0 110 1690 1651 1610 1569 1526 1483 1438 1392 1344 1295 1244 1191Emerg 2.533 110 2058 2019 1978 1936 1893 1848 1802 1754 1704 1653 1599 1542

Normal 0 120 1765 1728 1690 1651 1611 1570 1529 1486 1442 1396 1350 1301Emerg 2.533 120 2130 2093 2055 2015 1975 1934 1891 1847 1801 1753 1704 1653

Normal 0 125 1801 1765 1728 1690 1651 1612 1572 1530 1488 1444 1399 1353Emerg 2.533 125 2164 2128 2091 2054 2015 1974 1933 1890 1846 1801 1753 1704

Normal 0 130 1836 1801 1765 1728 1691 1653 1614 1574 1533 1491 1447 1403Emerg 2.533 130 2198 2163 2127 2091 2053 2014 1974 1933 1890 1847 1801 1754

Normal 0 140 1905 1871 1837 1803 1767 1731 1695 1657 1619 1579 1539 1497Emerg 2.533 140 2264 2231 2197 2162 2127 2090 2053 2014 1975 1934 1892 1848

Normal 0 150 1971 1939 1907 1874 1841 1806 1772 1736 1700 1663 1625 1587Emerg 2.533 150 2327 2296 2264 2231 2197 2163 2128 2092 2055 2016 1977 1936

Normal 0 160 2035 2005 1974 1943 1911 1879 1846 1812 1778 1743 1708 1671Emerg 2.533 160 2388 2358 2328 2297 2265 2233 2200 2166 2131 2095 2058 2020

Normal 0 170 2098 2069 2039 2009 1979 1948 1917 1886 1853 1820 1787 1752Emerg 2.533 170 2447 2419 2390 2361 2331 2300 2269 2237 2204 2170 2135 2099

Normal 0 180 2158 2131 2103 2074 2045 2016 1986 1956 1926 1894 1862 1830Emerg 2.533 180 2505 2478 2451 2423 2394 2365 2335 2305 2274 2242 2209 2175


1272 45/7 ACSR - Bittern Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1717 1677 1637 1596 1553 1510 1466 1420 1373 1325 1274 1222Emerg 2.533 100 2069 2028 1987 1944 1899 1853 1806 1757 1706 1652 1597 1539

Normal 0 110 1788 1751 1712 1674 1634 1593 1552 1509 1465 1420 1374 1326Emerg 2.533 110 2139 2101 2062 2022 1981 1938 1894 1848 1801 1752 1702 1649

Normal 0 120 1856 1821 1785 1748 1710 1672 1633 1593 1552 1510 1467 1422Emerg 2.533 120 2206 2170 2134 2096 2057 2017 1976 1934 1890 1845 1798 1750

Normal 0 125 1889 1855 1820 1784 1747 1710 1672 1633 1594 1553 1511 1468Emerg 2.533 125 2238 2204 2168 2131 2094 2055 2016 1975 1933 1889 1844 1797

Normal 0 130 1922 1888 1854 1819 1784 1747 1710 1673 1634 1595 1554 1513Emerg 2.533 130 2270 2236 2202 2166 2130 2092 2054 2014 1974 1932 1888 1843

Normal 0 140 1985 1953 1921 1887 1854 1819 1785 1749 1713 1675 1637 1599Emerg 2.533 140 2332 2300 2267 2233 2199 2164 2128 2091 2053 2013 1973 1931

Normal 0 150 2047 2016 1985 1954 1922 1889 1856 1822 1788 1753 1717 1680Emerg 2.533 150 2391 2361 2330 2298 2266 2232 2198 2163 2128 2091 2053 2014

Normal 0 160 2107 2078 2048 2018 1987 1956 1925 1893 1860 1827 1793 1758Emerg 2.533 160 2449 2420 2391 2361 2330 2298 2266 2233 2199 2165 2129 2092

Normal 0 170 2166 2138 2109 2080 2051 2022 1991 1961 1930 1898 1866 1833Emerg 2.533 170 2506 2478 2450 2421 2392 2362 2332 2300 2268 2236 2202 2167

Normal 0 180 2223 2196 2169 2141 2113 2085 2056 2027 1998 1968 1937 1906Emerg 2.533 180 2561 2535 2508 2481 2453 2424 2395 2366 2335 2304 2272 2240


167

1272 54/19 ACSR - Pheasant Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1613 1571 1527 1483 1437 1391 1342 1292 1240 1186 1130 1070Emerg 2.533 100 1978 1936 1892 1847 1801 1753 1703 1650 1596 1539 1480 1417

Normal 0 110 1689 1649 1609 1568 1525 1482 1437 1391 1344 1294 1243 1190Emerg 2.533 110 2051 2011 1971 1929 1886 1841 1795 1748 1698 1647 1593 1537

Normal 0 120 1761 1724 1686 1647 1608 1567 1525 1483 1439 1394 1347 1298Emerg 2.533 120 2119 2082 2044 2005 1965 1924 1881 1837 1792 1745 1695 1644

Normal 0 125 1796 1760 1723 1685 1647 1608 1567 1526 1484 1440 1396 1349Emerg 2.533 125 2152 2116 2080 2042 2003 1963 1922 1880 1836 1791 1744 1695

Normal 0 130 1830 1795 1759 1722 1685 1647 1608 1569 1528 1486 1443 1398Emerg 2.533 130 2184 2150 2114 2077 2040 2001 1962 1921 1879 1835 1790 1743

Normal 0 140 1896 1863 1829 1794 1759 1723 1687 1649 1611 1572 1532 1491Emerg 2.533 140 2247 2214 2180 2146 2111 2075 2038 1999 1960 1920 1878 1835

Normal 0 150 1959 1928 1896 1863 1830 1796 1761 1726 1690 1654 1616 1578Emerg 2.533 150 2307 2276 2244 2212 2179 2145 2110 2074 2037 1999 1960 1920

Normal 0 160 2021 1991 1960 1929 1898 1866 1833 1800 1766 1731 1696 1660Emerg 2.533 160 2365 2335 2305 2275 2243 2211 2179 2145 2110 2075 2038 2001

Normal 0 170 2081 2052 2023 1993 1963 1933 1902 1871 1838 1806 1772 1738Emerg 2.533 170 2421 2393 2365 2336 2306 2276 2245 2213 2180 2147 2113 2077

Normal 0 180 2139 2111 2084 2055 2027 1998 1969 1939 1908 1877 1846 1814Emerg 2.533 180 2476 2449 2422 2395 2367 2338 2308 2278 2248 2216 2184 2150


1272 54/19 ACSR - Pheasant Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1719 1679 1639 1597 1555 1512 1467 1422 1375 1326 1276 1224Emerg 2.533 100 2065 2025 1983 1940 1896 1850 1803 1754 1703 1650 1594 1536

Normal 0 110 1787 1750 1712 1673 1633 1593 1551 1509 1465 1420 1374 1326Emerg 2.533 110 2132 2094 2055 2015 1974 1932 1888 1843 1796 1747 1696 1644

Normal 0 120 1853 1817 1781 1745 1707 1669 1630 1590 1549 1508 1464 1420Emerg 2.533 120 2196 2160 2124 2086 2048 2008 1967 1925 1882 1837 1790 1742

Normal 0 125 1884 1850 1815 1779 1743 1706 1668 1629 1590 1549 1508 1465Emerg 2.533 125 2226 2192 2156 2120 2083 2044 2005 1964 1923 1879 1835 1788

Normal 0 130 1916 1882 1848 1813 1778 1742 1705 1668 1629 1590 1550 1508Emerg 2.533 130 2257 2223 2189 2153 2117 2080 2042 2003 1962 1920 1877 1833

Normal 0 140 1976 1944 1912 1879 1845 1811 1777 1741 1705 1668 1630 1592Emerg 2.533 140 2315 2283 2251 2217 2183 2148 2113 2076 2038 1999 1959 1918

Normal 0 150 2035 2005 1974 1942 1911 1878 1845 1812 1778 1743 1707 1671Emerg 2.533 150 2371 2341 2310 2279 2247 2214 2180 2146 2110 2074 2036 1997

Normal 0 160 2092 2063 2034 2004 1974 1943 1912 1880 1847 1814 1781 1746Emerg 2.533 160 2426 2397 2368 2339 2308 2277 2245 2212 2179 2145 2109 2073

Normal 0 170 2148 2121 2092 2064 2035 2006 1976 1946 1915 1883 1852 1819Emerg 2.533 170 2479 2452 2424 2396 2367 2338 2308 2277 2245 2213 2179 2145

Normal 0 180 2203 2176 2150 2122 2095 2067 2038 2009 1980 1950 1920 1889Emerg 2.533 180 2532 2506 2479 2452 2425 2397 2368 2339 2309 2278 2247 2214


168

1590 45/7 ACSR - Lapwing Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1875 1826 1776 1724 1671 1617 1561 1502 1442 1379 1314 1244Emerg 2.533 100 2279 2230 2180 2128 2074 2019 1961 1901 1839 1773 1704 1632

Normal 0 110 1968 1922 1875 1827 1777 1727 1675 1621 1566 1509 1449 1387Emerg 2.533 110 2368 2322 2275 2227 2178 2126 2073 2018 1961 1901 1839 1774

Normal 0 120 2056 2013 1968 1923 1877 1830 1781 1732 1681 1628 1573 1517Emerg 2.533 120 2452 2409 2366 2321 2274 2227 2177 2127 2074 2019 1962 1903

Normal 0 125 2099 2057 2014 1970 1925 1879 1832 1784 1735 1684 1632 1578Emerg 2.533 125 2493 2452 2409 2366 2321 2275 2227 2178 2127 2075 2020 1964

Normal 0 130 2141 2100 2058 2015 1972 1927 1882 1836 1788 1739 1688 1636Emerg 2.533 130 2533 2493 2452 2409 2366 2321 2275 2228 2179 2129 2076 2022

Normal 0 140 2222 2183 2143 2103 2062 2020 1978 1934 1889 1843 1796 1748Emerg 2.533 140 2610 2572 2534 2494 2453 2411 2368 2324 2278 2231 2183 2133

Normal 0 150 2300 2263 2226 2187 2149 2109 2069 2028 1986 1943 1899 1853Emerg 2.533 150 2685 2649 2613 2575 2537 2497 2457 2415 2372 2328 2283 2236

Normal 0 160 2376 2341 2305 2269 2232 2195 2156 2118 2078 2037 1996 1953Emerg 2.533 160 2758 2723 2689 2653 2617 2580 2541 2502 2462 2421 2378 2335

Normal 0 170 2451 2417 2383 2348 2313 2277 2241 2204 2167 2128 2089 2049Emerg 2.533 170 2828 2796 2763 2729 2694 2659 2623 2586 2548 2509 2469 2428

Normal 0 180 2523 2491 2458 2425 2392 2358 2323 2288 2252 2216 2179 2141Emerg 2.533 180 2897 2866 2835 2802 2770 2736 2702 2667 2631 2594 2557 2518


1590 45/7 ACSR - Lapwing Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2000 1954 1907 1859 1810 1760 1708 1655 1601 1544 1486 1425Emerg 2.533 100 2382 2336 2288 2239 2188 2135 2081 2024 1966 1904 1841 1774

Normal 0 110 2084 2040 1996 1951 1905 1858 1810 1760 1709 1657 1603 1547Emerg 2.533 110 2465 2421 2376 2330 2283 2234 2183 2131 2077 2021 1963 1902

Normal 0 120 2164 2123 2081 2039 1995 1951 1905 1859 1811 1763 1712 1661Emerg 2.533 120 2544 2503 2460 2417 2373 2327 2280 2231 2181 2129 2076 2020

Normal 0 125 2204 2163 2123 2081 2039 1996 1952 1907 1860 1813 1765 1715Emerg 2.533 125 2582 2542 2501 2459 2416 2372 2326 2279 2231 2181 2129 2075

Normal 0 130 2242 2203 2163 2123 2082 2040 1997 1953 1908 1862 1815 1767Emerg 2.533 130 2619 2580 2541 2500 2458 2415 2371 2326 2279 2231 2181 2129

Normal 0 140 2317 2280 2242 2204 2165 2125 2084 2043 2001 1958 1913 1868Emerg 2.533 140 2692 2655 2618 2579 2540 2500 2458 2415 2372 2326 2280 2232

Normal 0 150 2390 2355 2319 2282 2245 2207 2169 2129 2089 2049 2007 1964Emerg 2.533 150 2763 2728 2692 2656 2619 2580 2541 2501 2460 2417 2374 2329

Normal 0 160 2462 2428 2393 2358 2323 2287 2250 2213 2175 2136 2097 2056Emerg 2.533 160 2831 2798 2764 2730 2694 2658 2621 2583 2544 2505 2464 2421

Normal 0 170 2531 2499 2466 2432 2398 2364 2329 2294 2257 2221 2183 2145Emerg 2.533 170 2898 2867 2835 2802 2768 2734 2699 2663 2626 2588 2550 2510

Normal 0 180 2600 2568 2537 2505 2472 2440 2406 2372 2338 2303 2267 2231Emerg 2.533 180 2964 2934 2903 2872 2840 2807 2774 2740 2705 2669 2632 2595


169

1590 54/19 ACSR - Falcon Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 1880 1831 1780 1729 1676 1621 1565 1506 1446 1383 1317 1248Emerg 2.533 100 2278 2229 2179 2127 2074 2018 1960 1900 1838 1772 1704 1631

Normal 0 110 1970 1924 1877 1829 1779 1729 1677 1623 1568 1510 1451 1389Emerg 2.533 110 2363 2318 2271 2223 2174 2122 2069 2014 1957 1898 1836 1771

Normal 0 120 2055 2012 1968 1923 1877 1829 1781 1731 1680 1627 1573 1517Emerg 2.533 120 2444 2402 2358 2313 2267 2220 2171 2120 2067 2013 1956 1897

Normal 0 125 2097 2054 2012 1968 1923 1877 1831 1783 1733 1683 1630 1576Emerg 2.533 125 2483 2442 2400 2357 2312 2266 2219 2170 2119 2067 2013 1956

Normal 0 130 2137 2096 2054 2012 1968 1924 1879 1833 1785 1736 1686 1634Emerg 2.533 130 2521 2482 2441 2399 2355 2311 2265 2218 2170 2119 2067 2013

Normal 0 140 2215 2176 2137 2097 2056 2014 1972 1928 1884 1838 1791 1743Emerg 2.533 140 2595 2558 2519 2480 2439 2398 2355 2311 2266 2219 2171 2121

Normal 0 150 2291 2254 2216 2178 2140 2100 2060 2019 1978 1935 1891 1846Emerg 2.533 150 2667 2631 2595 2557 2519 2480 2440 2399 2356 2313 2268 2221

Normal 0 160 2364 2329 2293 2257 2220 2183 2145 2106 2067 2027 1986 1943Emerg 2.533 160 2736 2702 2667 2632 2596 2559 2521 2483 2443 2402 2360 2316

Normal 0 170 2435 2401 2367 2333 2298 2263 2227 2190 2153 2115 2076 2036Emerg 2.533 170 2802 2770 2738 2704 2670 2635 2600 2563 2526 2487 2448 2407

Normal 0 180 2504 2472 2440 2407 2374 2340 2306 2271 2236 2200 2163 2125Emerg 2.533 180 2868 2837 2806 2775 2742 2709 2675 2641 2605 2569 2532 2493


1590 54/19 ACSR - Falcon Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2005 1959 1912 1864 1815 1765 1714 1660 1606 1549 1491 1430Emerg 2.533 100 2382 2336 2288 2239 2188 2136 2081 2025 1966 1905 1841 1774

Normal 0 110 2086 2043 1999 1954 1908 1860 1812 1763 1712 1660 1606 1550Emerg 2.533 110 2461 2418 2373 2327 2280 2231 2181 2129 2075 2019 1960 1900

Normal 0 120 2164 2123 2081 2038 1995 1951 1905 1859 1812 1763 1713 1661Emerg 2.533 120 2536 2495 2454 2410 2366 2321 2274 2225 2176 2124 2070 2015

Normal 0 125 2202 2162 2121 2079 2037 1994 1950 1905 1859 1812 1764 1714Emerg 2.533 125 2573 2533 2492 2451 2408 2364 2318 2272 2223 2174 2122 2069

Normal 0 130 2239 2200 2160 2120 2079 2037 1994 1950 1906 1860 1813 1765Emerg 2.533 130 2608 2570 2530 2490 2448 2406 2362 2317 2270 2222 2172 2121

Normal 0 140 2311 2274 2236 2198 2159 2119 2079 2037 1995 1952 1908 1863Emerg 2.533 140 2677 2641 2604 2566 2526 2486 2445 2403 2359 2314 2268 2220

Normal 0 150 2381 2345 2309 2273 2236 2198 2160 2121 2081 2041 1999 1957Emerg 2.533 150 2744 2710 2675 2638 2601 2564 2525 2485 2444 2402 2359 2314

Normal 0 160 2449 2415 2381 2346 2311 2275 2239 2202 2164 2125 2086 2046Emerg 2.533 160 2809 2777 2743 2709 2674 2638 2601 2564 2525 2486 2445 2403

Normal 0 170 2515 2483 2450 2417 2383 2349 2315 2279 2244 2207 2170 2132Emerg 2.533 170 2873 2842 2810 2777 2744 2710 2675 2640 2603 2566 2528 2488

Normal 0 180 2581 2550 2518 2487 2454 2422 2389 2355 2321 2286 2251 2215Emerg 2.533 180 2935 2905 2875 2844 2812 2780 2747 2713 2679 2643 2607 2570


170

1780 84/19 ACSR - Chukar Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2034 1981 1926 1871 1813 1754 1693 1630 1565 1497 1425 1350Emerg 2.533 100 2455 2403 2349 2293 2235 2175 2113 2048 1981 1910 1836 1758

Normal 0 110 2136 2086 2035 1983 1930 1875 1819 1760 1700 1638 1574 1506Emerg 2.533 110 2553 2504 2454 2402 2348 2293 2236 2176 2115 2051 1984 1913

Normal 0 120 2234 2187 2139 2090 2040 1988 1936 1882 1826 1769 1710 1649Emerg 2.533 120 2646 2600 2553 2505 2455 2403 2350 2295 2239 2180 2118 2054

Normal 0 125 2281 2235 2188 2141 2092 2043 1992 1940 1886 1831 1774 1715Emerg 2.533 125 2691 2647 2601 2554 2506 2456 2405 2352 2297 2241 2182 2121

Normal 0 130 2327 2282 2237 2191 2144 2096 2046 1996 1944 1891 1836 1780Emerg 2.533 130 2736 2692 2648 2602 2556 2508 2458 2407 2354 2300 2243 2185

Normal 0 140 2417 2374 2331 2288 2243 2198 2152 2104 2056 2006 1955 1902Emerg 2.533 140 2821 2780 2739 2696 2652 2607 2560 2512 2463 2413 2360 2306

Normal 0 150 2504 2463 2423 2381 2339 2296 2252 2208 2162 2115 2067 2018Emerg 2.533 150 2904 2865 2826 2785 2744 2701 2658 2613 2567 2519 2470 2420

Normal 0 160 2588 2549 2511 2471 2431 2390 2349 2307 2264 2219 2174 2128Emerg 2.533 160 2984 2948 2910 2872 2833 2792 2751 2709 2666 2621 2575 2528

Normal 0 170 2670 2633 2596 2559 2521 2482 2442 2402 2361 2320 2277 2234Emerg 2.533 170 3063 3028 2992 2956 2918 2880 2841 2801 2761 2719 2675 2631

Normal 0 180 2750 2715 2680 2644 2607 2571 2533 2495 2456 2416 2376 2335Emerg 2.533 180 3139 3106 3072 3037 3002 2966 2929 2891 2852 2812 2772 2730


1780 84/19 ACSR - Chukar Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2171 2121 2070 2018 1965 1911 1855 1798 1739 1678 1614 1549Emerg 2.533 100 2570 2520 2468 2415 2360 2304 2245 2184 2121 2055 1986 1914

Normal 0 110 2263 2216 2168 2120 2070 2019 1966 1913 1858 1801 1743 1682Emerg 2.533 110 2661 2614 2565 2516 2465 2412 2358 2301 2243 2183 2120 2054

Normal 0 120 2353 2308 2262 2216 2169 2121 2072 2022 1970 1917 1862 1806Emerg 2.533 120 2747 2703 2658 2611 2564 2514 2464 2411 2357 2301 2243 2183

Normal 0 125 2396 2352 2308 2263 2217 2170 2123 2074 2024 1973 1920 1866Emerg 2.533 125 2790 2747 2703 2657 2611 2563 2514 2464 2412 2358 2302 2244

Normal 0 130 2438 2396 2353 2309 2264 2219 2172 2125 2076 2027 1976 1923Emerg 2.533 130 2831 2789 2746 2703 2658 2611 2564 2515 2465 2412 2359 2303

Normal 0 140 2522 2481 2440 2398 2356 2313 2269 2224 2178 2131 2083 2034Emerg 2.533 140 2912 2872 2832 2790 2748 2704 2660 2614 2566 2518 2467 2416

Normal 0 150 2603 2564 2525 2485 2445 2404 2362 2319 2276 2231 2186 2140Emerg 2.533 150 2990 2952 2914 2875 2835 2793 2751 2708 2663 2618 2571 2522

Normal 0 160 2681 2645 2607 2569 2531 2492 2452 2411 2370 2328 2285 2241Emerg 2.533 160 3066 3030 2994 2957 2918 2879 2840 2799 2757 2714 2669 2624

Normal 0 170 2759 2723 2688 2651 2614 2577 2539 2501 2461 2421 2381 2339Emerg 2.533 170 3140 3106 3072 3036 3000 2963 2925 2886 2847 2806 2764 2721

Normal 0 180 2835 2801 2766 2732 2696 2661 2624 2588 2550 2512 2473 2434Emerg 2.533 180 3213 3181 3148 3114 3079 3044 3008 2971 2934 2895 2856 2815


171

2167 72/7 ACSR - Kiwi Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2279 2219 2158 2096 2032 1966 1897 1827 1753 1677 1597 1513Emerg 2.533 100 2727 2669 2609 2547 2483 2416 2347 2275 2200 2122 2039 1952

Normal 0 110 2395 2340 2283 2224 2164 2103 2040 1975 1908 1838 1765 1690Emerg 2.533 110 2839 2785 2729 2671 2612 2550 2487 2421 2352 2281 2206 2128

Normal 0 120 2507 2454 2400 2346 2290 2232 2173 2113 2051 1986 1920 1851Emerg 2.533 120 2946 2895 2842 2789 2733 2676 2617 2556 2493 2427 2359 2288

Normal 0 125 2561 2510 2457 2404 2350 2294 2237 2179 2119 2057 1993 1927Emerg 2.533 125 2997 2948 2897 2845 2791 2736 2679 2620 2559 2496 2431 2363

Normal 0 130 2614 2564 2513 2461 2409 2355 2299 2243 2185 2125 2064 2000Emerg 2.533 130 3048 3000 2951 2900 2848 2795 2740 2683 2624 2563 2500 2435

Normal 0 140 2717 2669 2621 2572 2522 2472 2420 2366 2312 2256 2199 2140Emerg 2.533 140 3146 3101 3055 3007 2958 2908 2856 2803 2748 2692 2633 2573

Normal 0 150 2816 2771 2726 2679 2632 2584 2535 2484 2433 2381 2327 2272Emerg 2.533 150 3242 3199 3155 3110 3064 3016 2968 2918 2866 2814 2759 2703

Normal 0 160 2913 2870 2827 2783 2738 2692 2645 2598 2550 2500 2450 2398Emerg 2.533 160 3334 3293 3252 3209 3165 3121 3075 3028 2979 2930 2879 2826

Normal 0 170 3008 2967 2925 2883 2840 2797 2753 2707 2662 2615 2567 2518Emerg 2.533 170 3424 3385 3346 3305 3264 3222 3178 3134 3088 3041 2993 2944

Normal 0 180 3100 3061 3021 2981 2940 2899 2857 2814 2770 2726 2680 2634Emerg 2.533 180 3513 3476 3438 3399 3360 3320 3278 3236 3193 3149 3104 3057


2167 72/7 ACSR - Kiwi Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2434 2378 2322 2264 2205 2144 2081 2017 1951 1883 1812 1738Emerg 2.533 100 2858 2803 2746 2687 2626 2563 2498 2431 2361 2288 2211 2131

Normal 0 110 2540 2487 2434 2379 2323 2266 2208 2148 2086 2023 1957 1889Emerg 2.533 110 2962 2910 2857 2802 2745 2687 2626 2564 2499 2432 2362 2289

Normal 0 120 2642 2592 2541 2490 2437 2383 2328 2272 2214 2154 2093 2031Emerg 2.533 120 3062 3013 2962 2911 2858 2803 2747 2689 2628 2566 2502 2435

Normal 0 125 2692 2643 2593 2543 2492 2439 2386 2331 2275 2218 2159 2098Emerg 2.533 125 3110 3062 3014 2963 2912 2859 2804 2748 2690 2630 2568 2504

Normal 0 130 2741 2693 2645 2596 2546 2495 2443 2390 2335 2279 2222 2164Emerg 2.533 130 3157 3111 3064 3015 2965 2914 2861 2807 2750 2693 2633 2571

Normal 0 140 2836 2791 2745 2698 2651 2602 2553 2503 2451 2399 2345 2290Emerg 2.533 140 3250 3206 3161 3115 3068 3020 2970 2919 2866 2812 2756 2699

Normal 0 150 2929 2886 2842 2797 2752 2706 2659 2612 2563 2513 2462 2410Emerg 2.533 150 3340 3298 3256 3212 3168 3122 3075 3027 2977 2926 2874 2820

Normal 0 160 3020 2979 2937 2894 2851 2807 2763 2717 2671 2624 2576 2526Emerg 2.533 160 3428 3388 3348 3306 3264 3221 3176 3131 3084 3036 2987 2936

Normal 0 170 3109 3069 3029 2989 2947 2905 2863 2820 2776 2731 2685 2638Emerg 2.533 170 3514 3476 3437 3398 3358 3316 3274 3231 3187 3142 3095 3047

Normal 0 180 3197 3159 3120 3081 3042 3001 2961 2919 2877 2835 2791 2747Emerg 2.533 180 3598 3562 3525 3487 3449 3410 3370 3329 3287 3244 3200 3154


172


Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2405 2343 2279 2213 2145 2075 2003 1929 1851 1771 1686 1598Emerg 2.533 100 2864 2803 2740 2675 2608 2538 2466 2390 2311 2228 2142 2050

Normal 0 110 2528 2470 2409 2348 2285 2220 2153 2085 2014 1940 1864 1784Emerg 2.533 110 2982 2925 2866 2806 2743 2679 2612 2543 2470 2395 2317 2235

Normal 0 120 2646 2590 2533 2476 2417 2356 2294 2230 2165 2097 2027 1954Emerg 2.533 120 3094 3040 2985 2929 2870 2810 2749 2684 2618 2549 2477 2403

Normal 0 125 2702 2648 2593 2537 2480 2421 2361 2300 2236 2171 2104 2034Emerg 2.533 125 3148 3096 3043 2988 2932 2874 2814 2752 2688 2622 2553 2482

Normal 0 130 2758 2705 2652 2597 2542 2485 2427 2367 2306 2243 2178 2112Emerg 2.533 130 3201 3150 3099 3046 2991 2935 2877 2818 2756 2692 2626 2558

Normal 0 140 2866 2816 2766 2714 2662 2608 2553 2497 2440 2381 2321 2259Emerg 2.533 140 3304 3256 3208 3158 3106 3054 3000 2944 2886 2827 2766 2702

Normal 0 150 2971 2924 2875 2826 2777 2726 2674 2622 2568 2512 2456 2398Emerg 2.533 150 3404 3359 3313 3265 3217 3167 3117 3064 3010 2955 2898 2839

Normal 0 160 3073 3028 2982 2935 2888 2840 2791 2741 2690 2638 2585 2530Emerg 2.533 160 3501 3458 3414 3369 3324 3277 3229 3180 3129 3077 3023 2968

Normal 0 170 3172 3129 3085 3041 2996 2950 2903 2856 2808 2759 2708 2657Emerg 2.533 170 3595 3554 3513 3471 3427 3383 3337 3291 3243 3194 3144 3092

Normal 0 180 3269 3228 3186 3144 3101 3057 3013 2968 2922 2875 2827 2779Emerg 2.533 180 3687 3649 3609 3569 3528 3486 3443 3398 3353 3307 3259 3210



Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2571 2512 2453 2392 2329 2265 2199 2132 2062 1990 1915 1837Emerg 2.533 100 3005 2946 2887 2825 2761 2695 2627 2556 2483 2406 2326 2242

Normal 0 110 2682 2627 2570 2513 2454 2394 2332 2269 2204 2137 2068 1996Emerg 2.533 110 3113 3059 3003 2945 2886 2824 2761 2696 2628 2557 2484 2407

Normal 0 120 2789 2737 2683 2629 2573 2517 2459 2399 2338 2276 2211 2145Emerg 2.533 120 3217 3166 3113 3059 3004 2946 2887 2826 2763 2698 2630 2560

Normal 0 125 2842 2790 2738 2685 2631 2576 2519 2462 2403 2342 2280 2216Emerg 2.533 125 3268 3218 3167 3114 3060 3005 2948 2889 2828 2765 2700 2633

Normal 0 130 2893 2843 2792 2740 2688 2634 2579 2523 2466 2407 2347 2285Emerg 2.533 130 3318 3269 3219 3168 3116 3062 3007 2950 2891 2830 2768 2703

Normal 0 140 2993 2946 2897 2848 2798 2747 2695 2642 2588 2533 2476 2418Emerg 2.533 140 3415 3369 3322 3273 3224 3173 3121 3068 3013 2956 2897 2837

Normal 0 150 3091 3045 2999 2952 2905 2856 2807 2757 2705 2653 2600 2545Emerg 2.533 150 3509 3465 3420 3375 3328 3280 3231 3181 3129 3076 3021 2964

Normal 0 160 3186 3143 3099 3054 3008 2962 2915 2867 2819 2769 2718 2667Emerg 2.533 160 3601 3559 3517 3473 3429 3384 3337 3289 3240 3190 3139 3085

Normal 0 170 3280 3238 3196 3153 3109 3065 3021 2975 2929 2882 2833 2784Emerg 2.533 170 3690 3651 3610 3569 3527 3484 3440 3395 3348 3301 3252 3202

Normal 0 180 3371 3331 3291 3250 3208 3166 3123 3080 3036 2991 2945 2898Emerg 2.533 180 3778 3741 3702 3663 3623 3582 3540 3497 3453 3408 3362 3315


173

2493 54/37 ACAR Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2406 2344 2279 2213 2146 2076 2004 1929 1852 1771 1687 1598Emerg 2.533 100 2865 2804 2741 2676 2609 2539 2466 2391 2312 2229 2142 2051

Normal 0 110 2533 2474 2413 2352 2289 2224 2157 2088 2017 1944 1867 1787Emerg 2.533 110 2987 2930 2871 2810 2748 2683 2616 2547 2474 2399 2321 2238

Normal 0 120 2653 2597 2541 2483 2424 2363 2301 2237 2171 2103 2033 1960Emerg 2.533 120 3102 3049 2994 2937 2879 2819 2756 2692 2626 2556 2485 2410

Normal 0 125 2712 2658 2602 2546 2489 2430 2370 2308 2244 2179 2111 2041Emerg 2.533 125 3159 3107 3053 2998 2942 2884 2824 2762 2697 2631 2562 2490

Normal 0 130 2769 2716 2663 2608 2552 2495 2437 2377 2315 2252 2187 2120Emerg 2.533 130 3214 3163 3111 3058 3003 2947 2889 2829 2767 2703 2637 2568

Normal 0 140 2881 2831 2780 2728 2675 2621 2566 2510 2453 2394 2333 2270Emerg 2.533 140 3321 3273 3224 3174 3123 3070 3015 2959 2901 2842 2780 2716

Normal 0 150 2990 2942 2893 2844 2794 2743 2691 2638 2584 2528 2471 2413Emerg 2.533 150 3425 3380 3333 3286 3237 3187 3136 3083 3029 2973 2916 2857

Normal 0 160 3095 3050 3003 2957 2909 2860 2811 2761 2710 2657 2603 2548Emerg 2.533 160 3526 3483 3439 3394 3348 3301 3252 3203 3152 3099 3045 2990

Normal 0 170 3198 3155 3111 3066 3021 2974 2927 2880 2831 2781 2731 2679Emerg 2.533 170 3625 3584 3542 3499 3456 3411 3365 3318 3270 3220 3170 3117

Normal 0 180 3299 3258 3215 3173 3129 3085 3041 2995 2949 2902 2854 2804Emerg 2.533 180 3721 3682 3643 3602 3560 3518 3474 3430 3384 3337 3289 3240


2493 54/37 ACAR Planning Rating Winter Planning Rating Summer

Rating Condition

Wind Speed (ft/sec)

Condr Max

Temp Deg C -15 -10 -5 0 5 10 15 20 25 30 35 40

Normal 0 100 2572 2513 2453 2392 2330 2266 2200 2132 2062 1990 1916 1838Emerg 2.533 100 3006 2947 2888 2826 2762 2696 2628 2557 2484 2407 2327 2242

Normal 0 110 2687 2631 2575 2517 2458 2398 2336 2273 2208 2141 2071 2000Emerg 2.533 110 3118 3064 3008 2950 2890 2829 2766 2700 2632 2561 2488 2411

Normal 0 120 2797 2745 2691 2636 2581 2524 2466 2406 2345 2282 2218 2151Emerg 2.533 120 3227 3175 3122 3068 3012 2955 2895 2834 2771 2706 2638 2568

Normal 0 125 2851 2800 2748 2694 2640 2585 2528 2470 2411 2350 2288 2224Emerg 2.533 125 3279 3229 3178 3125 3071 3015 2958 2899 2838 2775 2709 2642

Normal 0 130 2905 2854 2803 2751 2699 2645 2590 2533 2476 2417 2356 2294Emerg 2.533 130 3331 3282 3232 3181 3129 3075 3019 2962 2903 2842 2779 2714

Normal 0 140 3009 2961 2912 2863 2812 2761 2709 2656 2601 2546 2489 2430Emerg 2.533 140 3432 3386 3339 3290 3241 3190 3137 3084 3028 2971 2912 2851

Normal 0 150 3110 3064 3018 2971 2923 2874 2824 2774 2722 2670 2616 2561Emerg 2.533 150 3531 3487 3442 3396 3349 3301 3251 3201 3148 3095 3039 2983

Normal 0 160 3209 3166 3121 3076 3030 2984 2936 2888 2839 2789 2738 2686Emerg 2.533 160 3627 3585 3542 3499 3454 3408 3361 3313 3264 3213 3161 3108

Normal 0 170 3307 3265 3222 3179 3135 3091 3046 3000 2953 2905 2857 2807Emerg 2.533 170 3721 3681 3640 3599 3556 3513 3468 3423 3376 3328 3279 3229

Normal 0 180 3403 3362 3321 3280 3238 3195 3152 3108 3064 3018 2972 2925Emerg 2.533 180 3813 3775 3736 3697 3656 3615 3572 3529 3485 3439 3393 3345


174

Appendix 7 Conductor Rating Calculation

Program File (EXCEL Spreadsheet)

20020117 Bare Overhead Trans

Documents

Transcript of 20020117 Bare Overhead Trans