R.8 INTRODUCTION Capacitors, banks and M.V. …ksafelectric.com/pdf/circutor/r8_gb.pdf ·...

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Medium Voltage Power Factor Correction 3

Power quality, voltage level 3

Improving the operating cost of an installation 4

Example of loss reduction for Joule effect in a distribution system using aerial lines 5

Where is power factor in M.V. corrected? 7

M.V. Capacitor banks 8

Setting 8

Form of correction 9

Protection devices 10

Components of a capacitor bank

Capacitors, CHV type 11

Shock reactors, RMV type 16

Vacuum contactor, LVC type 17

How the components are chosen? 18

Capacitor banks, CIRKAP type 19

Ideal applications 19

CIRKAP-C, fi x or automatic banks in a cabinet 20

CMF, fi x bank assembled in a cabinet 21

CMA, automatic bank assembled in a cabinet 22

GP, high power bank assembled in a cabinet 23

CMFR, bank with fi lters assembled in a cabinet 23

CIRKAP-B, banks 24

BMF, fi x bank assembled in frame 24

BMFR, bank with fi lters assembled in frame 25

BAF, bank for high voltage in a frame (52...123 kV) 25

How to select a capacitor bank 26

Guide to defi ne parts and equipment 27

Example of a bank calculation 28

Dimensions 30

INTRODUCTION

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Medium voltage power factor correction

M.V. power factor correction is directly related to the technical management of transmission and distribution networks. The benefi ts:•Power quality. Increasing voltage levels in busbar sets in substations and at the end of lines.•Improving the operating cost of an installation. Decreasing reactive power and therefore reducing apparent power with two highly relevant technical aspects:- Reducing losses- Increasing the performance of transformers and installations•Reducing the fi nancial cost of energy.

Each of the points is fully detailed in the following sections.

Power quality, voltage level

There are two possible situations: controlling voltage in substations busbars and at the end of M.V. distribution lines.

• Controlling voltage at the end of M.V. distribution lines

If M.V. lines are very long, it is very likely that voltage in distribution centres is decreased by the effect of the conducting cable itself.This is particularly important in areas of rural distribution or where the consumers are widely dispersed.

Connecting banks at the end of a line will decrease voltage drop losses in the cables.

• Controlling voltage in substations busbars

One of the most critical points in the distribution of electrical energy is maintaining voltage at the end of lines.The most usual criterion is maintaining M.V. voltage above its nominal value.

To do so, M.V. capacitor banks are used. In fact, a voltage increase may appear by connecting capacitor banks at those points where they are connected.

The IEC 60871-1 standard gives the formula for calculating the voltage increase (see table at the bottom of the page). It depends on the characteristics of the system where the bank is connected.

Power, type of power equipment and the level of fractionation of capacitor banks, depend on the of the utilities’ own criteria.

However, the fractionation of the total power in different steps allows voltage levels to be improved under different load conditions in the substation. This avoids excessive capacitive energy in the system.

Voltage increase on connecting IEC 60871-1 capacitors

Voltage drops in lines

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Improving the operating cost of an installation

Generation, transmission and distribution of energy are responsible for a signifi cant degree of energy losses.Basically, these losses may be divided into:

Losses in generation stations and M.V./H.V. substations.Losses in transmission systems.Losses in H.V./M.V. substations. Losses in distribution lines.

Losses in the M.V. distribution lines, and systems are more fully explained below.

Reducing loss levels in M.V. lines.

A very good way for decreasing losses in an M.V. distribution lines is the installation of capacitor banks.

In fact, the installation of a capacitor bank decreases reactive and apparent power (Q system) in the system.

Therefore, because of the direct relation between power and current, the level of active losses due to the Joule effect will decrease.

The following table shows the formula for calculating Joule losses, reactive energy consumption in the cable and the resulting losses after the connection of a capacitor bank.

••••

This point is very important when evaluating the fi nancial performance of the installation, given that the known payment for reactive energy has a hidden cost of active energy dissipated in distribution.

Joule losses in a line

Reactive consumption in a line

Decrease in losses on connecting a capacitor bank

Discharging lines and cables

The decrease in apparent powers after connecting a capacitor bank has two immediate consequences:

The decrease of the load to be distributed by the system.The increase of the supply capacity of the transformers.The increase of voltage at the end of a line.

•••

Units used for calculation formula:P active power transported by the line in kWQ is the reactive absorbed power without

a capacitor bank in kV·AQc power of the capacitor banks in MV·AI currentU system voltage in kVR1 resistance of the cable in Ω/kmX1 reactance of the cable in Ω/kmL length of the line in kmSCC short circuit power at the connection point in MV·A

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Example of reducing Joule losses in distribution lines using aerial lines

In this case, the change in line losses and voltage drops in a 20 kV distribution lines with and without the connection of capacitor banks is studied.

The example shows the effect of capacitor banks in aerial M.V. distribution lines in a rural area with two distribution centres A and B.

As may be seen, at electrical system connection point C, the connection conditions are not good, i.e. the volume of apparent power is high and the power factor is low.

Situation with banks connected

In order to improve the conditions of the system, an 1 100 kvar bank is connected at distribution centre A (CBA). Another 2 000 kvar bank at 20 kV is connected at distribution centre B (CBB).

The balance of powers is modifi ed as shown in the following table:

Load conditions without capacitor banks connected

The power conditions in the system are shown in the following table:

Connection point C Distribution centre A Distribution centre B

Active power (MW) 7,39 2,7 4,39

Reactive power (Mvar) 3,70 1,23 2,13

Apparent power (MV·A) 8,26 2,97 4,88

Cos ϕ 0,89 0,91 0,9

Joule Losses (kW) - 114,5 185

Reactive consumed by the line (kvar) - 129 208

Voltage drops (%) - 5,2 5,25

Connection point C Distribution centre A with CBA

Distribution centre B with CBB

Active power (MW) 7,33 2,7 4,39

Reactive power (Mvar) 0,54 0,13 0,13

Apparent power (MV·A) 7,36 2,7 4,39

Cos ϕ 0,99 0,99 0,99

Joule Losses (kW) - 94 150

Reactive consumed by the line (kvar) - 106 170

Voltage drops (%) - 3,9 3,8

Active power saving (kW) - 20 35

In this case, it can be seen that in C the conditions have been substantially optimized. Also, losses have been decreased throughout the lines and voltage levels have increased in distribution centres.

In this way, the operation and performance of the lines have been optimized and the voltage level for users has been guaranteed.

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Conclusions

Capacitor banks are essential for the correct technical and fi nancial management of the electrical distribution systems.

Technical optimization

Voltage control throughout the transmission and distribution systems

Discharges lines and transformersReduces loss levels in the whole

system

Financial optimization

Reduces energy costs by decreasing consumed reactive energy

Reduces hidden costs of Joule losses in transport and distribution lines

Gives improved economic effi ciency in installations

•

••

•

•

•

M.V. electrical energy distribution system

Power quality Optimizing system operating costs

Capacitors banksCIRKAP

Electrical load management in distribution systems

Financial optimization

Voltage increase in:- Busbar sets- End of the lines

- Decrease in losses- Line and cable discharges- Transformer discharges

Decrease in energy cost:- lower kW consumption- lower kvar consumption

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Where is power factor in M.V. corrected?

Electrical energy generating, transmission and distribution installations

As previously stated, transmission and distribution of reactive energy throughout the electrical system is considerable. The solution is to correct reactive energy at certain points in the electrical system. These points are:

Generating stations: Such as low power hydro-electric stations and wind generating parks.Receiving/distributing substations. (i.e. receiving 400 kV, distributing at 20 kV).Distribution centres.

•••

Industrial installations with distribution and power consumption in M.V.

As a general rule, installations distributing and consuming M.V. energy are likely to be corrected.

Examples of these installations are:Pumping stations.Mining.Heavy industry such as cement companies, chemical plants, steelworks, etc.

In all of these, there are transformers, asynchronous motors or electrical arc equipment consuming a large amount of reactive energy.

•••

Installations with distribution in M.V. and power consumption in L.V.

In installations receiving M.V. with distribution and power consumption in L.V., correction always has to be made in Low Voltage. The reasons for this are:

More economical low power in L.V.More accurate regulation

However, if the amount of M.V. / L.V. transformers is high, it is recommended that L.V. regulated banks with one fi xed M.V. section are installed.

••

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CAPACITOR BANKS SETTING

M.V. CAPACITOR BANKS

It is usual to use different settings for M.V. banks. These depend on the type of capacitor used and above all on the installation’s electrical parameters.

THREE-PHASE CAPACITOR BANKS

This equipment is very useful for industrial installations because they are capable of housing small and medium sized powers within a very small space.

Maximum service voltage is 11 kV and maximum power is 1.4 MVar.

The most usual applications are:

Correction of motors.Correction of transformers. Automatic banks.

•••

SINGLE-PHASE CAPACITORS BANKS CONNECTED IN DOUBLE STAR

This setting is used most in medium and high powers.

The double star is formed by two stars joined by a common neutral.A current transformer is connected in neutral to detect faulty capacitor currents.

This layout of the capacitors allows equipment to be made regardless of the voltage level and power required based on standard capacitors.

As shown by the diagram, the capacitor or group of capacitors in each branch will have an applied voltage corresponding to the phase voltage.

Once the voltage in each capacitor has been defined and therefore the number of units plus the power for each capacitor are defi ned.

Normally this setting is used in:

Systems with service voltages above 11 kV.Systems with voltages less than 11 kV and powers above 1.6 MVar.

••

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SINGLE-PHASE CAPACITORS BANKS CONNECTED IN STAR

The application of this setting is only reserved for low bank powers given that the operating voltage level cannot by resolved using three-phase capacitors.

A practical example of this is a 450 kvar at 15 kV bank.This will be resolved with 3 x 150 kvar capacitors at 8.67 kV rated voltage.

The insulation level of the capacitors corresponds to the system, i.e., 17.5 kV.

FORM OF CORRECTION

As with L.V. installations, the form of correction in M.V. installations is fi xed or automatic. This depends on the type of installation, its setting, the load system it has and the purpose of installing the equipment.

Fix correction

Fixed correction equipment is installed when the levels of reactive power are high and a signifi cant part is more or less constant. Normally this happens in installations connected to high voltage systems and medium voltage distribution systems.

Another possibility is industrial installations where there are a small number of receivers and the operating systems mean that all machines do not operate at the same time.

Automatic correction

Installations with significant load variations require equipment tracking these fl uctuations to be installed.

An example would be a distribution node in a 6.3 kV industry with M.V. loads and L.V. transformers as shown in the diagram.

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PROTECTION OF M.V. CAPACITOR BANKS

INTERNAL PROTECTIONS

Internal protection protects equipment from possible faults in the capacitors. This protection is guaranteed by the internal fuses.

Banks set as a double star are combined using unbalance protection. This system is made up of a current transformer and an associated relay.

In the event of an internal fault in one of the capacitors, there is an unbalance current.

This current is detected by the current transformer. The associated relay gives the disconnection command to the operating equipment and/or protection

There are two types of protection for a MV capacitors (bank): internal and external

EXTERNAL PROTECTION

Protection to be used in the capacitor bank depends on the banks setting and its application

BANKS WITH 3 PHASE-CAPACITORS BANKS WITH DOUBLE STAR

Rated voltages ≤ 11 kVBank powers ≤ 1.4 MVar

Rated voltages > 11 kVBank powers > 1.4 MVar

Fixed for motor: High breaking power fuses (APR) with fuse display.

Automatic: APR fuses combined with contactor

Automatic switch with the following protection:- Overload and short circuit- Homopolar- Unbalance

Notes:- Overvoltage protection in the busbar set is advised.- Protection may be installed in the bank itself or in the M.V. cabinet centre.

GENERAL COMPONENT DESIGN CRITERIA

In accordance with the IEC 60871-1 standard, the capacitors are designed to support 30 % of permanent current overload.

For this reason, the standard advises that all components in the bank support a maximum of 1.43 times the rated current. This criterion is applied in:

Cable power.Equipment in general.Shock reactors.

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Basic concepts:

CHV Capacitors

Capacitor settings

Single-phaseCapacitor with two terminals.Construction of banks set as a star or double star.Normally for systems above 11 kV or for lower voltages banks with high power levels.

Three-phaseCapacitor with three terminals.Assembly of low and medium power banks in systems up to11 kV.

Composition of the capacitors

Medium Voltage capacitors CHV are made of different basic capacitive parts.

These basic units are connected in series and parallel groups to obtain the required power and voltage.

Once the parts package has been manufactured, the set is placed in a stainless steel box, porcelain terminals are added and impregnated with (biodegradable) oil, thereby guaranteeing the unit’s perfect insulation and operation.

Insulation levels (BIL) Maximum voltage which the material has to support in two possible scenarios according to the IEC standard:

At industrial frequency for 1 minute. Checking the unit’s insulation by simulating a high system voltage (kVef.)

On impulse, ray type (shock wave) of 1.2 / 50 µs. Checking the unit’s insulation simulating a ray discharge (kVpeak)

In three-phase capacitors, the insulation level corresponds to the level immediately above its rated voltage.Example: CHV-T three-phase 300 kvar, 6.6 kV capacitor. Insulation level 7.2 kV

In single-phase capacitors the selection criteria differ from the three-phase criteria. The insulation levels correspond to the system’s levels to which the non earthed equipment banks are connected (IEC 80.671-1).

Example: 3 MVar at 20 kV Bank. Formed by 6 x 500 kvar, 11.56 kV units. Insulation level of the capacitors 24 kV, (50/125 kV)

Earth leakage lines

Capacitor insulators’ surround.This is directly related to pollution levels.

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Insulation level (kV)

Voltage at industrial frequency (kVef.)

Shock wave (kVpeak)

Earth leakage

lines (mm)

7,2 20 60 190

12 28 75 190

17,5 38 95 300

24 50 125 435

36 70 170 600

Table 1

Components for M.V. banks

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Levels of pollution

Pollution levels are understood to mean environmental contamination in the location where the equipment is installed. Therefore in order to avoid insulation faults as a result of the environment, with a higher level of environmental pollution, a larger insulator leakage line is installed.

Expressed in mm / kV, i.e., the ratio between the insulator leakage line and the system voltage.

Defi ned pollution levels are indicated in the attached table

Classifi cation Level of pollution

Low 16 mm/kV

Medium 20 mm/kV

High 25 mm/kV

Very high 31 mm/kV

Operating advantages

Immediate disconnection of the damaged partMinimum generation of gases inside the capacitor, with

resulting insignifi cant internal over-pressure effectContinuity of service. Removal of the damaged unit

allows the equipment to remain connectedOption for planning bank maintenanceEasier maintenance

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Design advantages

Increased capacitor powerLess capacitors used by bankReduction in the size of frames or

cabinetsMore economical cost of the bank

•••

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FEATURES

Overload

In current 1,3 In permanent

In voltage 1,1 Un 12 h in 24 hours1,15 Un 30 min in 24 hours

1,2 Un 5 min in 24 hours1,25 Un 1 min in 24 hours

Environmental conditions

Operating temperature Category C (according to IEC 60871-1)

Maximum temperature (*2) 50º

Maximum average value over 24 hours 40º

Maximum average value over 1 year 30º

CHV-M CHV-T

Assembly features

Dielectric Corrugated polypropylene fi lm

Electrode Aluminium sheet

Impregnated oil SAS-40E or M/DBT (free of PCB)

Dimensions (mm) according to type

Weight según tipo (ver tabla)

Casing

Painted stainless steel RAL 7035There are 2 wings to attach it to the

frame and to avoid mechanical forces on the porcelain terminals

Fixing position Horizontal or vertical

Standards IEC 60871-1, IEC 60871-4

(*2) Puntual ocassions

CHV-M CHV-T

Voltage 1 ... 20 kV 1 ... 12 kV

Rated power 25 ... 600 kvar 25 ... 500 kvar

Frequency 50 / 60 Hz

Dielectric losses ≤ 0,2 W / kvar

Capacity tolerance -5% / +10 %

Location Indoor / Outdoor

Protection Internal fuse (according to type)

Discharge resistance (according to IEC 60871-1)

Location Indoor

Discharge time ≤ 10 minutes

Residual voltage ≤ 75 V

Insulators

Material Porcelain

Level of pollution 16 mm / kV(*)

Insulation level 12 - 17,5 - 24 - 36 kV (see table 1)

(*) Other leakage lines, on request

Capacitor protection using internal fuses

Like any other part in the electrical installation, the capacitor has to be able to remove faults which may occur internally. To do so, each and every basic capacitive part in the capacitor is protected by an internal fuse.

In the event of a fault in a basic capacitive part the correctly functioning part discharges in parallel on the breakdown. This discharge provokes an immediate breakage in the damaged internal fuse. This system has a series of advantages which fall into two groups:

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BIL: 28 / 75 kV - 6,6 kV (11 kV System)

kvar Type

50 Hz 60 Hz

Weight (kg) Dim. (mm)

Figure (page 30)Code Peso

(kg) Dim. (mm)Figure (page 30)

Code P B H P B H

50 CHV-M 50 / 6,6(*) 17 350x160x420 160 180 200 R80193 17 350x160x420 160 180 200 R80193001

75 CHV-M 75 / 6,6(*) 20 350x160x520 160 180 300 R80195 20 350x160x520 160 180 300 R80195001

100 CHV-M 100 / 6,6 22 350x160x520 160 180 300 R80196 22 350x160x520 160 180 300 R80196001

133 CHV-M 133 / 6,6 25 350x160x570 160 180 350 R80197 25 350x160x570 160 180 350 R80197001

150 CHV-M 150 / 6,6 28 350x160x630 160 180 410 R80198 26 350x160x570 160 180 350 R80198001

167 CHV-M 167 / 6,6 30 350x160x690 160 180 470 R80199 28 350x160x630 160 180 410 R80199001

200 CHV-M 200 / 6,6 34 350x160x690 160 180 470 R8019A 34 350x160x690 160 180 470 R8019A001

250 CHV-M 250 / 6,6 40 350x160x800 160 180 580 R8019B 40 350x160x800 160 180 580 R8019B001

300 CHV-M 300 / 6,6 46 350x160x890 160 180 670 R8019C 46 350x160x800 160 180 580 R8019C001

400 CHV-M 400 / 6,6 57 350x160x1090 160 180 870 R8019F 55 350x160x960 160 180 740 R8019F001

500 CHV-M 500 / 6,6 68 350x175x1000 175 180 780 R8019G 66 350x175x930 175 180 710 R8019G001

600 CHV-M 600 / 6,6 79 350x175x1140 175 180 920 R8019H 77 350x175x1000 175 180 780 R8019H001

BIL: 38 / 95 kV - 8 kV (13,2 kV System)

kvar Type

50 Hz 60 Hz


Figure (page 30)Code Weight


Code P B H P B H

50 CHV-M 50 / 8(*) 19 350x160x461 160 221 200 R801B3 19 350x160x461 160 221 200 R801B3001

75 CHV-M 75 / 8(*) 23 350x160x561 160 221 300 R801B5 23 350x160x561 160 221 300 R801B5001

100 CHV-M 100 / 8(*) 25 350x160x561 160 221 300 R801B6 25 350x160x561 160 221 300 R801B6001

133 CHV-M 133 / 8 28 350x160x671 160 221 410 R801B7 28 350x160x611 160 221 350 R801B7001

150 CHV-M 150 / 8 31 350x160x671 160 221 410 R801B8 31 350x160x611 160 221 350 R801B8001

167 CHV-M 167 / 8 33 350x160x731 160 221 470 R801B9 31 350x160x671 160 221 410 R801B9001

200 CHV-M 200 / 8 38 350x160x841 160 221 580 R801BA 36 350x160x731 160 221 470 R801BA001

250 CHV-M 250 / 8 43 350x160x931 160 221 670 R801BB 41 350x160x841 160 221 580 R801BB001

300 CHV-M 300 / 8 49 350x160x931 160 221 670 R801BC 49 350x160x931 160 221 670 R801BC001

400 CHV-M 400 / 8 61 350x160x1211 160 221 950 R801BF 59 350x160x1091 160 221 830 R801BF001

500 CHV-M 500 / 8 70 350x175x1041 175 221 780 R801BG 68 350x175x971 175 221 710 R801BG001

600 CHV-M 600 / 8 81 350x175x1181 175 221 920 R801BH 79 350x175x1041 175 221 780 R801BH001


kvar Type

50 Hz 60 Hz


Figure (page 30) Code Weight


Code P B H P B H

50 CHV-M 50 / 9,1(*) 19 350x160x420 160 221 200 R801D3 19 350x160x461 160 221 200 R801D3001

75 CHV-M 75 / 9,1(*) 23 350x160x520 160 221 300 R801D5 23 350x160x561 160 221 300 R801D5001

100 CHV-M 100 / 9,1(*) 25 350x160x520 160 221 300 R801D6 25 350x160x561 160 221 300 R801D6001

133 CHV-M 133 / 9,1(*) 28 350x160x570 160 221 350 R801D7 28 350x160x611 160 221 350 R801D7001

150 CHV-M 150 / 9,1 31 350x160x630 160 221 410 R801D8 31 350x160x611 160 221 350 R801D8001

167 CHV-M 167 / 9,1 33 350x160x630 160 221 410 R801D9 31 350x160x671 160 221 410 R801D9001

200 CHV-M 200 / 9,1 38 350x160x690 160 221 470 R801DA 36 350x160x671 160 221 410 R801DA001

250 CHV-M 250 / 9,1 43 350x160x800 160 221 580 R801DB 41 350x160x841 160 221 580 R801DB001

300 CHV-M 300 / 9,1 49 350x160x890 160 221 670 R801DC 49 350x160x931 160 221 580 R801DC001

400 CHV-M 400 / 9,1 61 350x160x1090 160 221 870 R801DF 59 350x160x1091 160 221 740 R801DF001

500 CHV-M 500 / 9,1 70 350x175x1000 175 221 780 R801DG 68 350x175x971 175 221 710 R801DG001

600 CHV-M 600 / 9,1 81 350x175x1140 175 221 920 R801DH 79 350x175x1041 175 221 780 R801DH001

CHV-M

(*) Without internal fuses



Single-phase capacitors

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kvar Type

50 Hz 60 Hz




CodeP B H P B H

50 CHV-M 50 / 12,1(*) 19 350x160x595 160 255 300 R801F3 19 350x160x495 160 255 200 R801F3001

75 CHV-M 75 / 12,1(*) 23 350x160x595 160 255 300 R801F5 23 350x160x595 160 255 300 R801F5001

100 CHV-M 100 / 12,1(*) 25 350x160x645 160 255 350 R801F6 25 350x160x595 160 255 300 R801F6001

133 CHV-M 133 / 12,1(*) 28 350x160x705 160 255 410 R801F7 28 350x160x595 160 255 300 R801F7001

150 CHV-M 150 / 12,1(*) 31 350x160x765 160 255 470 R801F8 31 350x160x705 160 255 410 R801F8001

167 CHV-M 167 / 12,1 33 350x160x765 160 255 470 R801F9 31 350x160x705 160 255 410 R801F9001

200 CHV-M 200 / 12,1 38 350x160x875 160 255 580 R801FA 36 350x160x765 160 255 470 R801FA001

250 CHV-M 250 / 12,1 43 350x160x965 160 255 670 R801FB 41 350x160x875 160 255 580 R801FB001

300 CHV-M 300 / 12,1 49 350x160x1035 160 255 740 R801FC 49 350x160x965 160 255 670 R801FC001

400 CHV-M 400 / 12,1 61 350x160x1245 160 255 950 R801FF 59 350x160x1125 160 255 830 R801FF001

500 CHV-M 500 / 12,1 70 350x175x1075 175 255 780 R801FG 68 350x175x1005 175 255 710 R801FG001

600 CHV-M 600 / 12,1 81 350x175x1215 175 255 920 R801FH 79 350x175x1075 175 255 780 R801FH001

BIL: 70/170 kV - 15,2 kV (25 kV System)

kvar Type

50 Hz 60 Hz




CodeP B H P B H

50 CHV-M 50 / 15,2(*) 19 350x145x510 145 300 170 R801H3 19 350x145x510 145 300 170 R801H3001

75 CHV-M 75 / 15,2(*) 23 350x145x590 145 300 250 R801H5 23 350x145x510 145 300 170 R801H5001

100 CHV-M 100 / 15,2(*) 25 350x145x590 145 300 250 R801H6 25 350x145x510 145 300 170 R801H6001

133 CHV-M 133 / 15,2(*) 28 350x145x670 145 300 330 R801H7 28 350x145x590 145 300 250 R801H7001

150 CHV-M 150 / 15,2(*) 31 350x145x670 145 300 330 R801H8 31 350x145x670 145 300 330 R801H8001

167 CHV-M 167 / 15,2(*) 33 350x145x760 145 300 420 R801H9 31 350x145x670 145 300 330 R801H9001

200 CHV-M 200 / 15,2(*) 38 350x145x760 145 300 420 R801HA 36 350x145x760 145 300 420 R801HA001

250 CHV-M 250 / 15,2 43 350x145x860 145 300 520 R801HB 41 350x145x760 145 300 420 R801HB001

300 CHV-M 300 / 15,2 49 350x145x940 145 300 600 R801HC 49 350x145x860 145 300 520 R801HC001

400 CHV-M 400 / 15,2 61 350x175x980 175 300 640 R801HF 59 350x175x910 175 300 570 R801HF001

500 CHV-M 500 / 15,2 70 350x175x1120 175 300 780 R801HG 68 350x175x980 175 300 640 R801HG001

600 CHV-M 600 / 15,2 81 350x175x1260 175 300 920 R801HH 79 350x175x1120 175 300 780 R801HH001

BIL: 70/170 kV - 18,2 V (30 kV System)

kvar Type

50 Hz 60 Hz




CodeP B H P B H

50 CHV-M 50 / 18,2(*) 19 350x145x510 145 300 170 R801J3 19 350x145x510 145 300 170 R801J3001

75 CHV-M 75 / 18,2(*) 23 350x145x590 145 300 250 R801J5 23 350x145x510 145 300 170 R801J5001

100 CHV-M 100 / 18,2(*) 25 350x145x590 145 300 250 R801J6 25 350x145x510 145 300 170 R801J6001

133 CHV-M 133 / 18,2(*) 28 350x145x670 145 300 330 R801J7 28 350x145x590 145 300 250 R801J7001

150 CHV-M 150 / 18,2(*) 31 350x145x670 145 300 330 R801J8 31 350x145x670 145 300 330 R801J8001

167 CHV-M 167 / 18,2(*) 33 350x145x760 145 300 420 R801J9 31 350x145x670 145 300 330 R801J9001

200 CHV-M 200 / 18,2(*) 38 350x145x760 145 300 420 R801JA 36 350x145x760 145 300 420 R801JA001

250 CHV-M 250 / 18,2(*) 43 350x145x860 145 300 520 R801JB 41 350x145x760 145 300 420 R801JB001

300 CHV-M 300 / 18,2 49 350x145x940 145 300 600 R801JC 49 350x145x860 145 300 520 R801JC001

400 CHV-M 400 / 18,2 61 350x175x980 175 300 640 R801JF 59 350x175x910 175 300 570 R801JF001

500 CHV-M 500 / 18,2 70 350x175x1120 175 300 780 R801JG 68 350x175x980 175 300 640 R801JG001

600 CHV-M 600 / 18,2 81 350x175x1260 175 300 920 R801JH 79 350x175x1120 175 300 780 R801JH001




R8-15R8-15

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BIL: 20 / 60 kV - 3,3 kV

kvar Type

50 Hz 60 Hz

weight (kg) Dim. (mm)

Figure (page 30) Code weight


CodeP B H P B H

50 CHV-T 50 /3,3 17 350x160x420 160 180 200 R80223 17 350x160x420 160 180 200 R80223001

75 CHV-T 75 /3,3 20 350x160x520 160 180 300 R80225 20 350x160x520 160 180 300 R80225001

100 CHV-T 100 /3,3 22 350x160x520 160 180 300 R80226 22 350x160x520 160 180 300 R80226001

150 CHV-T 150 /3,3 28 350x160x630 160 180 410 R80228 28 350x160x630 160 180 410 R80228001

200 CHV-T 200 /3,3 34 350x160x800 160 180 580 R8022A 32 350x160x690 160 180 470 R8022A001

250 CHV-T 250 /3,3 40 350x160x800 160 180 580 R8022B 40 350x160x800 160 180 580 R8022B001

300 CHV-T 300 /3,3 46 350x160x890 160 180 670 R8022C 44 350x160x960 160 180 740 R8022C001

400 CHV-T 400 /3,3 57 350x160x1090 160 180 870 R8022F 56 350x160x1050 160 180 830 R8022F001

500 CHV-T 500 /3,3 68 350x175x1030 175 180 810 R8022G 66 350x175x960 175 180 740 R8022G001

BIL: 20 / 60 kV - 6,6 kV

kvar Type

50 Hz 60 Hz

weight (kg) Dim. (mm)

Figure (page 30) Code weight


CodeP B H P B H

50 CHV-T 50 / 6,6 17 350x160x420 160 180 200 R80283 17 350x160x420 160 180 200 R80283001

75 CHV-T 75 / 6,6 20 350x160x520 160 180 350 R80285 20 350x160x520 160 180 300 R80285001

100 CHV-T 100 / 6,6 22 350x160x520 160 180 410 R80286 22 350x160x520 160 180 300 R80286001

150 CHV-T 150 / 6,6 28 350x160x630 160 180 470 R80288 28 350x160x630 160 180 410 R80288001

200 CHV-T 200 / 6,6 34 350x160x800 160 180 580 R8028A 32 350x160x690 160 180 470 R8028A001

250 CHV-T 250 / 6,6 40 350x160x800 160 180 670 R8028B 40 350x160x800 160 180 580 R8028B001

300 CHV-T 300 / 6,6 46 350x160x890 160 180 670 R8028C 44 350x160x960 160 180 740 R8028C001

350 CHV-T 350 / 6,6 53 350x160x890 160 180 670 R8028D 51 350x160x960 160 180 740 R8028D001

400 CHV-T 400 / 6,6 57 350x160x1090 160 180 870 R8028F 56 350x160x1050 160 180 830 R8028F001

500 CHV-T 500 / 6,6 68 350x175x1030 175 180 810 R8028G 66 350x175x960 175 180 740 R8028G001

CHV-T Three-phase capacitors

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R8-16R8-16

Peak connection current Inductance required

Insulated capacitor bank (no more banks)

For current limitation in bank 100 In

For limiting below the equipment’s closure power

Capacitor banks in parallel

Calculation assistance expressions

Terminología:

Ip: Current connection spikeScc: Short circuit power in kV·AQ: Bank power in kV·AU: System voltage in kVIa: Closure power of the automatic switch

•••••

C1. Capacity of the last bank connectedCeq: Equivalent capacity of existing banks Ct: Capacity of all existing capacitors existents in parallelL1. Shock inductance of the last bank connectedLt: Equivalent inductance of the connected banks

•••••

RMV, Shock reactors

Connecting capacitors banks causes voltage transients and very high currents.

The IEC 60871-1 standard defines the maximum value of a connection spike a capacitor bank is able to support. This value 100 times it’s rated current.

If this value is exceeded, assembly of RMV shock reactors is required, this limits the current transient to acceptable values for the capacitors. The inductance value is variable in terms of the installation conditions, basically depending on the following parameters:

• Short circuit power of the installation• Existence of more capacitor banks• Closure power of the automatic switches. The residual connection spike current value once the reactor is assembled has to be lower than the equipment’s closure value

In order to size the reactor, the following (supplied by the IEC 60871-1 standard) is used.

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RMV-260I (A) Type L (µH) Weight (kg) Code

50 RMV - 260 - 50 - 350 350 13 R80628

60 RMV - 260 - 60 - 250 250 14 R80637

100 RMV - 260 - 100 - 100 100 16 R80664

125 RMV - 260 - 125 - 50 50 14 R80672

175 RMV - 260 - 175 - 30 30 14 R80691

RMV-330I (A) Type L (µH) Weight (kg) Code

60 RMV - 330 - 60 - 450 450 20 R80739

75 RMV - 330 - 75 - 350 350 21 R80748

90 RMV - 330 - 90 - 250 250 26 R80757

125 RMV - 330 - 125 - 100 100 22 R80774

200 RMV - 330 - 200 - 50 50 22 R807A2

250 RMV - 330 - 250 - 30 30 23 R807B1

FEATURES

Assembly features

Type Encapsulated in resinAir core

Mountings M12 / M16 according to type


Weight according to type (see upper table)

Colour colour RAL 8016

Standars IEC 60289

Electrical features

Rated short duration current 43 In / 1 s

Dynamic current 2,5 It

Insulation level 12 kV (28/75)

Environmental conditions

Operating temperature Categoría B

Maximum temperature 40 ºC

FEATURES

Category AC 3

No. of operations 300 000

Maximum operating power 2 000 kvar a 6,6 kV

Assembly features

Connection Fixed

Dimensions 350 x 392 x 179 mm

Weight 22 kg

Standards IEC 60470

Electrical features

Auxiliary voltage 220 V a.c. / 110 V d.c. (*)

Rated voltage 6,6 kV

Rated current 400 A

Cut off power 4 kA


Insulation level 7,2 kV

(*) On request

RMV

LVC, Vacuum contactor

The LVC contactor is specifically designed for industrial applications where are large number of operations is required. More specifi cally for loads such as motors and capacitors.

The LVC vacuum contactor is ideal for capacitor banks operations from 3.3 up to 6.6 kV. Its general features are:

Extinguishing method, vacuumPerfect control of the electrical arc in capacitive operationsVery long lifeVery well insulated equipment made up of three independent

vacuum poles in an insulated structureSmall sizeOptimised lightweight equipment Easy to maintain

••••

•••

Shock reactors

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R8-18R8-18

Power kvar

Frequency Hz

Rated voltage kV

Insulation level (BIL) kV

Location Indoor Outdoor

Leakage line mm/kV

Without internal fuses

Class D Temperature ºC

On request, may be requested as a special:

Capacitor

Inductance µH

Frequency Hz

Rated voltage kV


Location Indoor Outdoor

Power of these banks

Short circuit power MV·ACurrent A

Thermal current kA

kvar

More banks installed Yes No

Necessary installation information

How to select bank components

Reactor

Contactor

Frequency Hz

Auxiliary voltage Va.c.

Rated voltage kV

Rated current kA


Reactive operating power kvar

Pressure switch Yes No

R8-19R8-19

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CIRKAP Capacitor banks

The CIRKAP series of banks is a complete range of both fi xed and automatic Medium Voltage capacitor banks (cabinet banks only).The CIRKAP capacitor banks are divided into two large groups:

Cabinet banks CIRKAP-COpen frame banks CIRKAP-B

••

CIRKAP capacitor banks

CIRKAP-C CABINET FRAMES CIRKAP-B

Automatic banks

High voltage bankMedium voltage banks

Fixed banks

With fi ltersBMFR

StandardBMF

StandardBAF

With fi ltersCMAR

StandardCMA

High power

CMA-GP

With fi ltersCMFR

StandardCMF

High power

CMF-GP

IDEAL APPLICATIONS

CIRKAP-C cabinet banksThe most usual applications are:

Medium voltage industrial systems

Correcting large motors. Normally from 3 to 11 kV.Correction of H.V. / M.V. transformers. Correction fi xed or automatic installations such as: cement companies, pumping stations, oil pipes, mining, paper

industry.

Generation and distribution systems

Distribution Substations. Particularly indoor substations where saving space is vitalGenerating plants requiring automatic reactive energy regulation: mini hydraulic stations, wind generation stations

CIRKAP-B frame banks

Frame banks are more usual in distribution substations and particularly in High Voltage applications.These may be used in any type of installation, but the use of fencing or supports is required to prevent contact with live parts.

•••

••

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R8-20R8-20

Features

Setting

Capacitors three-phase or single-phase in double star (according to type)

Bank Fixed or automatic

Assembly features


Weight according to type

Panels and frames Painted steel RAL 7035For outdoors, treated and painted steel

Voltage 1 ... 36 kV

Rated power 100 ... 7 200 kvar



Protection grade IP 23 (*)

Insulation level 7,2 ... 36 kV

Form TypesInsulation levels

7,2 kV 12 kV 17,5 kV 24 kV 36 kV

Fixed

Standard CMF7TCMF7D

CMF12TCMF12D CMF17D CMF24D CMF36D

High power CMF17GP CMF24GP CMF36GPW i t h r e j e c t fi lters

CMFR7TCMFR7D CMFR12D

Automatic

Standard CMA7TCMA7D

CMA12TCMA12D

CMA17D CMA24D CMA36D

High power CMA17GP CMA24GP CMA36GPW i t h r e j e c t fi lters

CMAR7TCMAR7D CMAR12D

CIRKAP-GP banks have special specifi c features at the corresponding point.

Classifi cation and designation of the CIRKAP-C range

In terms of insulation levels, type and form of correction

The following method is used to designate the type of bank:

Defi nition of the cabinet typeDefi nition of the bank powerDefi nition of the service voltage

Example:

For a fi xed capacitor bank with three-phase RMV reactance capacitors, implementation in cabinet from 900 kvar to 6.6 kV, the reference is: CMF7T / 900 / 6.6

•••

CIRKAP-C: Fixed or automatic banks in a cabinet

Installation of CIRKAP-C series banks offers the following advantages:

Protection against direct contact with live partsSaves space. Safety enclosures and the use of internal fuses

are not required allowing the size of the equipment to be greatly reduced

Option for including protective equipment for the bank or to manufacture automatic equipment

••

•

(*) On request, other values

R8-21R8-21

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A fi xed correction bank is required in an installation or in loads where reactive power levels are constant CMF.This series of banks may be installed with three-phase CHV-T capacitors (T) or single-phase CHV-M capacitors connected in a double star (D). The type of capacitor, and therefore the equipment’s setting will depend on the power and voltage values.

Three-phase capacitorskvar CMF7T CMF12T

kV 3-3,3 4,2 5-5,5 6-6,6 10 11Hz 50 60 50 60 50 60 50 60 50 60 50 60

100 • • • • • • • • • • • •

200 • • • • • • • • • • • •

300 • • • • • • • • • • • •

400 • • • • • • • • • • • •

500 • • • • • • • • • • • •

600 • • • • • • • • • • • •

700 • • • • • • • • • • • •

900 • • • • • • • • • • • •

1 000 • • • • • • • • • • • •

1 100 • • • • • • • • • •

1 200 • • • • • • • • • •

1 400 • • • • • • • •

Single-phase capacitors connected in a double starkvar CMF7D CMF12D

kV 3-3,3 4,2 5-5,5 6-6,6 10 11Hz 50 60 50 60 50 60 50 60 50 60 50 60

1 000 • • • • • • • • • • • •

1 100 • • • • • • • • • • • •

1 200 • • • • • • • • • • • •

1 500 • • • • • • • • • • • •

1 800 • • • • • • • • • • • •

2 100 • • • • • • • • • • • •

2 400 • • • • • • • • • • • •

2 700 • • • • • • • • • • • •

3 000 • • • • • • • • • • • •

3 300 • • • • • • • • • • • •

3 600 • • • • • • • • • •

CIRKAP CMF Banks up to 12 kV

These banks are equipped with:Capacitors:

- Three-phase CHV-T with internal fuses. Types CMF7T and CMF12T - Single-phase CHV-M with internal fuses connected in a double star. Types CMF7D and CMF12D

Protection fuses with fuse indicator, (CMF7T and CMF12T only)RMV Shock reactors Painted steel frame and cabinet

The following tables show powers achieved in terms of voltage and frequency of service:

••

•••

CIRKAP CMF banks up to 36 kVv

The banks are equipped with:

6, 9 or 12 single-phase CHV-M, capacitors with internal fuses connected in double star

Unbalance transformer RMV Shock reactors Painted steel frame and cabinet

•

•••

Single-phase capacitors connected in a double starkvar CMF17D CMF24D CMF36D

kV 13,8 15 20 22 25 30Hz 50 60 50 60 50 60 50 60 50 60 50 60

1 200 • • • • • • • • • • • •

1 500 • • • • • • • • • • • •

1 800 • • • • • • • • • • • •

2 100 • • • • • • • • • • • •

2 400 • • • • • • • • • • • •

2 700 • • • • • • • • • • • •

3 000 • • • • • • • • • • • •

3 300 • • • • • • • • • • • •

3 600 • • • • • • • • • • • •

4 050 • • • • • • • • • • • •

4 500 • • • • • • • • • • • •

4 800 • • • • • • • • • • • •

5 400 • • • • • • • • • • • •

6 000 • • • • • • • • • • • •

6 600 • • • • • • • • • • • •

7 200 • • • • • • • • • • • •

The following table shows the powers achieved in terms of the voltage and frequency of service:

CMF bank options

The following accessories may be requested:

Earth section switchFast discharge transformers

••

CMF Cabinet fi xed banks

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R8-22R8-22

Three-phase capacitorskvar CMA7T CMA12T

kV 3-3,3 4,2 5-5,5 6-6,6 10 11Hz 50 60 50 60 50 60 50 60 50 60 50 60

100 • • • • • • • • • • • •

200 • • • • • • • • • • • •

300 • • • • • • • • • • • •

400 • • • • • • • • • • • •

500 • • • • • • • • • • • •

600 • • • • • • • • • • • •

700 • • • • • • • • • • • •

900 • • • • • • • • • •

1 000 • • • • • • • •

1 100 • • • • • • • •

1 200 • • • • • • • •

1 400 • • • •

Single-phase capacitors connected in a double starkvar CMA7D CMA12D

kV 3-3,3 4,2 5-5,5 6-6,6 10 11Hz 50 60 50 60 50 60 50 60 50 60 50 60

1 200 • • • • • • • • • • • •

1 500 • • • • • • • • • • • •

1 800 • • • • • • • • • • • •

2 100 • • • • • • • • • • • •

2 400 • • • • • • • • • • • •

2 700 • • • • • • • • • • • •

3 000 • • • • • • • • • • • •

3 300 • • • • • • • • • • • •

3 600 • • • • • • • • • •

CIRKAP CMA step up to 36 kV

CMA17 / CMA 24 / CMA36 banks are equipped with an EC (cable input) module plus a number of steps (maximum 4).Each step is equipped with:

Automatic switch. As standard acting as equipment operator

Unbalance protectionRMV Shock reactors

CMA bank options

The following accessories may be requested:

Phase protection transformersEarth section switchLocking systemFast discharge reactors

The following table shows the powers achieved in terms of the voltage and frequency of service per step.

•

••

••••

Single-phase capacitors connected in a double starkvar CMA17D CMA24D CMA36D

kV 13,8 15 20 22 25 30Hz 50 60 50 60 50 60 50 60 50 60 50 60

1 200 • • • • • • • • • • • •

1 500 • • • • • • • • • • • •

1 800 • • • • • • • • • • • •

2 100 • • • • • • • • • • • •

2 400 • • • • • • • • • • • •

2 700 • • • • • • • • • • • •

3 000 • • • • • • • • • • • •

3 300 • • • • • • • • • • • •

3 600 • • • • • • • • • • • •

4 050 • • • • • • • • • • • •

4 500 • • • • • • • • • • • •

4 800 • • • • • • • • • • • •

5 400 • • • • • • • • • • • •

6 000 • • • • • • • • • • • •

6 600 • • • • • • • • • • • •

7 200 • • • • • • • • • • • •

A CMA bank should be installed when there are signifi cant load variations.This equipment is divided into steps and is controlled by a computerised reactive energy regulator mounted in the bank’s operating and control cabinet.There are two ways of constructing the steps depending on the service voltage and the level of insulation:

CIRKAP CMA step up to 36 kV

The CMA7 / CMA12 banks are equipped with an EC module (cable input ) plus a number of steps (maximum 4). Each step is equipped with:

Capacitors: - Three-phase CHV-T with internal fuses. Types CMA7T and CMA12T - Single-phase CHV-M with internal fuses. Types CMA7D and CMA12D

Vacuum contactor High breaking power fuses (CMA7T and CMA12T only)RMV Shock reactors

The following tables show the powers achieved in terms of voltage and frequency per step:

•

•••

CMA Cabinet automatic banks

R8-23R8-23

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The CIRKAP-GP banks is specially designed equipment for electrical distribution where the use of medium power capacitors is usual (300 - 350 kvar) in a small space.

As with the rest of the range there are two versions:

Fixed: CMF-GPAutomatic or with general protection: CMA-GPThe technical features are:

•••

FEATURES

CMF-GP CMA-GPAssembly features



Panels and frames Painted steel

For outdoors, treated and painted steel

Capacity for: 24 CHV-M capacitorsShock reactors RMV Earth section switch Unbalance transformer

••••

24 CHV-M capacitorsShock reactors RMV Earth section switch

plus lockingAutomatic switch Phase protection

transformers Unbalance transformer

•••

••

•

CMF-GP CMA-GPVoltage 20 ... 30 kV

Maximum power 8 Mvar



Protection grade IP 23 IP 54

Insulation level 24 kV / 36 kV

Setting

Capacitors Single-phase in double star

Bank Fixed automatic

GP High power cabinet banks

The banks have to be equipped with reject on fi lters when the harmonics level is signifi cant.

In the event of this occurring CIRCUTOR proposes CMFR fi xed banks or CMAR automatic banks, equipped with iron core reactors or capacitors tuned to 7 % up to insulating voltages of 7.2 kV.

For higher levels of voltage, air core reactors are used.

CMFR / CMAR Fixed or automatic banks in a cabinet with rejection

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R8-24R8-24

Features

Setting

Capacitors single-phase in double star

Bank Fixed

Assembly features

Dimensiones (mm) according to type


Panels and frames Treated and painted steel

Voltage 7,2 ... 33 kV

Rated power 600 ... 7200 kvar


Location indoor / Outdoor

Protection grade IP 00

Insulation level 7,2 ... 33 kV

Single-phase capacitors connected in a double starkvar BMF17D BMF24D BMF36D

kV 13,8 15 20 22 25 30Hz 50 60 50 60 50 60 50 60 50 60 50 60

1 200 • • • • • • • • • • • •

1 500 • • • • • • • • • • • •

1 800 • • • • • • • • • • • •

2 100 • • • • • • • • • • • •

2 400 • • • • • • • • • • • •

2 700 • • • • • • • • • • • •

3 000 • • • • • • • • • • • •

3 300 • • • • • • • • • • • •

3 600 • • • • • • • • • • • •

4 050 • • • • • • • • • • • •

4 500 • • • • • • • • • • • •

4 800 • • • • • • • • • • • •

5 400 • • • • • • • • • • • •

6 000 • • • • • • • • • • • •

6 600 • • • • • • • • • • • •

7 200 • • • • • • • • • • • •

CIRKAP-B: Frame assembled banks

Frame assembled banks are made up of:

CapacitorsUnbalance transformers From 36 kV, banks are designed with a frame per phase with

supporting insulators with an appropriate insulation level for the system’s service voltage.

As an option:

Shock reactors RMVFast discharge reactors

•••

••

The BMF series is designed from 7.2 up to 36 kV.

Normally they comprise 6, 9 or 12 capacitors connected in a double star. In the middle of the double star neutrals is the unbalance transformer to protect against internal faults.

The table shows the powers achieved in terms of the voltage and frequency of service.

BMF M.V. banks in a frame

R8-25R8-25

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For banks with voltages higher than 7.2 kV, banks with fi lters are designed for frames. The reactors used are air or iron core technology according to specifi cations

These reactors are supplied separately for subsequent assembly into the installation. Enough space needs to be kept to ensure the relevant magnetic safety gaps.

Therefore banks BMFR are comprised of:Capacitors in a double star settingPainted steel framesUnbalance current transformerAir core reactors

This equipment is studied on request

••••

BMFR M.V. banks in a frame with rejection fi lters

The BAF range of banks covers all voltages from 52.5 up to 123 kVThe BAF banks are set as a double star and, depending on voltage, are formed by 3 superimposed or independent frames.

Normally the unbalance transformer is delivered separately to be assembled on the fl oor.

Shock reactors are sent separately depending on the voltage levels. They are mounted on special frames or directly on the fl oor using insulators.

This equipment is studied on request.

BAF H.V. Capacitors , in a frame

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R8-26R8-26

How to select a capacitor bank

Electrical parameters

Location

Form of correction

Type

Design

Regulation (if automatic)

Assembly design

Installation information required

More banks installed

Existence of harmonics

Level of pollution standard special

Altitude m above sea level

Measurement in the event of harmonics kvar

Yes No

Yes No

Power of these banks kvar

Short circuit power MV·A

Contactor

Automatic switch

Phase protection transformersOverload and short circuit relayEarth section switch plus locking

Equipment and protection

Cut off power

Power kvar


Rated voltage kV

Frequency Hz

Cabinet Frame

kvar

Standard With fi lters

fi xed Automatic

Indoor Outdoor

Yes No

Yes No

Yes No

Yes No

Yes No

kA

R8-27R8-27

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GENERAL BASIC INFORMATION

INST

ALL

ATIO

N

System voltage (kV)System frequency (Hz)Short circuit power MV·AExistence of more banks (Yes/No)Existence of harmonics (Yes/No)

•••••

1

BA

NK

Power of bank (kvar)Bank voltage (kV)Fixed / automaticType: Standard or with fi ltersNeed for general

protection (Yes/No)Location: Indoor or OutdoorOther special requirements

•••••

••

2

DEFINITION OF PARTS

CA

PAC

ITO

RS Setting, single-phase or three-

phaseRated voltage (kV)Frequency (Hz)• Insulation level (kV)Power (kvar)Special leakage line (mm/kV)

•

•••••

5

REA

CTO

RS

Quantity (3 per bank or step) o escalón)

Inductance (µH)Current (A)Insulation level (kV)Rated short duration

current (kA/1s)Location: Indoor or Outdoor

•

••••

•

6

OPE

RAT

ING

EQ

UIP

MEN

T

For automatic banksContactor U < 12 kVSwitch U > 12 kVCapacitive power to cut off (kvar)Insulation level (kV)Switch cut off power (kA)

•••••

7

DEFINITION OF THE BANK

SETT

ING

Yes U > 11.5 kV and Q < 1 400 kvarThree-phase capacitor bank

Yes U > 11.5 and Q < 1 400 kvar orYes U < 11.5 and Q > 1 400 kvar

• Double star bank, single-phase capacitors

•

•

3

DES

IGN

Fixed:Cabinet type CMFframe type BMF

Automatic:Type CMANumber and power of steps

••

••

4

Equipment and parts defi nition guide

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R8-28R8-28

Calculation example The following example contains the basic parameters for a bank, in two scenarios:

Selection of complete bankSelection of parts to be assembled in a bank

To do this, follow the steps described in the “Defi nition of equipment and parts guide”

Selection of the bank

5.1. Installation information

This installation requires the assembly of two 4 MVar at 20 kV banks on the same busbar in the station.

••

GENERAL BASIC INFORMATION

INST

ALL

ATIO

N

System voltage (kV) : 20 kVSystem frequency (Hz): 50 HzShort circuit power MV·A: 150 MV·AExistence of more banks (Yes/No) : NOExistence of harmonics (Yes/No): NO

•••••

1

BA

NK

Power of bank (kvar): 4 MvarBank voltage (kV): 20 kVFixed / automatic: FixedType: standard or with fi lters: StandardNeed for general protection (Yes/No): No. Protection

cabinets envisagedLocation: Indoor or Outdoor: IndoorOthers special requirements: No

•••••

••

2

DEFINITION OF THE BANK

SETT

ING

3

DES

IGN Fixed assembled in CMF24D cabinet:

Cabinet CMF24D /4000/204

U > 11,5 and Q > 1 400 kvar

Double star bank, single-phase capacitors

R8-29R8-29

R.8

Capa

cito

rs, b

anks

and

m.v

. acc

esso

ries

Selection of parts

DEFINITION OF PARTSC

APA

CIT

OR

S

Setting, single-phase or three-phase: Single-phase (CHV-M)Rated voltage (kV): corresponds to phase voltage 11,56 kVFrequency (Hz): 50 HzInsulation level (kV): correspond to BIL system: 24 kV, 50 / 125 kVPower (kvar): The number of the equipment’s capacitors is calculatedThere are two possibilities, 6 or 9

capacitors. . Powers would be:

For 6 capacitors 667 kvar For 9 capacitors 445 kvar

The second option is selected with a 450 kvar capacitor power. Therefore, the setting will be asymmetric double star with 9 capacitors

Special leakage line (mm/kV): Clean atmosphere therefore class 1, i.e. 16 mm / kV

•••••

•

•

5

RE

AC

TOR

S

Two possible situations are studied:- Firstly, connecting a bank with the other disconnected- Secondly, the behaviour of the second bank being the fi rst to be connected

Insulated bank. The connection current spike is checkedTherefore, given that this value is below the maximum supported by the standard, RMV shock reactors would not be necessary.Banks in parallel. This is the most unfavourable scenario. Using the formulae in the shock reactor section (page 16), the following results are obtained:

Quantity (3 per bank or step): 3Inductance (µH): 30 µHCurrent (A): 115,6 * 1,5 (max. overload coeffi cient) = 173,4 A . Standard value 175 AInsulation level (kV): correspond to network of bill: 24 kV, 50/125kV (need of extra isolators)Rated short duration current (kA/1s): 43 InLocation: Indoor or Outdoor: Indoor

••••••

6

OP

ER

ATIN

G E

QU

IPM

EN

T

In this example, the banks do not include equipment but the required information is supplied to the project manager to correctly defi ne the general protection cabinet:

Automatic switch: 400 ó 630 A. Recommended extinguishing method vacuum or SF6Capacitive power to cut off (kvar): 4 000 kvarInsulation level (kV): 24 kVSwitch cut off power (kA): 12,5 kA

••••

7

Capa

cito

rs, b

anks

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M.V

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ries

R.8

R8-30R8-30

Dimensions

TypeAØ

mm

BØ

mmC

mmD

mmE

mmF

mm Inserts

RMV-260 260 130 370 160 370 290 M12

RMV-330 330 150 470 190 355 210 M12/M16

CHV-M

350430

M12

P40

B

H

100

321 2x÷9x16

115

12 capacitors6 capacitors

CHV-T

RMV

BMF17D / BMF24D

R8-31R8-31

R.8

Capa

cito

rs, b

anks

and

m.v

. acc

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ries

1525

1105 880

1650

1525 880

Cabinet with 2 capacitors

Cabinet with 4 capacitors

Cabinet with 12 capacitors(mm) L W H

CMF7D CMF12D 1770 1550 1880

CMF17D CMF24D 2080 1825 1880

Cabinet with 6 capacitors(mm) L W H

CMF7D CMF12D 1200 1550 1880

CMF17D CMF24D 1300 1825 1880

L W

H

L W

H

EC cable input module

CMF7T / CMF12T

CMF7D / CMF12D / CMF17D / CMF24D

CMA7T / CMA12T

R8-32R8-32

cod.

C3R

893-

01R.8

Vial Sant Jordi, s/n08232 Viladecavalls

Barcelona (Spain)Tel. (+34) 93 745 29 00

Fax: (+34) 93 745 29 14e-mail: [email protected]

web: www.circutor.com

Design: Comunication • CIRCUTOR, SA

Capa

cito

rs, b

anks

and

M.V

. acc

esso

ries

CIRCUTOR reserves the right to change the content of this catalogue without prior warning.CIRCUTOR does not assume any responsibility for any damage caused to persons or materials due to improper or unsuitable use of its equipment.

CMA7D / CMA12D

CMA17D/ CMA24D

GP

EC cable input module

CMF-GPCMA-GP

R.8 INTRODUCTION Capacitors, banks and M.V. …ksafelectric.com/pdf/circutor/r8_gb.pdf ·...

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Transcript of R.8 INTRODUCTION Capacitors, banks and M.V. …ksafelectric.com/pdf/circutor/r8_gb.pdf ·...