Mechanical and Electrical Engineering Consultants · 4.3 CIRCUIT BREAKER SETTINGS LT Delay ID Frame...
Transcript of Mechanical and Electrical Engineering Consultants · 4.3 CIRCUIT BREAKER SETTINGS LT Delay ID Frame...
Mechanical and Electrical Engineering Consultants
POWER STUDIES
8150 North Central Expressway M-2100 Campbell Centre Dallas Texas 75206Tel 214-739-8880 Fax 214-739-1777 Toll Free 877-620-2890 www.jjainc.com
Texas Registered Engineering Firm # F-1290
Engineering Since 1978
Market ServicesPower Systems MEP Engineering
JJA, Inc. is a leading Mechanical and Electrical Engineering Consulting firm established in 1978 in Dallas, Texas providing engineering design of HVAC, Plumbing Fire Suppression, Electrical Distribution and Critical Power Systems, Lighting systems, Life Safety systems, Sustainable Designs, Energy Modeling and MEP System Commissioning.
JJA holds Professional Engineering registrations in over 30 states, providing services locally, regionally, and nationally. JJA also performs national on-call MEP services for several corporate Clients.
JJA is committed to sustainable design solutions, utilizing innovative engineering design processes that focus on the life cycle performance for MEP Systems.
JJA is dedicated to servicing our clients with integrity and responsiveness, while providing a collaborative TEAM solution.
JJA, Inc.Company Profile
JJA is a leading consulting engineering firm established in 1978 in Dallas, Texas, and has been providing power system analysis since our inception with an emphasis added to ArcFlash Hazard Assessments in 2003. We have standardized on the use of EasyPower® software, developed by ESA, Inc. located in Portland, Oregon. The analysis is based on the NFPA-70E and IEEE-1584 standards, which require a detailed model be developed for the electrical distribution system.
JJA has performed Power System Studies for mission critical facilities, commercial office buildings, corporate campuses, industrial, manufacturing, and corporate campus projects. Power System Analysis performed by JJA includes an overview of the electrical distribution system using three (3) separate but integrated steps. Each step of the study; the Short Circuit Study, the Coordination Study and the Arc Flash Study, work together to determine potential concerns and possible methods of improving the selective coordination of the electrical distribution system and provides labeling compliance with permanent labeling of the equipment per NFPA 70E and OSHA.
JJA is committed to providing a safe working environment for our Clients by providing a complete electrical distribution system power study.
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Power Study Clients - Partial ListingFlextronicsHolman BoilerHunt OilNortelRackspaceUUNetViaWest
Power System Study
Short Circuit Study
Coordination Study
Arc Flash Study
Power Systems Services
JJA, Inc.Power Systems - At a Glance
Engineering Design = Understanding PerformanceJJA is extremely qualified to perform power system design and analysis on a variety of electrical distribution system types, system complexity, and size. With our strong roots in the engineering design of electrical distribution system, and focus on mission critical applications, we understand electrical infrastructure configurations, modes of operations, and how system should perform or operate under normal, emergency, and fault conditions.
EasyPower = Industry PartnershipIn 1998 JJA standardized on EasyPower, as developed by EAS, Inc, as our Window’s based computer analytical software to be used for our power system analysis. The software is based on IEEE 1584 and NFPA-70E requirements and provides excellent resources and formatted output. Our partnership with ESA, Inc. includes their involvement in code committees at both IEEE & NFPA, continual software updates as standards are modified, technical support and intensive training of JJA personnel. ESA, Inc. offers “Safety Tracker” software that allows end users to develop energized work permits based on NFPA-70E using the calculated arc flash energy for all the various operating modes presented in our reports.
Power System StudyA Power System Study is used to provide a complete overview of the electrical distribution system using three (3) separate but integrated steps. Each step of the study; the Short Circuit Study, the Coordination Study and the Arc Flash Study, work together to determine potential concerns and possible methods of improving the selective coordination of the electrical distribution system and provides labeling compliance with permanent labeling of the equipment per NFPA and OSHA.
Short Circuit StudyThe Short Circuit Study is used to determine if all electrical components of the distribution system are rated properly for the anticipated fault currents. Multiple operational scenarios are considered in the Short Circuit Study to validate the worse case conditions. NEC 110.9 and NFPA 70E both require that the rating of the equipment be sufficient for interrupting the maximum available fault current and that the equipment be able to withstand or interrupt the fault currents at the point of use.
Coordination StudyThe Coordination Study is used to illustrate and document the circuit breaker settings throughout the electrical distribution system. The Coordination Study will determine the time and current values at which a circuit breaker should trip. This part of the study will determine the order in which circuit breakers trip and evaluates the selective coordination of the circuit breakers. Circuit breaker trip settings are an important part in generating the results of the arc flash study, since the time it takes to trip a circuit breaker affects the time an arc will be sustained and ultimately determines the arc flash hazard.
Arc Flash StudyAn arc flash is an electrical discharge that uses the air as a conductor, due to a fault between a phase bus bar and another phase bus bar, neutral or ground.
The massive energy discharge from an arc flash event will cause metal to vaporize and thus causing an explosive volumetric increase in pressure conservatively estimated as an expansion of 40,000 to 1. The metal of buss bars and conductor can often be melted or even vaporized, leading to explosively hot gas and molten metal being dispersed through the air. This could result in serious injury, property damage or even death. This is why it is important to have properly selected over-current protective devices and a proper coordination between these devices to handle the arc fault conditions. In addition to the calculation, guidance to the required level of Personnel Protective Equipment (PPE) is provided and documented with the use of OSHA warning labels.
Mechanical and Electrical Engineering Consultants
8150 N. Central ExpwyM-2100 Campbell CentreDallas, Texas 75206Tel 214-739-8880Toll Free 877-620-2890Fax 214-739-1777www.jjainc.com
HVAC SystemsUnderfloor Air SystemsThermal Storage SystemsBuilding AutomationPlumbing SystemsElectrical Power DistributionLighting SystemsEmergency Power SystemsCritical Systems Coordination StudiesEnergy ModelingFire SuppressionLife Safety SystemsSustainable Design BIM Production
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Mechanical Engineering Electrical Engineering Plumbing & Fire Suppression Certified Commissioning AgentsTexas Registered Engineering Firm # F-1290
4.3 CIRCUIT BREAKER SETTINGS
LT Delay
IDManufacture Type
StyleFrame/ Tap/ Setting Mult Trip Band Setting Trip Band I2t Setting Overrid Trip Pickup Trip Delay I2t
DP140A-1GE
Spectra RMS MCCB SE 60A (60AT) 60 11 60 Fixed Max 456 Fixed In Max Pickup 750
Out
DP140A-2GE
Spectra RMS MCCB SE 60A (60AT) 60 11 60 Fixed 5 228 Fixed In 5 Pickup 462
Out
DP140B-1GE
Spectra RMS MCCB SE 60A (60AT) 60 11 60 Fixed Max 456 Fixed In Max Pickup 750
Out
DP140B-2GE
Spectra RMS MCCB SE 60A (60AT) 60 11 60 Fixed 5 228 Fixed In 5 Pickup 462
Out
DP140MA-1GE
Spectra RMS MCCB SE 30A (30AT) 30 11 30 Fixed Max 243 Fixed In Max Pickup 375
Out
DP140MA-2GE
Spectra RMS MCCB SE 30A (30AT) 30 11 30 Fixed Max 243 Fixed In Max Pickup 375
Out
DP140MA-3GE
Spectra RMS MCCB SE 30A (30AT) 30 11 30 Fixed Max 243 Fixed In Max Pickup 375
Out
DP140MB-1GE
Spectra RMS MCCB SE 30A (30AT) 30 11 30 Fixed Max 243 Fixed In Max Pickup 375
Out
DP140MB-2GE
Spectra RMS MCCB SE 30A (30AT) 30 11 30 Fixed Max 243 Fixed In Max Pickup 375
Out
DP140MB-3GE
Spectra RMS MCCB SE 30A (30AT) 30 11 30 Fixed Max 243 Fixed In Max Pickup 375
Out
GCB-140B-1GE
MVT-PlusICCB
3000 3000 13000 4
5.5 19500 Max Out 5.5 Pickup 19500 0.35 1050 Max In
GCB-140B-2GE
MVT-PlusICCB
3000 3000 13000 4
5.5 19500 Max Out 5.5 Pickup 19500 0.35 1050 Max In
GCBRG2-1GE
MVT-PlusICCB
3000 3000 13000 4
5.5 19500 Max Out 5.5 Pickup 19500 0.35 1050 Max In
GCBRG2-2GE
MVT-PlusICCB
3000 3000 13000 4
5.5 19500 Max Out 5.5 Pickup 19500 0.35 1050 Max In
SW-140 GEN G1GE
MVT-PlusICCB
3000 3000 13000 4
5.5 19500 Max Out 5.5 Pickup 19500 0.35 1050 Max In
SW-140 UTIL M1GE
MVT-PlusICCB
3000 3000 13000 4
5.5 19500 Max Out 5.5 Pickup 19500 0.31 930 Max In
SW-140A MAINGE
MVT-PlusICCB
3000 3000 13000 3
4.5 15000 Max Out 4.5 Pickup 15000 0.23 690 Int In
SW-140A-1GE
MVT-PMMCCB
800800 1
8004
4 3200 0.4 Out 4 Pickup 3200 0.6 480 1 Out
SW-140A-2GE
MVT-PMMCCB
800800 0.5
4004
4 1600 0.4 Out 4 Pickup 3200 0.3 240 1 Out
SW-140A/B TIEGE
MVT-PlusICCB
3000 3000 13000 2
4.5 15000 Max Out 4.5 Pickup 15000 0.23 690 Max In
SW-140B MAINGE
MVT-PlusICCB
3000 3000 13000 3
4.5 15000 Max Out 4.5 Pickup 15000 0.23 690 Int In
SW-140B-1GE
MVT-PMMCCB
800800 1
8004
4 3200 0.4 Out 4 Pickup 3200 0.6 480 1 Out
SW-140B-2GE
MVT-PMMCCB
800800 0.5
4004
4 1600 0.4 Out 4 Pickup 3200 0.3 240 1 Out
SW-UPS140AGE
MVT-PlusICCB
1600 1600 11600 3
5 8000 Min Out 5 Pickup 8000 0.2 320 Min Out
SW-UPS140A-1GE
MVT-PMMCCB
600600 0.85
5103
3 1530 0.2 Out 6.5 Pickup 3900 1 600 1 Out
SW-UPS140A-2GE
MVT-PMMCCB
600600 0.85
5103
3 1530 0.2 Out 6.5 Pickup 3900 1 600 1 Out
SW-UPS140BGE
MVT-PlusICCB
1600 1600 11600 3
5 8000 Min Out 5 Pickup 8000 0.2 320 Min Out
SW-UPS140B-1GE
MVT-PMMCCB
600600 0.85
5103
3 1530 0.2 Out 6.5 Pickup 3900 1 600 1 Out
SW-UPS140B-2GE
MVT-PMMCCB
600600 0.85
5103
3 1530 0.2 Out 6.5 Pickup 3900 1 600 1 Out
UPS140AGE
MVT-PlusICCB
1600 1600 11600 3
5 8000 Min Out 5 Pickup 8000 0.2 320 Min Out
UPS140A BYPASS Merlin Gerin Masterpact NW Micrologic 6.0 2000 2000 0.81600 20
5 9600 0.4 Out 5 Pickup 12000 A 500 0.2 In
UPS140BGE
MVT-PlusICCB
1600 1600 11600 3
5 8000 Min Out 5 Pickup 8000 0.2 320 Min Out
UPS140B BYPASS Merlin Gerin Masterpact NW Micrologic 6.0 2000 2000 0.81600 20
5 9600 0.4 Out 5 Pickup 12000 A 500 0.2 In
IDManufacturer
TypeStyle
FrameTrip Setting Trip (A)
H140A MAINGE
E150TEY
100A (50A) 50
H140B MAINGE
E150TEY
100A (50A) 50
L140A MAINGE
Q LineTHQB
100(60- 100
L140B MAINGE
Q LineTHQB
100(60- 100
LUPS140 MAINGE
Q LineTHQB
100(60- 100
PDU140A1SQD
K FrameKAL 250A (225AT) 225 2250 2250
PDU140A2SQD
K FrameKAL 250A (225AT) 225 2250 2250
PDU140B1SQD
K FrameKAL 250A (225AT) 225 2250 2250
PDU140B2SQD
K FrameKAL 250A (225AT) 225 2250 2250
UPS-140A1 Q1SQD
P FramePHF 2000 (1200T) 1200 5700 5700
UPS-140B1 Q1SQD
P FramePHF 2000 (1200T) 1200 5700 5700
UPS140A1 Q5NSQD
M FrameMHL
1000A 1000 5000 5000
UPS140B1 Q5NSQD
M FrameMHL
1000A 1000 5000 5000
SST
Thermal Magnetic Breaker
InstGround Trip
Instantaneous
Circuit Breaker SettingsLTPU
STPU
4-4
5.3 ARC FLASH HAZARD COMPARISON REPORT (AFCR)
Bus/ParameterNormal Utility
Emergency GeneratorRedundant Generator
Redundant Utility
BUS:ATS-140A-CRAH-11
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
8.392
8.08
8.392
8.44
Est. Arc Fault(kA)
5.441
5.273
5.441
5.467
Est. Arc Flash Boundary(in)
7.561
7.392
7.561
7.587
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
0.418
0.404
0.418
0.42
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A-CRAH-13
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
8.392
8.08
8.392
8.44
Est. Arc Fault(kA)
5.441
5.273
5.441
5.467
Est. Arc Flash Boundary(in)
7.561
7.392
7.561
7.587
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
0.418
0.404
0.418
0.42
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A-CRAH-15
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
2.444
2.434
2.444
2.448
Est. Arc Fault(kA)
1.948
1.941
1.948
1.95
Est. Arc Flash Boundary(in)
3.57
3.562
3.57
3.573
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
0.138
0.138
0.138
0.139
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A-CRAH-1
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
21.04517.027
21.04521.429
Est. Arc Fault(kA)
11.703
9.8111.703
11.881
Est. Arc Flash Boundary(in)
13.25211.648
13.25213.399
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
0.955
0.79
0.955
0.971
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A-CRAH-3
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
21.04517.027
21.04521.429
Est. Arc Fault(kA)
11.703
9.8111.703
11.881
Est. Arc Flash Boundary(in)
13.25211.648
13.25213.399
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
0.955
0.79
0.955
0.971
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A-CRAH-5
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
23.03618.108
23.03623.505
Est. Arc Fault(kA)
12.61910.326
12.61912.832
Est. Arc Flash Boundary(in)
14.00412.094
14.00414.177
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
1.036
0.835
1.036
1.055
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A-CRAH-7
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
25.393
19.2825.393
25.972
Est. Arc Fault(kA)
13.685
10.8813.685
13.945
Est. Arc Flash Boundary(in)
14.86212.565
14.86215.068
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
1.131
0.883
1.131
1.154
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A-CRAH-9
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
8.392
8.08
8.392
8.44
Est. Arc Fault(kA)
5.441
5.273
5.441
5.467
Est. Arc Flash Boundary(in)
7.561
7.392
7.561
7.587
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
0.418
0.404
0.418
0.42
Required Clothing Class
#0
#0
#0
#0
BUS:ATS-140A
Worst Case
Base kV
0.48
0.48
0.48
0.48
Bolted Fault(kA)
46.21225.672
46.21248.141
Est. Arc Fault(kA)
22.535
13.8122.535
23.315
Est. Arc Flash Boundary(in)
21.4514.996
21.4521.991
Working Distance(in)
18
18
18
18
Incident Energy(cal/cm2)
1.942
1.146
1.942
2.015
Required Clothing Class
#1
#0
#1
#1
Arc Flash Hazard Comparison Report
5-7
COORDINATION REPORT
George Laity, PE, CxADirector of EngineeringDirect [email protected]
Laurence Basceanu, PE, LEED APElectrical EngineeringDirect [email protected]