Short Circuit

Electrical Transient Analyzer Program

ANSI Standard

3-Phase Fault Currents

Short-Circuit Analysis

Total

Number of Buses:

Swing

V-Control

Load

Total

Number of Branches:

XFMR2

XFMR3

Reactor

Line/Cable

Impedance

Tie PD

Total

Number of Machines:

Generator

Grid

Motor

Machines

Synchronous

Synchronous

Induction

Load

Lumped

1

1

14

7

1

0

5

0

0

1

1

2

7

4

16

13

15

Power

System Frequency:

60

Hz

Unit System:

English

Project Filename:

EXAMPLE-ANSI

Adjustments

Transformer Impedance:

Reactor Impedance:

Adjustments

Apply

/Global

Individual

Percent

Tolerance

Overload Heater Resistance:

Transmission Line Length:

Cable Length:

Temperature Correction

Transmission Line Resistance:

Cable Resistance:

Apply

Adjustments

Individual

/Global

Degree C

Individual Individual Individual Individual Yes Yes No No No Yes Yes

Bus Input Data

ID Type Nom. kV

Bus

Base kV

Initial Voltage

%Mag. Ang. Sub-sys 0.480 0.480 Load Bus1 1 100.00 0.00 0.480 0.480 Load Bus2 1 100.00 0.00 13.800 13.800 Load Bus6 1 100.00 0.00 13.800 13.800 Load Bus7 1 100.00 0.00 4.160 4.160 Load Bus9 1 100.00 0.00 0.492 0.480 Load Bus23A 1 101.45 -1.23 0.480 0.480 Load LVBus 1 97.09 -3.49 34.500 34.500 SWNG Main Bus 1 100.00 0.00 0.492 0.480 Load MCC1 1 97.94 -3.10 13.800 13.800 Load Sub2A 1 101.52 -1.20 13.800 13.800 Gen. Sub2B 1 100.00 1.40 4.160 4.160 Load Sub 3 1 99.81 -0.50 4.160 4.160 Load Sub3 Swgr 1 99.59 -0.50 3.450 3.450 Load Sub22 1 100.00 0.00 3.450 3.450 Load Sub23 1 100.00 0.00 34.500 34.500 Load T1~ 0 100.00 0.00 16 Buses Total All voltages reported by ETAP are in % of bus Nominal kV. Base kV values of buses are calculated and used internally by ETAP.

Line/Cable Input Data

ID Library Size #/Phase T (°C) R

Line/Cable

Ohms or Siemens/1000 ft per Conductor (Cable) or per Phase (Line)

Adj. (ft) % Tol. Length Y X Cable2 5.0MCUS3 750 222.0 0 1 75 0.02230 0.03640 0.0000000 Cable14 1.0MCUN3 250 430.0 0 2 75 0.05520 0.03790 0.0000000 Cable22 15MCUS3 350 410.1 0 1 75 0.03815 0.04500 0.0000000 Cable23 15MCUS3 350 410.1 0 1 75 0.03815 0.03600 0.0000000 Line4 210 5280.0 0 1 75 0.05125 0.12758 0.0000012

2-Winding Transformer Input Data

ID MVA Prim. kV Sec. kV % Z X/R Prim. Sec.

Transformer

% Tol.

Rating

Z Variation

+ 5% - 5% % Z

Adjusted

% Tap Setting

T2 10.000 34.500 13.800 6.90 23.00 -1.50 2.10 0 0 0 6.9000 T3 0.750 4.160 0.480 5.75 18.00 0 0 0 0 0 5.7500 T4 1.500 4.160 0.480 5.75 7.10 0 0 0 0 0 5.7500 T5 0.750 3.450 0.480 5.75 5.79 0 0 0 -2.500 0 5.7500 T22 5.000 13.800 3.450 6.50 12.14 0 0 0 0 0 6.5000 T23 5.000 13.800 3.450 6.50 12.14 0 0 0 0 0 6.5000 XFMR 3 1.000 4.160 0.480 7.20 28.00 0 0 0 -2.500 0 7.2000

3-Winding Transformer Input Data

ID Winding MVA kV % % Z X/R MVAb

Transformer

Rating

Impedance

% Tol. - 5%

Z Variation

+ 5%

Tap

T1 7.20 5.000 13.800 4.160 Zpt = Zst = 40.00 Primary: Secondary: Tertiary: 15.000 15.000 10.000 15.000 34.500 Zps = 7.10 39.00 15.000 38.00 14.10 0 0 0 0 0 0 0 0

Branch Connections

ID Type From Bus To Bus R X Z

CKT/Branch

Connected Bus ID

% Impedance, Pos. Seq., 100 MVAb

Y

T2 2W XFMR Main Bus Sub2A 3.00 68.93 69.00

T3 2W XFMR Sub3 Swgr LVBus 42.53 765.49 766.67 T4 2W XFMR Sub 3 Bus1 53.46 379.59 383.33 T5 2W XFMR Sub23 Bus23A 124.04 718.18 728.81 T22 2W XFMR Bus7 Sub22 10.67 129.56 130.00 T23 2W XFMR Bus6 Sub23 10.67 129.56 130.00 XFMR 3 2W XFMR Sub3 Swgr MCC1 24.43 684.01 684.45 T1 3W Xfmr Main Bus T1~ -0.03 0.67 0.67 Sub2B T1~ 1.24 46.65 46.67 3W Xfmr Sub 3 T1~ 1.23 47.32 47.33 3W Xfmr

Cable2 Cable Sub 3 Sub3 Swgr 2.86 4.67 5.48

Cable14 Cable Bus1 Bus2 515.10 353.67 624.83

Cable22 Cable Sub2A Bus7 0.82 0.97 1.27

Cable23 Cable Sub2B Bus6 0.82 0.78 1.13

Power Grid Input Data

ID ID MVASC kV R X

Rating

X/R

100 MVA Base

% Impedance

Power Grid

Connected Bus

Utility Main Bus 1200.000 34.500 45.00 0.18514 8.33128 Total Connected Power Grids (= 1 ): 1200.000 MVA

Synchronous Generator Input Data

MVA kV RPM X"/R X'/R R Adj. Tol.

Synchronous Generator

Rating

X/R Ratio

% Impedance in Machine Base

Connected Bus

ID Type ID Xd' Xd" 0.250 48.00 48.00 1800 13.800 8.824

Gen1 Turbo Sub2B 12.00 0.0 23.00

Synchronous Motor Input Data

kVA kV RPM X"/R X'/R R Adj. Xd'

Synchronous Motor

Rating

X/R Ratio

% Impedance in Machine Base

Connected Bus

ID Type ID Qty Xd" Tol.

Syn1 Motor 1 Sub2A 1170.4 13.200 1800 27.00 27.00 0.570 15.38 0.0 23.08

Syn2 Motor 1 LVBus 134.2 0.460 1800 11.00 11.00 1.818 20.00 0.0 30.00

Total Connected Synchronous Machines ( = 2 ): 1304.6 kVA

Induction Machine Input Data

kVA kV RPM X"/R X'/R R X" X'

Induction Machine

Connected Bus

Rating

X/R Ratio

Machine Base

ID ID

% Impedance

HP/kW Qty Motors Mtr2 1 Sub2B 2500.00 2060.05 13.200 1800 24.99 24.99 0.83 20.79 31.19 Pump 1 1 Sub3 Swgr 500.00 446.99 4.000 1800 4.82 4.82 3.88 18.68 28.02 Mtr1 1 Bus23A 100.00 118.05 0.380 1800 9.02 9.02 2.22 20.00 50.00 Mtr6 2 MCC1 60.00 53.74 0.460 1800 6.03 6.03 3.32 20.00 50.00 Mtr4 1 MCC1 125.00 110.12 0.460 1800 8.71 8.71 2.30 20.00 50.00 Mtr3 1 MCC1 75.00 66.20 0.460 1800 6.74 6.74 2.97 20.00 50.00 Mtr5 1 MCC1 50.00 45.32 0.460 1800 5.51 5.51 3.63 20.00 50.00

Lumped Load Input Data

ID

ID kVA kV X"/R X'/R R X" X'

Lumped Load

Rating

X/R Ratio

% Imp. (Machine Base)

kW kvar

Loading

MTR STAT

% Load

Loading

kW kvar

Lumped Load

Connected Bus

Motor Loads

Static Loads

LUMP1 LVBus 220.0 0.460 70 30 134.0 75.9 2.38 2.38 8.403 20.00 50.00 62.52 35.43 LUMP2 Sub22 3500.0 3.300 60 40 1785.0 1106.2 10.00 10.00 1.538 15.38 23.08 1300.64 806.06 LUMP4 Bus23A 500.0 0.400 70 30 297.5 184.4 2.38 2.38 10.050 23.92 9999.00 183.60 113.79 LUMP6 Bus9 500.0 4.160 60 40 255.0 158.0 6.67 6.67 2.307 15.38 23.08 170.00 105.36 Total Connected Lumped Loads ( = 4 ): 4720.0 kVA

SHORT-CIRCUIT REPORT

3-phase fault at bus: LVBus

Prefault voltage

=

0.490

=

102.00

% of nominal bus kV (

0.480

kV)

=

102.00

% of base (

0.480

kV)

ID From Bus Real /Real Magnitude

ID Imaginary

From Bus To Bus % V kA kA Imag. kA Symm.

Contribution

1/2 Cycle

Total 0.00 1.292 12.9 16.659 LVBus -16.609 LVBus 94.78 0.844 17.6 14.869 Sub3 Swgr -14.845 LVBus 106.43 0.081 11.0 0.893 Syn2 -0.889 LVBus 106.43 0.367 2.4 0.948 LUMP1 -0.874 Sub3 Swgr 95.35 0.088 18.8 1.656 Sub 3 -1.654 Sub3 Swgr 95.30 0.003 6.7 0.018 Bus9 -0.018 Sub3 Swgr 98.04 0.002 8.5 0.017 MCC1 -0.016 Sub3 Swgr 106.08 0.005 5.3 0.025 Pump 1 -0.025 Sub 3 95.35 0.000 999.9 0.000 Bus1 0.000 Sub 3 101.00 0.088 18.8 1.656 T1~ -1.654 # Bus9 102.00 0.003 6.7 0.018 LUMP6 -0.018 MCC1 109.16 0.006 7.4 0.046 Mtr6 -0.045 MCC1 109.16 0.004 11.8 0.047 Mtr4 -0.047 MCC1 109.16 0.003 8.5 0.028 Mtr3 -0.028 MCC1 109.16 0.003 6.6 0.019 Mtr5 -0.019 NACD Ratio = 1.00

# Indicates a fault current contribution from a three-winding transformer

* Indicates a fault current through a tie circuit breaker

3-phase fault at bus: Main Bus

Prefault voltage

=

35.190

=

102.00

% of nominal bus kV (

34.500

kV)

=

102.00

% of base (

34.500

kV)

ID From Bus Real /Real Magnitude From Bus Real Imaginary /Real Magnitude

ID Imaginary

From Bus To Bus % V kA kA Imag. kA Symm. % V kA kA Imag. kA Symm.

Contribution

1/2 Cycle

1.5 to 4 Cycle

Total 0.00 0.528 41.6 21.959 Main Bus -21.953 0.00 0.508 -21.771 42.9 21.777 Main Bus 12.76 0.022 14.3 0.310 Sub2A -0.309 9.16 0.016 -0.222 13.9 0.222 Main Bus 0.47 0.051 22.7 1.167 T1~ -1.166 # 0.43 0.037 -1.071 29.3 1.072 Main Bus 102.00 0.455 45.0 20.483 Utility -20.478 102.00 0.455 -20.478 45.0 20.483 Sub2A 12.88 0.044 10.6 0.464 Bus7 -0.462 9.24 0.032 -0.339 10.4 0.340 Sub2A 106.64 0.010 30.0 0.310 Syn1 -0.310 106.64 0.007 -0.215 29.2 0.215 T1~ 29.70 0.030 34.8 1.048 Sub2B -1.048 # 28.32 0.024 -1.000 42.3 1.000 T1~ 3.85 0.021 5.5 0.120 Sub 3 -0.118 # 2.48 0.013 -0.071 5.5 0.072 Bus7 27.29 0.044 10.6 0.464 Sub22 -0.462 19.81 0.032 -0.339 10.4 0.340 Sub2B 29.72 0.020 3.6 0.072 Bus6 -0.070 28.32 0.001 -0.012 8.6 0.012 Sub2B 102.00 0.043 51.5 2.224 Gen1 -2.223 102.00 0.049 -2.266 46.5 2.266 Sub2B 106.64 0.013 25.9 0.327 Mtr2 -0.327 106.64 0.009 -0.222 24.6 0.222 Sub 3 4.19 0.177 5.5 0.992 Sub3 Swgr -0.976 2.69 0.107 -0.592 5.5 0.601 Sub 3 3.85 0.000 999.9 0.000 Bus1 0.000 2.48 0.000 0.000 999.9 0.000 NACD Ratio = 0.96

# Indicates a fault current contribution from a three-winding transformer

* Indicates a fault current through a tie circuit breaker

3-phase fault at bus: MCC1

Prefault voltage

=

0.490

=

102.00

% of nominal bus kV (

0.480

kV)

=

99.45

% of base (

0.492

kV)

ID From Bus Real /Real Magnitude

ID Imaginary

From Bus To Bus % V kA kA Imag. kA Symm.

Contribution

1/2 Cycle

Total 0.00 0.925 19.3 17.860 MCC1 -17.836 MCC1 91.62 0.608 25.8 15.698 Sub3 Swgr -15.686 MCC1 106.43 0.116 6.0 0.708 Mtr6 -0.699 MCC1 106.43 0.083 8.7 0.731 Mtr4 -0.726 MCC1 106.43 0.064 6.7 0.437 Mtr3 -0.433 MCC1 106.43 0.053 5.5 0.298 Mtr5 -0.293 Sub3 Swgr 92.23 0.062 29.0 1.797 Sub 3 -1.796 Sub3 Swgr 92.19 0.003 7.6 0.019 Bus9 -0.019 Sub3 Swgr 92.41 0.003 5.1 0.015 LVBus -0.014 Sub3 Swgr 103.43 0.005 5.9 0.028 Pump 1 -0.027 Sub 3 92.23 0.000 999.9 0.000 Bus1 0.000 Sub 3 98.36 0.062 29.0 1.797 T1~ -1.796 # Bus9 99.45 0.003 7.6 0.019 LUMP6 -0.019 LVBus 103.77 0.002 28.3 0.062 Syn2 -0.062 LVBus 103.77 0.022 2.8 0.066 LUMP1 -0.062 NACD Ratio = 1.00

# Indicates a fault current contribution from a three-winding transformer

* Indicates a fault current through a tie circuit breaker

3-phase fault at bus: Sub 3

Prefault voltage

=

4.243

=

102.00

% of nominal bus kV (

4.160

kV)

=

102.00

% of base (

4.160

kV)

ID From Bus Real /Real Magnitude From Bus Real Imaginary /Real Magnitude

ID Imaginary

From Bus To Bus % V kA kA Imag. kA Symm. % V kA kA Imag. kA Symm.

Contribution

1/2 Cycle

1.5 to 4 Cycle

Total 0.00 0.820 32.2 26.411 Sub 3 -26.398 0.00 0.740 -25.967 35.1 25.978 Sub 3 0.41 0.190 5.3 1.030 Sub3 Swgr -1.013 0.24 0.112 -0.606 5.4 0.616 Sub 3 0.00 0.000 999.9 0.000 Bus1 0.000 0.00 0.000 0.000 999.9 0.000 Sub 3 86.60 0.631 40.3 25.393 T1~ -25.385 # 86.52 0.628 -25.362 40.4 25.369 Sub3 Swgr 8.02 0.042 5.9 0.252 Bus9 -0.249 5.46 0.028 -0.170 6.1 0.173 Sub3 Swgr 10.74 0.043 4.3 0.188 LVBus -0.183 6.00 0.021 -0.103 4.9 0.105 Sub3 Swgr 12.17 0.031 7.4 0.233 MCC1 -0.231 5.29 0.014 -0.099 7.0 0.100 Sub3 Swgr 106.08 0.073 4.8 0.357 Pump 1 -0.350 106.08 0.049 -0.234 4.8 0.239 Bus1 0.00 0.000 999.9 0.000 Bus2 0.000 0.00 0.000 0.000 999.9 0.000 T1~ 87.76 0.070 41.2 2.903 Main Bus -2.902 # 87.68 0.071 -2.906 40.9 2.907 T1~ 91.04 0.006 28.1 0.159 Sub2B -0.159 # 90.77 0.005 -0.152 32.5 0.152 Bus9 102.00 0.042 5.9 0.252 LUMP6 -0.249 102.00 0.028 -0.170 6.1 0.173 LVBus 106.43 0.058 13.8 0.800 Syn2 -0.798 106.43 0.046 -0.559 12.1 0.561 LVBus 106.43 0.315 2.5 0.850 LUMP1 -0.789 106.43 0.136 -0.330 2.4 0.357 MCC1 109.16 0.098 6.5 0.642 Mtr6 -0.635 109.16 0.044 -0.272 6.2 0.276 MCC1 109.16 0.068 9.6 0.663 Mtr4 -0.659 109.16 0.031 -0.283 9.1 0.285 MCC1 109.16 0.054 7.3 0.397 Mtr3 -0.393 109.16 0.024 -0.169 7.0 0.170 MCC1 109.16 0.045 5.9 0.270 Mtr5 -0.266 109.16 0.020 -0.114 5.7 0.116 Main Bus 89.54 0.003 14.1 0.043 Sub2A -0.043 88.97 0.002 -0.031 13.6 0.031 Main Bus 102.00 0.067 42.5 2.860 Utility -2.859 102.00 0.069 -2.875 41.8 2.876 Sub2B 91.04 0.003 3.5 0.011 Bus6 -0.011 90.77 0.000 -0.002 8.1 0.002 Sub2B 102.00 0.009 38.1 0.337 Gen1 -0.337 102.00 0.010 -0.345 34.9 0.345 Sub2B 106.64 0.002 22.0 0.050 Mtr2 -0.050 106.64 0.002 -0.034 20.9 0.034 NACD Ratio = 1.00

# Indicates a fault current contribution from a three-winding transformer

* Indicates a fault current through a tie circuit breaker

3-phase fault at bus: Sub3 Swgr

Prefault voltage

=

4.243

=

102.00

% of nominal bus kV (

4.160

kV)

=

102.00

% of base (

4.160

kV)

ID From Bus Real /Real Magnitude From Bus Real Imaginary /Real Magnitude

ID Imaginary

From Bus To Bus % V kA kA Imag. kA Symm. % V kA kA Imag. kA Symm.

Contribution

1/2 Cycle

1.5 to 4 Cycle

Total 0.00 1.828 13.3 24.407 Sub3 Swgr -24.339 0.00 1.747 -23.909 13.7 23.973 Sub3 Swgr 9.22 1.639 14.2 23.379 Sub 3 -23.322 9.22 1.635 -23.302 14.2 23.360 Sub3 Swgr 7.65 0.042 6.0 0.253 Bus9 -0.250 5.23 0.028 -0.171 6.2 0.173 Sub3 Swgr 10.43 0.043 4.3 0.189 LVBus -0.184 5.80 0.021 -0.103 4.9 0.105 Sub3 Swgr 11.84 0.031 7.4 0.234 MCC1 -0.232 5.08 0.014 -0.099 7.1 0.100 Sub3 Swgr 106.08 0.073 4.8 0.359 Pump 1 -0.351 106.08 0.049 -0.234 4.8 0.239 Sub 3 9.22 0.000 999.9 0.000 Bus1 0.000 9.22 0.000 0.000 999.9 0.000 Sub 3 87.85 1.639 14.2 23.379 T1~ -23.322 # 87.77 1.635 -23.302 14.2 23.360 Bus9 102.00 0.042 6.0 0.253 LUMP6 -0.250 102.00 0.028 -0.171 6.2 0.173 LVBus 106.43 0.057 14.1 0.803 Syn2 -0.801 106.43 0.046 -0.560 12.2 0.562 LVBus 106.43 0.315 2.5 0.853 LUMP1 -0.793 106.43 0.136 -0.331 2.4 0.358 MCC1 109.16 0.097 6.5 0.645 Mtr6 -0.637 109.16 0.044 -0.273 6.2 0.277 MCC1 109.16 0.068 9.8 0.665 Mtr4 -0.662 109.16 0.031 -0.284 9.1 0.285 MCC1 109.16 0.053 7.4 0.398 Mtr3 -0.394 109.16 0.024 -0.169 7.0 0.171 MCC1 109.16 0.045 5.9 0.271 Mtr5 -0.267 109.16 0.020 -0.115 5.7 0.116 Bus1 9.22 0.000 999.9 0.000 Bus2 0.000 9.22 0.000 0.000 999.9 0.000 T1~ 88.91 0.186 14.3 2.673 Main Bus -2.666 # 88.83 0.187 -2.670 14.3 2.676 T1~ 91.92 0.012 12.3 0.146 Sub2B -0.146 # 91.68 0.011 -0.140 13.1 0.140 NACD Ratio = 1.00

# Indicates a fault current contribution from a three-winding transformer

* Indicates a fault current through a tie circuit breaker

Momentary Duty Summary Report

3-Phase Fault Currents: (Prefault Voltage =

102

% of the Bus Nominal Voltage)

ID kV ID Type kA rms Ratio M.F. kA rms kA Peak kA rms kA rms kA Peak

Symm. X/R Asymm. Asymm. Symm. Asymm. Asymm.

Momentary Duty

Device

Bus

Device Capability

43.000 25.602 1.537 16.4 16.659 LVBus 0.480 LVBus MCC 108.000 64.000 59.982 36.318 1.654 44.3 21.959 Main Bus 34.500 Main Bus MCC 108.000 64.000 59.982 36.318 1.654 44.3 21.959 CB2 34.500 5 cy Sym CB 108.000 64.000 59.982 36.318 1.654 44.3 21.959 CB10 34.500 5 cy Sym CB 108.000 64.000 59.982 36.318 1.654 44.3 21.959 CB1 34.500 5 cy Sym CB 47.371 28.425 1.592 23.6 17.860 MCC1 0.480 MCC1 MCC 71.815 43.421 1.644 39.1 26.411 Sub 3 4.160 Sub 3 MCC 132.300 78.000 71.815 43.421 1.644 39.1 26.411 CB8 4.160 5 cy Sym CB 97.000 58.000 71.815 43.421 1.644 39.1 26.411 CB9 4.160 5 cy Sym CB 97.200 58.000 71.815 43.421 1.644 39.1 26.411 CB18 4.160 5 cy Sym CB 132.300 78.000 71.815 43.421 1.644 39.1 26.411 CB19 4.160 5 cy Sym CB 65.810 39.000 62.051 36.794 1.508 13.9 24.407 Sub3 Swgr 4.160 Sub3 Swgr Switchgear 132.300 78.400 62.051 36.794 1.508 13.9 24.407 CB14 4.160 5 cy Sym CB 132.300 78.400 62.051 36.794 1.508 13.9 24.407 CB13 4.160 5 cy Sym CB 110.700 66.000 62.051 36.794 1.508 13.9 24.407 CB3 4.160 5 cy Sym CB

Method: IEEE - X/R is calculated from separate R & X networks.

* Indicates a device with momentary duty exceeding the device capability

Protective device duty is calculated based on total fault current.

Interrupting Duty Summary Report

3-Phase Fault Currents: (Prefault Voltage =

102

% of the Bus Nominal Voltage)

ID kV ID Type kA rms Ratio M.F. kA rms kV PF Int.

Symm. X/R Adj. Sym. Test

Interrupting Duty

Int.

Device

Bus

Device Capability

Rated Adjusted (Cy)

CPT

LVBus 0.480 16.659 16.4

Main Bus 34.500 CB2 5 cy Sym CB 3.0 21.777 44.5 1.230 26.790 38.000 40.000 40.000

Fuse1 Fuse 21.959 44.3 1.087 23.866 38.000 6.65 10.000 10.000 * CB10 5 cy Sym CB 3.0 21.777 44.5 1.230 26.790 38.000 40.000 40.000 CB1 5 cy Sym CB 3.0 21.777 44.5 1.230 26.790 38.000 40.000 40.000 MCC1 0.480 Fuse3 Fuse 17.860 23.6 1.047 18.696 5.500 6.70 50.000 50.000 CB17 Molded Case 17.860 23.6 1.276 22.797 0.600 20.00 25.000 25.000 CB15 Molded Case 17.860 23.6 1.276 22.797 0.600 20.00 22.000 22.000 * CB7 Molded Case 17.860 23.6 1.276 22.797 0.480 20.00 30.000 30.000 Fuse2 Fuse 17.860 23.6 1.196 21.359 0.600 15.00 200.000 200.000 Sub 3 4.160 CB8 5 cy Sym CB 3.0 25.978 39.6 1.207 31.357 4.800 41.000 47.308 CB9 5 cy Sym CB 3.0 25.978 39.6 1.207 31.357 4.800 29.000 33.462 CB18 5 cy Sym CB 3.0 25.978 39.6 1.207 31.357 4.800 29.000 33.462 CB19 5 cy Sym CB 3.0 25.978 39.6 1.207 31.357 4.800 41.000 47.308 Sub3 Swgr 4.160 CB14 5 cy Sym CB 3.0 23.973 14.0 1.000 23.973 4.800 41.000 47.308 CB13 5 cy Sym CB 3.0 23.973 14.0 1.000 23.973 4.800 41.000 47.308 CB3 5 cy Sym CB 3.0 23.973 14.0 1.000 23.973 8.300 33.000 41.000 Method: IEEE - X/R is calculated from separate R & X networks.

HV CB interrupting capability is adjusted based on bus nominal voltage

Generator protective device duty is calculated based on maximum through fault current. Other protective device duty is calculated based on total fault current. Short-circuit multiplying factor for LV Molded Case and Insulated Case Circuit Breakers is calculated based on asymmetrical current.

* Indicates a device with interrupting duty exceeding the device capability

**Indicates that the circuit breaker has been flagged as a generator circuit breaker. However, ETAP could not detect a single path, without a transformer, to the specified generator. Therefore, this circuit breaker is treated as a regular circuit breaker in short-circuit calculations.