Short Circuit Fault Calculator V62
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Transcript of Short Circuit Fault Calculator V62
Job NamePersonalize by entering the 'Job Name' and 'Your Company Name' Utility Fault Current
Company Name
Available Fault Current Calculation0 amperes kVA = E = trans. FLA = 300 0 0 Step 1b: by:John Sokolikboth the kVA Insert rating and impedence of transformer. (Note: When you insert
I = kVA x 1000 = trans. FLA 0 Isca = trans. FLA current ampere rating fault x 100 = from transformer Z local utilityIsca = ampere short-circuit current RMS symmetrical.
Step 1a: Insert available
the kVA rating and impedence you must select a voltage from the select the Voltage and Phase from dropdown box before the value will be calculated.)
or Isca
Z
= =
0 3 % 0 amperesSelect Voltage & Phase
Point to Point Method Step 2: Select type of (distance) Length conductor and conduit 2xLxI (ASC) 'f ' factor =
N x C x E L-N
# conductors per phase
Phase conductor constant Step 3: Insert the LengthVoltone to Line of Line conductor Neutral conductor constant Multiplier Volt Line to Neutral Step 4: Insert the number of M = conductors per phase. 1 1+f Line to Line Line to Neutral Fault Current at Service Equipment
L = Isca = N = C = EL-L = f = C = EL-N = f =
150 Select Conductor & Raceway 0 1 2/0 0 Phase Conductor 0 Volt 0.000 0 Neutral Conductor 2 0 Volt 0.000
Step 5a: Select phase M = 1.000 conductor size size. M = 1.000
Step 5b: Select neutral conductor size.
Finished product Isca x M = fault current at terminals of main disconnect L- L = CALCULATED FAULT CURRENT Isca x M = fault current at terminals of main disconnect L- N =
0 amperes 0 amperes
Fault Current from Service disc. to panel "_____" Single Phase Feeder Length (distance) 2xLxI (ASC) 'f ' factor = N x Cby entering next point x E L-N # conductors per phase Continue to point Phase conductor constant Volt Line to Line Neutral conductor constant Volt Line to Neutral Multiplier M= 1 Line to Line L =
Select Conductor & Raceway
Single Phase
Isca = N = C = EL-L = f = C = EL-N = f = M =
0 Phase 0 Phase Conductor
0AWG
0 Volt0.000 0 Neutral Conductor 0 Volt 0.000 1.000AWG
1+f
Line to Neutral
M
=
1.000
Isca x M = fault current at terminals of the panel L- L = Isca x M = fault current at terminals of the panel L- N = Calculation does not include motor contribution
0 amperes 0 amperes
Branch Circuit Fault from Single Phase Branch 2xLxI 'f ' factor =
Point to Point Length (distance) (ASC)# conductors per phase
Select Conductor & Raceway
L
= 0 Phase 0 Phase Conductor
Single Phase
N x C x E L-N
Phase conductor constant Volt Line to Line Neutral conductor constant Volt Line to Neutral Multiplier M= 1 1+f Line to Line Line to Neutral
Isca = N = C = EL-L = f = C = EL-N = f = M M = =
0AWG
0 Volt0.000 0 Neutral Conductor 0 Volt 0.000 1.000 1.000AWG
Isca x M = fault current at terminals of the panel L- L = Isca x M = fault current at terminals of the panel L- N = Calculation does not include motor contribution
0 amperes 0 amperes
on
1b: Insert both Ver. 4.00 the kVA ng and impedence of ormer. (Note: When you insert
ating and impedence you must voltage from the select the Voltage se from dropdown box before the l be calculated.)
Voltage & Phase
Conductor & Raceway
2/0
2
ep 5b: Select neutral conductor size.
Conductor & Raceway
Single Phase
NeutralAWG
AWG
Conductor & Raceway Single Phase
NeutralAWG
AWG
Job Name Your Company Name
Available Fault Current Calculationby:John Sokolik
Ver. 6.3
Utility Fault Current
23,132 amperes
I = kVA x 1000 = trans. FLA E x 1.732 Isca = trans. FLA x 100 transformer Z
kVA = E = trans. FLA =
208 0
Three Singl in PVC AWG ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### 400 kcmil 500 kcmil 600 kcmil 750 kcmil 1000 kcmil
=Isca =
0 % 0 amperes Three Phase 208/120 FEET
Isca = ampere short-circuit current RMS symmetrical.
Point to Point Method 'f ' factor = Length (distance) 1.732 x L x I (ASC) L = Isca = N = C = EL-L = f = C = EL-N = f = M M = =
N x C x E L-N
# conductors per phase
Phase conductor constant Volt Line to Line Neutral conductor constant Volt Line to Neutral M= 1 1+f
Multiplier
50 Copper in Nonmetallic Raceway 23,132 1 500 kcmil 26,706 Phase Conductor 208 Volt 0.361 26,706 Neutral Conductor 500 kcmil 120 Volt 0.625 0.735 0.615
Line to Line Line to Neutral Fault Current at Service Equipment
Isca x M = fault current at terminals of main disconnect L- L = Isca x M = fault current at terminals of main disconnect L- N =
17,001 amperes 14,234 amperes### ###
Neutral
Fault Current from (example FROM SERVICE EQUIP TO PANEL) Three Phase Feeder 1.732 x L x I 'f ' factor = Length (distance) (ASC)# conductors per phase
Copper in Nonmetallic Raceway Three Phase
N x C x E L-N
Phase conductor constant Volt Line to Line Neutral conductor constant Volt Line to Neutral Multiplier M= 1 1+f Line to Line Line to Neutral
L = Isca = N = C = EL-L = f = C = EL-N = f = M M = =
100 17,001 Phase 14,234 Neutral 1 7,493 Phase Conductor 1 208 Volt 1.889 7,493 Neutral Conductor 1 120 Volt 2.742 0.346 0.267
### ### ### ###
### Isca x M = fault current at terminal of the panel L- L = Isca x M = fault current at terminal of the panel L- N = Calculation does not include motor contribution
5,884 amperes 3,804 amperes### ###
AL/PVC CU/MET AL/MET
