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T NH TO N NG N MCH THEO PHNG PH P T NG TR

1/Cc trng hp ngn mch :

U I D h (kA)

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2a2 / T ng tr trong my bi n thZT : T ng tr ng n mch bi n th

100 x ST(KVA) ST : Cng sut my bin th

usc : % in p ngn mch ca Bin pTng qut RT

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Short Circuit Calculation Sheet

TNH TAN NGN MCH THEO PHNG PHP TNG TR

Key : U ( three phase fault ) U (kV) = 22

3 x Zsc usc (%) = 5

ST(MVA) = 126

RL() =

()

U2(KV)xusc(%)

Isc(KA) =

ZT() =

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Short Circuit Calculation Sheet

High Voltage

15kV or 22kV 110kV or 66kV LBS

3C-70

LBS-1

3C-70

TR-1

LBS-2

3C-70

LBS TR-2

Low VoltageTR-1 3f4W

22KV/400V-230V

VCB Pn=2000KVA

Z=6%

1C-500

LBS-1 LBS-2 ACB-4P

TR-2 3f3W

22KV/200V2.5%

Pn=1000KVA

Z=6%

1C-500ACB-3P

TR-1 TR-2

2000 KVA 1000 KVA

0.6KV Cable XLPE/PVC ( 1C-500 Sqmm ) X 16 0.6KV Cable XLPE/PVC ( 1C-500 Sqmm ) X 12

(L=20m) (L=20m)

ACB 4P ACB 3P

MSB-1

MSB-2

No

SUB

HV

ITEM

ZT()

ZL()

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Short Circuit Calculation Sheet

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Short Circuit Calculation Sheet