Short Circuit Current Calculation (Base KVA Method).xls

	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P
1
2	Fault Current Calculation (Base KVA Method)
3	Base KVA Details:
4	Base KVA for H.T. Breaker and Transformer Primary		6	MVA		Jignesh.Parmar, jiguparmar@yahoo.com
5	Base KV for H.T. Breaker and Transformer Primary		6٫6	KV		www.electricalnotes.wordpress.com,
6	Base KVA for Transformer Secondary and down stream		2٫5	MVA
7	Base KVA for Transformer Secondary and down stream		0٫415	KV
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9	HT Incoming Power Supply Details
10	HT Power received at		6٫6	KV
11	Fault Level at HT Incoming Power Supply		360	MVA
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13	Transformer Details:
14	Transformer Rating		2٫5	MVA
15	Transformer Impedence		6٫00%	6
16	% Reactance at Base KVA		6٫00%
17
18	Fault Level at HT Side (Sub-station):
19	From	To	Cable Details								Z PU Reactance	Total Impedance up to this Location (Ω)	Fault Level
20	From	To	Cable Size	No of Run	Length (Meter)	Resistance (Ω/Km)	Reactance (Ω/Km)	Total Cable Resistance (R5)	Total Cable Reactance (X5)	Z Impedance (Ω)	Z PU Reactance	Total Impedance up to this Location (Ω)	Fault Level @ Locations	Fault MVA	Fault Current (KA)
21	HT incoming	HT Circuit Breaker		5	50	0٫10230	0٫09900	0٫00102	0٫00099	0٫00142	0٫01667	0٫0181	HT Circuit Breaker	332	50
22	HT Circuit Breaker	Primary Side of Transformer		3	400	0٫10230	0٫09900	0٫01364	0٫01320	0٫01898	0٫00261	0٫02070	Primary Side of Transformer	290	44
23	Primary Side of Transformer											0٫02070		290	44
24												0٫02070		290	44
25												0٫02070		290	44
26		Secondary Side of Transfomer									0٫06000	0٫0807	Secondary Side of Transfomer	31	43
27
28	Fault Level at LV Side (Substation to Down Stream):
29	Secondary Side of Transfomer	Main LT Panel		13	12	0٫10230	0٫06180	0٫00009	0٫00006	0٫00011	0٫00160	0٫0823	Main LT Panel	30	42
30	Main LT Panel	Feeder Piller		2	160	0٫10230	0٫06180	0٫00818	0٫00494	0٫00956	0٫13879	0٫2211	Feeder Piller	11	16
31	Feeder Piller	Sub Panel		6	150	0٫123	0٫0739	0٫00308	0٫00185	0٫00359	0٫05207	0٫2732	Sub Panel	9	13
32	Sub Panel	Motor Control Panel		6	150	0٫123	0٫0739	0٫00308	0٫00185	0٫00359	0٫05207	0٫3252	Motor Control Panel	8	11
33	Motor Control Panel
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