The following results are obtained on a 50 KVA; 1000/200V 50Hz transformers. OC test: 200V, 1.2 A, 90 W L.S SC test: 50 V; 5A and 110 W H.V Determine deficiency as half load at 0.8 pf lagging

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written 8.7 years ago by

teamques10 ★ 69k

• modified 5.0 years ago

basic electrical engineering

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written 8.7 years ago by

teamques10 ★ 69k

From OC test (meters are connected on secondary side)

W1= 90 W

W1= 0.09 KW

From SC test (meters are connected on H.V side)

WSC = 110 W

Full load current=

KVA rating *1000/V1

∴ I1= 3 * 1000/1000= 5A

WCU= WSC = 110 W = 0.11 KW

Efficiency at …

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