Sunday

April 20, 2014

April 20, 2014

Posted by **ram** on Friday, January 13, 2012 at 2:37am.

Find the percentage of full load the transformer is carrying. If additional unity power

factor loads are to be served with the same transformer, how many kW may be added

before the transformer is at full load

- electrical -
**Henry**, Sunday, January 15, 2012 at 12:23pm1. KVA*cosA = 12 KW,

KVA*0.45 = 12,

KVA = 26.7. = KVA used.

%F.L. = (26.7/35) * 100% = 76.3.

2. P = (35-26.7)cosA,

P = 8.3*1 = 8.3 KW = Amt of unity P.F.

Load that can be added.

Alternate Method:

1. %F.L. = (12/(35*0.45) * 100% = 76.2

2. 12KW/0.45 + P/1 = 35 KVA,

26.7 + P = 35,

P = 35 - 26.7 = 8.3 KW. = Unity P.F.

Load that can be added.

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