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Answer Posted / vinodth
consider 1 transformer having the power 125mw,33kv...
1)p=125mw,
v=33kv,
cosQ=0.8
p=1.732VlIlcosQ
I=125000/1.732*33000*0.8
I=2733.7
2)cosQ=0.7
I=125000/1.732*33000*0.7
I=3124.29
loss=i*ir..if the pf reduces,then loss get increases...v
cant maintain the pf as unity,tats y the pf s maintained as 0.8
| Is This Answer Correct ? | 7 Yes | 5 No |
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234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
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