Power Generation: Site Design, Installation, and Connection

[yijin]

hi!

the customer's load is 200KVA, pf o.6,  Smooth start,   if I choose the standard alternator(PF 0.8), what the power of the alternator need, Tks!

[tuyenpham]

200kVA, PF 0.6, electric power: 120 ekW

If you choose PF 0.8 alternator, it's kVA may be 150.

[wtc2008 · Accepted solution]

yijin,

The ekw of load  is 120ekw, the KVA is 200KVA.

The KVA and KW of alternator should be bigger than load, so the alternator should be less 200KVA @pf=0.8.

Because the alternator is standard designed for pf=0.8, so the prime mover is bigger.

But the alternator should be derated @ pf=0.6, the factor is 0.85, so the alternator should be oversized to 236KVA.

I suggest you select a standard 150kva/120kw(pf=0.8) genset and oversized the alternator to 236KVA.

Hope to help you.

wtc2008