Sunday, March 30, 2014

Three phase Motors Parameters calculations


It is very important to find  out electrical parameters for an electrical engineer.

Very time installation of motor required certain parameters calculations which are stated as below:-



Electrical Parameter to Find
Alternating Current
Single-Phase
Three-Phase
Amperes when horsepower is known
HP x 746
E x Eff x pf
HP x 746

1.73 x E x Eff x pf
Amperes when kilowatts are known
KW x 1000

E x pf
KW x 1000
1.73 x E x pf
Amperes when KVA are known
KVAx 1000
E
KVA x 1000
1.73 x E
Kilowatts
I x E x pf
1000
1.73 x I x E x pf
1000
KVA
I x E
1000
1.73 x I x E
1000
Horsepower = (Output)
I x E x Eff x pf
746
1.73 x I x E x Eff x pff
746

As from above we can find out ampere a motor can take. Day to day checking motor ampere is very much required for an electrical engineer.