whats the formula for working out the full load current of a star delta motor
i think its P/V X 0.58
i think its P/V X 0.58
star delta motor calcs
- Thread starter slama01902
- Start date
thingmaker3
- Joined May 16, 2005
- 5,083
Star, or Delta?
For Star (also called "Wye"):
Eline = \(\sqrt{3}\)Ephase
and
Iline = Iphase
But for Delta:
Eline = Ephase
and
Iline = \(\sqrt{3}\)Iphase
For Star (also called "Wye"):
Eline = \(\sqrt{3}\)Ephase
and
Iline = Iphase
But for Delta:
Eline = Ephase
and
Iline = \(\sqrt{3}\)Iphase
i need the calculation for the amps for a star delta started motor, terminal box has 6 terminals so you are using 6 wires U1 V1 W1 / U2 V2 W2
eg if you have a 550 kw 400 volts wired in star delta what amps is that???
eg if you have a 550 kw 400 volts wired in star delta what amps is that???
in star
current is
power(input)/(sqrt(3)*line voltage)--line voltage is voltage across two phases.
for delta:
there are two currents
current in each phase and current thru the supply lines,
power/(sqrt(3)*line voltage)
gives line current,
line current=sqrt(3)*phase current
current is
power(input)/(sqrt(3)*line voltage)--line voltage is voltage across two phases.
for delta:
there are two currents
current in each phase and current thru the supply lines,
power/(sqrt(3)*line voltage)
gives line current,
line current=sqrt(3)*phase current
