380v/660v delta/star meaning
380v/660v delta/star meaning
(OP)
a sew motor has the following name plat e data:
V 380/660 delta/star
A 9.2/4.3
kW 4
I want to clerify that above motor should be essentially connected in delta at 380 and to star at 660?
or it can be connected to star 380v? and the current mentioned as 9.2A refers to delta connection at 380v
and 4.3 A to star or otherwise.[/sup][/sup]
V 380/660 delta/star
A 9.2/4.3
kW 4
I want to clerify that above motor should be essentially connected in delta at 380 and to star at 660?
or it can be connected to star 380v? and the current mentioned as 9.2A refers to delta connection at 380v
and 4.3 A to star or otherwise.[/sup][/sup]





RE: 380v/660v delta/star meaning
Star at 660 Volts
9.2 Amps at 380 Volts delta connected.
4.3 Amps at 660 Volts star connected. But the ratio is incorrect. Are you sure that the nameplate is not A 9.2/5.3
That would be a correct star/delta ratio.
Bill
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"Why not the best?"
Jimmy Carter
RE: 380v/660v delta/star meaning
another question is that if it has been connected in star at 380v for 12 hours what impact would be occured upon the motor?
RE: 380v/660v delta/star meaning
RE: 380v/660v delta/star meaning
CR
"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]
RE: 380v/660v delta/star meaning
So as mentioned, with no load on the motor, it usually will accelerate and run, appearing normal. But as soon as you apply a load, it I'll begin to fail.
"You measure the size of the accomplishment by the obstacles you had to overcome to reach your goals" -- Booker T. Washington
RE: 380v/660v delta/star meaning
the motor was run on load most of time and its protection operated at 7 A and made the motor trip two times. Before tripping when it seems to be normal it was drawing current 3A. It was loaded fully like as 4kw motor can bear load. load was continuous and the motor was run through Frequency Inverter.
RE: 380v/660v delta/star meaning
As Jeff mentioned earlier, the torque will be reduced and the motor may tend to stall.
Mark Empson
Advanced Motor Control Ltd
RE: 380v/660v delta/star meaning