O/L Problem in Drive

dear ,

Drive ... if there is no electronics fault, pl. check the following

1. loose connections in motor terminals up to drive terminal.

2. lugs condition of power cable, if it is oxidised, need replacement, re connections.

tripping is due to the third harmonics flowing in the drive electronics.

regards

The N2 drive can display multiple OL faults. One is Motor OL, the other is Drive OL. Which type are you getting?

motor ol

HI dear

the solution of yoour problem is so simple just put the circuit out of the inverter n wash it with thinner n then change the I.G.B.T module inside and put it back on the work feild it will be ok then thnkz to me at Farri_1433@yahoo.com got it

Hopefully the OP understands this is a sarcastic joke.

---any ideas on what a cetrifuse might be?? Or am I just ignorant.

Centrifuses are complicated loads to drive via drives. If the other suggestions does not work you may want to try a resistor on the drive to prevent regenerative feedback from the centrifuse (via the motor) to the drive.

Centrifuses once on speed become a flywheel and starts driving the motor (resonate), which in turns generate a back emf to drive. The drive then may see this as an overload condition (not to fimiliar with the N2).

The solution is to connect a resistor (manufacturer of drive to advise the resistance value and watt rating) to the dc circuit of the drive. The resistor will absorbed the spikes generated back to the drive.

That actually turns up as an Over Voltage to the drive, not an Over Load.

A Centrifuge is as mentioned, a large flywheel load. It has a lot of inertia to get it moving, but once moving it doesn't take a lot of power to keep it moving. So if the VFD is tripping on OL during acceleration, then you are attempting to accelerate too fast. If it is tripping on OL after it is running at full speed, you have too small of a motor. This is assuming you have properly programmed the VFD for the motor parameters. If you did not do that, it may be just a simple issue of properly setting up the VFD for the application.