Reactors on output side of A-B 1336 Drives
Reactors on output side of A-B 1336 Drives
(OP)
Hello all,
We use a large number of A-B 1336 drives at our facility and we use line reactors on the output side of our drives but not the input,is this the industry standard as i would have thought that on the input side it would have made the drive less likely to have trouble from peaks and transients from the incoming supply.
We use a large number of A-B 1336 drives at our facility and we use line reactors on the output side of our drives but not the input,is this the industry standard as i would have thought that on the input side it would have made the drive less likely to have trouble from peaks and transients from the incoming supply.





RE: Reactors on output side of A-B 1336 Drives
"Venditori de oleum-vipera non vigere excordis populi"
RE: Reactors on output side of A-B 1336 Drives
RE: Reactors on output side of A-B 1336 Drives
Voltage transformation, adequate voltage input for VFD
Phase shifts, depending number of VFD pulses
Electrical isolation, between power source and VFD
Harmonic reduction, impedance between power source and VFD
Fault current limit to the converter, impedance does
There is another problem, Neutral Shift, in VFD current source with isolation reactors or without isolation transformer, the motor windings insulation is subject to double the nominal phase to neutral voltage stress.
This may not cause an immediate motor failure, but life is shortened, is important because standard existing motors can not be safely applied to current source VFD.
If an isolation transformer, delta-wye not grounded is installed, the voltage generated is shared between isolation transformer secondary neutral and motor neutral.
Because the motor winding capacitance is bigger than transformer winding capacitance, almost all the voltage appear on the transformer, good thing, because transformer's secondary isolations much higher than motor winding isolation.
RE: Reactors on output side of A-B 1336 Drives
"Venditori de oleum-vipera non vigere excordis populi"
RE: Reactors on output side of A-B 1336 Drives