240 v genset, 208 v motor
240 v genset, 208 v motor
(OP)
I have a 240 volt, 8 kw portable genset that needs to power a 208 v hoist motor. Both are single phase. The genset is putting out 246 v at no load and is burning up the motor.
Would you expect this to occur? The motor has to start with full load applied (it's a hoist). Do portable gensets typically have an adjustable voltage regulator?
Or am I barking up the wrong tree?
Sorry, I'm an ME.
Would you expect this to occur? The motor has to start with full load applied (it's a hoist). Do portable gensets typically have an adjustable voltage regulator?
Or am I barking up the wrong tree?
Sorry, I'm an ME.





RE: 240 v genset, 208 v motor
Are you sure the hoist is single phase not 3 phase?
RE: 240 v genset, 208 v motor
----------------------------------
If we learn from our mistakes I'm getting a great education!
RE: 240 v genset, 208 v motor
RE: 240 v genset, 208 v motor
A typical genset is a Generac XP8000E. Details are at:
htt
The motor is a proprietary design and more attention was paid to the under-voltage performance than over-voltage, since the power cords tend to be quite long.
The current plan is to use a buck transformer. Seems easier than having field personnel monkeying with the wiring or regulator.
RE: 240 v genset, 208 v motor
Many of those small sets use capacitor excitation.
The voltage is pretty linear with respect the the amount of capacity in the usable voltage range.
You may replace the original capacitor with one of 120/146 of the value of the original cap. The voltage should be right on 120 Volts (plus or minus any tolerance errors in the capacitors.)
Use a cap of the same voltage rating.
DO NOT USE A MOTOR STARTING CAPACITOR.
Many motor starting capacitors are not suitable for continuous use.
If the unit has an AVR (doubtful) it is just a matter of tweeking an adjustment with either an insulated screwdriver or a non insulated screwdriver and extreme caution.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: 240 v genset, 208 v motor
RE: 240 v genset, 208 v motor
Bill
--------------------
"Why not the best?"
Jimmy Carter