Further to my question of June 15th, 2002.
The two 250 h.p. motors are Joy dual voltage star/delta 950/550 volts, the transformer feeding them is a 1mva 1100 volts Brush transfomer. We in Canada use U.K.transformers and switchgear because of our code. These motors are larger than we used before...
We are currently using two 250 h.p. motors on a coal cutting machine that are rated for 950 volts. Our power supply is 1100 volts, so my question is, is the increase in voltage hence torque going to increase the H.P. the motors develope, because we are encountering overload trips and the motors...
