Ultra Motors NEMA Premium Efficient Industry-leading inverter-duty capability Advanced high thrust bearing system
Industry leading coil insulation system
GE pump motors are manufactured standard with a GEGARD2400 insulation system. This system exceeds NEMA MG1-31 (which is 3.1 times the nameplate voltage) for motors operating on inverters.
This insulation system is comprised of class H materials. The combination of this and the varnish process provides a typical Corona Inception Voltage of 2400 volts peak with a rise time of 0.1 seconds GE engineers found a better way to air cool bearings in larger frame TEFC motors.
The design improvements result in an amazing ~30OC temperature reduction helping to dramatically extend bearing and winding life.