Paper Title
Voltage Distribution Among Turns And Winding Of High Voltage Motor
Abstract
High voltage motors are normally used
to drive water pumps, thermal power stations as
auxiliaries, fans and other auxiliary items. The steep
fronted transients such as switching over-voltages
originate at the terminals of circuit-breaker. Failures
of many high-voltage motors have been blamed on
switching over-voltages. The increasing use of
circuit- breakers requires the protection from
switching over-voltage caused by prestrike and
restrike of the switch contacts. The sloping or
limiting of the wave-front provides the protection for
turn to turn insulation and ground insulation by
distributing the switching surge voltage across many
turns adjacent to the line end. It is possible by using
the suitable protective devices such as capacitance,
resistance-capacitance. Impulse voltage of 225 kV,
0.1/50 µs for 6.6 kV motor is generated and fed to the
distributed winding of motor with protective devices
and measured the line end coil and turn voltages. This
paper presents a computer simulation study of
switching and impulse voltage using MATLAB
software package.
Index Terms—Steep Fronted Transients and
Simulation Tool