Impulse Strength of High Voltage Motor Coil Turn Insulation
- 1 December 1986
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Energy Conversion
- Vol. EC-1 (4), 130-134
- https://doi.org/10.1109/tec.1986.4765786
Abstract
Breakdown of the turn insulation in large ac motors eventually leads to the failure of the stator winding. The turn insulation can fail if the motor coils are subjected to steep-fronted surges. The impulse strength of the turn insulation was determined for fifty-three typical coils procured from different manufacturers and tested singly in air. The coils had six different insulation systems and their specifications (voltage, power, size, turns, strands etc) cover a very wide range. Most coils were found to have an impulse strength exceeding 5 times peak line-to-ground voltage (5 pu).Keywords
This publication has 3 references indexed in Scilit:
- DiscussionIEEE Transactions on Electrical Insulation, 1985
- Investigation of Turn Insulation Failure Mechanisms in Large AC MotorsIEEE Transactions on Power Apparatus and Systems, 1984
- Testing of Electrical Machine Stator Coils Using Sharp-Fronted Impulse VoltageIEEE Transactions on Electrical Insulation, 1984