Why Have an Insulation Resistance Testing Program?
A regular program of insulation resistance testing is strongly recommended to:
- Prevent electrical shocks
- Assure safety of personnel
- Reduce or eliminate down time
- Detect deterioration of insulation
- Evaluate the quality of repairs
This type of program is helpful in identifying when to schedule repair work such as: vacuum cleaning, steam cleaning, drying and rewinding. Quality assurance standards are met before the equipment is put back into operation through proper testing.
What Causes Insulation Failure?
Some of the more common causes of insulation failure Include: excessive heat or cold, moisture, dirt, corrosive vapors, oil, vibration, aging and nicked wiring.
What Tests Are Used to Detect Insulation Deterioration?
There are numerous maintenance tests for assessing insulation quality. The three tests discussed here are used primarily to test motor, generator and transformer insulation.
What Equipment is Necessary for Conducting Insulation Resistance Tests?
- Megohmmeters like AEMC 5060, 6550 and 6555.
- Temperature indicator
- Humidity meter (not necessary if equipment temperature is above the dew point)
Find out how to conduct the three types of tests performed
AEMC Megger Comparison Chart
JM Test Systems rents and sells a large supply of AEMC and meggers and Megohmmeters. Let us assist you for all your Electrical Testing needs. Stop by our website today for a free quote or give us a call at 800-353-3411.
