Electric devices like circuit breakers gather moisture and dirt over time, which weakens their insulation systems- especially if you don’t maintain them regularly. And if you use them in hostile environments that have corrosive substances (like chlorine in water plants or H2S in oil industries), the chances of system breakdown get even higher. What are some common DC tests that you can do to make sure your circuit breakers continue running smoothly?
ANSI/NETA MTS2011 mentions some tests that should be conducted regularly on circuit breakers.This standard also gives the result values that the tests should produce. There are three DC tests that are recommended by NETA (International Electrical Testing Association):
- DC Overpotential test to check the insulation system
- Insulation resistance test to examine the wiring of the system
- Contact Resistance analysis to gage the current path resistance