What is the difference between DCRM & CRM test of a circuit breaker?

What is the difference between DCRM & CRM test of a circuit breaker? and also , please write the test procedures?


asked 9/8/2012
JANAKI RAM3
JANAKI RAM

2 Answers

By testing of CRM test we have measured only contact resistance between two pole and by testing of DCRM test we have measured contact resistance between two pole also but coil current and breaker timing test should be taken by testing DCRm test. 

answered 1 month ago karan pankhania 2
karan pankhania

CRM is only contact resistance measurement and DCRM is dynamic contact resistance measurement - this is circuit breaker closing time resistance.

answered 9/17/2012 tankhasmukh 2
tankhasmukh
edited 9/21/2012
Steven McFadyen234
Steven McFadyen

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