ivan.balashov

NFPA 25: Replacement of a Power Monitor

Discussion created by ivan.balashov on Jan 31, 2020
Latest reply on Jan 31, 2020 by cdafd

Colleagues, hope all of you are well,

 

According to table 8.6.1 of NFPA 25, in case of replacement of a power monitor, I shall "Perform six operations of the circuit breaker/isolation switch disconnect (cycle the power on/off)".

 

Usually, power monitors are powered by separate automatic breakers connected to control circuits power supply grid (say, 220 V DC or so) and position of contacts of the main circuit breaker has no any influence on the monitor. Can anybody explain me, why should I close and open the circuit breaker six time having the isolation switch disconnected?

 

Kindest regards,

 

Ivan Balashov

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