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Protective device for pump motors on a fire sprinkler systems

Philip Baker

Dear all, I have just joined the forum, as I have a circular question.

Do fuse switches/switch fuses in the LV SWB need to be used as the supply for the pump motors on a fire sprinkler systems, or can these devices be changed for MCCB's?

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    What happens if the 230v AC nominal or between 216.2V and 253V becomes 207v AC as being proposed? 

     - Will the cartridge fuse or MCCB (Moulded Case Circuit Breaker) perform as expected for time?


     - If you use a device designed for 230V on a 207V supply the device might draw more current to compensate for the lower voltage, which could cause the fuse to blow even during what should be normal operation?

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  • 0

    What happens if the 230v AC nominal or between 216.2V and 253V becomes 207v AC as being proposed? 

     - Will the cartridge fuse or MCCB (Moulded Case Circuit Breaker) perform as expected for time?


     - If you use a device designed for 230V on a 207V supply the device might draw more current to compensate for the lower voltage, which could cause the fuse to blow even during what should be normal operation?

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