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  • Users: Yaya
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  1. Yaya

    one circuit breaker for 2 motors

    I am used to seeing a circuit breaker, or fuses, used with a contactor and overload relay in motor control circuits. However, we've taken delivery of a feeder conveyor which uses a large circuit breaker to supply the two motors on the conveyor, with a contactor and overload relay for each...
  2. Yaya

    ip rating of indoor switchboards

    Is there any standard recommending certain IP ratings for indoor switchboards (motor control centres)? I know that for indoor boards IP41 is quite standard with board manufacturers. Also, what proof can one ask of a manufacturer to satisfy oneself that his boards comply to his claimed IP rating?
  3. Yaya

    CT overloading

    Can I 20/1 CT(probably 2.5VA, or maybe 5VA) be used for measuring current on a 380V motor with a FLC of 23A. I am not worried about accuracy, but rather whether the CT might fail in service. The only connected load consists of 2 ammeters, one situated about 100m away via 2,5mm^2 cable. The CT...

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