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TOPIC: how to calculate suitable MCB(miniature circuit breaker) for SM2315D?

how to calculate suitable MCB(miniature circuit breaker) for SM2315D? 1 year, 1 month ago #2083

  • zslim
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how to calculate suitable MCB(miniature circuit breaker) for SM2315D?

Re: how to calculate suitable MCB(miniature circuit breaker) for SM2315D? 1 year, 1 month ago #2086

  • csearcy
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Continuous current at nominal power for that motor is 5 amps. You can look at the torque curve on our website for an SM23165D motor. It will show the power in wattage for different voltage supplies.

Re: how to calculate suitable MCB(miniature circuit breaker) for SM2315D? 1 year, 1 month ago #2091

  • zslim
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the calculation is not 170watt/48VDC= 3.54Amp?
I=power/volt
how you get the 5Amp?

Re: how to calculate suitable MCB(miniature circuit breaker) for SM2315D? 1 year, 1 month ago #2092

  • csearcy
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The 5Amp came from the specification sheet for the SM23165D motor (which is the Class5 version of the older SM2315D) on the website.

Re: how to calculate suitable MCB(miniature circuit breaker) for SM2315D? 1 year, 1 month ago #2093

  • zslim
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so, it's mistake on graph shown?

Re: how to calculate suitable MCB(miniature circuit breaker) for SM2315D? 1 year, 1 month ago #2094

  • csearcy
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The 48VDC is the supply voltage to the integrated voltage switch mode drive. That motor can actually pull more than 10Amps if the rotor is locked. The speed/torque chart came from the dynamometer. I'd go with the 5Amp for a good safety factor.
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