What RCD input can be put on 11 kW load?
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of viewingHello! Tell me which RCD to enter can be put on a private house of 98 sq.m., which consumes 11 kW?
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Hello! Tell me which RCD to enter can be put on a private house of 98 sq.m., which consumes 11 kW?
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Good afternoon, Max.
Most likely, your house has a single-phase input. To select the RCD by current, which the device can skip, you need to convert 11 kilowatts to amperes. You do not give the composition of power consumers, so you can rely on the average value of cos φ for cottages, equal to 0.9.
Then the current will be equal to - I = P / (U * cos φ) = 11000 / (220 * 0.9) = 56 amperes.
Typically, an introductory RCD is a fire protection, that is, it has a protection setting of 100 or 300 milliamps. For you, the best option is an RCD for 100 milliamps with a rated current of 63 amperes. The previous “size” is 100 mA / 40 A, and the next is 100 mA / 100 amperes.
Yandex.Market gives out the cheapest (2350 rubles) Italian UZO "ABB FH202". By entering the query “single-phase single phase 100 milliamps 63 amperes”, you will get other options.