9 circuits to connect the voltage relay correctly
9 circuits to connect the voltage relay correctly The phase voltage monitoring relay allows you to immediately turn off the electricity after the meter in case of an emergency - a power surge. This device is used in single-phase and three-phase power…
9 circuits to connect the voltage relay correctly
So, the simplest wiring diagram from the opening circuit breaker in the apartment to the voltage monitoring relay is as follows:
In this case, the network is single-phase (220 V) and the load is not more than 7 kW, so there is no need to connect a magnetic switch or contactors to Din-rail.
If the load is more than 7 kW, it is recommended to connect through the starter, as shown in the second circuit of the relay PH-113:
Immediately draw your attention to the fact that in addition to surge protection devices in the switchboard there must be an RCD or diffusion to protect the residents of the house from leakage currents that can cause electric shock. The schematic diagram for connecting a voltage relay and an RCD (or differential machine) looks something like this:
If you have a three-phase 380 V network in your private house, you can connect the protection device according to one of the schemes:
The first is recommended to use if there are no three-phase consumers in the house – a powerful electric stove or 380 V boiler. If you use three-phase electric motors, you must protect them with a suitable voltage relay, for example, RNPP-311 or RKN 3-14 -08, schemes we offer you:
As you can see, in both versions there is an additional magnetic starter, which allows switching high loads (more than 7 kW). In addition, the starter allows you to remotely control the protection, which makes this voltage relay connection diagram very convenient!
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