9 circuits for correctly connecting a voltage relay

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 Volts) and the load is not more than 7 kW, so there is no need to connect magnetic switch or contactor to din rail. If the load is more than 7 kW, it is recommended to connect through the starter, as shown in the second PH-113 relay connection diagram:

Immediately draw your attention to the fact that in addition to surge protection devices In the switchboard there must be an RCD or a difavtomat to protect the inhabitants of the house from leakage currents that can cause electric shock. The schematic diagram of connecting a voltage relay and an RCD (or a differential machine) looks something like this:

If you have a three-phase 380 Volt network in your private house, you can connect the protective device according to one of two schemes:

The first is recommended to be used if there are no three-phase consumers in the house — a powerful electric stove or a 380 V boiler. If you use 3-phase electric motors, you must protect them with an appropriate voltage relay, for example, RNPP-311 or RKN 3-14 -08, schemes of which we provide you with:

In addition, we recommend that you familiarize yourself with video tutorials in which the entire installation process is clearly explained:

As you can see, in both versions there is an additional magnetic starter, which allows switching high loads (over 7 kW). In addition, the starter allows you to remotely control the protection, which makes this voltage relay connection scheme very convenient!