Connection instructions for the voltage monitoring relay

What is the advantage of this protection?

To begin with, let's talk briefly about what the connection of the voltage control relay is better than the classical stabilizer installation.

• Firstly, the device in question is more compact and does not take up much space in the apartment electrical switchboard. As for the stabilizer, to connect it, you need to allocate a separate place, in addition, the installation of this device is more labor-intensive.
• Secondly, the voltage relay is an order of magnitude faster, which is its main advantage. The fact is that with a significant deviation of the voltage from the nominal, the stabilizer may need up to 1 second of time. During this time, your household appliances can already burn out. In turn, the voltage relay is triggered for thousandths of a second and instantly turns off the power on the shield.
• Third, the cost of a compact product is several times less than a quality stabilizer. So why pay more if you can connect an alternative protection option?

As you can see, with the existing threat of overvoltage in the network, it's best to perform the relay connection in the apartment yourself. However, this does not mean that the stabilizer does not make sense to use. The fact is that this device allows you to equalize the voltage in the network, if it is in the range from 140 to 250 volts( each model has its own setpoint) without power failure. We recommend that in case of a problem in the network, connect both types of protection together with the residual current device( RCD) and the circuit breaker.

It should also be noted that overvoltage in the network is most often caused by a break of the zero wire in the access panel. As a consequence, the phases are skewed and a situation may occur that you have 300 volts in your apartment, and your neighbors have 110-120.And that and the other option is not comforting for household electrical appliances.

How to install

So, we have considered the purpose and benefits of this type of protective automatics. Now let's talk about how to properly connect the voltage monitoring relay to a single-phase network and install it on the DIN rail with your own hands! For the instruction to be more convenient and understandable for you, we will provide it step-by-step with the photos with examples of correct installation:

1. Disconnect the electric power on the lead-in shield.
2. Set the new type of relay on the DIN rail so that the housing is positioned as close as possible to the input circuit breaker after the
3. counter. Determine where the machine is in phase and where zero is using the indicator screwdriver.
4. The phase wire from the machine to the apartment( or house) is cut by itself in the middle so that both parts of the wire can be connected to the voltage control relay.
5. Connect the wire that goes from the machine to the terminal marked "IN" with a cut end.
6. The remaining cut wire is fixed in the "OUT" terminal. Thus, the flow of current from the input on the floor to the apartment wiring should not occur directly, but through a protective relay.
7. With a small piece of electrical wire of a suitable cross-section, connect the remaining "N" terminal to the zero bus in the distribution board. Ultimately, the wiring diagram in a 220V single-phase network should look like this:
8. Check the quality of all connection points and if the wires are securely fastened in the connectors, turn on the power on the input machine.

That's the whole technology of connecting the voltage relay to the circuit breaker with your own hands. As you can see, there is nothing complicated and even a kettle in the electrician will be able to connect the device! We draw your attention to the fact that there are other types of protective relays of a new type that can be represented by a product that looks like a tee with a digital display. This version of the design allows you to protect one separate electrical appliance in the apartment from overvoltage. Installation and connection of this protection option is not difficult, so we will not stop here!

• What is better to put: a diafi-automat or a RCD
• Wiring diagram of a voltage relay
• Why the washing machine beats current