Schemes correct connection voltage relay
The relay control voltage (RNA) is intended to protect the equipment from high or low voltages. It is used in three-phase and single-phase networks. Next I'll show you the correct voltage relay circuit wiring.
Content
How does the voltage monitoring relays
Wiring diagrams ILV
conclusion
How does the voltage monitoring relays
The algorithm works ILV concluded as follows: a relay connected to the network, monitors the voltage (Standard 230). Once the network is a jump or a voltage dip that overcomes setting ILV, relay operation occurs. It disables the protected site. Then, the relay waits until the mains voltage is restored to normal parameters and after certain time (defined as the interval setting) comes back to the connecting portion network.
That's what ensured the protection of expensive equipment. In order to relay to function properly, it must be connected correctly, then let's examine the scheme competent connections.
ILV connection scheme
So, the easiest way to connect voltage relay single phase under load, not exceeding 7 kW, is implemented as follows:
If the load exceeds the value of 7 kW, the direct connection can not be used ILV. This requires the use another switching device - namely, a magnetic contactor actuator. In this case, wiring diagram is as follows:
Schematic diagram of a home network using RCN, RCD and circuit breakers Buda look like this:
These procedures apply to the single-phase network, now let's look at the connection options to the three-phase mains voltage of 380 volts.
At every phase of its relays of voltage control:
This scheme is relevant when the network no three-phase consumers, for example, powerful electric or motor.
If such consumers you have, it is best to use a three-phase ILV and wiring diagrams will be as follows:
conclusion
This is the most common scheme of correct connection voltage control relays. As you can see the application of the magnetic actuator true when the load power exceeds the figure of 7 kW. If the article was useful to you, then put his finger up and thank you for your attention!