Unique Overload Relay Connection Diagram

If anyone of the phase is interrupted the current through the other two phases rises to 1 73 times the normal value.

Overload relay connection diagram. Note that always connect the earth wire to the electric motor body. Whenever the flow of current toward the motor is more than what the heaters is charged for the overload explores later than some seconds. In the above contactor wiring diagram i did not shown any type of step down transformer or neutral wire for magnetic contactor coil because i use a 440 volts contactor in above circuit diagram however you can learn some more from below links.

The overload relay connection diagram underneath shows the power and control connection diagram of the overload relay in a dol configuration for a 2. One main security characteristic of this relay is that stops the motor from instantly restarting. How to wire a 3 phase motor with contactor and overload relay.

It shows the components of the circuit as simplified shapes and the facility and signal associates together with the devices. Thermal overload relay wiring diagram wiring diagram is a simplified welcome pictorial representation of an electrical circuit. Class 10 class 20 and class 30 overload relays can be explored later than 10 secs 20 secs and 30 secs correspondingly.

Hence the overload relay gets heated up and it. As an example if we have to select the range of overload relay for a motor with a full load current of say 10 amperes it should be from 7 to 12 amperes or as near to it as possible. During normal operation the current flowing through each pole of an overload relay to the motor remains the same at a time.