Over Current Relay Circuit Diagram

Working principle of over current relay.

Over current relay circuit diagram.

Double click the block. Take the subsystem block from commonly used blocks. In an over current relay or o c relay the actuating quantity is only current there is only one current operated element in the relay no voltage coil etc. Depending on the time of operation the overcurrent relay is categorized into following types.

Fuses circuit breakers overcurrent relays current limiters temperature sensors and solid state power switches are used against overcurrent protection devices. It is not present in simulink library so follow the steps given below. Are required to construct this protective relay. Thermal overcurrent relay magnetic overcurrent relay.

The two over current relays in r and b phases will respond to phase faults. Draw the following circuit diagram in the newly opened window. It protects the equipment of the power system from the fault current. A new window will open.

Circuit diagram of instantaneous overcurrent relay in simulink. In an over current relay there would be essentially a current coil when normal current flows through this coil the magnetic effect generated by the. Since the normally closed contact is empty the led is off when there is no. 2 no o c relay 1 no e f relay for over current and earth fault protection.

The overcurrent relay is defined as the relay which operates only when the value of the current is greater than the relay setting time. In addition a thermal magnetic circuit breaker is used for both overcurrent and overload protection. Earthing of both will short circuit the e l relay and make it inoperative for faults. At least one relay will operate for fault involving two phase.