Modern electrical protection relays are mainly micro processor based but still electromagnetic relay holds its place.
Electromagnetic relay working pdf.
The electromagnetic relay operates largely as per the principle of electromagnetic induction which also means that as the electric current is passed on the conductor the conductor behaves like a magnet.
So before going through detail of protection relay system we.
A relay is an electromagnetic switch that is used to turn on and turn off a circuit by a low power signal or where several circuits must be controlled by one signal.
Such relays may be actuated by d c or by a c quantities.
Electromagnetic relays are those relay which operates on the principle of electromagnetic attraction.
Design of electromagnetic relay.
The electromechanical relay consists of various parts such as movable armature movable contact stationary contact or fixed contact spring electromagnet coil the wire wrapped as coil with its terminals represented as c which are connected as shown in the below figure to form electromechanical relay.
The magnetic field then uses for opening and closing the switch and for performing the mechanical operation.
It will take much longer time to replace all electromagnetic relays by micro processor based static relays.
It is a type of a magnetic switch which uses the magnet for creating a magnetic field.
Electromagnetic relays are those relays which are operated by electromagnetic action.
The working principle of electromagnetic relays is not complicated and it operates mainly according to the principle of electromagnetic induction.
Then the armature generates a suction force to making.
In electromagnetic attraction relays there is a coil which energises an electromagnet when the operating current becomes large the magnetic field produced by an electromagnet is so high that it attracts the armature or plunger making contact with the trip circuit contacts these are the simplest type of relays.
We know that most of the high end industrial application devices have relays for their effective working.
This operating principle applies only to relays actuated by alternating current and in dealing with those relays we shall call them simply induction type relays.
So before going through detail of protection relay.
Magnetic charge method and virtual work method but have several advantages over the traditional approaches.
Modern electrical protection relays are mainly micro processor based but still electromagnetic relay holds its place.
Electromagnetic relays are those relays which are operated by electromagnetic action.
Article pdf available.
Electromagnetic induction relays use the principle of the induction motor whereby torque is developed by induction in a rotor.
Switching on the power in the low voltage control circuit the current goes through the coil of the electromagnet to generate a magnetic field.
It will take much longer time to be replaced the all electromagnetic relays by micro processor based static relays.
