Electromagnetic Relay Working Pdf

Magnetic charge method and virtual work method but have several advantages over the traditional approaches.

Electromagnetic relay working pdf.

We know that most of the high end industrial application devices have relays for their effective working. 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. The working mechanism of electromagnetic relays is simple to understand. Modern electrical protection relays are mainly micro processor based but still electromagnetic relay holds its place.

It will take much longer time to replace all electromagnetic relays by micro processor based static relays. Electromagnetic relays are those relay which operates on the principle of electromagnetic attraction. 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. Electromagnetic relays are those relays which are operated by electromagnetic action.

Modern electrical protection relays are mainly micro processor based but still electromagnetic relay holds its place. Such relays may be actuated by d c or by a c quantities. The magnetic field then uses for opening and closing the switch and for performing the mechanical operation. So before going through detail of protection relay system we.

Then the armature generates a suction force to making. Switching on the power in the low voltage control circuit the current goes through the coil of the electromagnet to generate a magnetic field. Electromagnetic induction relays use the principle of the induction motor whereby torque is developed by induction in a rotor. Article pdf available.

Electromagnetic relays are those relays which are operated by electromagnetic action. 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. 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. 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 as you switch on the power in the low voltage control circuit the. It is a type of a magnetic switch which uses the magnet for creating a magnetic field. It will take much longer time to be replaced the all electromagnetic relays by micro processor based static relays. Design of electromagnetic relay.