Working principle of a magnetic contactor The magnetic contactor works on the principle of the closing of the main contacts as a result of the coil energization and the opening of the main contacts as a result of the coil de-energization. Therefore, the contacts close, and the springs provide power to the contacts.
What is the working principle of contactor?
Operating Principle of a Contactor:The current passing through the contactor excites the electromagnet. The excited electromagnet produces a magnetic field, causing the contactor core to move the armature. A normally closed (NC) contact completes the circuit between the fixed contacts and the moving contacts.
What is the function of a magnetic contactor used in protection system?
Magnetic contactors act as a safeguard to protect the power supply and the motor. Magnetic contactors are sometimes considered as circuit breakers due to their similarity of shape with the circuit breakers but their functionality is different than that of circuit breakers.
What is a contactor and how does it work?
A contactor is an electromechanical switch whose function is to make or break the connection between the power supply and the load. The contactor is electrically controlled and usually powered at a much lower level than the switched circuit.
What are the parts of magnetic contactor?
A contactor consists of three basic parts: the operating coil, the associated magnetic circuit and the contacts that are actuated by the coil.
How does a magnetic starter work?
How Does a Magnetic Motor Starter Work? Magnetic starters rely on electromagnets to function. The overload relay opens the control voltage to the starter coil if it detects an overload on a motor. A control circuit with momentary contact devices that are connected to the coil executes the start and stop function.
What is the working principle of relay?
Relay works on the principle of electromagnetic induction. When the electromagnet is applied with some current it induces a magnetic field around it.
What is NO and NC In contactor?
Normally open(NO) and Normally closed (NC) are terms used to define the states of switches, sensors or relay contacts under when its coil is not excited.
What is a magnetic contactor or magnetic control?
A magnetic contactor is a device that is powered by magnetism. Used to open and close the contacts in the motor control circuit, may also be called a magnetic switch or a contactor. Through it, we can easily control heavy loads such as high-capacity motors.
What is the importance of contactor?
A contactor is a large relay, usually used to switch current to an electric motor or another high-power load. Large electric motors can be protected from overcurrent damage through the use of overload heaters and overload contacts.
What is main contactor?
A contactor is one of the main electrical circuit parts, which can stand on its own power control device or a part of a starter. They are used to connect and break power supply lines running through power lines or repeatedly establish and interrupt electrical power circuits.
What type of magnet is a contactor?
Magnetic contactors are a form of electrical relay found on most electrically powered motors. They act as a go-between for direct power sources, and high-load electrical motors in order to homogenize or balance out changes in electrical frequency which may come from a power supply as well as to act as a safeguard.
What is the working principle of magnetic contactor?
Magnetic Contactor Working Principle When an electric current flows to the magnetic field coil located in the center leg of the coil core. This will create a magnetic field in which the magnetic field forces overcome the spring force to cause the steel core to move down in this state (ON).
How does a magnetic ContaCOr work?
How a Magnetic contacor Works. The function of a contactor or motor starter is simple, when the AC supply goes to the contactor coil, the coil make a strong magnetic field and field pulls the iron core to the coil and make a electrical contacts.
What voltage do coil contacts work with?
Depending on the type of the contactor, the coil can also work with AC voltage. For example, the contactor’s coil may work with a 24, 120, or 220-volt AC power. So before connecting the wires to the coil, you first need to check the coil voltage. Most of the contactors, like the one we have here, work with a 24-volt DC power.
What voltages do contactors work with?
For some other contactors this coil may work with different voltages such as 12-volt DC or maybe 220-volt DC. Depending on the type of the contactor, the coil can also work with AC voltage. For example, the contactor’s coil may work with a 24, 120, or 220-volt AC power.
