Thermal Overload Relay For Single Phase Motor

Overload relay is a device that can protect a motor from overloads phase failure and phase imbalances.

Thermal overload relay for single phase motor.

1 15 the set current for the overload relay can be raised by 15 compared to full load current or to the service factor amps sfa which is normally indicated on the nameplate. Thermal overload relays are economic electromechanical protection devices for the main circuit. The t16 thermal overload relays are economic electromechanical protection devices for the main circuit. They offer reliable protection for motors in the event of overload or phase failure.

When one phase of the supply is out of service the remaining two phases draw more current to maintain the required load torque and this leads to overheating of the motor. Based on the principle of operation they are classified into thermal and electronic overload relay. However if motors are designed with a service factor which is then shown on the nameplate eg. The overload relay is designed so the current to the motor is shared between phases so if you only wire up one phase then all the motor current goes through one of the contacts on the overload and you can.

For example an overload relay can trip without a circuit breaker tripping. This single phase overload relay is made using optimum quality material and modern machine. The thermal overload relays are three pole relays with bimetal. Overload relays protect the motor.

Flexible mounting ensures that they can be installed on a contactor panel or separate enclosure. The overload relay types include fixed bi metallic interchangeable heater bimetallic and electronic. High tensile strength robust. More specifically circuit breakers and fuses are designed to detect when there is too much current in the circuit while overload relays are designed to detect if a motor is overheating and will open the circuit if the motor gets too hot.

Single phasing also causes overload thermal of the motor. Our esteemed clients can avail these products at feasible rates. The devices have trip class 10. Eaton offers a wide range of overload relays to provide full motor protection.

If the motor is connected in star 440 v 60 hz the overload relay then has to be set to 3 1 a. Dol starter control and power wiring by using a fuse contactor overload relay motor. Banking on the skills of our talented team of professionals we are instrumental in presenting a wide assortment of single phase overload relay. Offer reliable protection for motors in the event of overload or phase failure.

Single phase motor overload protection previously we discussed what a magnetic motor starter is a contactor and an overload relay.