Thermally Protected Motor

Thermal winding protection for motors is a key component in operational automated equipment.

Thermally protected motor.

Different types of thermal protection exist and are identified by a tp code tpxxx which indicates. The words thermally protected on a motor nameplate indicate that a thermal protection device is an integral part of the machine and when properly applied will protect it from dangerous overheating. For motors equipped with thermal protectors the words thermally protected if the motor provides all the protection described in mg 1 12 52. This creates a level of protection against excessive winding temperature that could eventually lead to permanent winding insulation breakdown and failure easa has a nice page with some good pictures of typical motor failures.

When you see the term thermal protection or thermally protected used in the description of an electric motor it refers to a device found within the motor or motor compressor that is designed to prevent dangerous overheating that can cause motor failure. There is one cylindrical stator and a three phase winding is symmetrically distributed in the inner periphery of the stator. Such as thermal overloading or overheating can cause insulation failure and damage to the winding so for proper motor thermal overload protection the motor must be protected against the following conditions. The type of thermal overload for which the thermal protection is designed 1 digit.

Mechanical overloading stalling of motor shaft low supply voltage single phase of supply mains imbalance of supply mains. In other words thermally protected motors are an exception to the rule. If the motor has this added special layer of protection the. Tp is the abbreviation for thermal protection.

Due to such symmetrical distribution when three phase power supply. That means that there s a switch which protects the motor of overheating. For understanding motor thermal overload protection in induction motor we can discuss the operating principle of three phase induction motor. For instance if on the nameplates is a marking.

See mg 1 1 71 and mg 1 1 72. The degree of protection that an internal protection device provides is classified in the iec 60034 11 standard.