EEM 4.6-3 Protection for electrical machines 300W

Squirrel-cage motors are designed to operate at constant load. Changes in the load state but also high starting currents can lead to the impermissible and excessive overheating of the motor. Sensors monitor the motor‘s temperature and current consumption. They activate protective circuitry like motor circuit-breakers, motor protective relays or thermistor relays.

Training contents:

• Selection, installation and configuration of various motor protection systems
• Motor circuit-breaker
• Motor protection relay
• Thermistor protection
• Effect of various operating modes on the heat build-up in the motor
• Tripping characteristics of the protection systems
• Protection against impermissible operating states