The metal shell of 3MP and the terminal are integrally formed, which can accommodate the pre-calibrated Ainol jump-type bimetal disc bottom plate. For the current value of the motor, the S-shaped or spiral-shaped resistance heating element with different resistance values is increased. Sensitivity. The advanced contact system, the bimetal disc and the bottom plate each have a contact, and work together with the disc to ensure a longer service life and higher reliability. The connection terminal configuration can be customized according to user needs. Ainuo Technology provides a series of standard wire configurations, which can be customized by users. The code of the model code and the color of the casing lead can be selected and customized according to user needs.

The working principle of 3MP is simple and effective. The current passing through the protector and the temperature of the surrounding components make the protector operate. When the disc reaches the preset temperature or the current reaches the set value, the circuit is disconnected. When the device temperature drops to a safe value, the contact automatically resets. The bimetal disc can provide good thermal sensitivity and current sensitivity under overload conditions. In the case of a locked rotor, the combination of the resistance heating wire and the bimetal disc can provide an extremely precise trip time and play a maximum protective effect. The 3MP feature allows the motor protector to be installed outside the winding, providing motor manufacturers with higher manufacturing flexibility. As a thermal circuit breaker, 3MP has outstanding current sensitivity and is an advanced low-cost transformer protection solution.