What size of motor requires a motor protection circuit? !

For ordinary pumps, regardless of their size, we use a circuit breaker in combination with comprehensive protection; only for separate cooling fans do we consider using a circuit breaker in combination with a thermal relay

Comprehensive protection – does it refer to a comprehensive protection circuit?

For integrated protection devices, can a high motor starting current cause it to trip?

The protection measures vary depending on the specific brand; generally, they aim to withstand currents 4 to 7 times higher than those during startup, in order to prevent accidental operation at that time

There are various types of motor protection circuits. The simplest is thermal relay protection, followed by the use of a comprehensive protector, and then the heating element built into the motor at the time of manufacture. Actually, none of these matter, because every form of protection has its shortcomings. For example, thermal relays and thermocouples cannot protect against phase loss and short-term overloads. Comprehensive protectors face a trade-off between overcurrent magnitude and time. The most important thing is to strengthen the management of employees, carry out daily inspections, and monitor the motor current – that’s what really matters; otherwise it’s all just for show. This is because it is common to encounter situations where the motor burns out while the protection device fails to function. Since the more protection devices there are, the higher the failure rate, these devices might be deliberately removed in order to avoid failures. It’s better to focus more on employee compensation management!