标题: Understanding Overload Relay and Its Importance in Electrical Protection

Overload relays play a vital role in safeguarding electrical equipment, particularly motors, from damage caused by overcurrent conditions. These relays are designed to monitor the operating current of electric motors and ensure that they do not exceed safe levels, thus preventing overheating, mechanical failures, or even complete equipment destruction. The principle behind an overload relay is quite simple: when the motor draws an excessive amount of current, the relay detects this anomaly and triggers the protection mechanism, which either interrupts the circuit or signals the need for maintenance.