Product Description

In the world of industrial machinery, motor protection is essential to ensure operating efficiency and longevity. One of the most critical components for protecting motors is the 3P Motor Overload Protection Relay. This device is the first line of defense against the harmful effects of overload conditions, which can cause severe damage or complete failure of the motor.

In addition to overload protection, the 3P Motor Overload Protection Relay also plays a vital role in preventing overheating. Motor overload not only increases current, but also generates excessive heat, which can lead to catastrophic failure. The relay continuously monitors the motor current and evaluates its operating status. If it detects a condition that could cause overheating, it promptly disconnects the power supply. This proactive approach not only protects the motor, but also improves the overall safety of the operating environment.

Another important feature of the 3P motor overload protection relay is its delayed protection function. During the startup phase or brief periods of high demand, the motor may be temporarily overloaded, but this does not necessarily indicate a fault. The relay is designed with a delay mechanism to prevent nuisance tripping, allowing the motor to operate normally under transient conditions. This feature is particularly useful in industrial environments where motors are frequently started and stopped, as it reduces the possibility of unnecessary power interruptions and improves operational reliability.

Many 3P motor overload protection relays are equipped with fault indication capabilities. These relays often include indicator lights or alarm features that activate when an overload condition occurs. Such alarms prompt operators to conduct timely inspections and maintenance, ensuring that any potential issues are resolved before they escalate into more serious problems. This additional layer of monitoring not only improves the safety of the equipment, but also fosters a culture of proactive maintenance within the facility.

The 3P motor overload protection relay is an integral component of any motor protection system. It is able to provide overload protection, prevent overheating, provide delayed protection and indicate faults, greatly improving the safety and reliability of motor-driven equipment. By effectively extending the life of the motor and ensuring its safe operation, the 3P motor overload protection relay helps to improve the overall efficiency and productivity of industrial operations.

The STH-N50 Thermal Relay Is Suitable For S-C50/95 AC Contactor

Frame(A)	STH-N60
Suitabie AC contactor	S-C50/95
Aux contact structure	Manual or Auto retum
Adjust range selcet(A)	Select(A)		Adjust range(A)
	15A		12~18
	19A		16~22
	22A		18~26
	29A		24~34
	35A		30~40
	42A		34~50
	54A		43~65
	67A		54~80
	82A		65~93
	95A		85~105
Aux contact structure	1a1b(1NO+1NC)
Outline and installation dimension
	Type	L	W	H	ΦD
	TH-N60	89	57	83.5	4.5