2x Universal 1/5HP 150W Washer Fridge Cooler Compressor Motor Thermal Overload Protector
How to Check If the compressor overheat protector Works Well?
Check It With Multifunction Meter，IF The Resistance is Below 1 Ω，It's OK; If it is ∞, It is Damaged.
1.Refrigerator Overload Protector attaches to the compressor and shuts off the compressor if the compressor motor draws too much current.
2.Low profile and light weight, highly reliable performance. Idea for compressor of air-condition or other electric protection appliance.
3.Safely store any food that could deteriorate while the power is off and unplug the refrigerator before installing this part. Wear work gloves to protect your hands.
Specifications:
For: 1/2 HP, 1/3 HP, 1/4 HP, 1/5 HP,1/6 HP Refrigerator Compatible --One Phase
（However Due To It's Features,it's Universal，also can Loosely Works on 1/2 or 1/4 HP... Device）
--Made Of Double temperature metal
Power: 1/2 HP, 1/3 HP, 1/4 HP, 1/5 HP,1/6 HP,1/8 HP,3/8 HP
Total Size: 2.6 x 2.8 cm / 1" x 1.1''(D*H)
Package Included:
2 x Refrigerator Thermal Overload Protector
----( Random Type Will Be Sent Out )
We Have the 1/2 HP, 1/3 HP, 1/4 HP, 1/5 HP,1/6 HP,1/8 HP,3/8 HP Overload Protectors For Choosing！
What Is 'Thermal Protection' on an Electric Motor?
When you see the term "thermal protection" or "thermally protected" used in the description of an electric motor, it refers to a device found within the motor or motor compressor that is designed to prevent dangerous overheating that can cause motor failure.
The Purpose of a Thermal Protector
This overheating generally occurs when the motor is overloaded, when a bearing seizes up, when something locks the motor shaft and prevents it from turning, or when the motor simply fails to start properly. A failure to start may be caused by faulty start windings in the motor.
The thermal protector consists of one or more heat-sensing elements built into the motor or motor-compressor, plus an external control device. The thermal protection is present to turn the motor off when excessive heat is generated within the motor circuitry, halting the temperature climb before it can burn up the motor.
These thermal protectors reset themselves once the motor cools down to a safe operating temperature. There is usually a visible red button located on the wiring side of the motor— usually, though not always, located opposite of the motor shaft. On motors equipped this way, you must press the reset button to reset and restart the motor. On other motors without a reset button, the reset happens automatically as the motor cools.
Having a motor shut down because it tripped a thermal limit is inconvenient, but it certainly is better than having to replace a motor because it overheats. And the shut-down can alert you to problems with the motor or connected devices, or to the load attached to the motor. When a motor fails to start or overheats during operation, it may indicate that the motor has reached the end of its useful life and must be replaced. But often the fault does not lie with the motor at all. There could be an obstruction on the load attached to the motor, leading to excessive load that causes heat to build up in the motor—tripping the thermal protector that saves the motor.
Examples of Motors With Thermal Protectors
A sump pump is a motor for which this scenario often occurs. If a sump pump pumps water filled with debris, pieces of debris may get caught in the impeller and lock the rotation of the pump motor, causing it to overheat very quickly. On a pump equipped with thermal protection, the device will trip and shut down the circuit to the motor windings. This will allow the motor to cool down and may well save it from complete failure. Alerted to the problem because the motor shuts down, you may be able to clear the impeller and keep your sump pump motor operating for quite some before it needs replacing.
The same scenario may be true on other electric motors that process variable loads, such as garbage disposers, washing machines or vacuum cleaners. Without thermal protection, such motors can be more prone to burn-out.
"Thermal protection" is generally a good feature to look for when buying equipment with electrical motors. By protecting the motor from overheating, it can greatly extend the life of the motor.
Refrigerator compressor overheating Protector action and downtime of its fault causes and treatment methods:
(1) Too much refrigerant, too little, will cause the compressor overload heat, vacuum from the new addition of refrigerant, complement the refrigerant can be done.
(2) The capillary or cloth filter blockage, resulting in too high suction temperature; Check capillary or dry filter, replace a capillary or dry filter of the same specification.
(3) Condenser inlet and outlet blockage, resulting in excessive condensation pressure, compressor overload and downtime: should remove obstacles at the inlet and outlet.
(4) Condenser ash is too thick, condensation pressure is too high: cleaning condenser on the ash accumulation.
(5) Compressor overload protector failure: Test the current of the compressor. The cause of the over-current is detected, and the overload protector can also be replaced directly.
(6) Compressor motor coil short circuit, heat: replace the motor coil.
(7) The compressor power supply voltage is unstable. Causing the operating current to be too large, so that the overheating Protector action: configurable regulator.
