What Are the Differences Between the Two Types of Thermal

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The Answer is The solder pot-type overload relay works by placing a brass shaft inside a brass tube. A serrated wheel is attached to the brass shaft. Solder is used to bond the brass shaft to the brass tube. A lever arm between the contacts and serrated wheel holds the contacts in place. If the motor current becomes excessive, the heater will melt the solder and permit the serrated wheel to turn, causing the normally closed auxiliary contacts to open. The bimetal strip-type overload uses a bimetal strip to open the normally closed auxiliary contacts if the motor current becomes excessive. There are other differences between the solder pot-type and bimetal strip-type overload relay.
Bimetal strip-type overload relays generally permit the trip current to be adjusted to between 85% and 115% of the heater rating. Another difference is that bimetal strip-type overloads can generally be set to permit the contacts to reset automatically or manually after the bimetal strip has cooled sufficiently. Generally, the relay is adjusted for manual reset. Automatic reset should be used only if the sudden starting of a motor will not cause danger to personnel or damage equipment.

What Are the Differences Between the Two Types of Thermal

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What Are the Differences Between the Two Types of Thermal

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