One type of starting relay used on fractional horsepower compressors is the positive temperature coefficient (PTC) relay. It performs the same function as a current relay or potential relay but in a ...

Many single-phase motors used with refrigeration-duty, semi-hermetic and hermetic compressors require an external relay to assist in starting. How much do you know about these necessary products? An ...

Semiconductors exhibit different types of temperature coefficients. In order to valuable parameters such as resistance or forward voltage drop and the associated change in temperature, one must ...