A run capacitor is an electrical capacitor that energizes the auxiliary coil of an alternating current electronic motor, creating a rotating magnetic field while the motor runs. Run capacitors are sometimes used in single phase AC motors, and they typically have a voltage range of 370V to 440V.Continue Reading
Unlike start capacitors, run capacitors are designed to keep the auxiliary coil powered during the motor startup phase as well as during normal operation. As a result of this, the capacitance of a run capacitor is typically set lower than that of the start capacitor. Replacing a run capacitor should be done with care. Choosing the wrong capacitance value may lead to an unsteady magnetic field, which in turn may lead to increased energy consumption, drop in performance and additional noise. Installing the wrong run capacitor may also cause the motor to overheat.
Run capacitors are sometimes used in washing machines, air conditioners, dishwashers and tumble dryers. When testing a capacitor, most technicians rely on digital or analog multimeters. The unit's capacitance can be measured by placing the probes across both its terminals. In addition to a loss in performance, faulty capacitors may reveal themselves with physical signs such as leaky oil or a bulgy side.Learn more about Car Parts & Maintenance
Some common causes of a Kenmore dryer not spinning include a broken drum belt and problems with the dryer's motor or with the capacitor. Broken drum belts are the most common cause of a drum failing to spin, but mechanical problems with the motor and capacitor can cause the drum to remain in place.Full Answer >
Wiring a capacitor to start a motor begins with the connection of the positive terminal of the motor to the resistor. Take one terminal of the resistor, and connect it to the capacitor. Read the wiring diagram on your appliance to understand the colors that the manufacturer designed for the three connections, namely, start, run and common. Locate the negative terminal of the capacitor, and attach it to a switch.Full Answer >
Basic capacitor wiring instructions include guiding users through capacitor installation into an air conditioning compressor motor by removing the power supply cord, removing the old relay, pushing the single pin terminal wire onto the compressor's start terminal, pushing the wire with the other pin terminal onto the compressor's run terminal, and connecting the old relay line to the run wire's spade terminal. Some relay and hard start capacitors have instructions to inform users that no wiring changes are necessary.Full Answer >
To wire a motor starting capacitor, connect the motor's positive terminal to the resistor and connect one of the resistor's terminals to the capacitor. Identify the manufacturer-defined start, run and common connections from the appliance's wiring diagram, find the capacitor's negative terminal, and connect it to a switch.Full Answer >