Question about Hitachi EC12 Portable Electric 2hp Air Compressor, Oil Lubricated
Most direct-drive electric compressors can run on a standard 110-volt circuit. When you get into the electric wheelbarrow compressors, you may have a choice for a dual-voltage option, which allows you to switch between 110-volt and 220-volt, depending on power supply that is available for the job. However, for jobs that require substantially more air, usually a 220-volt motor will be your only choice if a gas-powered compressor is not allowed as an option. When looking for a stationary shop compressor, you need to know what power supply you have at your disposal (208v, 230v, or 460v), and whether it is a single-phase or three-phase power. These units are usually hard-wired into the power supply and require a magnetic starter for thermal overload protection
Posted on Aug 27, 2008
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Posted on Jan 02, 2017
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A centrifugal switch to allow the motor to start up on the start winding and once started it opens to take it out of the start winding. The motor has to have voltage applied to the start winding and the run winding at the same time in order for the motor to start. The capacitor is part of the start circuit. When the motor goes to start, the voltage must be applied to the start winding in order for the motor to start or it will just hum. The moment the motor reaches a certain RPM the centrifugal switch opens up to remove the start voltage to the motor and it will remain running on the run winding. The motor will not start up on run voltage alone. It needs both, the start voltage and run voltage.
I think the problem is that the motor is not getting the start voltage supplied to the motor or the start winding has opened up in the motor.
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