It started right up, and spun very quietly and smoothly. I'm now confident the motor works great, but is reverse rotation. I only used green on the diagram below to make it easier to see. All items in the system have a separate ground, but I didn't put that in the diagram. Also, this was a box that I bought from ebay, and it's how it came wired. I hooked power to it, as instructed, but obviously something isn't correct.
Here are the issues that I see. Will this be a problem with generating three phase power? Should this be corrected? When hooked up per instructions, the idler motor just buzzes and dances. I mentioned above that the run caps are Dual run caps. I have never seen these used in other RPCs, so I don't know if this is causing the issue with how it's wired. Trying to upload a larger picture. I've traced the lines, and just can't figure out what to try next. I'm sure it must be a simple wiring error Dual run caps are not a problem.
I've gone through the wiring diagram of the RPC box and it seems to be correct. It must be how the Idler Motor is hooked up. It keeps jumping back and forth when I put power to it. I will try a different connection. I don't see the resistor across your start caps. I built one and the fact I put it in makes me think it was needed, because I would generally cut out stuff that wasn't essential to the function.
I don't recall seeing resistors across the start caps either. I will have to check. Is this possibly what would cause it to not run? Rotary Phase Converters Rotary type phase converters are usually recommended for the operation of a group of motors, or motors with considerable load variations.
Request a Quote or browse our products This site uses cookie to ensure you get the best experience on our website. Learn More Accept. Generac Light Towers. Pressure Washers. Generac Pressure Washers. Phase Converters. Solar Power. Generac Clean Energy. EV Charging Stations. However, it should be noted that low voltage will result in lower motor starting torque and higher amperage for a given motor load.
Most applications, therefore, require at least V V at full load when operated from a V V source. Consult Ronk if lower voltages will be present. Higher line voltage, above V V can adversely affect the converter or load. Contact your power supplier if your single-phase voltage exceeds these limits, to see what can be done to lower it.
The phase currents and amperages should be checked under various loading conditions. Where required by particular load characteristics, the capacitance and tap connections should be adjusted according to installation instructions. The rotary transformer is started by a single-phase power source and the capacitance of the connected panel. The converter must be started and reach full speed before any load is applied to it.
The two single-phase input lines are connected directly to two of the three-phase output lines. The third line is manufactured by the combination of the rotary transformer and capacitors creating a three-phase output with the proper phase angles. This is usually impractical, since the converter will consume power while no work is being performed. Where required by the application, however, the converter can be operated continuously at no load. If considerable idle time is expected, the factory should be consulted.
Losses in the converter will be lower when the load is applied, typically about one-third the idle values. When the converter is properly balanced, no appreciable change of motor efficiency occurs. Motor starting torque is dependent on many factors, but will generally always be less than when started on a three-phase line.
The factory should be consulted with the details of any application requiring high inertia load or a high starting torque. Standard auxiliary starting panels are limited to 20 starts per hour of each motor.
The factory should be consulted if more starts per hour are required, and a start panel is needed. Motor breakdown torque, like starting torque, is dependent on several factors. The breakdown torque generally depends on the size of the motor relative to converter size and number of other motors running. Breakdown torque is typically around twice full load torque, but may be improved by using a Type D or D-1 converter, or by running other lightly loaded motors simultaneously.
A properly applied rotary converter is designed to provide acceptable three-phase power to the equipment. Some electronic loads may require isolation transformers to provide improved voltage to the load. If any operational problems arise, the troubleshooting guide in the service manual should be consulted.
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