The H-A-S Rotary is rated with a dual horsepower classification. The first set of digits in the catalog number indicates the largest HP motor to be started while the second set indicates the maximum HP load that may be connected to the H-A-S Rotary. Minimum operating load is 25% of the largest HP mo Contact online >>
The H-A-S Rotary is rated with a dual horsepower classification. The first set of digits in the catalog number indicates the largest HP motor to be started while the second set indicates the maximum HP load that may be connected to the H-A-S Rotary. Minimum operating load is 25% of the largest HP motor rating of the converter.
The standard H-A-S Rotary will start motors requiring normal starting torque. If the starting code letter or the inertial loading of the motor is higher than normal, an auxiliary starting panel may be required in order to provide this higher starting torque. Contact the factory for details.
Upon receipt of the H-A-S Rotary, check the carton or crate for damage. Note any signs of damage on appropriate shipping forms. After opening the shipping container, look for concealed damage such as a damaged enclosure or cracked castings. If concealed damage is found, contact the freight carrier and file a claim immediately.
Check the nameplate to verify that the unit conforms to the required specifications.
Voltage and moving parts involved with electric motors can cause serious injuries; therefore, use extreme care when installing and maintaining electrical equipment of this nature. Become familiar with and follow all local electrical and safety codes as well as the National Electrical Code (NEC) and Occupational Safety & Health Administration (OSHA).
The H-A-S Rotary, as well as the system motors, must be adequately grounded per the NEC (Article 250 – grounding). Before removing any capacitors in the H-A-S Rotary unit, insure that they have been discharged.
The H-A-S Rotary may be mounted or installed at most any location where it is readily accessible for maintenance. The open dripproof design of the H-A-S Rotary is for use in a dry, clean location with access to an adequate supply of cooling air. For an outdoor installation, the standard unit should be protected with a cover that does not block air flow to the H-A-S Rotary unit. Special units may come fully weatherproof. The H-A-S Rotary should be securely mounted or bolted to a strong flat surface in order to minimize noise and vibration.
Before performing any maintenance, disconnect power and allow the H-A-S Rotary unit to come to a complete stop. Dirt accumulations can cause overheating, or a fire hazard, and must be removed. Dirt accumulations around and in vent openings should be removed by vacuuming.
For continuous normal applications, the suggested lubricat ion interval for the H-A-S Rotary is 9 months. Lubricate the H-A-S Rotary as follows:
Caution: Keep grease clean. Lubricate Rotarys at standstill. Remove and r eplace drain plugs at standstill. Do not mix petroleum grease and silicon grease in rotary bearings.
Check incoming voltage during starting. Voltage should not dip below 210 volts for the 230 volt model and not below 420 volts for the 460 volt model. If the voltage dips below these values, check wire size and transformer KVA.
Check appropriate wiring diagram for improper connections. Single Phase L1 & L2 must be connected to Rotary L1 & L2.
Check inside rotary panel for signs of defective capacitors. If a capacitor has a bulged case, it is defective and should be replaced.
If the load motor has a high starting code letter or is under a high inertia load (large flywheel type), an auxiliary start panel may be required. Consult the factory.
Check to see if rotary is securely bolted to the floor or surface.
Note: Some noise and vibration is normal, especially under no load conditions. As the rotary is loaded, it will run more quietly.
If current is excessive in the G3 generated phase, and voltage across L2 & G3 is high, disconnecting one or more capacitors will lower the generated voltage.
Note: The 1993 National Electrical Code (NEC) requires that your single phase service entrance to three phase operated loads through a phase converter be 2.5 times the full-load three phase amps of the operated equipment, excluding the phase converter. The approximate single phase amps required to operate three phase loads is twice the three phase full load amps.
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A Rotary Phase Converter is designed to create three-phase power from a single-phase power source. Unlike a Static Phase Converter (that only STARTS a three-phase motor), a Rotary Phase Converter will RUN your equipment continuously and get to its full horsepower potential.
The rotary Phase Converter system is made up of an idler generator and a control panel. Your start capacitors and run capacitors go inside this control panel, as well as any of the switches and relays.
By hooking your 3-phase motor to an idler generator and capacitors, you will get a 3-phase power source even though only 1-phase power could be coming from your utilities. Your idler needs to have at least a 20-30% higher HP rating than the motor that you are trying to run.
So, how do Rotary Phase Converters work? Single-phase power energizes a three-phase idler generator by giving it two legs’ worth of power. Start capacitor will give the idler motor a third leg to get it working and a run capacitor will balance the phases out in order to provide your motor with a clean and reliable 3-phase power.
Rotary Phase Converter is made up of a 3-phase idler generator (or motor without external shafts), and a bank of capacitors wired together to work as a single large capacitor. Here is the schematic diagram:
From the diagram, you can see that the converter is receiving power from a single-phase two-line power supply (to produce two-thirds of the phases required), and the Rotary Phase Converter creates the third line of power.
Rotary Phase Converter’s idler motor needs a boost (a third leg) in order to get going. This can be done by some kind of another mechanical device (another motor, for example) or the use of the capacitor''s provided rotating magnetic field to start the converter (also known as start capacitors).
Once running, the three-phase idler motor will run on two legs of a single-phase power supply and generate the third phase in the process. This will give our equipment 2 phases from utilities and one phase from the third leg of the motor winding.
These three lines will be connected to our three-phase machine motor and it will start and run just as it would on three phases from the utility company. Run capacitors need to be sized properly as well in order to supply perfectly balanced 3-phase power at 120 degrees.
To operate Rotary Phase Converter, you will need to start it WITHOUT any connected load and once it starts producing power, connect your largest motor first. It can also work through the distribution center to give your whole shop three-phase power.
Three-phase motors are considered to be more efficient than single-phase, this is why they are a preferred option for shop or factory owners. So, how do 3-phase motors rotate? Here is a good explanation (video):
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