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I have a 20kv magnum generator, 3 phase, with selections between 120, 240 and 480 volt, on 240 and 480 I get 76 volts, on 120 I get 38 volts, the voltage adjuster is operating fine.

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With those voltages how can the voltage adjuster be working fine?

Posted on May 08, 2017

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I have a generator designed 440V but the problem is I can use only 220V and the 440V cannot


440 volts is normally 3 phase so unless you have a suitable 3 phase plug it will only be 220 volts
read your user manual carefully

Jul 19, 2016 | Electrical Supplies

1 Answer

I have a mecc alte Mr 1 generator I'm producing 240 volts but I can't find a neutral so I can use 120 volts.where does the neutral come from


as 240 volts is single phase , it will not be possible to reduce the power by cutting across a neutral wire ( 240 volt power out and 240 volt neutral return That is ac power ) to do what you want to do you will need a 3 phase generator so that you can jump across a phase to get lower power

May 04, 2016 | Electrical Supplies

1 Answer

Where can i obtain a wiring diagram


A one phase 3 wire system has a center tap. Two hots and a neutral. Typical 120/240 volts.
A three phase 4 wire system has Three hots in a Y or Delta. The Y system has three hots and the neutral comes from the center of the Y, this is the neutral and grounded conductor, 120 volts from hot to ground and 208 volts hot to hot. In a 3 phase system the voltage is not doubled hot to hot as in a single phase system because the hots are 120 degrees phased from each other and the square root of 3 is the factor, multiply the 120 volts by 1.73 to get 208 volts hot to hot. Multiply 208 by the reciprocal of 1.73 and get 120 volts. Your exact application is not given so it is not known. A delta system is a triangle and the angle of each triangle is a hot wire, one angle would be grounded or the center tap of one of the sides of the triangle. Y is the configuration of the windings of the alternator or transformer and Delta is the configuration as a triangle of the windings of the alternator or transformer where the power supply is.

With a three phase home service, you can only connect two hots from your single phase generator, and the neutral. One of the house's hot does not get connected and any three phase loads in the house should be switched off and kept from energyzing or a circuit breaker or fuse serving that 3 phase load may trip.
Only one power supply can be connected at a time. The power company power must not be connected at all while using an alternate power supply unless your power supply has means to synchronize the alternating cycle.

It is adviced that the loads be kept within 10% of their rated voltage, especially motors.

May 04, 2015 | Heating & Cooling

1 Answer

I purchased a generac 22 kw 3 phase 120/240 volt generator. I was surprised to find that it had a wild leg. Can i change the leads on the stator output to eliminate the high leg and get straight 120/208...


This unit is wired 120-240V 3 phase Delta. if you are using on it 120/208V 3 phase application it will need to be re-tapped. If you are using it in a home 120-240V single phase it will need re-tapping, Do NOT just use 2 legs, as this will cause rotor imbalance and wear out the rotor bearings, and odd ball currents to flow. If there are 12 leads coming off the stator it can be reconnected. If not you are stuck with it, except by using a transformer

Dec 15, 2013 | Generac Generator QT02224JNAX QuietSource...

1 Answer

Want to add 240volt outlet to generator


You CANNOT do this, USA 240V is derived from a poly phase scenario, IE 120V line to neautral and 240V line to line, UK 240V is derived from 1 line to neutral it will not work unless you power a transformer

May 16, 2012 | Coleman Powermate Powermate 5000W...

1 Answer

Cooling fan


check voltage going to the fan motor - no volts check power relay or source. also check for volts on the motor name plate and polarity if it has any.
no volts means something is not feeding. volts present could mean bad motor.

Feb 28, 2012 | Miller Electric Mfg Co 903394 Deltaweld...

1 Answer

I have a WESTINGHOUSE WELDER type rs 250 that is wired for 440 volt and need to change to 220 volt.


HI:) If that is a 3 phase 440 volt and you want it to use 220 volt 1 Phase you will have to get a phase inverter to change it from a 3 phase to a single phase.

Dec 19, 2010 | Welding Tools

1 Answer

67 votage display on generator output.


Please stop making new problem threads each time you answer, instead post a comment to one of the 5 threads you already have open for this problem. It's getting hard to follow the conversation :-)

OK, now to the problem. You say you have checked 67 volts is displayed on the generator output, I think this means that you see 67 volts on the control panel display when the generator is running. This can be several different problems:
a) a bad CT/PT module that tells the controller the wrong voltage
b) a bad A/D module inside the controller itself
c) a bad voltage regulator

Get a real DMM meter and measure the voltages at the top side of the output (large) circuit breaker of the generator. Put the black lead of the meter on the neutral wire and then measure to each of the phase wires on the circuit breaker. If you get normal voltages then you probably have a bad A/D, if you get 67 volts on all 3 phases you have some other problem.

You still haven't told me what model/spec of generator this is, look on the data sticker on the generator cabinet.

Peace,
Carl

Dec 14, 2008 | Coleman Powermate Powermate 5000W...

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