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I have a 3phase electric motor 440 v amps.7.6 and drive thats 440

I have a 3phase motor 440 v amps.7.6 and drive thats 440 v and pulls 7.6 amps what size of breaker and fuses should i have for protection. the drive slows down the motor and or speeds up he motor for purging purposes

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Allowing for start up current I would put a 16amp 3 phase breaker/trip in circuit. If this trips then use a 20amp.

Posted on Aug 01, 2010

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Plugged it in and it won't run but it was running fine when I put it away two weeks ago.


Check the plug for loose wire or at blower where wire it enters to make sure the wire was not pulled and disconnected inside. If after looking and it is not a wire, check the brushes on the motor. They could be worn out or not making a good contact. Blow out brush housing and re-install brush sometimes this works. That's about all I can think of unless there is a safety switch then check that. Good luck.

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You cannot wire a three phase motor for single phase and you cannot wire a single phase motor for three phase. If you have a three phase dual voltage motor your options are 220 or 440 volts. If you have a single phase dual voltage motor your options are 120 or 240 volts. A 208 volt Hobart motor will only function correctly on 208 volts and is not dual voltage.

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If i am in the process of buying a generator to run 2 carrier RV rooftop ac units how big should the generator be?


You need to find out the maxamps of the rooftops which is located on each unit, then you will need to find out if these are 1phase, 2phase or 3phase units.
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How do I wire a 30amp 3phase 250 volt receptacle for proper phase rotation ie x,y,z on the device with phases a,b,c in the panel?


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Taylor 1999, series 754, 3phase ice cream dispenser freeze up


I have had this with other Taylor machines. The rear drive bearing has a pin driven into the coupling that turns the beater bar. This pin will shear off. The pulley will turn and give the illution that the beater bar is turning but it really isn't. With the unit unplugged, try holding the beater bar still and try turning the large drive pulley.
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How to get a siemens micromaster 440 up and running


Hello Stephen The first thing you have to do is make sure that the motor is connected for 220 volt three phase How do you know? your motor must have this connection info on the name plate It must show 220v Delta connection and 380 or 400 v star connection. connect your motor in Delta ie the motor connection links are connected from U 1 to V2, U1 to W2 and V1 to U2. Ok Now for the restof it You have asmall book that came with the inverter so go to page 9 and you will see the drawing for mm440 at the bottom you will see the connection for the speed pot. which is 1,2,3,4, wire in as shown make sure the wiping connection is in 3..now wire in a switch across 9 which is the common and 5 this starts and runs the inverter when you open the switch the inverter will ramp down and stop.... IF YOU look at page 8 it shows how delta and star is connected at the motor..... now go to page12 for this you must have the power on to the inverter.. as you enter the parameters they come up in sequence as you enter the info...on par 700 put in 2 also at 1000 put in 2 set p1080 at 0.0...p 1082 at 50 P3900 at1 This should get you up and going
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Dryer voltage problem


The dryer should work ok on 208 volts. The drying time may be a bit longer than usual since at 208 volts, you will only have 5408 watts of heat. Your bigger problem is your three phase panel. You can hook up one "hot wire" from the dryer to any of the three 3phase wires, and the other "hot wire" from the dryer to either of the two remaining 3phase connections and you will have a good connection to your dryer. However, the third wire from the dryer is a "ground wire" which has no connection in the three phase panel, or at least you didn't say it has one. If you can pull a ground wire from the grounding lug of the service panel feeding your 3phase box, and connect it to the third wire on the dryer, you would have a safe connection.

At 208v, the dryer will pull 26 amps. Be careful and make the right connections.

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