Previous in Forum: Power Droop vs. Speed Droop   Next in Forum: Trick for Fast Segment Cleaning of Commutator
Close
Close
Close
10 comments
Rate Comments: Nested
Participant

Join Date: Dec 2006
Posts: 3

Motor Wiring

06/18/2012 6:22 PM

Hi Everyone

I have mitshubishi exhaust fan Sirocco. There are four wires for connection one for ground and other for power supply.But on the motor specs it is written 200V , 1 phase and 50/60 Hz. How will I connect 3 power wires for single phase 200V AC. Please help me to resolve this matter.

Thanks

Naveen Sharma

Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Motor Wiring

06/18/2012 6:34 PM

Something isn't right here. Where is the manual/wiring diagram/schematic/ model/part/serial number?

Register to Reply Score 1 for Good Answer
Guru
United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#2

Re: Motor Wiring

06/18/2012 7:42 PM

Pay for someone that knows what they are doing. You don't!

__________________
The reports of my death are greatly exaggerated.
Register to Reply
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#3

Re: Motor Wiring

06/18/2012 11:51 PM

It could, just maybe, be a two-speed two-winding motor, with ground, common, winding1 and winding 2 connections.

(Or something else.)

Some ohmmeter checks might be informative.

__________________
In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
Active Contributor

Join Date: Feb 2008
Posts: 22
#4

Re: Motor Wiring

06/19/2012 10:35 PM

perhaps the other two are for a start/run cap!!

check connection info supplied with motor.

Register to Reply Score 1 for Good Answer
Power-User

Join Date: Jan 2010
Location: Atchison Village
Posts: 383
Good Answers: 39
#5

Re: Motor Wiring

06/20/2012 12:03 AM

We need as much information from the motor plate as possible, as well as wire colors and any tags on the wires. Guessing might harm the fan, use excess current, or overspeed the motor.

__________________
Align culture with nature...
Register to Reply
Guru

Join Date: Jun 2011
Location: Phnom Penh
Posts: 4019
Good Answers: 102
#6

Re: Motor Wiring

06/20/2012 1:56 AM

How do you know that one of those wires is earth/ground?

If you can, supply a photo or two of the whole motor and the wires (terminals).

If you have a multimeter, measure the resistances between each wire and all the others. Also measure the resistance from each wire to the motor frame.

__________________
Difficulty is not an obstacle it is merely an attribute.
Register to Reply
Power-User

Join Date: Jun 2010
Posts: 344
Good Answers: 17
#7

Re: Motor Wiring

06/20/2012 3:13 AM

Japan uses same wiring system as USA, ie 2 phase 3 wire, one neutral and two 100V live wires 180 degrees out of phase (+/- 100V say) for a total 200V. Fourth wire is earth as in MEN (Mutiple-Earthed Neutral) system.

Jap and US are both 60Hz, so no need to worry there.

If you want to connect this fan to the US system, either

you will need a transformer with centre-tapped secondary winding to provide a total 200V (100 + 100), or

you will have to use both 115V phases and put a resistor in series with each phase to drop the volts under load to the correct value.

Register to Reply Score 1 for Off Topic
Guru

Join Date: Jun 2011
Location: Phnom Penh
Posts: 4019
Good Answers: 102
#8
In reply to #7

Re: Motor Wiring

06/20/2012 4:15 AM

OP said the motor badge was marked 1 phas..

No point guessing until OP comes back with more information.

__________________
Difficulty is not an obstacle it is merely an attribute.
Register to Reply
Commentator

Join Date: Jun 2010
Posts: 75
#9

Re: Motor Wiring

06/20/2012 5:12 AM

What does motor nameplate say? Specs. may have typographical error.

Register to Reply
Power-User

Join Date: May 2011
Posts: 102
Good Answers: 2
#10

Re: Motor Wiring

06/21/2012 5:08 PM

Measure the resistance between each terminal. You'll find something like 80 to 100ohms and 120 to 150 ohms, and a total of 200 to 250ohms. The bigger the motor the smaller resistance you can expect.

There are two windings with a common connection. Connect the common to neutral, connect the low resistance to Live, and connect the other in series with a 2 to 4MFD capacitor rated for 350vac or above.

It's a capacitor run motor, the main winding has less resistance than the phase displacement winding so needs a capacitor in series, not too critical in my experience. Megger to earth to test the windings and check the earth is solidly connected to the frame. Keep an eye on the temperature for the first 24 hours if you are connecting to 220vac & 50 Hz. Should be OK we had some that were stalled with dust & grease for months and nothing happened.

Register to Reply Score 1 for Good Answer
Register to Reply 10 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

BB Raina (1); cryogen (1); engineertony (1); lyn (1); ormondotvos (1); Phaddy (1); TonyS (1); Tornado (1); Wal (2)

Previous in Forum: Power Droop vs. Speed Droop   Next in Forum: Trick for Fast Segment Cleaning of Commutator

Advertisement