COMMUNITY FORUM

ChesterBrown

03:03PM | 01/02/05
Member Since: 01/01/05
2 lifetime posts
Bvelectrical
I have a used air compressor. It has a brand new single-phase leeson motor on it. I cannot get the new starter box (siemens magnetic single phase) wired properly. After getting a second opinion from someone who knows much more than I do on the subject of electricity, we still cannot determine why I am getting power to the box but not from the box to the motor. We wired it direct with a jumper to ensure that it was not the motor, but still cannot get power to it from the box. Can anybody help? An additional wiring diagram maybe?

Wireman

08:38PM | 01/02/05
Member Since: 12/19/04
62 lifetime posts
The single phase line coming into the starter box should go to L1 and L2 on the starter. The two lines going to the motor should be connected to T1 and T2. There should be a line coming from L2 to the bottom of the starter and connected to the overload relay, through the relay to one side of the coil. Another line is connected to L1 and goes to the pressure switch, through the pressure switch and to the other side of the coil.

With the pressure low check to see if you have 120 volts (or 220 colts if the compressor operates at 220 volts) at the coil terminals. If you do it means the coil is bad. If not, you may have a bad overload relay or a bad pressure switch. Make sure the reset is pushed in completely. Hope this helps. If not, email me at papastarr@yahoo.com with more information.

Ron
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