Thanks Skogsgurra and Edison123,
The peckerhead is laid out for jumper connections and it will be easy to connect. Edison, for the load dependant speed regulation Skugsgurra is right. The armature and series field must maintain polarity. I see I flip flopped them in the original question. I'll...
Hi all,
I am connecting a compound DC motor and have run into series field markings that are new to me. Armature is marked A and AA, Shunt field is marked F1 and F2 and Series field is marked X and XX. I want to connect cumulative and I believe that my jumper connection should be AA to X or A to...
Have you checked brush current of each brush and verified amps per inch squared? Depending on brush grade this should fall between 40 and 100 max. Are all brushes in a rig even with regards to amps?
Drivesrock,
I'm running a system that is almost identical as the one you are describing. Have you contacted REX transformer yet?
They built our 4MVA xfrmr which is feeding our 12 pulse system. No problems.
The standard way of doing this is to obtain a grinding rig. Martindale or Ideal can supply this. You remove one of the brush rigs and make a fixture that bolts up to the brush rig support and that the grinding rig bolts to. This must be true to the shaft. Run the machine slow using the power...
They probably stopped by because of the new section they are putting in the NEC about listing all panels by the builders. There are new requirements concerning panels that are installed in your plant that were built by an OEM. I dont know yet but I would imagine that any panels that were...
Here are a couple of thoughts. First: At 60 hp this motor is most certainly reshaftable. The rotor needs to be taken out and the rotor and broken piece of shaft need to be taken to a motor repair shop for the shaft to be pressed out of the rotor, measured up and a new shaft machined and pressed...
