Wound Rotor Motor

I hope that the administration does not slap this with a rudeness or 10+ OT rating immediately. I am very tired of a "Guest" posting poorly written questions here that violate the FAQ guidelines of this forum, particularly when I have concerns for their safety. Allow me first to quote the pertinent part of the CR4 FAQ:

• Provide as much information as possible. The most frustrating questions on this site are like this: "I need a sensor to test water flow - which is the best one." What are you testing for, what are you trying to determine? Is it in a stream, a pipe, an aquifer? Are you looking to measure velocity or mass? Are you testing for particulates, mineral concentration or pollution? Is it wastewater, potable water, slurry, etc.? The more you let us know, the better the chance that someone on the site will be able to help you find an answer (thanks Silas Marner). Now allow me to make a copy and paste quotation of the OP first sentence: if anyone is familair with these motors and would no if an over current situation could be caused by the secondary control system.

No. I do not know these motors. Nobody but this "guest" knows these motors because they were never identified to us. We have no idea where they are used, who made them, what model number they are or anything at all that might allow us to say if something might be failing, marginal or normal. The only thing provided for us that gives us a hint about what is happening comes from the second sentence where we find out that this is a 60 horsepower motor that pulls 37 amps unloaded (presumably mechanically unloaded). But under full grapple (a delicious word choice, I will try to use this myself in the future) current draw of 200+ amps. A six fold increase in current draw for many motors in starting to move under a mechanical load versus running under no mechanical load is not surprising. The third and final sentence(?) I attribute to the OP's limited grasp of English. (But where did he get the word "grapple" from then?) What is very disturbing to me is the idea that somebody that somehow measured more that 200 amperes of current came to us instead of a supervisor, TA, colleague or lab instructor for help. The OP is working with a lethal system that may or may not be working properly. Without more information from this "Guest" I am very worried for their safety and anyone around them.

200A under what conditions? How much resistance in the circuit?

It appears that you do not know much about WR motors. One really common mistake is for people to believe that if they just short out the rotors, it becomes a "standard" induction motor. This is not true but unfortunately this has not stopped it from happening. So if someone has done this to your motor, it's entirely possible that it will pull that much current in attempting to accelerate.

Here is a good site to learn more about WR motors.

LM Photonics - Slip Ring Motors