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Thanks everyone, for your help I will try all the suggestions. This has been a learning experience as I hoped it would be. Watch in the future I will keep you posted when I find the result.

There is a new rotating assembly, and the slip frequency is lower. I spoke to the manufacturer to see if the is an adjustment for the slip frequency, there's not. The question remains do I need to reduce the pressure in the compressors? Do you all think just adjusting the field current may be...

Electricpete you are correct about the connecting rod. Waross, please realize, I am a instrumentation and controls guy, I studied motors and wrote a final paper about them for my degree years ago. What I've seen since has been 480 3 phase with a VFD. So please don't assume that I'm using the...

Let me start with the easy question first, there is no tach, the exciter field is applied as soon as the motor contactor is energized. Exciter field current is constant at about 6.5 amps for 30 seconds, then for 5-1/2 minutes the exciter field is held constant at 13 amps while the bypass valve...

I do apologize, these are brushless motors. I know that when the motor is started the exciter field current is applied, i don't know if there is a contact providing this to the 469, I"ll have to look at the prints on Monday. I also know there is a time (30 seconds) before the 469 really...

Here's what I have, a Basler MVC236, a Basler SCP250m, and a Hyundai Ideal Digital Synchronizer System. The motor always starts and spins, but doesn't always sync, at that point I get a PF trip on my Multilin 469. I went back and read the book on the Hyundai Ideal DSS, and sure enough it works...

Waross, yes it is a new sync controller. I know it is different from the old because I had to pull wires from the CT's and PT's to connect to the controller. I thought the controllers were Power Factor based and not frequency. I don't know of anything on these controllers that controls...

Better description of this compressor. This compressor compresses on both strokes, pressure on both sides. This is a natural gas compressor (Cooper). The crankcase is not pressurized. I have recently upgraded the sync controller, because the original, was nearly prehistoric, parts were...

I have 2 4160VAC 4500hp Sync motors that power reciprocating compressors. My issue is starting the electric motors, this is very inconsistent sometimes they start and sync, and sometimes they don't sync. I am trying to make the issue with management that the reason they are inconsistent is...

Thanks for the information, I did cycle power on both the plc and the hmi, but no help. The manufacturer did finally call back and found that a DCE application was locked, they stopped and restarted it. One would think that if you reboot the computer the hmi is running on that that application...

I am working on an emissions monitoring system (Manufactured by Systems Monitoring). We had a thunder storm come through the area and is the possible blame for my problem. The NOx analyzer had to be sent out for repair, no big deal. But with the rental unit installed I tried to perform a...

Thanks for the advise, I will check the the phase rotation at the same point. The utility phase rotation is CBA, I will check what I write more closely next time. Waross, saying the obvious things are not offensive, I often need reminded of the obvious. Unfortunatly, I am the last call when the...

Motors are 3 phase induction motors, phase to neutral voltage is 284 on all 3 legs, please ask more questions so I can get this fixed. this customer is getting very upset.

I want to the job site today, the motors ar 480 3 phase. again I checked the phase rotation of the utility which was CCW, the the generator which was CW. Voltage at the generator was about 485 and the freq was 60.4. We couldn't transfer, the facility wouldn't let us. I conducted a test with an...

I will check the freq., The firld tech assures me it is correct (60HZ), if it is correct does anyone have any other ideas?

I am having a problem with a facility, that uses a generator as a back-up power source. When this facility is running on utility all is normal, when they switch to generator all the motors go to half speed. This is a 480 VAC 3 phase system. We have chacked the voltage when generator is running...

Yes, it is a Diesel. When I arrived at the site the engine was running and sharing the load (Parallel operation) I will check the governor.

If this forum will recall, several weeks ago I posted, requesting advice for some 13.2KV generators that had burned up, and associated testing and monitoring. I have been monitoring, and performing test, and have not seen anything that looks out of the ordinary. Please remember I am new to power...

If I recall, you may be able to check the main rotor at the rotating rectifiers. Disconnect the output side of the rectifiers and I think that is the input to the main rotor windings. There is also a proceedure to check the the rotating rectifier assembly, did you perform that proceedure? Do you...

Thanks, that's kind of what I thought.