Just from past experience the VR6 does not do cross current very well. If the load demands can take it I would remove the cross current lines and run it in droop. You should be able to use the internal droop pots to balance out the reactive load. If you are required to run in cross current I...
As POWERWAGON75 said check the governor linkage and make sure the governor is set properly. To check for air in the fuel you might want to have the engine manufacture install a sight glass on the fuel return line and check for excess air bubbles.
From your description it sounds like you have a tray type Cat Voltage regulator. You can try to get the service manual but it would probably a lot easier to replace it with a VR6, any Cat dealer should be able to help you out. You will have to get a Mod kit to mount the Regulator but it is a...
Generally load sharing is required to prevent the prime mover from having a reverse power condition. You also need to consider VAR sharing. If you do not take these items in consideration good luck trying to keep your breakers closed. The protective relaying will trip everytime. You might...
Under normal conditions the ATS should not trip. All breakers should be set higher than the input feeder breakers from the Utility and Emergency.
If you have a close transition and during retransfer the ATS will often shunt a breaker if it is in parallel too long.
Usually this is done by shunt...
I assume if this is commissioning. The genset is under warranty. I would have the engine manf. verify gov and voltage regulator settings. It might be as simply as clogged fuel filter. Was block loading with load banks part of comissioning? I would check voltage and freq. dips. You should...
I don't know if this helps. I think I would first determine phase rotation. I would check at the inputs of the 120V 3Ph motors. With both generators as power sources.
I think you have a battery problem, the noise you might be hearing might be from the UPS rectifers trying to charge the dead batteries. I would be consired about the 20A of ground current. Is this with the generator supplying the load or all the time? If you have a 3 pole ATS, make sure the...
I am not sure this will help but I think you should verify phasing. I do not know if you have looked at your other phases during these trips, but you might find phase C return current on phase B system current.
I am currently involved in trying to fix a UPS with an undersized generator. So I have an idea where you are coming from. The reason the generator needs to be oversized is due to the nature of the UPS. When normal power fails the UPS will block load the gen-set. Most UPS have a max. of a 1...
In order to find fuel consumption you will need to supply the KW ratings of the engines you need. You should be able to visit the Cat website, this can direct you to your local Cat dealer that should be happy to answer your questions.
I have had this problem before, usually the cause is the voltage regulator is losing power. I would check the fuses and fuse holders first. Pay attention to the PM fuses that power the regulator and also the sensing input fuses. If you do not find any loose connections or bad fuses. I would...
I have two 1800 kVA emergency standby generators that can parallel the utility. When either engine, alone or in parallel, is in parallel with the utility, I have excessive amounts of third harmonic neutral current. This will cause the utility and generator breakers to trip on ground faults. I...
