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Or the bus connections of course... Rafiq Bulsara http://www.srengineersct.com

Single phase sync check relay is a common practice (to save cost too) but with a caveat. Those systems are supposed to be correctly commissioned for phase rotation. Once correctly commissioned, most generators are not expected to reverse their direction unless you change the prime mover or the...

What IRStuff said. This is no different than peer review. Rafiq Bulsara http://www.srengineersct.com

This is a common interconnect requirement for synchronous generators. (by most utility co. in the USA). I interpret the utility's statement as them requiring reverse power relay. When the gen is capable of producing more power than the load on the feeder, it will back feed the utility, which is...

There you go...! Rafiq Bulsara http://www.srengineersct.com

Even your engineer appears to have made a mistake in calcs. Rafiq Bulsara http://www.srengineersct.com

P=V*I*1.73 is for a "balanced" 3 phase power system, that is when I is equal in all three lines and V= V line to line. For unbalanced system, calculate per phase values and add them up. For each phase power, the formula is V*I where V is line to neutral or (Vll/1.732). Rafiq Bulsara...

Yes, determining the safe fault current for a fuse is one of many important factors. Load current itself does not determine if the setup would be safe. Start here to see just the list of considerations, never mind the how to manufacture and test those...

TheSwener: Fuse manufacturing is not a DIY item. You came here for an advice and you got it from some very knowledgeable and among the wisest members on this forum. Heed their advice. If you knew anything about the hazard involved in what you are asking, you would not have asked the question...

No. In your scenario you will be partly off loading the generator to utility, upon its return. I am not sure why you think what you think. Rafiq Bulsara http://www.srengineersct.com

Note that soft loading/unloading is always between two different sources, such as generators and utility or another gen power bus. Load is supposed to be up and running on one of the sources, before it gets transferred to the other. Rafiq Bulsara http://www.srengineersct.com

No. Unless your definition of soft loading is different than what is commonly understood. It may help if you state why do you think it could be a contradiction or a problem. Generators only see the loads on their terminals. Rafiq Bulsara http://www.srengineersct.com

What you describe ( if I understand it correctly) is a common setup. Transformer secondary parallleing is not a requirement for soft loading/unloading of the gen on the primary common bus. Rafiq Bulsara http://www.srengineersct.com

electrouw: Thank you for the feedback! Rafiq Bulsara http://www.srengineersct.com

Also refer to NEC 110.14 (C)(1). One can argue, and even win at times, but I would use 60 dec C column ampacity for sizing conductors for 100A or less or sizes #1 AWG and smaller. Rafiq Bulsara http://www.srengineersct.com

So if your load is only capacitive (connected to the generator), no active power is supplied by the prime mover, except for the losses. Rafiq Bulsara http://www.srengineersct.com

I am sorry, I misread a bit. The asycn motor (the prime mover) does not supply reactive power, ever. Only active power. The power factor of a synchronous generator in stand alone mode is solely dependent on nature of the load. Rafiq Bulsara http://www.srengineersct.com

What is a capacitive test for an induction machine? Rafiq Bulsara http://www.srengineersct.com

Asynchronous generator (induction machine) does not "supply" any reactive power, it in fact "absorbs" reactive power (hence inductive) from the utility (or other large source) to which it is connected to. Your last two paragraphs do not make much sense, but I gather you are asking if this...

The supplier of the measuring instrument is right. Rafiq Bulsara http://www.srengineersct.com