Generator

One could look at the outgoing circuit protection device(s) and make a judgement from there.

agreed, this is THE solution.

No way to identify the manufacturer?

Are there any names or numbers anywhere on it?

Send some photographs, and maybe someone here can help.

kW is figured by the horsepower rating of the engine times .746. For example if you have a 500 horsepower engine it has a kW rating of 373. The kilovolt-amperes (kVa) are the generator end capacity. Generator sets are usually shown with both ratings. To determine the kW and kVa ratio the formula below is used.

.8 (pf) x 625 (kVa) = 500 kW

http://www.dieselserviceandsupply.com/generator_faq.aspx

But in lieu of more information than what's given, we can answer the OP with: You don't!

Correct, but don't forget to leave some compensations for the power loss between the engine and the generator. 746 is theoretical and losses have to be considered. Another way, although not scientific, is find the horsepower of the motor and look up a similar sized unit in a catalog or on the internet. This should give you an approximate output of the generator. If there are more than one that matches, take the average or the worst case depending how cautious you want to be.

Good Luck, Old Salt

This is the relationship btn hp and w 1hp=745.7w=0.7457kw Thx

If all else fails look on the internet at generator suppliers and find one they offer that is similar sized to your (generator capacity is roughly proportional to size in most cases irrespective of brand).

This will give you an idea, but connecting up your generator with a variable load and monitoring the output voltage is about the only thing you can do to be sure if no information is available.

Measure the dimensions and compare with a generator maker's catalog. Following is a place to begin on the web. https://www.cumminsgeneratortechnologies.com/en/products/stamford/

The most probable speed is 1500 rev/min. A small, single cylinder engine might be 3000 rev/min.

It is not clear if you have just a generator or engine-generator set.

Give us a clue, Maharajah.

I'm thinking,,,,,,,,,,,,,,,,,,,,,,,,,

No, sorry, can't see the answer

Load the genset until the governor is wide open. Measure the current at that stage and - voila!

Depending on the size of the generator, to load it, you could run a motor against a variable load or if it is a big system, then an electrical engineer will tell you how to load it simply and safely