Leroy Somer Generator How To Solve Our Problem Now - On The Alternator Voltage?

How to solve our problem now - on the alternator voltage? - leroy somer generator

Just Wärtsilä Cummings and Leroy Somer alternator will be discussed - the production workshop and after the repair, re-install the factory. The remedy is for the sole engine parts - alternator parts service only.



The generator is Leroy Somer LSA 54M75, 2450 KVA, 415 V, 50 Hz, 4-pin. April Leroy Somer R 449 and R 726 (see attached chart). After installation, we could not the voltage (50 V, obtained instead of 415). Representatives of the web connections has been shown, and even evidence of AVR - OK.

At that time, was the representative of the contractor. try to use an external battery - it is an external battery unit for 2 seconds at rated excitation connected and managed to 415 VAC, as required. But back at the launch of the R 449-connection to the excitation unit - we could not reach the level of voltage of 415 V, but they manage to get only 50 V.



R 449-compound has an auxiliary winding voltage which the voltage of the auxiliary winding at rated speed and move 88V measures.



Another guy came yesterday and brought the external battery 12V 200Ah and connected to the body excitation (R cable from 449 connected to the excitation unit and the battery). Disconnect the other cables. After the execution for 2 minutes at rated speed, the son of the auxiliary winding was burned to the R-449 and left in the test. However, during the test voltage was about 488 V in the terminal.



The differential relay was triggered at this time if the generator is running, without any connection to the counter.





The hope of gaining its support.



Thanks