Woodward LSM Problem

Could be moon phase.

Maybe a broken framus.

I think I see a problem with the #3 genset fuel supply. From here, it is really hard to tell.

Try asking these guys: LSM - Woodward

I had a similar problem one time with 2 Cat generators.and it turned out to be a bad speed sensor on the incoming gen.

Bur in this caise their is no speed sensor to LSM . This problem is happening in ino.3 gen deal running/on load also.

"can anybody give good suggestion for solving the same"

Call a service tech and have #3 genset fixed.

Yes, it will cost money.

Don't waste time hoping that it can be fixed free of charge.

What happens if you run sets 1 & 3 or 2 & 3?

A generic solution with plc is far superior to vendor dependent solution in the long run.Any one can locate and solve.Solid example.

First ensure that the cable used for equalising line between various LSM modules is good quality shielded cable with twisted pairs.

2nd Ensure that screen of all shielded wires are earthed BUT only at one end.

3rd ensure that shielded cable is not laid in the trunking in parallel with any AC power cable.

If problem exists, use twisted pairs for 24V DC power supply to LSMs of each machine.

If nothing of above works do following:

For LSM to start sharing load, Terminals 13 and 14 are shorted via DG ACB contact. To sort out the cause of problem, instead of disconnecting equalizing lines from LSM of DG 3 open 13 and 14, if the problem of instability of DG 1 and 2 disappears, check the cable and auxiliary contact connected across 13 and 14 for possible short or poor insulation resistance between the cores of cable or across the contact. This is a marine application and most probobly any tracking across the contacts could be the reason of problem. Though the chances are remote as I have noticed that Panels are located in a bottom portion of the ship with sealed doors and ventilated room - but in case the ship was out for some long maintenace and doors were left opened for long period in the docks, possibility of salt moisture and tracking can not be ruled out.

Best or luck.

What was the outcome of the telephone call with the equipment manufacturer's Technical Helpline?

No instant gratification that way.

And, they might want to charge for their valuable time.