HT Motor Repairs

No. What has probably happened is that there has been either a phase to phase fault or a phase to ground fault within the motor. You are very unlikely to be able to disconnect the effected phase and run the motor on two phases (due to the fault likely being permanent AND inside the motor within the coils of the windings).

There is no shortcut - remove the damaged motor and get it serviced, in the mean time look for a replacement and hire or purchase it to get your plant up and running. If you are REALLY desperate, have a look at the rest of your plant and see if you have a similar motor that you can "borrow" as a temporary replacement. Perhaps another local manufacturer you are on good terms with has a similar spare motor you could borrow.

i agree

Dear shaik imam,

It is a lesson often learned the hard way, but being prepared with an emergency plan for the unexpected failure of your main devices is crucial to a good preventive maintenance plan.

Especially in the case of motors and transformers, at least one adaptable spare, used like a 'loaner car' when your car is down for repair, should be kept on hand.

In the case of major expensive parts, main breakers, especially older ones, It pays to have at the very least, a list of where in the world you could get it repaired or replaced quickly, and a plan of interim action. Then you would not be in a difficult position having to search anxiously while your processes are down costing you money etc.

At 6.6 kV, the power to further destroy your equipment is much greater, and you have not identified the cause of the failure. That being the case, a patch and quick return to service could spell much greater damage for any device, especially a motor, even if technically possible.

Posting pictures always helps, but only a good hands on inspection and evaluation would be appropriate for your situation.

Regards, CJMcGill

Dear

you have to rewind all the phases and there is no other way. by the way have to checked the relay settings and whether the relay works

regards

E ANANDAN

WWW.CHOLARISK.COM

no no no no

Dear shaik imam

You can't bypass even 1 coil at 1 phase, you must repair or replace by new coil , if you need rush, repair the grounded coil only with re insulation may the best choice, in my opinion its will take round 12 days...excluding core repair.

If you have photos, pls attached as much as you have, we will assist you to analyze and offer you best solutions. some time winding fault is not so simple to repair.

Your motor size may similar with this one.

Normally when you repair the burnt coil winding, you should also check the core, found copper melt inside you must clean up and test the core by using Loop or ELCID.

To repair motor as above we need 35 days

Figure as below are as references for you when you need repair partial coil.

Taken from our project partial re insulate on ELIN Hydro Generator 52 MVA

To repair this generator we need 25 days