Scope Of Work

1. Cleaning of motor prior to rewinding.

2. Immediately on receipt of the stator / motor, Inspection is done and physical damage of the motor if any is reported. Any damage witnessed when the motor is delivered back which has not been pointed out earlier by the company will be deemed to have occurred due to the party’s negligence. In such case, it will be the responsibility of the company to do the necessary repairs at no extra cost to make the motor good.

3. After dismantling of the stator, flux loop test is carried out & the report is sent to our clients. If company notices any additional repairs, which are required to be done including stator core staggering, besides rewinding of the motor, The same is informed and carry out these additional repairs only after prior approval of clients.

4. The motor burnt-out winding is not removed by gas torch/blow lamp heating as it damages stator laminations interlayer insulation. We use modern technique for this process.

5. The motor is rewound as per the original winding data in electrolytic grade new copper & for the ‘F’ Class insulation only along with suitable fiber glass wedges & leads of sufficient length. Winding is thoroughly baked and two coats of Dr. Beck’s class F varnish are applied.

6. The overhang length in the rewound stator will be as per the original length and not be more as it will touch the end shield.

7. The motor is painted with primer & two coats of gray epoxy paint.

8. Company provides a Test certificate which indicates all the parameters for effective functioning of the motor.

9. New flexible leads are used for rewinding job. Normally only three flexible leads will be brought out unless specified otherwise or as per the motor’s original design.

If any hot spots are noticed during full flux loop tests, on the stator core, total core re-insulation / re-staggering is done in the following manner.

1. Note the length of core and its location in the body before dismantling of the core.

2. Remove all the laminations

3. Clean the laminations thoroughly, after filling with caustic etc.

4. Dry the laminations thoroughly, after filing with caustic etc.

5. Stack all the laminations to its original length by staggering the laminations.

6. Fix the complete stack in the body in the same location and lock it in original positions.

7. All core slots should be made uniform throughout, by using proper size guide pins etc.

8. Testing of the core again for checking any hot spots

9. If hot spots are still persisting, the job is to be re-done.

Re-metallization is carried out by metal spraying Metco process using Fero – Nickle wire.

Re-metallization is carried by as per relevant tolerances specified for particular bearing fit. Proper care is taken so that no damage is done to greasing arrangement & cover insulation.