FAQ

What is the capacity of work that NSE can handle ?

NSE was started as a small workshop to cater repair needs of small motors up to 50 H.P. in the year 1986, through constant development and hard work, today company has established as one of the leading service providing industries in repairs / refurbishment of motors up to 5000 H.P. with all in-house facilities. Presently, with a team of 21 experienced technicians, Company is able to cater to the repairsrehabilitation of all types of motors both at their works as well as at site.

What are the workshop / infrastrure and facilities / equipment available to conduct repairs ?

Testing Facility

Meager :

500 Volt 2 Nos., 1000 Volt 2 Nos., 2500 Volt 1 Nos., 5000 Volt 1 Nos., 6600 Volt 1 Nos.

H.V. Tests :

0 to 5 KV and 0 to 10 KV AC.

Tan Delta Test set :

1 Nos. (Main Branch)

A.C. Motor testing panel :

200 Amps.

D.C. Motor testing panel :

200 Amps thyristerised.

Three phase dimmer :

100 Amps.

Balancing Facility :

Up to 10 tons. (Dahej Branch)

Micro ohm meter – Digital :

2 Nos.

Multi meter – Digital :

6 Nos.

R.P.M. meter – Digital :

1 Nos.

Vibration meter – Digital :

1 Nos.

Surge comparison tester :
Spring tension measurement:

Range up-to 15 KV, Make – JABBALS. 1 Nos.
1 Nos.

Stamping hot spot test :

1 Nos.

Hi-Pot Tester :

Up-To 40 KV.

Inter turn polarity test :

1 Nos.

Induction value (Digital) :

1 Nos.

Drop voltage test :

1 Nos.

Growler test :

1 Nos.

Rocker plate setting meter :

DC motor carbon brush plate setting.

Polarity tester :

Winding inter turn short and polarity test meter.
Workshop Facility

Lathe Machine :

14 Feet Lathe Machine (1 NOS) & 9 Feet Lathe Machine (1 NOS).

Workshop area :

40014 Sq. ft.

Connected power supply :

50 H.P.

Handling facility :

5 ton HOT crane, 15 ton EOT crane.

Transportation vehicles :

Tata ACE 1 Nos. & Tata 407 1 Nos.

Alternator Rotor winding machine capacity :

Up to 10 Ton Rotor

Coil Winding machine :

Up to 1000 Kg. 1 Nos.

Radial Drill :

40MM. (1 NOS)

Hand drill :

5 Nos.

Gas Cutting Set :

2 Sets.

Hand grinder :

3 Nos.

D.C. Welding machine :

400 Amp

A.C. Welding machine :

400 Amp

Hydraulic pullers :

Up to 50 ton 1 Nos. & up to 100 ton 1 Nos.

Mechanical pullers :

5 Nos.

Induction Bearing Heater :

2 Nos.

Oven with automatic temperature control :

L 10 ' x H 8 ' x W 8 '.,15 KW, 0-200 Deg C

Brazing facility :

Oxygen-LPG gas cylinders with all required torches.

Hacksaw machine :

1 Nos.

Hydraulic press :

Up to 200 tons. (Within two months)

Lath machine :

12 ft. 1 Nos.

Crimping tool :

Up to 180 mm hydraulic 1 Nos. Up to 400 mm 1 Nos.

Air compressor :

10 H.P. 1 Nos.

Generator set :

10 KVA Three phase generator set.

Soldering machine :

850 amp heavy duty strip soldering machine.

HT motor coil molding machine :

1 Nos.

Counter :

Coil turns counter. 1 Nos.

Hand air blower :

2 Nos.

CUSTOM SOLLUTION PREPARED FOR MANUFACTURING OF MAGNET COIL BY NEW STANDARD ELECTRICAL

What are the services that NSE is providing ?

 
  • Field Balancing
  • Laser Alignment
  • Re-winding & repairing of HT / LT / MV alternators.
  • Re-winding & repairing HT / LT / MV motors.
  • Re-winding & repairing AC / DC motors.
  • Re-winding & repairing auto transformer.
  • Re-winding & repairing rectifiers / welding equipment.
  • Re-winding & repairing control transformer.
  • Re-winding & repairing permanent magnet DC motor.
  • Re-winding & repairing fork lift motor.
  • Re-winding & high temperature magnetic coil.
  • Re-winding & repairing slip ring motor.
  • All type of mechanical work of electrical machines.
  • Supply all type of spares & accessories of electrical machines.

 

 

How work is conducted on HT motors by NSE ?

Usually we provide PM (preventive maintenance) on site without removing the motor from the foundation & under PM we conclude that motor / alternator require Overhauling or It needs to be Rewound.

The following is the general procedure of preventive maintenance conducted on HT motors, it may vary as per the condition oequipment or client requirement.

HT MOTOR PREVENTIVE MAINTENANCE WORK FLOW

  • Motor will not be removed from foundation throughout the procedure.
  • Removal of all connections, earthlings & covering it for safety & protection.
  • Before starting the job all tools and tackles as required during PM shall be shown to the company official.
  • Motor body / colline fins complete checking, cleaning (Removal of dust, oil, geese etc.).
  • Cleaning & servicing of air cooler ducts/box & repair if required as per the instruction of the party.
  • Motor lead checking and tightening terminal bolts.
  • IR / PI value checking.
  • If everything found normal, no load test will be conducted or additional work will be informed to officials.
  • Bearing noise will be checked and vibration readings will be recorded.
  • If bearing is found damaged it will be replaced after your inspection, bearings will be provided by the company. (If bearing replacement will be carried out procedure for overhauling will be carried out).
  • Special consumables like bearings. Motor spares & greases will be provided by the company.
  • DE & NDE side bearing housing, fan and fan cover will be opened.
  • Old grease will be removed and new greasing will be done.
  • Motor will be re-assembling will be done.
  • Checking of earthing & if necessary rectification of earthing Flat.
  • Motor no load trial testing will be carried out.
  • Test report will be provided furnished with the following details :
    • IR / PI values.
    • High Voltage Test
    • Surge Test
    • Hi-Pot Test
    • TAN δ (DELTA) test if required.
    • Winding resistance test.
    • Inductance test.
    • Vibration analysis.
    • Bearing noise observation.
    • Bearing temperature.

HT MOTOR OVERHAULING WORK FLOW

  • The following procedure will be performed after motor have been transported at our workshop or on site if required.
  • Measurement of IR / PI value.
  • Dismantling of air cooler ducts.
  • Dismantling of HT motor.
  • Dismantling of DE / NDE side bearing housing.
  • Checking / Servicing / Changing of DE / NDE side bearing housing.
  • Removal of the rotor.
  • Rotor bar will be checked.
  • Inspection of bearing condition.
  • If required bearing replacement will be done using Hydraulic Jack.
  • Rotor bearing size will be calibrated.
  • Inspection of the bearings will be made by the company officials if required new bearings will be provided by the company.
  • If required bearing new fitting using bearing induction heater.
  • Greasing of bearings using High temperature SKF original grease.
  • DE / NDE side cover housing bearing size will be calibrated.
  • If bearing housing will be insulated then its insulation value will be checked.
  • RTD and BTD conditions will be checked.
  • Motor winding complete cleaning using petrol and compressed air.
  • Motor slot wedges will be checked.
  • After observing the results of all tests as satisfactory heating the motor in oven & varnishing using Dr. Back F50 insulation varnish.
  • Measuring IR / PI value.
  • Baking the motor in oven at 120 ° temp. For 12 hours.
  • Re-heating and coating stator with Dr. Back Epoxy Gel Coat Red insulating material using spray gun for protecting it from dust, moisture and as a remedy for vibration.
  • Rotor complete cleaning using compressed air and varnishing with Dr. Back Red Oxide.
  • Motor other parts cleaning and painting job.
  • Rotor to be placed in stator and re-assembling as per IP 55 fitting.
  • Replacing of oil seals / sealant, gasket and hardware silica gel as and when necessary.
  • Cooler complete checking and cleaning using compressed air and cooler fitting work.
  • Re-assembling of HT motor.
  • All electrical connections to be done with terminal box and tests to be conducted with no-load trial testing at our workshop.
  • Test report will be provided furnished with the following observations :
    • IR / PI values.
    • High Voltage Test
    • Surge Test
    • Hi-Pot Test
    • TAN δ (DELTA) test if required.
    • Winding resistance test.
    • Inductance test.
    • Vibration analysis.
    • Bearing noise observation.
    • Bearing temperature.

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