Al Thawadi Electrical & Mechanical Est.

Services & Activities:

UNBEATABLE, RELIABLE AND ENSURED NAME IN THE FIELD OF

REWINDING OF H.V, L.V. AND D.C. MOTORS, GENERATORS AND TRANSFORMERS
SERVICES FOR GENERATORS, GAS TURBINES
MANUFACTURE OF FORMED COILS
COMPLETE SOLUTION FOR MECHANICAL WORKS AND FABRICATION
TRANSFORMER MAINTENANCE & REFURBISHMENT
ONSITE SERVICES FOR INSTALLATION AND DESIGN OF ELECTRICAL PROJECTS
TRADERS OF RECONDITIONED GENERATORS, H.V. MOTORS, TRANSFORMERS AND ALL THE SPARES FOR MOTORS, GENERATORS AND TRANSFORMERS INCLUDING WINDING MATERIALS

Whether your are Multinational or in Small business venture looking for TOTAL QUALITATIVE, ECONOMICAL AND RELIABLE service for your valuable Machinery's/Plants, at THAWADI we provide you with a proven, professional and progressive range of services at anywhere…. Anytime……

Customer Requirements

High Voltage rewinding up to 13.8KV at any rated capacity
Re-design of motor windings
Rewinding of D.C. Motor
Rewinding of traction motors
Rewinding of Armatures and Rotors
Replacement of rotor bars
Replacement of rotor shaft
Re insulating of Core Assembly
Dynamic Balancing of Rotor
Rewinding of Alternators for A.C. and D.C Generators
Fabrication of rotor shaft
Metalizing & machining of journals
End cover metalising & machining
Rewinding of Transformers, Brake coils, Clutch Coils

Dynamic Balancing

We have a 4 ton Dynamic balancing machine Schenk Avery make controlled by Microprocessors digital type which can accommodate shaft diameters up to 420 mm and rotor diameter up to 1400 mm in size. This user-friendly machine gives the accurate reading for which we have been calibrating the same on yearly basis with the support of the manufacturer which eliminates the risk of Mechanical vibrations to any of the motors or generators that we deliver to our customers.

SLIP RING ROTOR REWINDING

Dis-assemble and inspect
Carry out mech. check on rotor Open rotor windings and record data
Rewind as per original data
Preheat Varnish and Bake rotor in air circulating oven.
Skim/Polish slip rings
Dynamic balancing of rotor.
Carry out I.R to earth, winding resistance, impedance and voltage ratio test

STATOR REWIND AC IND. MOTOR

Collect the motor and transport it to our works.
Disassemble and inspect
Inspect all mechanical parts and winding
Test core and evaluate condition of iron laminations, before stripping
Open windings and record data
Strip out windings and clean stator core
Carryout stator core test
Rewind as per original data
Preheat, varnish and bake
Carry out static HI potential test
Carry out I.R winding resistance impedance & varnish drop test
Assemble the motor with new bearings Test run the motor submit the complete test report
Spray Paint and deliver back to your site.

ARMATURE REWINDING

COLLECT THE ARMATURE
OPEN MAIN WINDINGS AND RECORD DATA
OPEN THE EQUALLISER WINDING AND RECORD DATA
STRIP THE WINDINGS FROM THE ARMATURE
REMOVE THE COMMUTATOR FROM THE ARMATURE
CLEAN THE ARMATURE FROM BURRS AND FLASHES
CLEAN THE KNUCKLE SIDE AND COMMUTATOR SIDE
SUPPORTING RINGS FROM THE EXISTING MICA
CLEAN THE SLOTS TO THE REQUIRED FINISH
STEAM CLEAN,PREHEAT ,VARNISH AND BAKE THE ARMATURE IN AIR CIRCULATING OVEN
REINSULATE THE KNUCLE AND COMMUTATOR SIDE
SUPPORTING RINGS WITH THE REQUIRED INSULATION MATERIALS
INSERT NEW COMMUTATOR OF THE SAME DIMENSIONS AS EARLIER TO THE ARMATURE
INSERT THE EQUALLISER WINDING AND BRASE THE SAME TO THE ARMATURE
CARRY OUT BAR TO BAR TEST ON THE COMMUTATOR
INSERT THE MAIN WINDINGS AND BRAZE THE SAME TO THE COMMUTATOR LUGS
CARRY OUT BAR TO BAR TEST AND VOLTAGE DROP TEST ON THE COMMUTATOR
WEDGE THE SLOTS WITH NEW MAGNETIC WEDGES
BAND THE COMMUTATOR SIDE AND KNUCKLE SIDE
OVERHANGS WITH THE REQUIRED TENSION
PREHEAT,VARNISH AND BAKE THE ARMATURE WITH F CLASS INSULATED VARNISH
POLISHING AND UNDERCUTTING OF COMMUTATOR
CARRY OUT BAR TO BAR TEST ON THE COMMUTATOR SEGMENTS
DYNAMIC BALANCING OF ARMATURE WITH ALL ROTATING PARTS
DELIVER BACK THE ARMATURE TO YOUR STORES

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