Specialized Maintenance Services
Water leak Repair for water Cooled Generator
There may so different problem occurred with water cooled generator in the world.
If there is problem on the water cooled generator, it spending so much hours to recover or to the normal operating condition so it will produce much financial loss to customer.
ENG1 has collected water cooled machine major fault issues and maintenance capabilities with the long and plenty of experiences.
- Water leak diagnosis / test for water cooled generator(Pressure, Vaccum, He Trace, Capacitance Mapping)
- Repair Water Box
- Repair Clip to Strand ,Windows( Tig Brazing, VPI Technique)
- Wormhole Repair
- Design modification or replacement of various fittings
- Repair Parallel Ring water leak
- Repair PTFE Hose
Replacement Generator Core services
It must detect core fault in advance through inspection or test technique to prevent catastrophic damage.
Generator care fault can be occurred by intrusion of foreign material, worker’s careless and poor maintenance.
ENG1 is carrying out core inspection , repair with various repair technique.
- Core Test(ELCID, Full Flux Test)
- Repair Core(Grind, Etching, Mica Insertion)
- Core re-stacking(Partially, Fully)
Thermal Power Generator services
ENG1 performing field maintenance or retrofit project for the high capacity water cooled generator in thermal power plant.
This work can be applied to high capacity of generator stator and rotor.
During the planned overhaul period, ENG1 collect all local data for the application of retrofit and carrying out reverse engineering to complete design.
- Design bar, supply and installation
- Test, Inspection/ evaluate remained life cycle
- Rewinding and repair core
- Design modification and evaluation of structure
- Inspection and investigation of overheat or cooling issues
- etc
- Design ,Supply and installation of Copper
- Repair and electrical test field Pole
- Replacement of Collector Ring and Fan
- Replacement of slot wedge and retaining ring
- Acquire Vibration data and calibration
- etc
Hydro Power Services
Most of Hydro power plant generators are vertical salient pole machine.
Comparing to horizontal cylindrical rotor in the thermal power plant, there will be various problems are occurred in the stator, rotor. ENG1 carrying out maintenance of hydro powered generator rotor and stator.
- Design ,supply and installation bar
- Inspection, Test and life evaluation
- Rewinding and repair Core
- Design modification and replacement work
- Inspection overheat or cooling system issue
- Evaluate structure and analysis stress of GEN Components
- etc
- Design, supply and installation of copper
- Test, Inspection and life evaluation
- Repair or replace field Pole
- Electrical test and NDT
- Maintenance Bearing and components
- etc
Exciter Repair Services
ENG1 providing excellent services of brushless exciter repair and rewinding program.
ENG1 expert acknowledge all complexity of exciter, deterioration or contamination issues, mechanical stress and provide efficient solving technique.
Through the cleaning, rewinding, component replacement, overhaul, ENG1 expert trying to keep best condition of excitation system.
- Exciter maintenance (Sigle, Double wheel)
- Rewinding Exciter stator, rotor coil
- Replacement of exciter Components
- Electrical test
- Characteristic test , Replacement of Diode, SCR, Fuse, Capacitance
- Repair Banding
Replacement or Machining Collector Ring
Collector Ring is major components of exciter brush system.
If there is poor management of brush gear system during the normal operating, there will be emergency power generation system stop occurred due to loss of excitation.
ENG1 provide various services of exciter, Collector Ring, Brush Gear System.
- Optimal design of Brush Gear components
- Design, manufacture and supply Collector Ring , insulation Sleeve
- Design, manufacture, supply and installation of Stud Lead Bolt or related components
- Machining Collector Ring (lathe machining, grinding, polishing)
Generator FFA Test service
Generator FFA test service preventing structure resonance condition by keeping the optimal electrical/mechanical stiffness.
ENG1 establish generator structural reliability by reinforcement of weak portion after proved soundness test.
- Stator end winding resonant test(Bump Test, FFA Test)
- Design modification of stator end winding supporting structure
- Design modification of rotor end winding blocking structure
- Electro magnetic resonant test of stator body
- Install Belly Band, add Mass, Re-binding technique
Chemical Cleaning of Water Cooled Generator bar
Water cooled generator bar consisted with Hollow / solid conductor, Hollow Conductor.
If there is abnormal cooling system operating, byproduct from the copper corrosion can blocking smooth water flow then it can increase bar operating temperature enough to break bar insulation material and brings ground fault finally.
ENG1 providing chemical cleaning technique to remove oxide copper material from the inside surface of hollow conductor.
- Inspection Water Box inside using Borescope
- Inspection WTR Box after disassembling Teflon Tube
- Cut Water Box and Repair
- Line up for chemical cleaning
Capacitance Mapping of WTR Cooled genertator
ENG1 analyzed water leak causes of water cooled generator with assistant capacitance mapping method.
Through this capacitance mapping, it is enable to check if there is moisture absorption in the insulation material of the bar and prevent ground fault in advance to increase the machine reliability from the fatal accident.
- Detect Water Box, Windows, Fitting, Teflon tube brazed area
- Poor coil manufacturing technique on Clip to Strand