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TNB Repair And Maintenance Sdn. Bhd. (TNB REMACO) has strategically established itself into four main business services

What We Offer

Maintenance & Repair Services

Mechanical Field Services

  • Overhaul, repair and maintenance of:
    • Gas Turbines (E-class, F-class, J-class, all major manufacturers)
    • Steam Turbines (all types and makes)
    • Aeroderivative Gas Turbines (from LM2500, LM6000, RB211 and Avon)
  • Hydro Turbines (all types and makes)
  • Repair and maintenance of boilers
  • Repair and maintenance of balance of plant (BOP) e.g.: pumps, fans, valves, gear boxes etc.
  • Technical Advisory services
  • On-site dynamic balancing of rotors (up to 100 tons)
  • Borescope inspection
  • Special equipment and tools:
    • Onsite low speed balancing machines (30 and 100 tons)
    • Onsite 8 meter long lathe and blade tip grinding machines for Siemens Gas Turbine V94.2
    • Onsite 5 meter diameter Top Cover and Bottom Rings machining equipment for Francis Runner
    • Onsite automatic and manual rotators for steam turbine and gas turbine rotors
    • Various portable tool containers for Heavy-Duty Gas Turbines, large Steam Turbines and Hydro Turbines
    • Various tools for GE Gas Turbine LM2500 Hot Section Exchange

Electrical Field Services

  • Major and minor overhauls of generators from various OEM’s
  • Static and brushless exciter inspection
  • Seal oil systems overhaul for hydrogen-cooled generators
  • Stator re-wedging
  • Stator winding repairs and rewinding
  • Rotor winding repairs and rewinding
  • Rotor retaining ring removal and inspection
  • Exciter winding repairs and rewinding
  • Generator parts repair or refurbishment
  • Visual and borescope inspection on stator and rotor
  • Heat exchanger hydrostatic pressure testing
  • Alignment of generators from various OEM’s
  • Dry ice cleaning of electrical windings
  • Leakage test for hydrogen-cooled generators

Control And Instrumentation Field Services

  • Instrumentation calibration for power plants, process plants, oil and gas industries
  • Control system upgrading of DCS such as Mark V & VI, Diasys Up, Diasys Netmation, Valmet
  • Electrical retrofit g. breaker installation and AVR upgrading
  • Troubleshooting for electrical, C&I and plant process
  • Commissioning after overhaul of Gas Turbine, Steam Turbine, Hydro Turbine, Diesel Engine
  • Process optimization for power plant and process plant g.: boiler control tuning, turbine control tuning

Refurbishment of Power Plant Machinery Component

  • One-Stop center for repair and refurbishment, providing the need for independent, adaptive, accessible and flexible turbo-machinery services
  • Refurbish a wide range of rotary, stationary and structural components including Hot Gas / Steam Path components (vanes, blades, shrouds and combustors)

Integrating our experience, high-end equipment and expertise, TNB REMACO Repair Centre offers the following services

  • Repair And Refurbishment
    • Gas Turbines
    • Steam Turbines
    • Hydro Turbines
  • Repair And Refurbishment
    • White Metal Bearing
    • Gearbox
    • Pumps and Valves
  • On-Site Repair
    • GT Exhaust system
    • Boiler inspection and repair
    • Rotor assessment and repair
    • Balance of Plant and Auxiliaries
    • On-Site Machining
  • Reverse Engineering
    • 3D Dimensional Scanning
    • Finite Element Analysis
    • Parts Fabrication

Laboratory And Metallurgical Analysis

  • Material Analysis
  • Failure Investigation
  • Remaining Life Assessment
  • Microstructure Analysis
  • Destructive Testing

Laboratory And Metallurgical Analysis

  • Thermal Coating (HVOF/Plasma)
  • Vacuum Heat Treatment
  • Blasting and Shot Peening
  • Brazing
  • Burner Flow Test
  • Coupon Replacement
  • Chemical Stripping
  • Stationary Frequency Test

We have state-of-the-art facilities to comprehensively support our services:

  • Vacuum Furnace
  • Acid Stripping
  • 100 Tons Portable Lathe Machine
  • Machine Shop
  • Non-Destructive Testing
  • White / Blue Light Scanner
  • Coordinate Measuring Machine
  • Laser Welding
  • 75 Tons Overhead Crane
  • Semi-automated Shot Peening
  • Special Tools and Fixtures
  • Welding Positioner

Test & Diagnostic Services

Test Services

  • Performance Test
  • Battery Discharge Test
  • Battery Conductance Test
  • Protection Relay Calibration Test
  • Tested Annual Available Capacity (TAAC) Test
  • Current Transformer (CT) and Voltage Transformer (VT) Testing & Analysis
  • Transformer Guard Test
  • Protection Relay Rehabilitation and Installation
  • Energy Meter Verification
  • GPS Time Stamping
  • Transformer Stability Test
  • Malaysia Grid Code Test

Electrical Diagnostic Services

  • Electrical Core Imperfection Detection (ELCID) Test
  • Stator End Winding and Rotor Body Visual Inspection
  • Winding Resistance Test
  • Stator / Rotor Conductor / Insulation Resistance (IR / PI) Test
  • Wedge Tightness Detector (WTD)
  • DC Hipot Test up to 70kV
  • AC Hipot Test up to 25kV
  • Recurrent Surge Oscillograph (RSO) Test / Voltage Drop Test
  • Online Partial Discharge (PD) Measurement
  • Offline Partial Discharge (PD) Measurement up to 25kV
  • Online PD Continuous Monitoring Systems
  • Offline Tangent Delta Measurement up to 25kV
  • Cable Tangent Delta and PD Testing
  • Offline Electromagnetic Interference (EMI) Scan of Electrical Plant (Isolated Phase Bus (IPB), Stator, etc)
  • Offline Corona Probe Scanning for Generator IPB
  • Electrical Signature Current Analysis

Mechanical Diagnostic Services

  • Vibration Measurement and Analysis on Turbomachinery and Auxiliary Equipment
  • In-situ Balancing
  • Vibration Probe Verification
  • Bump Test and Modal Analysis
  • Non – Destructive Testing (Penetrant Testing, Magnetic Particle Testing, Ultrasonic Testing)
  • Thermography Inspection
  • Acoustic Ultrasound Inspection
  • Borescope Inspection
  • Condition Based Monitoring (Vibration, Thermography Ultrasound)

Calibration Services

  • Process Instrument Calibration (Pressure,Temperature, Flow)
  • Dissolved Gas Analysis
  • Control and Instrumentation Upgrading

Electrical Workshop Transformer Routine Maintenance

  • Transformer Servicing
  • Transformer Oil Filtration
  • Installation and Dismantling of Transformer and Auxiliaries
  • Retrofitting of Transformer

Rotating Electrical Equipment Repair And Maintenance Services

  • Rewinding / Overhaul / Alignment of Motors and Generators
  • Motor Testing and Analysis
  • Motor and Generator Commissioning
  • Bearing Inspection Works
  • MV/LV Motor Surge Test
  • Dynamic Balancing Works
  • Drying Oven Rental Services

Transformer Test

  • Insulation Resistance Test
  • Winding Resistance Test
  • Excitation Current Test
  • Turn Ratio Test
  • Tan Delta Test
  • Frequency Response Analysis Test
  • Dynamic Resistance Measurement on OLTC
  • Frequency Dielectric Spectroscopy Test
  • Acoustic Partial Discharge Test

Breaker Maintenance And Testing

  • Servicing Works up to 33kV
  • Vacuum Integrity
  • High Potential Test
  • Insulation Test
  • Contact Resistance Test
  • Breaker Supply, Commissioning and Refurbishment

Diesel Generator

  • Overhaul and Troubleshooting

Insulated Phase Bus Duct (IPB)

  • Supply and Servicing
  • Offline PD Testing

Project & Technical Services

Project Management Services

Provide technical and engineering services to ensure projects will be completed on time, within allocated cost and to the required quality standards

Areas of expertise

  • Power Generation Plant Projects
    • Construction
    • Relocation
    • Rehabilitation
    • Demolition
  • Transmission and Distribution Projects
    • Land acquisition and wayleave services
    • Construction

Services offered

  • Preliminary studies
  • Conceptual design
  • Tender document preparation
  • Tender evaluation
  • Management of project/contract during implementation, including technical review
  • Assist client with resolution of contract disputes
  • Assist client with Project close-out and handing-over

Engineering, Procurement, Construction And Commissioning

Design and construction of power-related projects within Malaysia and overseas on a full turnkey basis

Areas of expertise

  • Power Generation Plants
    • Diesel Generator sets
    • Open-cycle Gas Turbines
    • Combined-cycle Gas Turbine
    • Co-generation plant
    • Renewable energy, including hybrid
  • Transmission and Distribution Projects
    • Transmission line
    • Substations
    • Underground and overhead cabling


  • Civil and infrastructure works, including slope repair

Operation and Maintenance Management

Operation And Maintenance (O & M) Services

  • Day-to-day Operations and Routine Maintenance
  • Complete plant staffing
  • Scheduled Maintenance
  • Preventive Maintenance and Corrective Maintenance
  • Predictive Maintenance Programs (Risk Based Inspection, Condition Monitoring)
  • Inventory Management
  • Site documentation and ISO procedure development
  • Site-specific computerized maintenance management programs
  • Comprehensive training
  • Environmental, Health and Safety programs
  • Engineering and Technical Support

TNB REMACO O & M Services can provide management and operation of:

  • Power Plants
    • Open & Combined Cycle Gas Turbine
    • Hydro
    • Desalination Plant
    • Oil, Gas and Industrial Plants
    • Conventional Thermal (Coal, Oil, Gas)
    • Utilities
    • Process Flows

Coal O & M And Management Contract

  • Coal stacking to stock pile
  • Coal reclaiming to bunker
  • Recirculation of coal
  • Day-to-day operations
  • Scheduled maintenance (O & M planning/scheduling, plant rehabilitation, ) of Coal Stock Yard and Bulk Terminal

Plant Rehabilitation

  • Provides technical and management consultancy and owner’s engineer for conversion
  • Relocation
  • Refurbishment and/or rehabilitation of power plants/utilities

Plant Technical And Management Consultancy

  • Technical project management
  • Technical feasibility studies and utility management consultancy

Track Record

Soaring Beyond Our Shores
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TNB Repair And Maintenance Sdn. Bhd.

Level 23A PJX-HM Shah Tower,
No. 16A, Persiaran Barat,
46050 Petaling Jaya, Selangor, Malaysia.