01
Transformer testing and diagnostics
Condition assessment that identifies developing faults, evaluates equipment performance and supports preventive maintenance planning. Test scopes are selected to suit the equipment and project requirements.
Services
Testing, overhaul, protection and high-voltage works.
From routine preventive maintenance through to major overhaul and EHV installation, our services cover the equipment that matters most to a power system — and the diagnostics that keep it in service.
02
Transformer overhaul and refurbishment
Inspection, repair, overhaul and refurbishment of distribution, power, furnace, rectifier and other specialised transformers.
Typical scope
- Initial inspection and fault investigation
- Internal inspection
- Component repair or replacement
- Bushing and gasket replacement
- Oil-leak rectification
- Radiator repair or replacement
- Transformer oil treatment
- Vacuum dehydration and heating
- Cleaning and repainting
- Electrical testing
- Final inspection and recommissioning
03
Protection relay testing and calibration
Inspection, testing, calibration and verification of protection relays, so electrical systems respond correctly during faults and abnormal operating conditions.
04
Transformer protection systems
In partnership with SERGI Protection, specialised transformer protection solutions for new and existing installations — intended to reduce the consequences of serious internal faults in critical oil-filled equipment.
Typical scope
- Assessment of existing transformer protection requirements
- Protection-system design and equipment selection
- Supply of SERGI transformer protection systems
- Installation of new transformer protection systems
- Retrofitting protection systems to existing transformers
- Modification and upgrading of existing installations
- Integration with transformer and plant systems
- Inspection and functional testing
- Testing and commissioning
- Preventive maintenance and servicing
- Replacement parts and technical support
- Coordination with clients, consultants and specialist personnel
05
Transformer-system erection and installation
Manpower, equipment and technical support for transformer positioning, assembly, erection, connection, inspection, testing and commissioning.
Typical scope
- Transformer unloading and positioning
- Assembly of transformer components
- Bushing installation
- Radiator installation
- Cable and busbar connections
- Oil handling and treatment
- Auxiliary-system connections
- Pre-commissioning inspection
- Electrical testing
- Final commissioning support
06
Exothermic welding and earthing grid construction
Design support, installation and testing of earthing systems for substations, power stations, industrial plants and infrastructure projects. Connections are made by exothermic welding, which fuses copper conductors into a single molecular bond that will not loosen or corrode like a mechanical clamp.
Typical scope
- Earthing grid layout and conductor routing
- Excavation, trenching and earth-pit construction
- Copper tape, conductor and earth-rod installation
- Exothermic (thermite) welded connections
- Cable-to-cable, cable-to-rod and cable-to-steel joints
- Bonding to structures, fences, rails and equipment
- Earth-electrode and soil-resistivity testing
- Earth-resistance measurement and reporting
- Repair and extension of existing earthing systems
- As-built records and test documentation
07
Power-cable laying
Power-cable laying and installation with handling, routing and installation procedures appropriate to the project environment.
08
High-voltage and EHV cable termination
GIS and OIS cable-termination works at voltage levels up to 500kV, delivered in collaboration with qualified specialist partners. This combines KTM’s local project coordination, site support and power-system experience with the specialist expertise that EHV termination demands.
09
EHV system installation and erection
Installation, assembly and erection of extra-high-voltage equipment and associated systems for substations, power-generation facilities and industrial projects. Specialised scopes are performed with suitably qualified technical partners where required.
10
Reactor servicing and refurbishment
Inspection, servicing, repair and refurbishment for electrical reactors.
11
Transformer bushing installation and servicing
Inspection, removal, installation, replacement and servicing of transformer bushings.
12
Transformer oil purification and testing
Filtration, purification, sampling and testing of transformer oil to remove moisture, dissolved gases and contaminants, and to evaluate the condition of transformer insulation oil.
13
Vacuum dehydration and controlled heating
Processes used to reduce moisture within transformer insulation systems and support the restoration of insulation performance. The process is selected and controlled according to the transformer’s condition, construction and repair requirements.
14
Custom fabrication
Electrical cabinets, transformer components, generator-set canopies, control panels, steel enclosures and other purpose-built items fabricated to approved drawings and project specifications.
Typical scope
- Electrical cabinet fabrication
- Feeder-pillar fabrication
- Metering-cabinet fabrication
- Street-lighting control cabinets
- Solar control panels
- Transformer-related components
- Generator-set canopies
- Custom steel structures and enclosures
- Modification of existing cabinets and equipment
15
Rectifier transformer repair
Inspection, servicing, testing and repair of rectifier transformers and associated control components used in electrostatic precipitator and industrial power applications.
16
Generator set repair and maintenance
Servicing, fault diagnosis, repair and overhaul for diesel generator sets, including the mobile units we build and supply. We also carry engine and alternator spare parts so a set can be returned to service without waiting on an overseas order.
Typical scope
- Scheduled preventive maintenance
- Engine and alternator inspection
- Fault diagnosis and troubleshooting
- Control panel and instrumentation checks
- Automatic transfer switch testing
- Load testing and commissioning
- Canopy and enclosure repair
- Engine and alternator spare parts supply
17
Generator circuit breaker servicing
Inspection, servicing and testing of generator circuit breakers to support safe operation and dependable interruption performance.
18
Generator model validation
Model validation for five-year maintenance or commissioning purposes.
19
Vacuum switching equipment
Testing, servicing, troubleshooting and repair for vacuum contactors and vacuum circuit-switching equipment.
Typical scope
- Vacuum circuit contactors
- Vacuum contactor switches
- Vacuum circuit breakers
- Associated control and protection components
20
Switchgear testing and maintenance
Inspection, testing, preventive maintenance, troubleshooting, repair and partial restoration for low-, medium- and high-voltage switchgear systems.
Typical scope
- Visual and mechanical inspection
- Cleaning and servicing
- Insulation testing
- Contact-resistance testing
- Breaker testing
- Protection and control checks
- Fault diagnosis
- Component repair or replacement
- Bus-coupler repair
- Partial switchgear restoration
- Testing and recommissioning
21
On-load tap changer servicing and testing
Inspection, servicing, testing and repair of on-load tap changers as part of scheduled transformer overhaul and maintenance programmes.
Service highlights
What clients get
End-to-end technical capability
Supply, fabrication and installation through testing, commissioning, maintenance, repair, refurbishment and upgrading — one local technical partner for planned projects and urgent corrective work.
Workshop and on-site support
Field inspection, emergency repair, preventive maintenance, workshop refurbishment, component fabrication, major overhaul, testing and commissioning — carried out wherever the equipment and project require.
Customised solutions
Beyond standard maintenance and repair, our team supports custom fabrication, system modification, component sourcing, retrofitting and equipment upgrading.
Documented and tested
Work is performed to applicable industry standards, client specifications and approved procedures, and equipment is inspected and tested before being returned to service.
Planning an outage or facing a fault?
Tell us the equipment, the symptoms and the timeline — we will advise on the right scope.