Our services


Relay System Technology offers services in all aspects of the protection, control and measurement of electrical systems (380V to 400kV).

The most innovative in the industry.

Produced according to strict industry specifications.

Safe and reliable installation of a range of products.

Our team has years of experience behind them.

Design, Manufacture, Installation
and Commissioning of:

Protection, control and measurement systems

Generator AVRs and Static Excitation Control Schemes


Transformers and Reactors






Design and Specification of Systems

Let us provide the equipment for cost effective, efficient power generation.

Our systems ensure that electricity is distributed as effectively as possible.

We create efficient electrical networks for your business.

We offer regular maintenance of equipment/devices as required.

Generation, Distribution, Reticulation
and Maintenance:

Protection relays and schemes to improve performance and security

All types of current and voltage transformers

Transformer protection devices

Circuit breakers

Motors, capacitors, reactors, etc.

All electrical functions of generators

Existing installations (re-testing and audit of)

Existing installations (re-engineering and / or refurbishment of)

Power Generators: 500kW to 600MW

Generator Excitation Systems

Generator Voltage Regulators (suppliers of)

Rotor winding tests RSG: RO

Stator winding tests (capacitive discharge and tip-up voltage)

Voltage Regulators


Short circuit characteristic

Open circuit characteristic

Rotor stray flux analysis

Excitation related vibration analyses

Voltage regulator response (test and setting)

Generator heat-run (tests)

Synchronisation (tests)

Post fault investigation of protection and plant failures.

Recommendations and solutions to avoid further occurrences.

Audit of existing protection systems and plant via performance testing and evaluation.

Recommendations regarding maintenance and upgrading.