Utility networks and distribution substations form the backbone of regional power delivery. ISTS provides specialized turn-key installation, testing, and commissioning services tailored to the high safety and performance standards required by national power utilities.
From 11kV, 22kV, and 33kV switchgear installations to primary protection relay calibration and cable diagnostics, our certified engineers ensure seamless grid integration, strict regulatory compliance, and maximum system reliability.
Full-scope assembly, busbar trunking, and physical positioning for medium-voltage primary and secondary distribution switchgear.
End-to-end injection testing for differential, distance, overcurrent, and earth-fault protection schemes across substation feeders.
Very Low Frequency (VLF) Hipot, Tan Delta, and partial discharge testing on high-voltage cable runs prior to utility grid energization.
Turnkey installation support, turns ratio testing, winding resistance measurement, and Dissolved Gas Analysis (DGA) for distribution transformers.
Every project executed in the utility sector by ISTS strictly complies with Suruhanjaya Tenaga (ST), Tenaga Nasional Berhad (TNB) Electricity Supply Application Guidelines, and relevant IEC/IEEE standards.
We handle all switching programs, safety isolation protocols, and technical documentation required by competent authorities to facilitate smooth grid interconnection and statutory handover.
ISTS specializes in Low Voltage (LV) distribution networks up to Medium Voltage (MV) utility substations operating at 11kV, 22kV, and 33kV.
Our testing engineers perform primary and secondary injection tests on protection relays to verify tripping time curves and ensure selective fault clearance without causing regional utility trips.
Yes, our team includes Suruhanjaya Tenaga (ST) registered competent engineers authorized to supervise isolation, safety verification, and switching operations during energization.
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