H‑Infinity

Commissioning is the process of verifying that all control, protection, and safety systems are installed correctly, function as designed, and are ready for operational service. It's the critical transition point between construction and operation — and cutting corners here can result in dangerous failures, costly rework, or extended startup delays. Our commissioning services provide the systematic verification you need to start up with confidence.

01What Does Commissioning Include?

Commissioning covers a comprehensive range of tests and verifications:

▸Relay Testing — Functional testing of protection relays (overcurrent, earth fault, differential, distance) to verify trip characteristics match design settings.
▸Cable Testing — Megger testing, hi-pot testing, and continuity verification of control and power cables to confirm insulation integrity.
▸CT/VT Testing — Ratio, polarity, excitation, and burden testing of current and voltage transformers to ensure accurate measurement and protection.
▸Loop Checks — End-to-end verification of control loops from field instrument through I/O cards to DCS/HMI indication and response.
▸Proof Testing — Functional testing of Safety Instrumented Functions (SIFs) to verify the complete SIS chain from sensor to final element.

02Why Commissioning Matters

Proper commissioning prevents costly operational problems:

▸Protection Reliability — A relay with incorrect wiring or settings may fail to trip during a fault, causing equipment damage or cascading outages.
▸Operational Confidence — Operators need to trust that when they press an emergency stop, the process actually shuts down. Proof testing confirms this.
▸Early Defect Detection — Commissioning catches installation errors (reversed polarity, broken cables, incorrect wiring) before they cause operational problems.
▸Regulatory Compliance — Many jurisdictions require documented commissioning as part of startup permits and insurance requirements.

03Our Approach

We follow a systematic commissioning methodology:

1. Pre-Commissioning Checks

Verify installation completeness, mechanical alignment, electrical connections, and power supply before energising any equipment.

2. Individual Equipment Testing

Test each device independently — relay injection, CT/VT ratio checks, instrument calibration, and insulation resistance measurements.

3. Integrated System Testing

Test complete control and protection loops including field devices, cabling, panels, DCS/HMI, and final elements — simulating real operating conditions.

4. Documentation & Handover

Complete commissioning registers, test reports, as-built settings, and punch list close-out for operational handover.

04Scope of Commissioning

Our commissioning services include:

▸Commissioning Plan — Detailed commissioning procedure document with test steps, acceptance criteria, and safety requirements.
▸Relay Injection Testing — Primary and secondary injection testing using calibrated test sets (OmniTest, Argus, DCMV).
▸SIS Proof Testing — Functional testing of Safety Instrumented Functions per IEC 61511 requirements.
▸Cold & Hot Commissioning — De-energised testing (cold) followed by energised functional testing (hot) with process fluid.

05Why H-Infinity

Our commissioning team brings field experience from dozens of greenfield and brownfield projects across the GCC. We've commissioned protection systems for 400 kV substations, safety systems for petrochemical plants, and control systems for waste-to-energy facilities. We use calibrated test equipment, follow documented procedures, and deliver commissioning registers that give our clients confidence at handover.

Commissioning Services