Huwor-Oversea

Field PD testing of energised power transformers combines HFCT clamps on the grounding system with ultrasonic sensors on the tank. This practical guide explains sensor placement, interference handling, interpretation and when to escalate to permanent monitoring.

Portable quantitative SF6 leak detectors locate and measure gas loss on GIS and breakers during service. This article sets out a practical field workflow: preparation, leak survey, quantification, repair verification and record keeping.

Transient Earth Voltage (TEV) measurement is the standard energised method for finding partial discharge in switchgear panels. This field guide covers measurement points, background correction, interpretation thresholds and reporting.

Retrofitting UHF partial discharge sensors onto operating GIS improves early fault detection without taking bays out of service. This guide covers sensor types, installation points, noise considerations and integration with monitoring systems.

Choosing a partial discharge detector supplier is a long-term decision. This 8-point checklist covers technology coverage, manufacturing substance, certifications, calibration, documentation, training, OEM support and after-sales – so the instrument becomes a capability, not a shelf item.

Utilities and contractors across Vietnam, Indonesia, Malaysia, Thailand and the Philippines are building inspection capability for expanding grids. This guide covers how to procure power testing equipment – especially live-line detection instruments – in Southeast Asia.

China is the largest source of partial discharge detection instruments for global utilities and contractors. This guide sets out what to evaluate when buying PD detectors from Chinese manufacturers – and how to qualify a supplier beyond the brochure.

A practical instrument set – PD detectors, cable testers, SF6 leak detectors and infrared acoustic imagers – lets a utility or service contractor run comprehensive energised inspections. Equipment-based inspection scales without a permanent on-site service team.

Infrared thermography finds heat, and acoustic imaging finds sound. Combined in a handheld imaging instrument, the two modalities locate loose connections, hot spots and partial discharge in switchgear and substations during a single inspection pass.

SF6 gas management is critical for GIS reliability in the Middle East, where heat and wide temperature swings stress gas compartments. Portable quantitative SF6 leak detectors locate leaks quickly and support a complete gas management programme.