High Voltage & Medium Voltage Testing (Up to 33kV)
Overview
High Voltage (HV) and Medium Voltage (MV) testing up to 33kV comprises specialized procedures—such as VLF (Very Low Frequency) testing, insulation resistance (Megger) checks, and partial discharge analysis—to verify the integrity, safety, and insulation strength of cables, switchgear, and transformers.
These tests are critical during commissioning or maintenance to detect defects before energizing, typically applying voltages ranging from 2,500V to 33kV (or up to 48kV peak) to ensure reliability in industrial and utility power systems.
These tests are critical during commissioning or maintenance to detect defects before energizing, typically applying voltages ranging from 2,500V to 33kV (or up to 48kV peak) to ensure reliability in industrial and utility power systems.
Applications
- Substations
- Cable Systems
- Transformers
- Switchgear
- Busduct
Services Include:
- Insulation Resistance and Polarisation Index testing
- HV & MV cable withstand and sheath integrity testing
- Tan Delta (Dissipation Factor) testing for power cables to assess insulation ageing and moisture ingress
- Tan Delta testing for transformers and bushings to evaluate dielectric condition
- Contact resistance measurement of circuit breakers, isolators and busduct joints
- Circuit breaker timing and operation testing
- Busduct insulation, continuity and joint resistance testing
- Transformer ratio, winding resistance and vector group verification
- Earthing system resistance and continuity testing
- Pre-energisation inspection and energisation readiness assessment