Advanced Diagnostics for Safe, Reliable & Long-Life GIS Operation
GIS CONDITION MONITORING
Switch Energy Solutions (SES) provides specialised condition monitoring services focused on Partial Discharge (PD) detection and SF₆ gas quality measurement, ensuring early fault identification, zero-leakage performance, and long-term asset reliability. Our diagnostics help prevent catastrophic failures, reduce downtime, and support predictive maintenance strategies for utilities and industries.
Partial Discharge (PD) Measurement & Analysis
Early detection of insulation deterioration inside GIS compartments.
PD Testing Methods We Use
- UHF (Ultra High Frequency) PD Detection: Detects internal PD activity using UHF sensors installed on GIS chambers.
- Identifies surface discharges and insulation defects.
- Locates mechanical and Electrical discharge signatures inside GIS enclosures.
PD Analysis Includes
- PD pattern recognition
- PRPD (Phase-Resolved PD) analysis
- Localization of PD source
- Severity assessment
- Trending & comparison with historical data
Common PD Issues Detected
- Insulation defects
- Particle contamination
- Loose connections
- Spacer degradation
- Surface tracking
- Corona discharge
SF₆ Gas Quality Measurement & Diagnostics
Ensuring the insulating gas inside GIS maintains its dielectric strength and purity.
Gas Parameters We Measure
- Moisture (ppm / dew point): High moisture leads to insulation breakdown.
- Purity (%): Ensures SF₆ concentration meets OEM standards.
- Decomposition Products (SO₂): These indicate internal arcing or insulation deterioration.
Gas Measurement Services
- On-site gas sampling
- Portable gas analyser testing
- Dew point measurement
- Gas density & pressure verification
- Leak detection & rectification
- Gas filtration & purification (if required)
Benefits of Gas Monitoring
- Prevents internal flashovers
- Ensures safe operation
- Detects early insulation degradation
- Supports predictive maintenance
- Ensures environmental compliance
Online & Offline Monitoring Options
Tailored deployment architectures depending on criticality.
Online Monitoring
Ideal for critical substations and unmanned GIS stations.
- Continuous PD monitoring
- Real-time gas density tracking
- Alarm & event logging
- Remote monitoring integration
* Ideal for critical substations and unmanned GIS stations.
Offline Monitoring
Suitable for planned maintenance and routine inspections.
- Periodic PD testing
- Annual gas quality checks
- Shutdown-based diagnostics
- Commissioning-stage verification
* Suitable for planned maintenance and routine inspections.