Power substations are the nodes of India's electrical grid — stepping voltage up and down, switching power flows, and protecting the network from faults. Every transformer, circuit breaker, protection relay, CT, PT, busbar, and cable must be maintained and tested to the highest standard. Green Watt provides both the instruments and the field expertise that substation engineers need.
Key Applications
Transformer Diagnostics
- ›Winding resistance testing — detects tap changer contact problems and winding damage
- ›Turns ratio testing (TTR) — verifies ratio accuracy and tap changer sequence
- ›Oil BDV testing — monitors oil dielectric condition
- ›Tan delta testing — insulation ageing assessment for windings and bushings
- ›SFRA — mechanical integrity assessment after through-faults or transportation
- ›Thermal imaging — bushing hot spots and cooler blockage detection
Protection & Relay Testing
- ›Protection relay test systems for commissioning and periodic testing
- ›IEC 61850 GOOSE and sampled values testing for modern numerical IEDs
- ›CT accuracy and excitation curve verification
Insulation & HV Testing
- ›Hipot and VLF testing of cable circuits leaving the substation
- ›Partial discharge surveys of GIS, transformers, and cable sealing ends
- ›Insulation resistance testing of equipment prior to energisation
Metering & Thermal
- ›CT/PT analyser for metering transformer accuracy verification
- ›Reference energy meters for installed revenue meter testing
- ›Infrared thermography of all primary plant, busbar connections, and LV switchgear
Products Used in This Sector
CT/PT Analyzer
Transformer Diagnostics
Relay Testing Equipment
Protection & Relay Testing
Transformer Turns Ratio Tester
Transformer Diagnostics
Winding Resistance Tester
Transformer Diagnostics
Tan Delta Tester
Transformer Diagnostics
SFRA Testing
Transformer Diagnostics
Oil BDV Tester
Transformer Diagnostics
Thermal Imagers
Thermal & Optical Imaging
Hipot & VLF Testers
High-Voltage & Insulation Testing
Partial Discharge Detectors
Partial Discharge & Cable Diagnostics
Clients in This Sector
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