Protection, Monitoring & Diagnostics
Standards: IEC 60076-7, IEC 60599 (DGA)
Buchholz, pressure and temperature protection, DGA and partial-discharge monitoring, OLTC and cooling control.
Buchholz Relay
Gas- and surge-actuated relay between tank and conservator.
Pressure Relief Device (PRD)
Spring-loaded valve venting sudden tank overpressure.
Oil & Winding Temperature Indicators (OTI/WTI)
Dial thermometers with alarm/trip contacts.
Oil Level Indicators
Magnetic float gauges for conservator and OLTC compartments.
Sudden Pressure / Rapid Rise Relays
Detects fast internal pressure events.
Online DGA Monitors
Continuous dissolved-gas analysis for fleet-critical units.
Fibre-Optic Winding Sensors
Direct hot-spot measurement in windings.
Marshalling Boxes
Terminal cabinets collecting all monitoring wiring.
Frequently asked
Buchholz (gas) and pressure protection for internal faults, temperature/overtemperature for loading, and differential overcurrent protection with the connected network.
DGA measures the gases dissolved in the oil and diagnoses thermal or electrical faults (partial discharge, arcing, overheating) before they escalate.
Hydrogen is the classic signature of partial discharge or low-energy sparking; combine it with the other gas ratios to separate PD, thermal and arcing faults.
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