GE HYDRAN M2 Transformer Online DGA Gas‑in‑Oil Monitor

GE HYDRAN M2 is a continuous online dissolved gas and moisture‑in‑oil monitoring device for oil‑filled power transformers. It adopts fuel‑cell sensing principle to continuously track fault‑related dissolved gases and oil moisture, detecting early latent faults such as partial discharge, overheating and arcing inside transformer equipment.

This monitor supports composite‑gas or hydrogen‑only sensor options, complies with IEEE transformer diagnostic models. It provides multiple communication interfaces and configurable relay alarms, directly mounted on transformer oil valve without extra pump piping, widely used as spare replacement for power plant, utility substation and industrial transformer condition‑monitoring cabinet maintenance projects.

Main Specifications

• Brand: GE Vernova (GE Energy)
• Model: HYDRAN M2 (Mark‑III)
• Product Type: Transformer Online DGA Dissolved Gas‑in‑Oil Monitor
• Gas Measurement Range: 0‑2000 ppm H₂ equivalent
• Moisture Measurement: 0‑100% RH relative humidity in insulating oil
• Sensor Option: Composite gas sensor or hydrogen‑only sensor
• Communication: RS‑485 Modbus RTU, optional Ethernet TCP/IP
• Power Supply: 90‑264 VAC, 47‑63Hz
• Enclosure Rating: NEMA 4X / IP66 environmental protection
• Operating Temperature Range: ‑40°C ~ +85°C ambient

Core Functions

• Continuously detect dissolved fault gases including hydrogen, carbon monoxide, acetylene and ethylene in transformer insulating oil
• Real‑time measure moisture content inside oil to judge insulation paper aging and gasket leakage risk
• Built‑in IEEE‑standard transformer calculation models for winding hot‑spot and insulation condition assessment
• Support multi‑channel configurable relay alarms for gas concentration, moisture threshold and equipment fault status
• Local display and keypad for on‑site parameter setting, data viewing and trend record query
• Modbus / DNP3 communication protocol realizes seamless data upload to SCADA and DCS monitoring system
• Direct installation on transformer oil valve, no auxiliary pump and complex external pipeline required
• Compatible with mineral oil and ester‑type environmental‑friendly insulating oil medium
• Automatic periodic self‑diagnosis for sensor and circuit health status with fault alarm output
• Provide early‑warning data support for transformer predictive maintenance to avoid unplanned power outage accidents

Application Scenarios

• Power plant main transformer and auxiliary oil‑immersed equipment online condition‑monitoring systems
• Electric utility substation medium‑and‑large power transformer DGA monitoring cabinets
• Petrochemical plant high‑capacity oil‑filled transformer and reactor monitoring units
• Metallurgy industry heavy‑load oil‑immersed power equipment fault early‑warning projects
• Industrial large‑factory critical power transformer asset health management applications
• New‑energy station step‑up transformer on‑line dissolved gas monitoring systems
• Transformer monitoring system renovation, DGA monitor replacement and technical upgrade projects
• Existing substation Hydran series monitoring equipment maintenance and spare‑parts backup work
• GE transformer monitoring spare‑parts inventory and on‑site power‑equipment maintenance supporting projects