Description

GE HYDRAN M2 is an online monitoring device for dissolved gases and moisture in transformer oil under the GE Vernova (formerly GE) brand. It is used for early fault detection of power transformers / reactors.

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I. Core Positioning
Full Name: HYDRAN M2 (Mark III, the third generation)
Usage: Real-time monitoring of fault gases in oil (H₂, CO, C₂H₂, C₂H₄) + moisture, warning of overheating, discharge, and insulation aging
Applicable: Oil-immersed transformers, reactors, transformers (compatible with mineral oil / ester oil)

II. Key Parameters (Mark III)
Measured Gases:
Standard Type: Composite gases (H₂ + CO + C₂H₂ + C₂H₄)
Basic Type: Only hydrogen (H₂)
Measurement Range: H₂: 25–2000 ppm; Moisture: 0–100% RH (oil saturation)
Accuracy: H₂: ±10% reading ±25 ppm; Moisture: ±3% RH
Update Cycle: < 10 minutes
Power Supply: 85–264 VAC, 50/60 Hz; or 24 VDC
Communication: Standard RS485 (Modbus/DNP3); Optional Ethernet (TCP/IP), Fiber Optic
Alarm Output: 2 relays (high gas, system failure)
Operating Temperature: -40°C ~ +65°C; Protection: IP66 (NEMA 4X)
Size / Weight: 150×240×350 mm; 5.6 kg

III. Core Features
No Moving Parts: No pump / additional pipelines required, directly connect to the transformer oil drain valve, maintenance-free.
Built-in Transformer Model: Calculates thermal aging and load capacity according to IEEE/IEC standards, supports predictive maintenance.
Long-Life Sensors: Design life 5 years, on-site replaceable, supports ester oil (natural / synthetic).
Data Recording: Stores 1 year trend / event, supports local LCD and remote monitoring.
Full Self-Diagnosis: Automatic alarm for sensor failure, communication anomaly, power fluctuation.

IV. Model and Series
HYDRAN M2: Standard online monitoring (gas + moisture)
HYDRAN M2-X: New generation, longer sensor life, compatible with APM platform
HYDRAN 201i: Multi-channel DGA, can monitor 5–9 gases (large main transformer)
V. Typical Applications
Power grid high-voltage main transformers, key transformers in industrial and mining facilities, offshore wind power transmission transformers
Replace periodic offline oil chromatography analysis, reduce operation and maintenance costs, avoid unplanned shutdowns