Description
Technical Specifications
| Parameter | Value |
| Manufacturer | GE Vernova (Grid Solutions) |
| Product Model | Hydran M2-X |
| Product Type | Online Composite Gas & Moisture Transformer Monitor |
| Primary Gas Measured | Composite gas sensor tracking Hydrogen (H_2), Carbon Monoxide (CO), Acetylene (C_2H_2), and Ethylene (C_2H_4); Hydrogen-only option available |
| Measurement Range | 25 to 2,000 ppm (H_2 equivalent volume/volume) |
| Accuracy | \pm 10\% of reading \pm 25 ppm |
| Response Time | 10 minutes |
| Moisture Measurement | Thin-film capacitive sensor immersed directly in oil; Range: 0 to 100% RH; Accuracy: \pm 2\% RH |
| Oil Compatibility | Standard mineral insulating oils, natural ester, and synthetic ester based fluids |
| Enclosure & Rating | Anodized aluminum enclosure; NEMA Type 4X certified, meets IP56 requirements |
| Power Supply | 90 to 132 V AC or 180 to 264 V AC switch-mode universal power supply, 47 to 63 Hz, 650 VA max |
| Communication Protocols | Standard: Modbus, DNP 3.0 over RS-485 or Ethernet; Optional: IEC 61850 over TCP/IP, cellular/wireless modems |
| Operating Temperature | -40 to +55°C (-40 to +131°F) ambient environment; Oil temperature at valve: -40 to +105°C (with optional finned heat sink adapter) |
| Process Connection | 1.5” NPT male thread, mounts directly onto a standard 1.5” gate or globe valve |
| Dimensions & Weight | 315 x 219 x 196 mm (12.4 x 8.63 x 7.72 in); Installed Weight: ~7.5 kg (16.5 lb) |
| Condition | New Original / Factory Sealed |
| Availability & Lead Time | Stock dependent; typical manufacturing and dispatch windows range from 2 to 4 weeks |
| Warranty | 7-year product warranty |
| Indicative Price | Price subject to market conditions; contact us for a firm quote |
Functional Overview
The GE Vernova Hydran M2-X is an advanced, compact online monitoring system engineered to continuously track dissolved fault gases and moisture levels in electrical power transformers. Building on decades of field-proven Hydran technology, the M2-X uses a fuel-cell type diffusion sensor behind a permeable membrane to detect hydrogen and related fault gases generated by thermal and electrical stress inside the insulation medium.
Continuous tracking of moisture alongside composite gas signatures allows operators to spot early-stage anomalies—such as partial discharge, local overheating, or arcing—before they escalate into catastrophic failures. The unit features an integrated local display, keypad, and robust data logging capabilities, fitting seamlessly into broader Asset Performance Management (APM) and SCADA architectures.
Integration and Deployment Considerations
Direct Valve Mounting
The Hydran M2-X screws directly onto a 1.5” drain or filter valve using a 1.5” NPT male connection. This eliminates the need for complex external plumbing loops or extra mounting brackets in most standard utility and industrial transformer layouts.
Expandable Analog Card Slots
The base unit supports plug-in option cards for extra 4–20 mA analog inputs and outputs, as well as digital dual-input channels. These slots enable connection of auxiliary sensors—such as top-oil temperature probes, split-core load current transformers (CTs), and ambient temperature monitors—allowing the internal software to execute IEEE-compliant math models for winding hot-spot calculations.
Networking and Remote Asset Management
For plant-wide SCADA integration, the system utilizes built-in RS-485 serial architecture or optional copper/fiber optic Ethernet (TCP/IP) modules. Collected diagnostic datasets integrate natively with GE Perception software and modern substation historians.
Frequently Asked Questions
Q: What is the primary difference between a composite gas sensor and a hydrogen-only sensor on the M2-X?
A: The standard composite gas sensor (S_0) responds primarily to hydrogen (H_2), but exhibits controlled relative sensitivities to carbon monoxide (CO), acetylene (C_2H_2), and ethylene (C_2H_4), covering multiple root failure modes. The hydrogen-only sensor (S_1) targets pure H_2 tracking exclusively in mineral oil applications.
Q: Can the Hydran M2-X be installed on a live, energized transformer?
A: Yes, provided the transformer features a compatible isolated 1.5” maintenance valve with adequate clearance and strict hot-tap safety protocols are enforced by local site procedures during mechanical seating.
Q: How is manual oil sampling performed while the monitor is attached?
A: The enclosure incorporates an external extraction port equipped with a Luer-type stopcock valve, allowing maintenance personnel to pull syringe oil samples for lab-based reference DGA verification without dismounting the unit.
