Description
Product Overview
The GE H201CI-1, also designated HYDRAN 201Ci-1, is a single-channel gas monitoring controller from the GE Vernova HYDRAN 201i transformer condition monitoring portfolio. It works as the operator interface and signal processing unit for one H201Ti intelligent hydrogen transmitter, delivering early warning of incipient faults in oil-filled power transformers.
Housed in a weatherproof enclosure for outdoor deployment, this controller replicates and extends the transmitter’s local functions, including real-time gas concentration display, alarm indication and analog signal output. It also serves as an access point to build a monitoring network of up to 128 H201Ti transmitters via serial communication. Widely used in utility and industrial power systems, it supports predictive maintenance and extends transformer service life.
Core Product Features
- Digital LED display shows dissolved hydrogen concentration from 0 to 1999 ppm for clear at-a-glance status reading.
- Standard non-isolated analog output, jumper-configurable as 0–1 mA, 4–20 mA, 0–1 V or 0–10 V to match SCADA and DCS input requirements.
- Optional second isolated analog output with 1500 V RMS isolation rating for segregated control and monitoring systems.
- Dual gas alarm thresholds (high and high-high) trigger on level, hourly trend and daily trend conditions for layered fault detection.
- Integrated fail alarm monitors power loss, communication interruption and sensor malfunctions, with outputs forced to zero on system fault.
- NEMA 4X rated weatherproof enclosure supports direct outdoor installation on transformer yards and substation sites.
- Single RS-232 communication port enables local configuration and networking of up to 128 transmitters across a site.
- Front-panel alarm buttons and status indicators simplify on-site operation, acknowledgment and diagnostics.
Technical Specifications
| Item | Specification |
|---|---|
| Official Model | H201CI-1 (HYDRAN 201Ci-1) |
| Product Type | Single-Channel Transformer Gas Monitoring Controller |
| Compatible Transmitter | H201Ti Intelligent Hydrogen Transmitter |
| Display Range | 0 – 1999 ppm H₂ equivalent |
| Standard Analog Output | Non-isolated, jumper-selectable: 0–1 mA / 4–20 mA / 0–1 V / 0–10 V; 0–200 ppm default scale |
| Optional Analog Output | Isolated, 1500 V RMS isolation, same signal ranges as standard output |
| Alarm Functions | Gas high, gas high-high, fail alarm (power / communication / sensor fault) |
| Communication | 1× RS-232 serial port; supports network of up to 128 transmitters |
| Power Supply | 24 VDC ±10% |
| Operating Temperature | -40°C to +85°C |
| Enclosure Rating | NEMA 4X weatherproof, heated option available |
| Mounting | Panel mount / wall mount for outdoor substation installation |
| Certifications | CE, UL, IEEE power industry compliance |
Application Fields
- Dissolved hydrogen monitoring and early fault detection for oil-filled power transformers in transmission substations
- Transformer condition monitoring and predictive maintenance for thermal, hydro and renewable power plants
- Distribution transformer fleet monitoring for utility and industrial power distribution networks
- Offshore and industrial substation transformer asset protection and life extension
- Retrofit of existing transformer fleets with continuous online gas monitoring capability
- Critical power infrastructure monitoring for data centers, hospitals and process facilities
Related Model Recommendations
- H201Ci-C: Four-channel HYDRAN 201i controller for multi-transformer monitoring sites, reducing per-unit hardware cost.
- H201Ti: Intelligent hydrogen transmitter installed directly on transformer valves, paired with the H201Ci-1 controller for complete monitoring loops.
- HYDRAN 201R: Base-model single-channel monitor for cost-sensitive transformer fleet deployment.
- HYDRAN M2: Multi-gas DGA monitor for advanced transformer fault diagnosis, complementing hydrogen-only monitoring systems.
