GE HYDRAN H201Ci‑1 Single‑Channel DGA Monitoring Controller

The GE HYDRAN H201Ci‑1 is a single‑channel remote electronic controller for transformer dissolved‑gas‑in‑oil analysis systems. It pairs with the H201Ti intelligent transmitter to collect real‑time dissolved gas data from oil‑filled power equipment, performing local display, multi‑level alarm logic and signal conversion for substation transformer condition‑monitoring applications. This unit is housed in a weather‑proof NEMA‑4X enclosure suitable for outdoor cabinet‑mount installation in power‑utility sites.

This controller provides opto‑isolated supervisory link, RS‑485 Modbus communication, configurable analog outputs and hardware alarm relay contacts. Front‑panel LED numeric display and latched illuminated alarm push‑buttons enable quick on‑site status inspection. Multiple H201Ci‑1 units can be daisy‑chained to build distributed transformer monitoring networks. Original production has been discontinued. It is widely supplied as aftermarket spare parts for power‑substation monitoring‑system maintenance and legacy DGA retrofit projects.

Main Specifications

1. Brand:GE; Model:HYDRAN H201Ci‑1; Type:Single‑Channel DGA Monitoring Controller Unit
2. Compatible Device:Designed for connection with one HYDRAN H201Ti intelligent dissolved gas transmitter
3. Enclosure Rating:NEMA 4X weather‑proof cabinet for indoor or outdoor installation environment
4. Interfaces:Opto‑isolated supervisory link port, RS‑485 Modbus RTU, configurable 4‑20mA / 0‑10V analog outputs, SPDT alarm relay contacts
5. Local Human‑Machine:0‑1999 ppm LED numeric display, latched Hi / Hi‑Hi illuminated alarm push‑buttons
6. Network Capacity:Supports daisy‑chain networking of up to 32 controllers within one monitoring loop
7. Supply Status:Original production discontinued, available as tested surplus or refurbished spare parts

Core Functions

1. Receive dissolved‑gas‑in‑oil measurement data from H201Ti transmitter via isolated supervisory link, and display real‑time gas‑equivalent concentration values on front‑panel LED screen.
2. Execute programmable multi‑level alarm logic including Hi, Hi‑Hi and equipment fault conditions, driving latched local indicators and hard‑wired SPDT relay contact outputs.
3. Convert gas‑concentration measurement values into industry‑standard analog signals for connection to local DCS, SCADA or chart‑recorder devices inside substation control cabinets.
4. Provide RS‑485 Modbus communication interface for remote data polling, parameter configuration and building multi‑ｄｒｏｐ distributed transformer‑monitoring networks.
5. Store alarm event records and support interaction with HYDRAN HOST software for trend‑data logging, status review and remote transmitter configuration management.
6. Serve as local control and interface hardware for on‑line dissolved gas analysis of power transformers and oil‑filled reactor equipment in power‑generation and substation facilities.

Application Scenarios

1. Power‑plant main transformers, substation power transformers and oil‑filled reactors requiring on‑line dissolved‑gas‑in‑oil condition monitoring.
2. Spare controller replacement and routine maintenance of existing HYDRAN 201 series DGA monitoring systems within power‑utility sites.
3. Technical renovation and condition‑monitoring‑function upgrade of aging legacy transformer predictive‑maintenance systems.
4. On‑site troubleshooting and replacement of faulty monitoring controllers for continuously operating high‑value oil‑filled power equipment.
5. Spare‑parts stocking for system integrators and power‑utility maintenance contractors supporting legacy GE HYDRAN monitoring hardware platforms.
6. Global aftermarket spare supply for technical teams maintaining obsolete GE HYDRAN series transformer dissolved‑gas‑analysis monitoring hardware.

FAQ

1. Q:Can GE HYDRAN H201Ci‑1 work without H201Ti transmitter?
   A:It requires paired H201Ti intelligent transmitter to obtain gas‑measurement data; standalone operation cannot complete full DGA monitoring functions.
2. Q:What symptoms appear upon controller failure?
   A:Blank local display, loss of gas‑measurement readings, no analog output ｕｐｄａｔｅ, Modbus communication ｄｒｏｐ‑out and fault‑relay alarm activation may occur.

3. Q:How to perform configuration and data reading?
   A:Local threshold setting via front‑panel controls; remote parameter setup and historical‑trend access are completed by HYDRAN HOST software over RS‑485 communication link.