GE HYDRAN 201Ci-1 Controller

GE Energy HYDRAN 201Ci-1 Single Channel Controller - Intelligent Core for Gas Monitoring in Transformer Oil

In the power system, latent faults in oil immersed transformers, such as partial discharge, overheating, or arcing, can generate fault gases such as hydrogen (H ₂), carbon monoxide (CO), acetylene (C ₂ H ₂) in the insulating oil. Timely and accurate monitoring of these gas concentration changes is the key to preventing catastrophic accidents. GE Energy's HYDRAN ®  The 201i series is precisely the online dissolved gas analysis (DGA) solution designed for this purpose. Among them, the HYDRAN 201Ci-1 single channel controller serves as the "central nervous system" of the system, working in conjunction with the H201Ti intelligent transmitter to provide professional, reliable, and scalable monitoring capabilities for a single transformer.

Positioning and System Composition

HYDRAN 201Ci-1 is a remote electronic controller designed specifically for connecting an H201Ti smart transmitter. The standard configuration after combining the two is often referred to as HYDRAN 201R Model i. The transmitter is directly installed on the transformer valve, continuously samples the gas in the oil through a selective permeation membrane and a combustible gas detector, and transmits the data to the 201Ci-1 controller. The controller is responsible for local display, alarm output, and communication networking, forming a complete single transformer monitoring unit.

Core functions and technological advantages

1. Clear local display and operation

The controller panel is equipped with a digital LED display screen (red/green diodes) with a concentration of 0-1999 ppm, which displays the current gas concentration in real time (calculated as hydrogen equivalent). Users can quickly read values without the need for additional tools. There is also a luminous alarm button (Hi and Hi Hi) on the door panel. When the gas concentration or trend exceeds the set value, the button will lock and light up until manually reset, ensuring that on-site personnel are informed of the abnormality as soon as possible.

2. Comprehensive alarm and analog output

Gas alarm: Reproduce the three types of alarms in H201Ti - absolute concentration alarm, hourly gas trend alarm, and daily gas trend alarm. Each alarm provides SPDT C-type dry contacts (125 VA @ 250 Vac/60 W @ 220 Vdc), which can be directly connected to the central alarm panel of the substation.

Fault alarm: When a power failure, communication interruption, sensor failure, or system self-test error occurs, the fault relay will activate, the display screen will turn off, and the analog output will return to zero, achieving fail safe logic.

Standard Analog Output: Non isolated, jumper can be configured as 0-1 mA/4-20 mA (10 V maximum) or 0-1 V/0-10 V, corresponding to a range of 0-2000 ppm, making it easy to connect to PLC or DCS.

Optional second isolated analog output: specified when ordering, isolation voltage of 1500 V RMS, also supports multiple signal types, meets redundancy or dual acquisition requirements.

3. Powerful communication and networking capabilities

Monitoring link port: Optical isolation (3000 V) dedicated port connected to H201Ti, with a maximum length of 1300 meters, requiring the use of three pairs of shielded twisted pair cables (AWG # 16/# 18). This link not only transmits gas data, but also provides power and instructions for the transmitter.

RS-485 port: allows up to 32 H201Ci-1 (or mixed with H201Ci-4/H201Ci-C) to be networked in a daisy chain manner, with a total extension distance of up to 1300 meters. By connecting to a computer through an RS-232 local port (DB-9) or accessing remotely through an optional modem, up to 128 H201Ti transmitters can be managed within the entire network.

Software support: in conjunction with HYDRAN ®  HOST software (based on Windows) can perform real-time alarm polling, historical data upload (including trend graphics), configuration download, and even remotely upgrade transmitter firmware. The data is automatically stored in a Microsoft Access database and can be exported to ASCII files for spreadsheet analysis.

All communication cables are recommended to be laid in metal conduits to minimize electromagnetic interference (EMI) and radio frequency interference (RFI). The controller itself meets the IEEE C37.90 and IEC 255-4, 801-2, and 801-4 standards, and is suitable for harsh electromagnetic environments.

Durable and reliable environmental adaptability

Shell: NEMA 4X/IP 66 steel chassis, white baked enamel surface, dustproof, waterproof, corrosion-resistant, can be directly installed outdoors.

Temperature range: Equipped with a standard heater, supporting ambient temperatures from -50 ℃ to+55 ℃ (-58 ° F to+131 ° F), suitable for cold or high temperature areas.

Power supply: 100/115/200/230 Vac ± 10%, 50/60 Hz, maximum power consumption less than 120 VA, and in compliance with EN 61010 safety standards.

Anti vibration installation: It can be installed with vibration absorbing rubber pads (optional accessories) to reduce the impact of mechanical vibration on electronic devices.

Size and weight: approximately 250 × 350 × 200 mm, with a weight of 10 kg after installation and 11 kg during transportation.

Engineering Application and Selection Suggestions

HYDRAN 201Ci-1 is most suitable for scenarios that require independent and cost-effective monitoring of a single critical transformer, such as:

Main transformer of power plant

Large industrial rectifier or furnace transformer

Upgrading and retrofitting of old transformers in power grid hub substations (replacing the original H201R system)

If 2-4 transformers need to be centrally monitored on site, H201Ci-4 four channel controller can be selected; If only communication aggregation is required without local display and alarm, H201Ci-C communication controller can be selected. All models can be connected through RS-485 hybrid, with extremely flexible expansion.

Original factory accessories and calibration

GE Energy also provides necessary accessories for the system:

H200i electronic calibrator: used for on-site verification and calibration of H201Ti electronic units, it is recommended to equip at least one at each site.

H201-TW tubular wrench: used for correctly installing sensors to avoid leakage or damage.

Vibration absorbing rubber pad: set of four, used for installing controller chassis.