The Hydran 201Ti is a small on-line early warning transmitter. It is permanently mounted on the transformer and will provide personnel with a single reading in ppm of a composite value of various fault gases to alert them to a potential issue. This value can be downloaded and alarms can be set at pre-determined levels to alert personnel and enable monitoring of the developing fault condition.
Small and medium sized transformers.
Lower risk and/or consequence of failure.
Ideal for Transmission transformers.
Much better than relying on manual oil sampling.
Real-time single composite fault-gas measurement system.
Local and remote alarms set at pre defined levels or on rate of change.
Remote visibility of the gas reading and trend via serial port communication.
Easy to install on a single valve.
No moving parts, no pumps and no extra piping required.
No field calibration required.
Composite gas sensor which responds 100% to Hydrogen (general fault gas) and is sensitive to Carbon Dioxide (overheated paper).
RS-485 connection as standard.
Modbus or Hydran protocols available.
Vacuum-resistant gas extraction membrane.
Full system self test and self-diagnostics.
Local logging of data and significant events for up to a year.
MEASUREMENTS: Fuel cell type sensor behind a gas permeable membrane in contact with transformer insulating oil
Range: 25-2000 ppm (volume/volume, H₂ equivalent)
Accuracy: ±10% of reading ±25 ppm (H₂ equivalent)
Response time: 10 minutes (90% of step change)
"Composite Gas" Sensor:
H₂: 100% of concentration
CO: 15 ± 4 % of concentration
C₂H₂: 8 ± 2 % of concentration
C₂H₄: 1.5 ± 0.5 % of concentration
Repeatability highest of ±5% of reading or ±5 ppm
"H2 Only" Gas Sensor:
Relative sensitivity H₂: 100% of concentration Interference from CO, C₂H₂ and C₂H₄ less than 3% of concentration
Repeatability highest of ±5% of reading or ±10ppm
Display: Backlit LCD, 2 lines x 16 characters; Keypad to setup unit and acknowledge alarms
USB port (type B connector) for local connection to laptop computer for configuring the system
RS-485 (terminal block), isolated to 2000 Vac RMS, for supervisory link connection to optional controllers and for remote communication
Gas level (ppm) and gas rate of change (hourly or daily ppm) outputs using Modbus® or Hydran Protocols over RS-485
3 different alarms: Gas Alert (Hi), Gas Alarm (HiHi) and Service Alarm (battery, sensor, temp)
Gas alarms can be set on gas level reached or on hourly or daily trend (gas level rate of change)