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Periodic Measurement of Dissolved Hydrogen Content in Transformer Oil

  • Extremely selective to hydrogen due to the use of selective proton conductor
  • No moving parts, no pumps and no extra piping required
  • No field calibration required, long life, and minimal maintenance
  • Excellent Stability due to the strength of ceramics
  • Good accuracy due to a novel measuring algorithm(dynamic temperature scan method)
  • Long life and minimum maintenance due to a novel measuring principle

Benefits

  • Easy to install on a single valve
  • No moving parts, no pumps and no extra piping required
  • No field calibration required, long life, minimal maintenance
  • Resistant against surrounding noise and temperature interference 
  • Ability to integrate additional sensors(CO, C2H2...)
  • Local and remote alarm set at pre-defined levels

Features

  • Extremely selective to hydrogen due to the use of solid electrolyte
  • RS485 output is standard
  • Logging of DATE vis SD card memory up to a year
  • No membrane in touch with oil and No pumps
  • Self diagnostics
  • Solid Electrochemical Principle(Park sensor) is adopted

Specification

General
General DescriptionPeriodic, on-line dissolved H2 monitoring
ComponentsSensor and control panel enclosed in a stainless steel box, Transmitting cable, Terminal
ApplicationDetection of Hydrogen Level in oil-filled HV electrical equipment
Sensor Specification
Sensor Working PrinciplePotentiometric Solid-Electrochemical Sensor with hetero-ionic junction
Components5~10000 ppm oil(0.01%-20%H2 in gas)Detection Limit5 ppm oil(0.01%H2 in gas)
Accuracy

<±10% for low conc.(<2000ppm), <±20% for high conc.(>2000ppm)

System Response Time
(Gas Permeable membrane Passing)

<120min.±10% (* sensor response time: <3 seconds)

System Specification
Size/Weight400x230x110mm/<15KgsPower Supply

220VAC/60Hz±15%, 600VA Max. 120VAC/60Hz

Comm./Network
Std RS-485 port allows for daisy-chaining of multiple transmitters
RS485/232 or RS485/TCP-IP, selectable when ordering
Front Panel

Std RS-485 port allows for daisy-chaining of multiple transmitters RS485/232 or RS485/TCP-IP, selectable when ordering

Host PC SoftwareWindows 2000/XP/2007
Environmental Tests
Outdoor ProtectionIEC60529, IP55
VibrationIEC68-2-6
High & Low Temperature

IEC68-2-1/IEC68-2-2. 60℃ and -40℃

EMC

IEC61000-4-2/4/5/8 Grade 4