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On-line Temperature Monitoring System of GaAs Optical Fiber for MSDHG Transformer

Gallium arsenide (GaAs) optical fiber sensing technology is widely used in high voltage, high noise, high temperature, strong corrosion resistance, corrosion resistance, small size, high reliability and other special environment equipment monitoring

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Shangwei Electric

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  • Product Description

  • 1. Product Introduction

    Due to the characteristics and advantages of high voltage resistance, strong anti-interference performance, corrosion resistance, small size and high reliability, gallium arsenide (GaAs) optical fiber sensing technology is widely used in equipment monitoring in many special environments such as high voltage, large noise, high temperature and strong corrosion resistance. It has been widely used in various transformers, reactors and large generator sets with voltage levels of 35kV to lOOOkV, and can directly monitor the hot spot temperature inside the equipment, truly reflect the operation of the equipment. The international ± IEC60076.2 (new edition) standard and the "Technical Guidelines for Intelligent High Voltage Equipment" (Q/GDWZ410 -2010) issued by the State Grid have made relevant provisions on the use of optical fiber temperature measurement for power equipment such as transformers.

    2. product features

    Used to monitor the temperature of the transformer winding can completely resist electromagnetic interference;

    Fully adapt to the thermal environment, chemical environment and mechanical environment of the transformer;

    Improve transformer real-time load optimization and facilitate cooling management;

    The measurement method has nothing to do with the signal intensity, unlike the fluorescence fiber temperature measurement technology, which is affected by the signal intensity;

    The core diameter of the optical fiber is 62.5 μm, which is more flexible than the optical fiber of 200 μm and above;

    In-oil GaAs optical fiber probe has the same service life as the transformer;

    The design of the fiber penetrator that never seeps oil ensures the safe operation of the transformer.

    2. product composition

    1. GaAs optical fiber thermometer

    • In-oil fiber optic probe
    • External extension fiber
    • Penetrator, Penetrator Disk, Penetrator Protective Cover
    • Thermometer protection box

    3. technical parameters

    Number of channels 4 to 16
    Temperature monitoring range -40 ℃ ~ 300 ℃
    Resolution 0.1℃
    Accuracy ± 1 ℃
    Sample Rate 0.5S
    Probe life Same life as transformer
    Working temperature -40~75 ℃
    Communication Interface USB、RS485、RJ45
    Communication Protocol Standard Modbus, optional IEC61850
    Analog quantity Standard 6-way 4 ~ 20mA
    Relay 6 Type C SPDT relays, 5A 250VAC or 30VDC,6 relay status indicators
    Input voltage 24VDC light source life
    Over-voltage protection 3kV
    Power consumption 20W
    Display Color page touch screen
    Data storage 4GB

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