Trafag,8781,8782,8783,SF6气体密度继电器带变送器,SF6气体密度继电器,SF6气体密谋变送器

    Trafag,8781,8782,8783,SF6气体密度继电器带变送器,SF6气体密度继电器,SF6气体密度变送器

    主要技术规格

    适用于:SF6和其它气体

    防护等级IP65

    免维护免校准

    应用于高压开关设备

    压力范围:绝对压力0...1.1 MPa(0...1100 kPa)   

    测量压力:0...0.85MPa SF6@ 20°C  0...56.1 kg SF6 /m3
    输出:数字信号或模拟电流,可连续监测,长期无飘移

    适用于户外使用

    Trafag,8781,8782,8783,SF6气体密度继电器带变送器,SF6气体密度继电器,SF6气体密度变送器

    主要特点:

• Most accurate device on the market市场上气体密度设备最准确的产品
• High resistance against vibration and shock高抗振性和防冲击性No bouncing of electrical contacts
• Excellent low and high temperature capability适用于任何低温和高温的场合

    Application
    High voltage technology

   main cHaracteristics

    Gas Density Monitor for SF6 and other gases with output signal for continuous monitoring

    Mechanical monitoring:
?  Principle:                    Reference gas measurement
?  Measuring range absolute:     0...1.1 MPa(0...1100 kPa)
?  Output:                       floating change-over contact
?  Switch point:                 factory calibrated

    Electronic monitoring/Sensor:
?  Principle:                    Oscillating quartz measurement
?  Measuring range absolute:     0...0.85MPa SF6@ 20°C
                                  0...56.1 kg SF6 /m3
?  Output
      analogue:                   current loop
?  Accuracy:                     ±1.0% FS typ.
                                  ±1.8% FS max.
   main features
?  Exact switching following isochore at all temperatures
?  No contact bouncing
?  Independent, galvanically separated circuits
?  Continuous analogue output signal for gas density
?  long term drift free output signal
?  Vibration and shock proof
?  Protection IP65
?  Maintenance-free
?  Suitable for outdoor usage

   Ordering inbation

   Specifications

    Main characteristics

    Mechanical monitoring:
    Principle:                   Reference gas measurement
    Measuring range absolute:    0...1.1 MPa(0...1100 kPa)
    Output:                      floating change-over contact
    Switch point:                factory calibration

    Electronic monitoring:
    Principle:                   Oscillating quartz measurement
    Measuring range absolute:    0...0.85MPa SF6@ 20°C
                                 0...56.1 kg SF6 /m3
    Output analogue:             6.5...20 mA
                                 current loop
    switch point accuracy
    Reference pressure          <650 kPa @ 20°C abs.:
                                ± <10 kPa @ -30...+50°C
    Reference pressure           >650 kPa abs.:
                                ± <12 kPa @ -30...+50°C

   accuracy of indicator
    Mechanical monitoring:
    SF6 Indicator dial
      Accuracy of indicator within numeralised
      range:                    ± 10 kPa @ 20°C
    Low pressure indicator
      Accuracy of indicator within numeralised
      range:
        @ 0 kPa relative:       ± 20 kPa
        >200 kPa relative:      ± 10 %

    accuracy of sensor:
    Accuracy:                   ±1.0% FS typ.
                                ±1.8% FS max.
    Repeatability:              ±0.2% FS
    Response time for installed sensors: τ (63%)
                                         < 20 msec.
    Measured value within ±1.8% FS error band after connecting to:
      SF6-pressurized GIS tank:  96 h
      vacuumized GIS tank:       10 min.

   Microswitch
    Rating:                      see table
    Resistance of insulation:    > 10 MΩ
    Dielectric strenght:         2 kV terminal to ground
    Life time (mechanical)
      Microswitch 20:            1 Mio. cycles
      Microswitch 28:            10 Mio. cycles
    max. difference from the lowest to the highest
      switch point:              130kPa
    Switching differential typ.
      Microswitch 20:            <15 kPa
      Microswitch 28:            <10 kPa
      for indicating range or switching distance
      > 80 kPa:                  <15 kPa

   Electric output signal sensor:
    Output signal                6.5...20 mA
                                 current loop
                                 0...0.85MPa absolute SF6 @ 20°C
                                 0...56.1 kg SF6 /m3
    Earthing:                    via gas connection of sensor
    Supply voltage
      Analog output:             2-wire, 10...32 VDC
    Dielectrical strength:       250V against mass(EN60255-5)
    Resistance of insulation:    > 10 MΩ

    Electrical connection
    Screwed cable gland:         see accessories
    Screw terminal:              plugable, 0.2...2.5 mm2

   environmental conditions
    Ambient temperature:         –40...+80°C
    Media temperature:           –40...+80°C
    Storage temperature:         –40...+80°C
    Protection:                  IP65
    Humidity:                    max. 98% relative
    Vibration:
      @ min. 5 kPa distance from switch point no
      contact bouncing
      under 20...100 Hz:          4 g
    Shock:                        50g/ 8m

    EMC Protection
    ESD:                          15kV air EN/IEC 61000-4-2
    Radiated Immunity:            10V/m, 80...1000Hz EN/ IEC 61000-4-3
    Burst:                        4kV EN/IEC 61000-4-4
    Surge:                        4kV (42 Ω) EN/IEC 61000-4-5
    Conducted Immunity:           10V, EN/IEC 61000-4-6

   Mechanical data
    Material
      Measurement system
        Mech. Sensor:             1.4435,1.4404, 1.4571(AISI316L, AISI316)
        Probe housing:              1.4435, 1.4404, 1.4571 (AISI316L)
        O-Ring (media contacting):  CR
        Filling:                    Gas

      Housing (density monitor): AISi10Mg
    Screwed cable gland:         brass nickel plated
    Weight:                       ~ 1 kg
    Pressure connection:         1.4404 (AISI316L)(see data sheet H72502)

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