• Principle: Reference gas measurement參考?xì)馐覝y量原理
• For arctic temperatures, -76 to 176°F可用于北極溫度-76 to 176°F（-60-80度）
• Exact switching following isochore精確的微動開關(guān)
• Excellent vibration resistance*的抗振性
• No false alarms at low temperatures極低溫下不存在任何誤報警
• Stainless steel or aluminum sensor不銹鋼或鋁傳感器
• Galvanically separated circuits分立電路
• Switch point adjustment in factory工廠設(shè)定
• High/Medium Voltage應(yīng)用于GIS系統(tǒng)高中壓范圍
•  
• Trafag,8718,8728,8738,8748,氣體密度繼電器,極低溫SF6氣體密度控制器

• 北極溫度SF6氣體密度繼電器,SF6氣體密度控制器

    Application
    High voltage technology

   Main characteristics

    Gas Density Monitor for SF6 and other gases
?  Principle:                     Reference gas measurement
?  Measuring range:               0...1.1 MPa （0...1100 kPa）
?  Output:                        floating change-over contact
?  Switch point:                  factory calibrated

   Main features
?  For arctic temperatures:  –60...+80°C
?  Switching signal in case of liquefaction of gas
?  Exact switching following isochore
?  Excellent vibration resistance
?  No false alarms at low temperatures
?  Stainless steel sensor
?  Independent, galvanically separated circuits

   Ordering information

    Specifications

    Main characteristics

    Principle:                    Reference gas measurement
    Measuring range absolut:      0...1.1 MPa（0...1100 kPa）
    Output:                       floating change-over contact
    Switch point:                 adjustment in factory

   accuracy （@ 20°C）
    Reference pressure <650 kPa abs.: ± <10 kPa
                                  @ -30...+50°C
    Reference pressure >650 kPa abs.: ± <12 kPa
                                  @ -30...+50°C

   accuracy of indicator
    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 %

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

   Electrical connection
    Screwed cable gland:          see accessories
    Terminal screw:               plugable, 0.2...2.5 mm2

   Environmental conditions
    Ambient temperatur:           –60...+80°C
    Media temperature             –60...+80°C
    Protection:                   IP65
    Humidity:                     max. 95% relative
    Vibration
      Min. Difference from switch point: 5 kPa
      20...80 Hz:                  4 g

    Choc:                          50g/ 11ms

咨詢訂購Trafag,8718,8728,8738,氣體密度繼電器,極低溫SF6氣體密度控制器

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