供应Trafag,8718,8728-Trafag,8718,8728,8738,气体密度继电器,极低温SF6气体密度控制器,-智能制造网

产品详情

Trafag,8718,8728,8738,8748,气体密度继电器,极低温SF6气体密度控制器

北极温度SF6气体密度继电器,SF6气体密度控制器

Trafag8718,8728,8738,8748,SF6气体密度继电器基本参数

压力范围:0...1 MPa （0...1000 kPa）

使用zui低温度:-60ºC （-65ºC）

适用气体：SF6和其它气体

精度等级：

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

Trafag,8718,8728,8738,8748,气体密度继电器,极低温SF6气体密度控制器产品特点

Principle: Reference gas measurement参考气室测量原理
For arctic temperatures, -76 to 176°F可用于北极温度-76 to 176°F（-60-80度）
Exact switching following isochore精确的微动开关
Excellent vibration resistance优越的抗振性
No false alarms at low temperatures极低温下不存在任何误报警
Stainless steel or aluminum sensor不锈钢或铝传感器
Galvanically separated circuits分立电路
Switch point adjustment in factory工厂设定
High/Medium Voltage应用于GIS系统高中压范围
Trafag,8718,8728,8738,8748,气体密度继电器,极低温SF6气体密度控制器
北极温度SF6气体密度继电器,SF6气体密度控制器

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

   Mechanical daTA
    Material
      Measurement system:
        Sensor:                  1.4435,1.4404, 1.4401（AISI316L, AISI316）
        Sensor housing, options: 1.4435, 1.4404（AISI 316L）
       Filling:                  Gas
      Housing （density monitor）: AIS i10Mg
    Screwed cable gland: brass nickel plated
    Weight:                      ~ 800...1000 g
    pressure connection:         1.4404 （AISI 316L）（see data sheet H72502）

Electrical data switch

Protection

Dimensions

    Dimensions

    verschiedene Gas-Druckanschlüsse siehe:
    différents raccords de pression pour gaz voir:
    different gas pressure connections see:
    Data sheet No: H72502