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Trafag,8711,8712,8731,8741,8750,8751,SF6���w�ܶ�׃��,SF6���w�ܶȿ�����

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   Application    High voltage technology

    Main characteristics

   Gas Density Controller for SF6 ��nd other gases    Principle:       Reference gas measurement    Measuring range: 0...1 MPa ��0...1000 kPa��    Output:          floating change-over contact    Switch point:    adjustment in factory

   Main features

    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:       R eference gas measurement    Measuring range: 0...1 MPa ��0...1000 kPa��    Output:          floating change-over contact    Switch point:    adjustment in factory

    Accuracy ��@ 20°C��    Switching differential typ.      Microswitch 20: <15 kPa      Microswitch 28/83: <10 kPa    Accuracy of the reference Miroswitch from the reference isochore ��see page 4��      -30...+50°C: <10 kPa��Filling pressure: <650 kPa��      -30...+50°C: <12 kPa��Filling pressure: <1 MPa��

    Microswitch    Rating:                   see table    Resistance of insulation: > 2 MΩ    Dielectric strength:      2 kV terminal ground    Life time ��mechanical��      Microswitch 20:         1 Mio. cycles      Microswitch 28/83:      10 Mio. cycles    Max. difference from the lowest to the highest      switching point:        130kPa

   Electrical connection    Male electrical plug:     DIN 43650-A    Female electrical connector      Cable-Ø:                6...13 mm      Terminal screw:         0.5...1.5 mm2

   Environmental conditions    Ambient temperatur:       -40....+80°C    Media temperature         -40....+80°C    Protection:      8711/50/51:             IP54      8712/21/31/41:          IP00    Humidity:                 max. 95 % relative    Vibration      Min. Difference from switch point: 5 kPa      20...80 Hz:             4 g    Shock:                    50g/ 11ms

    Security    Leakage of Reference chamber: < 0.5 kPa/ year                                  ��5·10-10 kPa·I·s-1��    Service:                      none,switch point checking after 5 years    Reference chamber leakage tests: With Helium gas in vacuum process                                  ��nd integral leakage test in overpressure process

   Mechanical data    Material      Sensor:         Housing:                 1.4435 ��AISI316L��         Filling:                 Gas      Housing:                    AlMgSi1, anodized      Male electrical plug:       PA, Polyamid    Weight:                       ~ 350 g ��8711��

   Electrical data switch

   Electrical connection

    Dimensions

    Accessories