Trafag,8711,8712,8731,8741,8750,8751,SF6氣體密度變送,SF6氣體密度控制器
Trafag,8711,8712,8731,8741,8750,8751,SF6氣體密度變送,SF6氣體密度控制器
產(chǎn)品規(guī)格：
適用于SF6和其它氣體
測(cè)量原理：參考室氣體
測(cè)量范圍：0...1 MPa (0...1000 kPa)
輸出：微動(dòng)開(kāi)關(guān)觸點(diǎn)
較同類(lèi)產(chǎn)
Application
High voltage technology
Main characteristics
Gas Density Controller for SF6 and 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 inbation
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
and 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
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