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接口尺寸: | 螺纹(mm) | **: | 是 |
*护等级: | IP67 | 测量范围: | 0-1.1(kPa) |
类型: | Trafag,8781,8782,8783,SF6气体密度继电器带变送器,SF6气体密度 | *爆等级: | IP67 |
型号: | Trafag,8781,8782,8783,SF6气体密度继电器带变送器,SF6气体密度 | 测量介质: | SF6气体和其它气体 |
精度等级: | 1.0 | 品牌: | Trafag/瑞士 |
输出信号: | 4-20(mA) | 电源电压: | 4(V) |
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
*护等级IP65
免维护免校准
应用于高压开关设备
压力范围:*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:
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
*ogue: current loop
? Accuracy: ±1.0% FS t*.
±1.8% FS max.
main features
? Exact switching following isochore at all temperatures
? No contact bouncing
? Independent, galvanically separated circuits
? Continuous *ogue output signal for gas density
? long term drift free output signal
? Vibration and shock proof
? Protection IP65
? Maintenance-free
? Suitable for outdoor usage
Ordering information
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 *ogue: 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 t*.
±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 t*.
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 m*(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
*D: 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: br* nickel plated
Weight: ~ 1 kg
Pressure connection: 1.4404 (AISI316L)(see data sheet H72502)
Electrical data switch
Output Signal *ogue
Protection
Dimensions
Dimensions
8781
Trafag