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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
Trafag8718,8728,8738,8748,SF6氣體密度繼電器基本參數
壓力范圍:0...1 MPa （0...1000 kPa）
使用zui低溫度:-60ºC （-65ºC）
適用氣體：SF6和其它氣體
精度等級：
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,氣體密度繼電器,極低溫SF6氣體密度控制器產品特點
- Principle: Reference gas measurement參考氣室測量原理
- 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
- 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工廠設定
- High/Medium Voltage應用于GIS系統高中壓范圍
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- Trafag,8718,8728,8738,8748,氣體密度繼電器,極低溫SF6氣體密度控制器
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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
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
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
: 56291930
：sales@zoriver.cn
http://www.zoriver.cn http://www.zoriver.com.cn
