Gas Density Transmitter for SF6
Type: GDS02

Gas density transmitters are used for monitoring the gas density in high voltage circuit breakers and systems (containing SF6 gas).

  • Pressure range 0...10 bar rel. 0...145 psi rel.
  • Digital or analog output of pressure, temperature, SF6, density and pressure @20°C
  • Three programmable switches (open collector)
  • Built in XEMIX based analysing processor unit
  • Compensation of pressure and temperature
  • Rugged construction IEC 60529: IP 65

Fields of Application

  • Power supply facilities
  • High voltage and gas insulated switchboards (GIS)
  • Medium voltage systems
  • Gas filled converters and generator switches as well as other applications, for indoor and outdoor use. 
Gas Density Transmitter for SF6Gas Density Transmitter for SF6

Gas density transmitters in high voltage systems, in combination with gas density monitors or PC’s as well as customer specified diagnostic systems are used for documentation, trend analysis and data transmission.

Gas density transmitters can also be used for monitoring SF6 emissions caused by high voltage systems.

Compared to electromechanical density monitoring devices, which only feature several deactivation functions in case the SF6-density drops below a certain level, the gas density transmitter allows the online monitoring of the gas density.

This electronic gas density transmitter consists of a piezoresistive pressure sensor and a build in analyzing unit with a XEMIX-processor.

The electronic gas density transmitter GDS 02 has the advantage of featuring additional outputs:

  • RS 485 4…20 mA
  • Three open collector transistor outputs can be programmed and adjusted by PC (level, hysteresis, delay).

 

The function of the switch point can be choosed as downwards / upwards and connector open or closed.

Based on the piezoresistive sensor’s highly accurate, digitally compensated pressure and temperature signals, the accurate gas density is determined by using an optimized formula for polynomial SF6 gas density approximation. The correct density value data will be displayed with a cycle time of 64 ms.

The gas density transmitter can also be used for monitoring the density of other gases.  

Optional:

  • Control module
  • Memory module
  • Remote transmission module

Technical Data Gas Density Transmitter Typ GDS 02

Ranges    
Density according to Beattie-Bridgeman formula   0…67 kg/m³   
Pressure   0…10 bar abs. /   
Temperature   -40…+80 °C   
Overload pressure   20 bar / 290 psi   
Accuracy RS 485    
Total error band pressure   <+/- 0,3% FS   
Total error band temperature   <+/- 1 °C   
Stability rror pressure   <0,1 % FS   
Stability error temperature   <0,3 % FS   
Operation / store and transport conditions    
Operating temperature   -40…+80 °C / -40...176 °F   
Storage Temperature   -50…+85 °C / -58... 185 °F   
Shock resistance test IEC 60068-2-29   100 x 20g / 6ms halve sine wave   
Switch impact test   20g / 5 x 20 ms sine   
Connectors    
Pressure connection   G 1/4“   
Electrical connection    
Connector   Connector M12 x 1 / 8 pins   
Supply voltage   8….30 VDC   
Power consumption   2,6…2,7 mA   
Additional power consumption of every oc output   350…450 μA   
Max Current for open collector output   200 mA   
Reverse voltage protection   yes   
Short circuit proof   yes   
Type of Protection IEC 60947   P 65   
Outputs    
Digital Output   RS485   
(including integrated communication interface)    
Read out cycle   every 64 ms   
Response time (typical)   1...10 ms (2...5 ms)   
Open collector outputs   3 outputs (programmable by PC)  
Analog output   4…20 mA   
Material / Weight    
Housing material   Stainless steel 1.4305   
Weight

 115 g

 

European Union

THIS PRODUCT IS COFINANCED BY THE EUROPEAN FONDS FOR REGIONAL DEVELOPMENT AND FROM RESOURCES OF THE LAND BRANDENBURG

Contact "Fondsverwaltung des Landes Brandenburg EFRE"
Email: efreinfo@mw.brandenburg.de

 

 

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