Gas Density Transmitter GDS
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Gas Density and Pressure MonitoringGas 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 0,5...11 bar abs. 7,25...159,5 psi abs. ■ Digital or analog output of pressure, temperature, SF6, density and pressure @20°C analyzing unit ■ Compensation of pressure and temperature ■ Rugged construction 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 transmitters in high voltage systems, in combination with gas density monitors for PCs 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 micro processor. The electronic gas density transmitter GDS 02 has an RS485 output. 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 Comde-Derenda GmbH Kieler Strasse 9, 14532 Stahnsdorf / Germany info@comde-derenda.de www.comde-derenda.de

Gas Density and Pressure Monitoring Technical Data Gas Density Transmitter Type GDS 02 Ranges Density according to Beattie-Bridgeman formula Pressure Temperature Overload pressure Accuracy RS 485 Total error band pressure Total error band temperature Stability error pressure Stability error temperature Operation / store and transport conditions Operating temperature Storage Temperature Shock resistance test IEC 60068-2-29 Switch impact test Connectors Pressure connection Electrical connection Connector Supply voltage Power consumption Additional power consumption of every oc output Max...