SGM/ABS

Description

High voltage or medium voltage circuit breakers commonly used for distribution and transmission are reliable if they are able to operate in steady and controlled conditions.
The use of SF6 or Dry-Air as quenching gas is extremely important to guarantee a safe operation during the life of equipment.
In order to have continuous check of gas filling and immediate warning in case of leakage the EMD transmitter is suitable to be connected to most standard monitoring systems.
It is ready to operate immediately after installation because of our technology based on ceramic primary element capable of reading the temperature and pressure of gas and calculate density.
All the materials used, such as thick ceramic and stainless steel are insensitive to chemical attach of corrosive and polluted gases.
The case is very robust and it is tested to face heavy duty conditions, so all the inner parts are immersed into resin to guarantee resistance to moisture and vibrations.
The sensor is available with both analog or digital output.
The analog version is a two wires loop powered and the digital is a standard Modbus RTU 485.
Density calculation is based on measurement of two physical data: pressure and temperature; proprietary algorithm is used to convert these data into density and can be customized by changing some coefficients to meet specific request.

Applications

  • Reading of SF6 gas density or Dry-Air or any gas mixture
  • Monitoring of critical parameter of SF6 such as pressure, temperature, density
  • Digital version with RS485 Modbus RTU for smart grid application
  • Predictive signals available for digital version
  • Suitable to work with pure SF6 or mix without any adaptation*
  • Suitable for indoor or outdoor, IP67 protection
  • Industrial, medical or aerospace fields

Highlights

  • Absolute compensated pressure reading
  • High accuracy +/- 1°C FSO over a wide temperature range
  • Ceramic primary element chemically resistant
  • Excellent long term stability
  • Quick response time
  • Factory calibration by laser trimming and automated process
  • 14 bit ASIC core
  • Multiple transmission data output customizable on request