SDM SF6 Condition Monitoring System

      Because of the pressure equipment with GIS of SF6 gas as insulation, arcing medium, so monitoring equipment SF6 gas pressure of GIS and the moisture is monitoring the GIS equipment, the running state of must means. The existing GIS equipment widely used in equipment locally density relay surveillance, rely on the density relay SF6 pressure on the contact pressure to a distant SF6 low pressure alarm, low pressure atresia signal. With no online monitoring system, unable to find SF6 gas leakage and its development trend, prone to severe leakage, endanger SF6 because the equipment safety, causing damage to the equipment and influence the stability of the system operation of the accident.

      SDM is built-in microprocessor SF6 gas pressure and the moisture, can monitor continuous online monitoring SF6 circuit breaker and gas insulated enclosed combination appliances (GIS) SF6 gas pressure (density), the moisture and the parameters such as temperature. SDM device can in the harsh environment, accurate measurement of pressure, the parameters such as moisture and could not be the influence of the electromagnetic interference. Measurement data from the field monitoring unit, and through the field storage communications bus uploaded to the background to realize the remote computer monitoring and management. The computer has the dynamic database with data storage and historical data retrieval etc. The software also provide on-line modification lower limit alarm value, print report, animation display, operation shows, group display, trend chart shows, and other functions.

      SDM is suitable for all kinds of voltage level SF6 circuit breaker and GIS equipment SF6 gas pressure, the temperature of the moisture and on-line monitoring.



      • In extreme temperature environment also can ensure accurate measurement
      • By microprocessor control
      • Sensors from electromagnetic interference

      • Can store up to nine years data
      • Precise gas density readings
      • Instead of the conventional mechanical density meter is designed