In HV bushing for SF6 switchgear installation oil a critical parameter. Hence the monitoring of this pressure is very important to guarantee a safe operation for the bushing itself and also the performance of connected transformer.
Temperature of oil can be locally very high so the pressure transducer in contact with oil must be specifically designed to resist to such a condition and also be very accurate to convert the signal.
Pressure monitor box is taking the signal from pressure transducer and simply indicate on its LED display the realtime digital value.
In addition a local series of indicating alarms are available to indicate if the pressure inside the bushing is too low (L1) or too high (L2, L3). These information are remoted by changeover dry contacts to control room for maintenance and control.
An autodiagnostic routine continuously check the integrity of electronic board in order to guarantee a safe operation.
Pressure monitor box is not only able to read pressure of oil but of any kind of fluid or gas; its functionality in independent from type of media, the important is to read a 4-20mA analogue signal which is converted and a logic creates alarms.
Device can be customized according to different requests coming from market.
