Dr Kesorn Pechrach Weaver: Piezoelectrics in Circuit Breakers: How to Measure the Arc Pressure

Dr Kesorn Pechrach Weaver: Piezoelectrics in Circuit Breakers: How to Measure the Arc Pressure: How to Measure the Arc Pressure Two pressure transducers are used to monitor the gas pressure in the arc chamber. The SX series of pie...

How to Measure the Arc Pressure

How to Measure the Arc Pressure

Two pressure transducers are used to
monitor the gas pressure in the arc chamber.
The SX series of piezo resistive pressure
sensor functions as a wheatstone bridge on a
silicon chip with a response times of 0.1 ms.
The pressure transducer gives a voltage output directly proportional to the applied
pressure with sensitivity 0.75 mV/Psi. Long
term stability is 0.1% and repeatability is
0.5% (Maximum difference in output at any
pressure with the operating pressure range
and temperature within O °C to +70 °C).
Resistors are ion implanted into the silicon.
The cavity etched on the reverse to create a
thin silicon diaphragm.

Reference: Piezoelectrics in Circuit Breakers: Design & Test