ingram010 Posted May 4, 2007 Report Share Posted May 4, 2007 I work in the R&D department for an electrolytic capacitor company. I have been asked to develop a completely automated data logging system using an Agilent aquasition unit. I have to measure 8 high voltage capacitors simultaneously, these capacitors will be measured for internal pressure via a pressure transducer, internal temperature vie a thermocouple and leakage current, they will be kept in an oven a 95 degrees for the duration of the test. The capacitors are supplied 500vdc using a GENH750w power supply, they will be under test conditions for weeks even months. The capacitors may reach 70psi at different rates therefore I need to turn off the supply to those particular capacitors individually. So, I have 8 outputs from a labjack U3 that go high when then the capacitors reach 70 psi, the labjack is powered by a USB. The idea in my head is to use the output to some how switch a Transistor,MOSFET,N Channel,SPP02N60S5 to turn on and off the supply to each individual capacitor, possibly using an opt isolator. I am thinking that I need to lower the 500vdc to something that can safely supply the gate of the mosfet.Please, please can someone offer some suggestions?Thanks John Quote Link to comment Share on other sites More sharing options...
AN920 Posted May 4, 2007 Report Share Posted May 4, 2007 I have used this before in HV measuring applicationshttp://news.thomasnet.com/fullstory/14235/612 Quote Link to comment Share on other sites More sharing options...
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