Search results for query: *

Hi, We have a requirement to perform 20g 100ms half-sine shocks on a new product we are developing. The shock requirement comes I believe from a helicopter specification. We have scoured our usual environmental test facilities but the duration is too long for them due to the high displacement...

The part in question, does use dual SCR's. If the problem is solely dV/dt then the rates I can measure using a scope of approx 1V/us is way down on the manufacturers spec sheets of 1000V/us. I wonder if the 1000V figure is under ideal conditions at say 50Hz and unity power factor and maybe at...

These SSR's are just for on/off control. They do not fail, they just "fail" to turn off when commanded to do so. The problem appears worse when the fans have just started to spin up. If you get them up to full speed then turn off they generally do. I finally found another vendor with the same...

I will try the capacitor idea out. The relays are Clare PS2401 devices which are specc'd to 500Hz, doesn't mention at what power factor though. Data sheets talks about minimum power factor for guaranteed turn on but turning on is not the problem !

I have a problem with an SSR when driving a three phase fan at 115V, 400Hz, max 440Hz. The powerfactor is not very high typically 0.3 . The problem is that occasionally two of the three SSR's feeding the fan do not switch off when commanded to do so via the inbuilt opto. The problem is worse as...

Can anyone recommend a potting compound for an electronic circuit card that could withstand JP10 fuel vapour for 30 days without significant swelling or degradation ? Thanks Nick Stilwell