So we have a circuit that consist of simply 5 botd devices (break on temperature drop) "Freeze Stats". The unique thing about this circuit is that there is a reset in the control panel so the voltage runs through the freeze stats and when on trips.... the relay opens the entire circuit. So we have an uninterpretable power supply and when we lose power the UPS take approx. 30 milliseconds to kick power to all the devices on it. During this time the relay loses power and it acts as if a freeze stat has tripped. The job was speced for this "one button reset".
Does anyone have an idea how to keep power to the relay for 30-100 milliseconds while power from the ups is kicking in?
We have already tried a small 63 volt dc non polarized capacitor. This does not work.
Any ideas would be greatly appreciated!!!