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How is it possible to break (slow down) a synchronous generator ones he is not any longer connected to the grid? Why do some power plants have a possibility to break the synchronous generator and other don’t?

For our application (a vacuum tight tank) we need to have a welding connection with a very high gas leaking tightness. What kind of welding technology is suitable for high vacuum tightness? Our requirement is a leaking tightness below 150 * 10-9 mbar * dm3 / s (for air) for a 10 dm3 volume tank...

For our application, a vacuum tight tank, we are looking for a vacuum tight valve. The requested specific leak tightness for the entire tank should be below 158 * 10-9 mbar * dm3 / s (for air). The volume of the tank is approximately 10 dm3. Does anyone have an idea about a suitable valve with...

to thread238-138610 I am currently searching fro a possibility to monitor temperature on circuit breaker conductors (under tension). I would really be interested to get some more information about the possibility to measure the temperature with this fiber optic technology.

It would be possible to measure the temperature with a contact thermocouples or PT100-elements, but how can I transform the output signal to the low voltage level side to be able to connect it to a control cubicle? Imagine, I would have to connect the contact thermocouples with the metallic part...

I would like to detect an over temperature on metallic parts on medium voltage level (around 20 kV AC). In case of over temperature (>100 degrees Celsius), I would like to get a signal that can be used as input for a control system. I found some solutions with infrared measurement technology...