High Voltage spring loaded switch. First you have to pump up the handle several times in order to have the charge, afterwards you have to insert a special key to unlock the buttons and then you have press the "ON" button which discharges the spring and closes the circuit. Personally i call it "Jurassic park switch", in the movie they operated a switch like this to power up the fences... The brand is "Schneider Electric" and the switch is a part of a bigger system.
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