Three-phase arc quenching device with two pistons

A three-phase electrical switchgear comprising:

• an arc quenching device having:
• a first busbar, a second busbar and a third busbar, each of a respective phase of the three-phase switchgear;
• a first piston and a second piston, each of an electrically conductive material;
• and
• at least one pyrotechnical actuator arranged with the first and second pistons to axially move each of the first and second pistons when the at least one pyrotechnical actuator is fired;
• wherein the first and second pistons are arranged in relation to the first, second, and third busbars such that axial movement brings the first piston into contact with both the first busbar and the second busbar, short-circuiting the first and second busbars via the first piston, and the second piston into contact with both the first busbar and the third busbar, short-circuiting the first and third busbars via the second piston;
• and
• a fault clearing breaker arranged to break a current of each of the three phases to which the first, second, and third busbars, respectively, are connected.