Abstract: A protective door having push switches, access to racking unit and viewing windows is assembled with the electrical device such that the protective door encloses the electrical device with a flame proof sealing. The push switches and cutout to access racking unit are made aligned with the electrical device such that the switches of the electrical device are actuated through the push switches, racking in and out the device is possible through the cutout to access racking unit and it allows reading the rating plate, display of the electrical device through the viewing windows in the protective door even if the protective door is closed. The push switch has a push rod and a spring loaded push button assembled inside a cylinder and the push button is clamped from the front of the protective door. The push switches are arranged such that a reset switch contact with the position reset switch of the electrical device, push switches to respectively switch ON and Switch OFF the electrical device.

Abstract: A muffler for enhanced arc protection is described. In the case of an internal arc event in an electrical enclosure, the muffler exhausts arc gas and plasma parallel to the enclosure surface, instead of directly forward where persons may be located. The muffler includes perforated plates and baffle plates in its interior space. The perforated plates have offset perforation patterns from one another, and the baffle plates are provided on opposing walls, causing the plasma and gas to make multiple directional changes. The perforated plates also filter the arc gas and plasma. These directional changes and filtering result in an energy reduction from the exhaust, which provides an increased margin of safety. In addition, the muffler provides an adequate level of ventilation in the enclosure, thus keeping the components cool.

Abstract: A muffler for enhanced arc protection is described. In the case of an internal arc event in an electrical enclosure, the muffler exhausts arc gas and plasma parallel to the enclosure surface, instead of directly forward where persons may be located. The muffler includes perforated plates and baffle plates in its interior space. The perforated plates have offset perforation patterns from one another, and the baffle plates are provided on opposing walls, causing the plasma and gas to make multiple directional changes. The perforated plates also filter the arc gas and plasma. These directional changes and filtering result in an energy reduction from the exhaust, which provides an increased margin of safety. In addition, the muffler provides an adequate level of ventilation in the enclosure, thus keeping the components cool.

Abstract: A protective door having push switches, access to racking unit and viewing windows is assembled with the electrical device such that the protective door encloses the electrical device with a flame proof sealing. The push switches and cutout to access racking unit are made aligned with the electrical device such that the switches of the electrical device are actuated through the push switches, racking in and out the device is possible through the cutout to access racking unit and it allows reading the rating plate, display of the electrical device through the viewing windows in the protective door even if the protective door is closed. The push switch has a push rod and a spring loaded push button assembled inside a cylinder and the push button is clamped from the front of the protective door. The push switches are arranged such that a reset switch contact with the position reset switch of the electrical device, push switches to respectively switch ON and Switch OFF the electrical device.