Patent ID: 9117607
Filing Date: 2015-08-25
Classification: H01H,H02B

Abstract:
1. A muffler for enhanced arc protection configured to exhaust arc gas and plasma away from electrical equipment, the muffler comprising: a housing having an inlet, a solid front wall opposite the inlet, and a plurality of side walls that extend between the inlet and the solid front wall and define an interior space of the housing between the inlet and the solid front wall, the inlet being configured to receive arc gas and plasma exiting the electrical equipment to which the muffler is mounted; and internal obstructions within the interior space and dividing the interior space into multiple pathways for changing a direction of travel of the arc gas and plasma entering the inlet, the internal obstructions comprising a first perforated plate and a first baffle plate arranged in any order one behind another relative to the inlet within the interior space so as to oppose the arc gas and plasma received by the inlet, the first perforated plate and the first baffle plate being spaced apart from each other, each of the first perforated plate and the first baffle plate having a major surface which is transverse to the plurality of sidewalls, wherein at least one of the plurality of side walls comprises a vent opening out of which at least some of the arc gas and plasma is exhausted away from the muffler.