Arc flash mitigation switch for quenching external arc faults in low voltage switchgear
Systems, methods, and devices, for forming and using an arc flash mitigation switch are provided. In one exemplary embodiment, an arc flash mitigation switch includes a cylindrical shell having a first end cap and a second end cap located at either end of the cylindrical shell. A first and second conductive feed through extend through the first and second end cap, respectively, at one end, and at the other connect to a first and second electrode separated by a gap. The exemplary arc flash mitigation switch further includes a trigger feed through that receives a trigger current that commutates the external arc flash event into the arc flash mitigation switch, quenching the external hazard.
1. A system for mitigating arc flashes, the system comprising:
a first low voltage power bus bar, a second low voltage power bus bar, and a third low voltage power bus bar each being substantially parallel to one another and separated by a first distance from one another;
at least a first and a second support bar substantially parallel to one another and separated by a second distance from one another, the at least first and second support bar being perpendicular to the first, second, and third low voltage power bus bars; and
at least two arc flash mitigation switches, wherein:
a first end of a first arc flash mitigation switch is electrically coupled to the first low voltage power bus bar;
a first end of a second arc flash mitigation switch is electrically coupled to the third low voltage power bus bar; and
a second end of the first arc flash mitigation switch and a second end of the second arc flash mitigation switch are both electrically coupled to the second low voltage power bus bar.
2. The system of claim 1 , wherein the at least two arc flash mitigation switches are horizontally oriented such that:
the first end of the first arc flash mitigation switch is located proximate the first low voltage power bus bar and the second end of the first arc flash mitigation switch is located proximate to the second low voltage power bus bar; and
the first end of the second arc flash mitigation switch is located proximate to the third low voltage power bus bar and the second end of the second arc flash mitigation switch is located proximate to the second low voltage power bus bar.
3. The system of claim 2 , wherein the second end of the first arc flash mitigation switch and the second end of the second arc flash mitigation switch share a common electrical connection to the second low voltage power bus bar.
4. The system of claim 1 , wherein the at least two arc flash mitigation switches are vertically oriented such that:
the second end of the first arc flash mitigation switch resides on a first portion of the first low voltage power bus bar between the at least first and second support bar; and
the second end of the second arc flash mitigation switch resides on a second portion the third low voltage power bus bar between the at least first and second support bar.
5. The system of claim 4 , further comprising:
a cross bar comprising a first end and a second end and a middle, wherein:
the first end of the first arc flash mitigation switch is coupled to the first end of the cross bar;
the second end of the second arc flash mitigation switch is coupled to the second end of the cross bar; and
the middle of the cross bar is electrically coupled to a portion of the second low voltage power bus bar between the at least first and second support bar.