DOCA0221EN-01

Inspecting the Arc Chute Filters

During a short-circuit, the arc chute extinguishes the arc and absorbs the high level of energy along the entire path of the short-circuit. Arc chutes also help to extinguish arcs under rated current conditions.

Each time an arc is interrupted by an arc chute, the separator plates of the arc chute are eroded. As the condition of the arc chute deteriorates, it is less effective at clearing short-circuits completely. The device can be damaged or destroyed as a result.

Preventive maintenance for the arc chutes consists in regular inspection of the filters, because blocked filters can cause overpressure. The filters can be slightly blackened (due to the gases produced at In).

It is recommended to use a vacuum cleaner instead of a cloth to remove dust from the outside of the arc chutes.

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