Class   218	HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES
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This Class 218 is considered to be an integral part of Class 200 (see the Class 200 schedule for the position of this Class in schedule hierarchy). This Class retains all pertinent definitions and class lines of Class 200.

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ARC PREVENTING OR EXTINGUISHING DEVICES

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. (1 indent ) Multiple break

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.. (2 indent ) Hybrid-type

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.. (2 indent ) Series connected break

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.. (2 indent ) Simultaneous break

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.. (2 indent ) Sequential break

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.. (2 indent ) Operating mechanism structure or arrangement

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. (1 indent ) Auxiliary shunt

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.. (2 indent ) Polyphase

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.. (2 indent ) Vacuum switch

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.. (2 indent ) Tubular shaped

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.. (2 indent ) Disconnect switch

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.. (2 indent ) Gas type

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.. (2 indent ) Operating mechanism structure or arrangement

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.. (2 indent ) Arc chute assembly

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.. (2 indent ) Contact structure

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... (3 indent ) Movable contact assembly

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.... (4 indent ) Arcing contact

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.... (4 indent ) Movable contact assembly reciprocates

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.... (4 indent ) Movable contact assembly pivots

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....• (5 indent ) Arcing contact pivots relative to movable main contact assembly

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. (1 indent ) Magnetic blowout

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.. (2 indent ) Permanent magnet

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... (3 indent ) Magnetic yoke structure

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... (3 indent ) Located outside switch housing

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... (3 indent ) Located inside switch housing

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... (3 indent ) Connected to contact

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... (3 indent ) Plural coils

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.. (2 indent ) Arc Spinner

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.. (2 indent ) Contact structure

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... (3 indent ) Bridging contacts

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... (3 indent ) Pivot

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... (3 indent ) Reverse looped or flexible stationary contact

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.. (2 indent ) Arc chute

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... (3 indent ) With vent means

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... (3 indent ) Arc runner (e.g., arc horn)

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... (3 indent ) Insulated conductor structure

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.... (4 indent ) Arc splitting means

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.... (4 indent ) Skew, parallel, or vertical position

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.. (2 indent ) Arc runner (e.g., arc horn)

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.. (2 indent ) Barrier

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.. (2 indent ) Within vacuum

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. (1 indent ) Air-current blowout

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.. (2 indent ) Polyphase

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.. (2 indent ) Disconnect switch

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.. (2 indent ) Arcing chamber

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... (3 indent ) Plural chambers

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.. (2 indent ) Contact structure

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... (3 indent ) Fixed

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... (3 indent ) Movable

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.. (2 indent ) With gas flow means

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... (3 indent ) Exhaust port

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.. (2 indent ) With nozzle

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... (3 indent ) With throat region

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.. (2 indent ) Grounding switch

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.. (2 indent ) Self extinguishing

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.. (2 indent ) Puffer piston

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... (3 indent ) Polyphase

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... (3 indent ) With gas blast means

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.... (4 indent ) Piston structure

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.... (4 indent ) Compressing cylinder structure

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....• (5 indent ) With nozzle

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... (3 indent ) With nozzle

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.... (4 indent ) With throat region

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... (3 indent ) Contact structure

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... (3 indent ) Valve (e.g., blast valve or pressure relief valve)

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... (3 indent ) Disconnect switch

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.. (2 indent ) Sealed chamber

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... (3 indent ) Plural switch connected in series

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.... (4 indent ) Hybrid-type

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... (3 indent ) Polyphase

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... (3 indent ) With nozzle

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.... (4 indent ) With throat region

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... (3 indent ) Contact structure

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... (3 indent ) Busbar

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... (3 indent ) Arcing chamber

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... (3 indent ) Shielding

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... (3 indent ) Operating mechanism structure or arrangement

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... (3 indent ) Grounding switch

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... (3 indent ) Disconnect switch

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.. (2 indent ) Arc chute

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.. (2 indent ) Identical units back-to-back

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.. (2 indent ) Recirculating systems

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.. (2 indent ) Operating mechanism structure or arrangement

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.. (2 indent ) Arc extinguishing medium

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.. (2 indent ) Low pressure cut-off valve means

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.. (2 indent ) Magnetic synchronous contacts

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.. (2 indent ) Control of blast valve and contacts

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. (1 indent ) Interposed non-conductor

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.. (2 indent ) Gas-evolving chamber

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.. (2 indent ) Liquid

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... (3 indent ) Operating mechanism structure or arrangement

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.... (4 indent ) Piston

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.... (4 indent ) Delay means (e.g., dashpot)

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.... (4 indent ) Chemical explosive primer

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.... (4 indent ) With oil flow feature

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... (3 indent ) Housing or tank structure

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.... (4 indent ) With raising and lowering means

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.... (4 indent ) With venting means

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... (3 indent ) Disconnect switch

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... (3 indent ) Polyphase

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... (3 indent ) With resistor

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... (3 indent ) Arcing chamber

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.... (4 indent ) Including magnet or coil

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.... (4 indent ) Grid or baffle stack

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.... (4 indent ) With venting means

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... (3 indent ) Contact structure

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.... (4 indent ) Movable

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... (3 indent ) Valve (e.g., spring biased valve plate)

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... (3 indent ) Bridging contacts

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... (3 indent ) Explosion pot

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... (3 indent ) Oil poor breaker

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... (3 indent ) Rotary contact

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... (3 indent ) Pressure generating arc control means

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.... (4 indent ) Plural series connected

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... (3 indent ) Puffer-piston

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.. (2 indent ) Solid

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. (1 indent ) Vacuum

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.. (2 indent ) Polyphase

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... (3 indent ) Operating mechanism structure or arrangement

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.. (2 indent ) Single-pole

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... (3 indent ) Pressure monitoring means

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... (3 indent ) Contact structure

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.... (4 indent ) Movable

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.... (4 indent ) Fixed

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.... (4 indent ) Auxiliary

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.... (4 indent ) Significant shape

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....• (5 indent ) Slotted or grooved

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....• (5 indent ) Coil

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.... (4 indent ) Specific material

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....• (5 indent ) Getter

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....• (5 indent ) Alloy

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....• (5 indent ) Beryllium

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... (3 indent ) Housing structure

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.... (4 indent ) Bellows

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.... (4 indent ) Shielding

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....• (5 indent ) With support

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.... (4 indent ) Potted or encapsulated

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.. (2 indent ) Housing structure

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.. (2 indent ) Operating mechanism structure or arrangement

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.. (2 indent ) With magnetic coil

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... (3 indent ) Located inside housing

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. (1 indent ) Resistance inserting

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.. (2 indent ) With capacitor

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. (1 indent ) With capacitor

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. (1 indent ) Contact structure

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.. (2 indent ) Arc shielding means

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. (1 indent ) Arc runner (e.g., arc horn)

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. (1 indent ) Arc chute assembly

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.. (2 indent ) Material

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.. (2 indent ) Metal plates structure

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. (1 indent ) Polyphase

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.. (2 indent ) Operating mechanism structure or arrangement

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. (1 indent ) Operating mechanism structure or arrangement

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. (1 indent ) Housing structure

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.. (2 indent ) Arcing chamber

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... (3 indent ) With venting means

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... (3 indent ) Arc extinguishing material

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