MV Sw Gr - Wiping Contact/Momentary contact
MV Sw Gr - Wiping Contact/Momentary contact
(OP)
Client's specification calls for two (2nos) Wiping Contacts as part of the Auxiliary Switch Contacts of a 11kV Sw Gr Breaker. It also calls for "slow closing device". Can some one help me with what purpose do these serve?
thanks in anticipation!
thanks in anticipation!






RE: MV Sw Gr - Wiping Contact/Momentary contact
A slow close device is a maintenance tool, usually a lever that allows the switch to be closed manually in slow motion so the contact sequencing and operation can be observed.
RE: MV Sw Gr - Wiping Contact/Momentary contact
Wiping action contacts can include some limitations on current, voltage, and lifecycle, and they require some form of lubricant, such as grease, to facilitate movement. With repeated arcing, the level of contaminants can increase and be captured by the lubricant around the contact area. This could eventually affect the operation of the switch.
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