Medium or high voltage switch bushing
A medium or high voltage switch is provided. The medium or high voltage switch includes a bottle assembly and a bushing. The bottle assembly includes a bottle formed of a first material and defining a chamber. The bottle assembly further includes a plurality of contacts for selectively opening and closing an electrical circuit, the plurality of contacts disposed within the chamber. The bushing is formed of a second material and defines a cavity configured to receive the bottle assembly. The bottle assembly and the bushing have an interference fit.
1. A medium or high voltage switch, comprising:
a first terminal;
a bottle assembly comprising:
a bottle defining a chamber;
a plurality of contacts for selectively opening and closing an electrical circuit, the plurality of contacts disposed within the chamber, the plurality of contacts comprising a first contact electrically coupled to the first terminal;
a bushing defining a cavity configured to receive the bottle assembly, the bushing comprising a boss having the first terminal extending at least partially therethrough; and
a compression member compressing the boss against the first terminal to form a seal, the compression member comprising:
a sidewall coupled to the boss; and
an inwardly extending flange coupled to the first terminal.
2. The switch of claim 1 , wherein the bottle assembly comprises a sleeve formed of a third material and overmolded onto the bottle.
3. The switch of claim 2 further comprising a dielectric grease disposed between the bottle assembly and the bushing.
4. The switch of claim 1 , wherein the third material comprises polyurethane.
5. The switch of claim 1 , wherein the second material comprises high-density polyethylene.
6. The switch of claim 1 , wherein the chamber is substantially evacuated.
7. The switch of claim 1 , wherein the bushing comprises:
a head portion defining the first cavity; and
a tank portion defining a second cavity receiving a closing mechanism interconnected with at least one of the plurality of contacts and configured to selectively couple and decouple the at least one of the plurality of contacts with another of the plurality of contacts.
8. The switch of claim 1 , wherein the compression member comprises a ring electrically coupled to the terminal.
9. The switch of claim 8 , wherein the ring comprises the sidewall coupled to the boss and the inwardly extending flange electrically coupled to the terminal.
10. The switch of claim 1 , wherein the compression member compressing the boss against the terminal at least partially retains the bottle within the bushing.
11. The switch of claim 1 , wherein the compression member compressing the boss against the terminal forms a substantially airtight seal.
12. The switch of claim 1 , wherein the compression member is crimped to the boss.
13. The switch of claim 1 wherein, the bushing is a unitary bushing defining the cavity configured to receive the bottle assembly, the bushing comprising:
a head portion defining the first cavity; and
a tank portion defining a second cavity receiving an operating mechanism interconnected with at least one of the plurality of contacts and configured to selectively couple and decouple the at least one of the plurality of contacts with another of the plurality of contacts.
14. The switch of claim 13 , wherein the tank portion defines a first opening for the passage of the operating mechanism therethrough, the first opening defined by an end of the tank portion distal the head portion.
15. The switch of claim 13 , wherein the tank portion defines a first opening for the passage of the opera ting mechanism therethrough; and
further comprising a cover configured to seal the first opening.
16. The switch of claim 15 , wherein the tank portion defines an inner seating surface configured to receive the cover.
17. The switch of claim 13 , wherein the bushing is formed of high-density polyethylene.