Vacuum break switch
View Patent ↗An underarm gang operated vacuum break switch (underarm switch) has an electrically live portion under a mounting arm, which provides advantages over the standard vacuum break switch, which have the electrically live portion above the mounting arm. Because the non-electrified mounting arm is above the electrified portion, the underarm switch is safer for perching birds and other wildlife. The nature of the underarm switch also provides other benefits including a disconnect blade that when opened creates a visual gap to ensure electrical discontinuity along with a safety locking arm tied to deactivating the underarm switch. Adding to the safety measures is a visual indicator that shows an electrician when the switch is live and safe to open the disconnect blade. Other safety measures include a shock absorber assembly and inertia slowing mass protecting electrical contacts within the vacuum break switch from failing.
1. A vacuum switch comprising:
a vacuum bottle containing a fixed electrical contact and a dynamic electrical contact, the vacuum bottle comprising a tubular member that extends between a fixed contact end and a dynamic contact end;
at least 75% of the tubular member encapsulated in a urethane insulator;
a rigid fiberglass shell disposed between an outer silicone ice-and-water shield housing and the urethane insulator.
2. The vacuum switch of claim 1 , wherein the outer silicone ice-and-water shield housing further comprises a plurality of ice-and-water bushings that are concentrically disposed around a vacuum bottle assembly axis that runs axially though the vacuum bottle.
3. The vacuum switch of claim 2 , wherein the outer silicone ice-and-water shield housing and the plurality of ice-and-water bushings are a single molded element.
4. The vacuum switch of claim 2 , wherein the vacuum bottle comprises a three-ply covering that encircles a vacuum region radially as defined by the vacuum bottle assembly axis, the three-ply covering consists of the urethane insulator, the rigid fiberglass shell and the outer silicone ice-and-water shield housing, the vacuum region is in the vacuum bottle.
5. The vacuum switch of claim 1 , wherein the urethane insulator covers a portion of both ends of the vacuum bottle.
6. The vacuum switch of claim 1 , wherein the vacuum bottle is part of a utility gang switch.
7. The vacuum switch of claim 1 , wherein the dynamic electrical contact is fixedly attached to a driving linkage in an actuator that actuates the dynamic electrical contact between an open orientation and a closed orientation.
8. The vacuum switch of claim 1 , wherein the dynamic electrical contact fixedly attached to an actuator that drives the dynamic electrical contact in either an open state or a closed state with the fixed electrical contact, the open state is when the dynamic electrical contact is spaced apart from the fixed electrical contact and the closed state is when the dynamic electrical contact is in contact with the fixed electrical contact.
9. The vacuum switch of claim 1 , wherein the vacuum bottle is composed of glass.
10. A vacuum bottle arrangement comprising:
a vacuum bottle arranged with a tubular portion extending along an axis between a fixed contact bottle end and a dynamic contact bottle end, the vacuum bottle comprising an internal vacuum chamber;
a fixed electrical contact extending into the internal vacuum chamber from the fixed contact bottle end and a dynamic electrical contact extending into the internal vacuum chamber from the dynamic contact bottle end; and
the tubular portion surrounded by a urethane insulator that is at least partially surrounded by a rigid shell that is at least partially surrounded by an ice-and-water shield housing.
11. The vacuum bottle arrangement of claim 10 , wherein ice-and-water shield housing is silicone.
12. The vacuum bottle arrangement of claim 10 , wherein the rigid shell is fiberglass.
13. The vacuum bottle arrangement of claim 10 , wherein only the urethane insulator, the rigid shell and ice-and-water shield housing surround the tubular portion.
14. The vacuum bottle arrangement of claim 10 , wherein the vacuum bottle, the urethane insulator, the rigid shell and ice-and-water shield housing are insulators that essentially prevent the flow of electricity therethrough.
15. The vacuum bottle arrangement of claim 10 , wherein the urethane insulator covers a portion of the fixed contact bottle end and the dynamic contact bottle end.
16. The vacuum bottle arrangement of claim 10 , wherein the vacuum bottle is glass.
17. The vacuum bottle arrangement of claim 10 further comprising a plurality of ice-and-water bushings that concentrically extend outwardly from the ice-and-water shield housing.
18. A method comprising:
providing a vacuum bottle switch that includes a vacuum bottle defined between a first end and a second end, the vacuum bottle comprising an internal vacuum chamber;
flowing electricity inside the vacuum bottle between the first end and the second end through a fixed electrical contact and a dynamic electrical contact when electrically connected;
halting the flow of the electricity through the fixed electrical contact and the dynamic electrical contact by separating the fixed electrical contact from the dynamic electrical contact,
the vacuum bottle at least partially surrounded by a urethane insulator that is at least partially surrounded by a rigid shell that is at least partially surrounded by an ice-and-water shield.
19. The method of claim 18 , wherein the ice-and-water shield housing is silicone and the rigid shell is fiberglass.
20. The method of claim 18 , wherein only the urethane insulator, the rigid shell and ice-and-water shield housing surround the vacuum bottle.