High voltage compact fusible disconnect switch device with magnetic arc deflection assembly
AssigneeCooper Technologies Company
InventorRobert Stephen Douglass
Life of this patent
Estimating the term…
Abstract
A compact fusible disconnect switch device includes a magnetic arc deflection assembly including at least a pair of magnets disposed about a switch contact assembly. The magnetic arc deflection assembly facilitates reliable connection and disconnection of DC voltage circuitry well above 125 VDC with reduced arcing intensity and duration. Multiple pairs of magnets may apply magnetic fields in directions opposing one another to deflect magnetic arcs in different directions at more than one location in the switch contact assembly to facilitate high voltage DC operation.
Claims20
A fusible disconnect switch device comprising:
- a nonconductive switch housing configured to accept an overcurrent protection fuse;
- a current path defined in the nonconductive switch housing, the current path comprising:
- a first fuse contact member and a second fuse contact member, the first fuse contact member and the second fuse contact member configured to complete an electrical connection through the overcurrent protection fuse;
- and
- a first switch contact connected to the first fuse contact member;
- a rotary actuator configured to move the first switch contact between an opened position and a closed position to complete or open the current path;
- and
- a first magnet and a second magnet disposed about the first switch contact, wherein the first and second magnets establish a first magnetic field therebetween and wherein the first switch contact is in the magnetic field.
A fusible disconnect switch device comprising:
- a nonconductive housing defining an exterior fuse receptacle and a first terminal blade opening and second terminal blade opening formed through the housing;
- a line-side terminal in the nonconductive housing;
- a line-side fuse terminal proximate the first terminal blade opening;
- at least one switch contact associated with at least one of the line-side terminal and the line-side fuse terminal;
- a switch actuator selectively positionable to move the switch contact between a closed position completing an electrical path from the line-side terminal to the line-side fuse terminal and an open position disconnecting the line-side contact from the line-side fuse terminal;
- and
- at least one pair of magnets imposing a magnetic field across the at least one switch contact.
A fused disconnect switch comprising:
- a nonconductive housing defining a fuse receptacle and first and second fuse contact members in the fuse receptacle;
- a line-side terminal carrying a first stationary contact;
- a line-side fuse terminal proximate the first terminal blade opening and comprising a second stationary contact;
- a switch actuator selectively positionable between a closed position and an open position;
- a sliding bar coupled to the actuator and carrying first and second movable switch contacts, the first and second switch contacts completing an electrical path from the line-side terminal to the line-side fuse terminal when the switch is in the closed position and disconnecting the line-side contact from the line-side fuse terminal when the switch actuator is in the opened position;
- and
- at least one pair of magnets imposing a magnetic field proximate at least one of the first and secondary stationary contacts, wherein an arc deflecting force is generated when the electrical path is disconnected.
Dependencies are inferred from the claim text.