Bypass switch

Patent metadata

Field	Value
Publication number	US-9953779-B2
Application number	US-201615240862-A
Country	US
Kind code	B2
Filing date	Aug 18, 2016
Priority date	Feb 16, 2016
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A bypass switch includes: a casing; a vacuum interrupter disposed inside the casing, the vacuum interrupter being disposed such that a movable contact is movable to a fixed contact; a first fixing bus-bar fixed to the casing; a second fixing bus-bar fixed to the casing to be spaced apart from the first fixing bus-bar; a moving pusher connected to the movable contact; a drive source installed in the casing, the drive source pushing the moving pusher to a position at which the movable contact and the fixed contact are contacted with each other; and a multi-contactor disposed to be contacted with the moving pusher. Accordingly, the moving pusher can rapidly contact the movable contact with the fixed contact. Further, the moving pusher can be moved with a small external force. Thus, it is possible to minimize the size of the drive source and the power used in the drive source.

First claim

What is claimed is:

1. A bypass switch comprising:
a casing;
a vacuum interrupter disposed inside the casing, the vacuum interrupter being disposed such that a movable contact is movable to a fixed contact;
a first fixing bus-bar fixed to the casing;
a second fixing bus-bar fixed to the casing to be spaced apart from the first fixing bus-bar;
a moving pusher connected to the movable contact;
a drive source installed in the casing, the drive source pushing the moving pusher to a position at which the movable contact and the fixed contact are contacted with each other; and
a multi-contactor disposed to be contacted with the moving pusher,
wherein the multi-contactor comprises an outer body part surrounding an outer circumference of the moving pusher, the outer body part being spaced apart from the moving pusher, and a contact part protruding from the outer body part to be contacted with the moving pusher,
wherein the outer body part and the contact part are formed as a single body,
wherein the moving pusher comprises a moving part extending rod connected to the movable contact, and a latch plate connected to the moving part extending rod,
wherein the contact part is contacted with the moving part extending rod,
wherein a magnet allowing the movable contact to be spaced apart from the fixed contact by applying an attractive force to the latch plate is disposed inside the casing, and
when the drive source is driven, a piston is driven to apply, to the latch plate, an external force greater than the attractive force,
wherein the latch plate comprises a pin to which the piston applies an external force, and a plate body facing at least one portion of the magnet, and
wherein a pin insertion part in which an insertion hole having the pin inserted thereinto is formed at one surface of the plate body, and a connecting part connected to the moving part extending rod is formed at another surface of the plate body.

2. The bypass switch according to claim 1 , wherein the contact part is provided in plurality, and the plurality of contact parts are formed to be spaced apart from each other in a circumferential direction of the outer body part.

3. The bypass switch according to claim 1 , wherein the contact part is formed long in a direction parallel to a length direction of the moving part extending rod.

4. The bypass switch according to claim 1 , comprising a magnet holder disposed inside the casing to fix the magnet.

5. The bypass switch according to claim 4 , further comprising a spring elastically supporting the latch plate in a direction in which the movable contact and the fixed contact are contacted with each other.

6. The bypass switch according to claim 5 , wherein a spring seat part is formed in the magnet holder,
wherein a portion of the spring is inserted and accommodated in the spring seat part, and the spring seat part supports the spring.

7. The bypass switch according to claim 1 , wherein the casing comprises a multi-contactor supporter supporting the multi-contactor, the multi-contactor supporter being formed of a conductive material.

8. The bypass switch according to claim 7 , wherein a projection by which the multi-contactor is held protrudes from an inner circumference of the multi-contact supporter.

9. The bypass switch according to claim 7 , wherein the casing further comprises:
a first conductive casing coupled to the fixed contact and the first fixing bus-bar; and
a second conductive casing coupled to the multi-contactor supporter and the second fixing bus-bar.

10. The bypass switch according to claim 9 , wherein the second fixing bus-bar comprises:
a contact plate body contacted with the second conductive casing; and
a bending part bent from the contact plate body, the bending part being parallel to a direction in which the drive source protrudes to an outside.

11. The bypass switch according to claim 9 , wherein the casing further comprises an insulative casing disposed between the multi-contactor supporter and the first conductive casing, and
the insulative casing surrounds the vacuum interrupter at an outside of the vacuum interrupter.

12. The bypass switch according to claim 11 , wherein the multi-contactor supporter is disposed between the second conductive casing and the insulative casing.

13. The bypass switch according to claim 1 , wherein the outer body part comprises a hollow cylindrical body surrounding a portion of the moving pusher,
the hollow cylindrical body is disposed to be spaced apart from the moving pusher between the moving pusher and the multi-contactor supporter, and
the contact part is a protrusion protruding from an inner circumference of the hollow cylindrical body.

14. The bypass switch according to claim 13 , wherein the hollow cylindrical body has a bore spaced apart from an outer surface of the moving pusher.

15. A bypass switch comprising:
a casing;
a vacuum interrupter disposed inside the casing, the vacuum interrupter being disposed such that a movable contact is movable to a fixed contact;
a first fixing bus-bar fixed to the casing;
a second fixing bus-bar fixed to the casing to be spaced apart from the first fixing bus-bar;
a moving pusher connected to the movable contact;
a drive source installed in the casing, the drive source pushing the moving pusher to a position at which the movable contact and the fixed contact are contacted with each other; and
a multi-contactor disposed to be contacted with the moving pusher,
wherein the casing comprises a multi-contactor supporter supporting the multi-contactor, the multi-contactor supporter being formed of a conductive material,
wherein the casing further comprises:
a first conductive casing coupled to the fixed contact and the first fixing bus-bar; and
a second conductive casing coupled to the multi-contactor supporter and the second fixing bus-bar,
wherein a hollow cylindrical body surrounding a portion of the drive source protrudes from the second conductive casing, and
a hollow cylindrical body through-hole through which the hollow cylindrical body passes is formed in the second fixing bus-bar.

16. A bypass switch comprising:
a casing;
a vacuum interrupter disposed inside the casing, the vacuum interrupter being disposed such that a movable contact is movable to a fixed contact;
a first fixing bus-bar fixed to the casing;
a second fixing bus-bar fixed to the casing to be spaced apart from the first fixing bus-bar;
a moving pusher connected to the movable contact;
a drive source installed in the casing, the drive source pushing the moving pusher to a position at which the movable contact and the fixed contact are contacted with each other; and
a multi-contactor disposed to be contacted with the moving pusher,
wherein the casing comprises a multi-contactor supporter supporting the multi-contactor, the multi-contactor supporter being formed of a conductive material,
wherein the casing further comprises:
a first conductive casing coupled to the fixed contact and the first fixing bus-bar; and
a second conductive casing coupled to the multi-contactor supporter and the second fixing bus-bar,
wherein the casing further comprises an insulative casing disposed between the multi-contactor supporter and the first conductive casing, and
the insulative casing surrounds the vacuum interrupter at an outside of the vacuum interrupter,
wherein a fastening member through-hole through which a fastening member fastening the first conductive casing to the insulative casing passes is formed in the first conductive casing, and
the first fixing bus-bar c

Assignees

• Lsis Co Ltd

Inventors

• Jung Teag Sun

Classifications

• H01H79/00 Primary

  Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected {(H01H39/004 takes precedence)} · CPC title

• H02M1/32

  Means for protecting converters other than automatic disconnection · CPC title

• H01H39/004

  Closing switches · CPC title

• H01H33/666 Primary

  Operating arrangements · CPC title

• H01H39/002

  provided with a cartridge-magazine · CPC title