Delay time generation apparatus for air circuit breaker

Patent metadata

Field	Value
Publication number	US-9899177-B2
Application number	US-201615299392-A
Country	US
Kind code	B2
Filing date	Oct 20, 2016
Priority date	Dec 28, 2015
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

A delay time generation apparatus for an air circuit breaker according to the present invention can provide an effect of ensuring a delay time as long as possible even in a narrow space upon outputting a signal related to a conductive state, by virtue of interaction of a main shaft, a pin portion, a first rotating unit, a second rotating unit and a spring member.

First claim

What is claimed is:

1. A delay time generation apparatus for an air circuit breaker that outputs a conductive signal through a switch with a preset delay time when a movable contactor contacts a fixed contactor, the apparatus comprising:
a pin portion moved downward when the movable contactor contacts the fixed contactor;
a main shaft rotated to a contact position or a trip position in response to movement of the movable contactor;
a first rotating unit on the main shaft, the first rotating unit released from a state in which it is adhered to the main shaft and rotated in a clockwise direction through the pin portion when the movable contactor is moved to the contact position and in a counterclockwise direction through the main shaft when the movable contactor is moved to the trip position; and
a second rotating unit below the first rotating unit, the second rotating unit rotated in response to rotation of the first rotating unit such that it contacts or separates from the switch in order to output the conductive signal,
wherein a lower end of the pin portion includes a pressing plate that presses the first rotating unit in response to movement of the pin portion.

2. The apparatus of claim 1 , further comprising a spring member having one side connected to the second rotating unit in order to apply an elastic force to cause the second rotating unit to rotate clockwise when the movable contactor is located at the trip position such that the second rotating unit and the switch are separated from each other,
wherein a connected portion between the spring member and the second rotating unit changes in response to rotation of the second rotating unit when the movable contactor is moved to the contact position such that the spring member applies the elastic force to cause the second rotating unit to rotate counterclockwise and contact the switch.

3. The apparatus of claim 1 , wherein the first rotating unit comprises:
a body portion having bent connection arms extending from both sides for connection to an inside of the air circuit breaker;
a holder between the connection arms, the holder pushed down by the pin portion when the movable contactor is moved to the contact position;
a rotation adjusting plate extending toward the second rotating unit from a lower end of a side surface of the body portion, wherein the rotation adjusting plate pushes the second rotating unit in response to rotation of the body portion such that the second rotating unit contacts the switch when the movable contactor is moved to the contact position and the rotation adjusting plate rotates the second rotating unit in response to rotation of the body portion such that the second rotating unit is separated from the switch when the movable contactor is moved to the trip position; and
a stopping portion extending from a lower end of the body portion toward the main shaft, the stopping portion contacting the main shaft in order to rotate the body portion when the movable contactor is moved to the trip position.

4. The apparatus of claim 3 , wherein the stopping portion comprises:
an extending plate extending toward the main shaft from the lower end of the body portion; and
an bent adhering plate extending downward from a front end of the extending plate, the adhering plate contacting the main shaft in response to rotation of the main shaft.

5. The apparatus of claim 3 , wherein an upper end of the holder comprises an upward protrusion that prevents shaking of the pin portion when the holder is adhered to the pin portion.

6. The apparatus of claim 3 , wherein the second rotating unit comprises:
a first rotating plate below the first rotating unit, the first rotating plate rotated by the rotation adjusting plate and contacting the switch when the movable contactor is moved to the contact position; and
a second rotating plate extending toward the first rotating unit from one side of the first rotating plate, the second rotating plate rotated by the rotation adjusting plate and separated from the switch when the movable contactor is moved to the trip position.

7. The apparatus of claim 3 , wherein the main shaft comprises a protruding portion protruding toward the first rotating unit, the protruding portion pushing the stopping portion to rotate the first rotating unit such that the second rotating unit rotates and separates from the switch when the movable contactor is moved to the trip position.

8. The apparatus of claim 6 , wherein the second rotating plate is inwardly bent by a predetermined angle.

9. The apparatus of claim 6 , wherein a first side of the first rotating plate comprises a connecting plate having an insertion hole through which one side of the spring member is inserted.

10. The apparatus of claim 9 , wherein a second side of the first rotating plate comprises a hinge portion connected to an inside of the air circuit breaker.

Assignees

• Lsis Co Ltd

Inventors

• Lee Kyuho

Classifications

• H01H71/44 Primary

  having means for introducing a predetermined time delay (by short-circuited winding H01H71/30; by additional armature H01H71/34) · CPC title

• H01H71/465

  Self-contained, easily replaceable microswitches · CPC title

• H01H77/10 Primary

  with electrodynamic opening {(combined with electromagnetic release mechanism H01H71/2418)} · CPC title