Shunt trip assembly

Patent metadata

Field	Value
Publication number	US-11515115-B2
Application number	US-201916698002-A
Country	US
Kind code	B2
Filing date	Nov 27, 2019
Priority date	Nov 27, 2019
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A shunt trip assembly is structured to be operatively coupled to a number of circuit breakers. The shunt trip assembly includes a housing assembly and an actuating assembly. The actuating assembly includes a limited number of components. In another embodiment, the shunt trip assembly housing assembly is a substantially sealed housing assembly. In another embodiment, the shunt trip assembly housing assembly includes a single mounting panel.

First claim

What is claimed is:

1. A shunt trip assembly structured to be operatively coupled to a number of circuit breakers, said shunt trip assembly comprising:
a shunt trip assembly housing assembly defining a substantially enclosed space and including a lever member axle structured to be operatively coupled to an operating mechanism of the number of circuit breakers;
an actuating assembly including a solenoid, a single micro-switch, and a lever member; and
wherein:
said actuating assembly is structured to actuate said number of circuit breakers;
said micro-switch includes a pivoting actuator;
said solenoid includes a solenoid plunger;
said lever member includes a rotational coupling that couples said lever member to said lever member axle;
said lever member includes a first arm extending generally radially from said rotational coupling, said first arm comprising a distal end coupled to said solenoid plunger;
said lever member includes a second arm extending generally radially from said rotational coupling, said second arm comprising a distal end structured to operatively engage said micro-switch pivoting actuator;
said solenoid plunger is structured to move between a first position and a second position;
said micro-switch pivoting actuator is structured to move between a first position, wherein said micro-switch is structured to transmit a solenoid operating current to said solenoid, and a second position, wherein said micro-switch is not structured to transmit a solenoid operating current to said solenoid;
said lever member is structured to move between a first position, wherein said lever member does not operatively engage said micro-switch pivoting actuator, and a second position, wherein said lever member operatively engages said micro-switch pivoting actuator; and
said solenoid plunger is operatively coupled to said lever member and is structured to move said lever member between said lever member first position and said lever member second position.

2. The shunt trip assembly of claim 1 wherein said lever member is a common lever member.

3. The shunt trip assembly of claim 1 :
wherein said lever member body first arm is longer than said lever member body second arm.

4. The shunt trip assembly of claim 1 wherein:
said micro-switch is structured to selectively transmit said solenoid operating current to said solenoid;
said solenoid is structured to receive said solenoid operating current;
wherein said micro-switch is structured to be in a second configuration wherein a solenoid operating current passes therethrough to said solenoid;
wherein said solenoid is structured to be actuated upon receiving said solenoid operating current and thereby move said lever member from said lever member first position to said lever member second position;
wherein movement of said lever member from said lever member first position to said lever member second position causes said lever member to operatively engage said micro-switch pivoting actuator and change said micro-switch to a first configuration wherein said solenoid operating current does not pass therethrough; and
wherein said solenoid is de-energized.

5. A shunt trip assembly structured to be operatively coupled to a number of circuit breakers, said shunt trip assembly comprising:
a shunt trip assembly housing assembly defining a substantially enclosed space;
an actuating assembly including a limited number of components; and
said actuating assembly structured to actuate said number of circuit breakers;
wherein said actuating assembly limited number of components includes a solenoid, a micro-switch, and a lever member;
wherein:
said lever member includes a body having a first arm, a second arm and a rotational coupling;
said lever member body first arm extending generally radially from said lever member body rotational coupling;
said lever member body second arm extending generally radially from said lever member body rotational coupling; and

wherein said lever member body first arm is longer than said lever member body second arm;
wherein:
said solenoid includes a plunger;
said micro-switch includes a pivoting actuator;
said lever member body first arm includes a distal end;
said lever member body first arm distal end structured to be coupled to said solenoid plunger;
said lever member body second arm includes a distal end; and
said lever member body second arm distal end structured to operatively engage said micro-switch pivoting actuator;

wherein:
said micro-switch is structured to selectively transmit a solenoid operating current to said solenoid;
said solenoid is structured to receive an operating current;
said lever member is structured to move between a first position, wherein said lever member does not operatively engage said micro-switch, and, a second position, wherein said lever member operatively engages said micro-switch;
said solenoid is operatively coupled to said lever member and is structured to move said lever member between said lever member first position and said lever member second position;

wherein said micro-switch is structured to be in a second configuration wherein a solenoid operating current passes therethrough to said solenoid;
wherein said solenoid is structured to be actuated upon receiving an operating current and thereby move said lever member to said lever member second position;
wherein said lever member is structured to operatively engage said micro-switch and change said micro-switch to a first configuration wherein a solenoid operating current does not pass therethrough; and
wherein said solenoid is de-energized;
wherein:
said solenoid plunger is structured to move between a first position and a second position;
said micro-switch pivoting actuator is movable between a first position, wherein said micro-switch is structured to transmit a solenoid operating current to said solenoid, and, a second position, wherein said micro-switch is not structured to transmit a solenoid operating current to said solenoid;
said lever member is structured to move between a first position, wherein said lever member does not operatively engage said micro-switch pivoting actuator, and, a second position, wherein said lever member operatively engages said micro-switch pivoting actuator; and
said solenoid plunger is operatively coupled to said lever member and is structured to move said lever member between said lever member first position and said lever member second position.

6. The shunt trip assembly of claim 1 wherein said shunt trip assembly housing assembly is a substantially sealed housing assembly.

7. The shunt trip assembly of claim 1 wherein said shunt trip assembly housing assembly includes a single mounting panel.

8. The shunt trip assembly of claim 5 , wherein said solenoid is structured to be actuated by said operating current regardless of whether said operating current is AC or DC.

9. The shunt trip assembly of claim 8 , wherein said shunt trip assembly is structured to interrupt transmission of said solenoid operating current to said solenoid within 0.033 seconds of said transmission commencing.

10. The shunt trip assembly of claim 9 , wherein said shunt trip assembly operating in continuous supply, cut off the power supply to solenoid through actuation of the micro-switch via shunt lever in associated breaker axle position at de-latch condition.

11. The shunt trip assembly of claim 5 , wherein pins of the micro-switch of said shunt trip assembly can be used for indicating actuation of the shunt trip via a LED, alarming or other indicating means.

12. The shunt trip assembly of claim 1 , wherein said solenoid is structured to be a

Assignees

• Eaton Intelligent Power Ltd

Inventors

• Jamdade Akshay B
• Satyanarayanan Karthik
• Kawale Srushti
• Sawai Nilesh

Classifications

• H01H50/54

  Contact arrangements · CPC title

• H01H47/22

  for supplying energising current for relay coil · CPC title

• H01H2071/086

  Low power connections for auxiliary switches, e.g. shunt trip · CPC title

• H01H50/023

  Details concerning sealing, e.g. sealing casing with resin · CPC title

• H01H2235/01

  Spiral spring · CPC title