Interlock system for a circuit breaker system

Patent metadata

Field	Value
Publication number	US-10840034-B2
Application number	US-201816233252-A
Country	US
Kind code	B2
Filing date	Dec 27, 2018
Priority date	Dec 27, 2018
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

An interlock system including an actuatable motor control assembly, a movable access door and an interlock assembly. The actuatable motor control assembly is structured to energize and de-energize a racking assembly motor. The movable access door is structured to move between an open, first position wherein the access door does not block access to a manual racking assembly socket, and, a closed, second position wherein the access door blocks access to the manual racking assembly socket. The interlock assembly is structured to detect the configuration of the separable contact assembly and the position of the access door, and, to actuate the motor control assembly so as to energize the motor only when the separable contact assembly is in an open, first configuration and when the access door is in a closed, second position.

First claim

What is claimed is:

1. An interlock system for a circuit breaker system, said circuit breaker system including an enclosure, a racking assembly, and a circuit breaker assembly, said enclosure defining an enclosed space, said racking assembly including a carriage, a manual racking assembly, a motor, and a position indicator, said racking assembly carriage structured to move between a number of set positions including a disconnect, first position and a connect, second position, wherein, if said racking assembly carriage is not in an identified set position, said racking assembly carriage is in transition, said manual racking assembly is structured to move said racking assembly carriage between said racking assembly carriage set positions, said manual racking assembly including a rotating rod with a socket, said motor structured to move said racking assembly carriage between said racking assembly carriage set positions, said racking assembly position indicator including an indicator member body, said indicator member body structured to move with said racking assembly carriage, said circuit breaker assembly including a separable contact assembly, said separable contact assembly including a number of fixed contacts and a number of movable contacts, the movable contacts movable between a first configuration, wherein the movable contacts are spaced from, and are not in electrical communication with, the fixed contacts, and, a second configuration, wherein the movable contacts are coupled to, and are in electrical communication with, the fixed contacts, said circuit breaker assembly further including an operating mechanism contact position indicator member and a manually actuatable trip assembly member, said circuit breaker assembly disposed on said racking assembly carriage, said interlock system comprising:
a movable access door structured to move between an open, first position wherein said access door does not block access to said manual racking assembly socket, and, a closed, second position wherein said access door blocks access to said manual racking assembly socket; and
an interlock assembly structured to allow manual use of said racking assembly when said access door is in said first position, to allow use of said motor when said access door is in said second position, and to maintain said movable contacts in said first configuration when said racking assembly carriage is in transition.

2. The interlock system of claim 1 wherein:
said interlock assembly is structured to detect the configuration of said separable contact assembly and the position of said access door, and, which includes a first latch assembly structured to maintain said access door in said first position when said racking assembly carriage is in transition and structured to release said access door to be moved to said second position when said racking assembly carriage is in a set position.

3. The interlock system of claim 2 wherein:
said first latch assembly includes an access door latch member;
said access door latch member including a body with an access door interface and a pivoting member interface; and
said access door latch member structured to move between a first position, wherein said access door latch member engages said access door and maintains said access door in said access door first position, and, a second position, wherein said access door latch member releases said access door thereby allowing said access door to move to said access door second position.

4. The interlock system of claim 3 wherein:
said first latch assembly includes a pivoting member;
said pivoting member including a body;
said pivoting member body including an access door latch member interface, a cam, and a trip assembly member interface;
said pivoting member body structured to pivot between an access door open, first position, wherein said pivoting member body trip assembly member interface actuates said trip assembly member, and an access door closed, second position, wherein said pivoting member body trip assembly member interface does not actuate said trip assembly member;
wherein, when said pivoting member body is in said pivoting member body first position, said pivoting member body access door latch member interface does not engage said access door latch member pivoting member interface whereby said access door latch member is biased to said first position; and
wherein, when said pivoting member body is in said pivoting member body second position, said pivoting member body access door latch member interface engages said access door latch member body pivoting member interface and maintains said access door latch member in said access door latch member second position.

5. The interlock system of claim 4 wherein:
said first latch assembly includes a number of camming surfaces that are defined by a number of recesses in said racking assembly position indicator;
said first latch assembly number of camming surfaces structured to move along a camming path that engages said pivoting member body cam;
wherein, when a first latch assembly number of camming surface fully engages said pivoting member body cam, said pivoting member body is moved to the pivoting member body second position;
wherein said first latch assembly number of camming surfaces includes a first position camming surface and a second position camming surface;
said first camming surface is structured to fully engage said pivoting member body cam when said racking assembly carriage is in said racking assembly carriage first position; and
said second camming surface is structured to fully engage said pivoting member body cam when said racking assembly carriage is in said racking assembly carriage second position.

6. The interlock system of claim 2 wherein:
said access door includes a trip assembly member interface;
said access door trip assembly member interface is structured to actuate said trip assembly member when said access door is in said first position; and
said access door trip assembly member interface is structured to not actuate said trip assembly member when said access door is in said second position.

7. The interlock system of claim 2 further comprising:
an actuatable motor control assembly structured to enable/disable said racking assembly motor; and
said interlock assembly structured to activate said motor control assembly so as to enable said motor only when said separable contact assembly is in said first configuration and when said access door is in said closed, second position.

8. The interlock system of claim 7 wherein:
said access door includes a motor control assembly actuator interface;
said access door motor control assembly actuator interface is structured to activate said motor control assembly when said access door is in said second position; and
said access door motor control assembly actuator interface is not structured to activate said motor control assembly when said access door is in said first position.

9. The interlock system of claim 8 wherein:
said interlock assembly includes an access door position sensor;
said access door position sensor including an actuation switch;
said access door position sensor structured to provide an activation signal to the motor control assembly when said access door position sensor actuation switch is actuated and not to provide an activation signal to the motor control assembly when said access door position sensor actuation switch is not actuated; and
said access door position sensor positioned so that, when said access door is in said first position, said access door motor control assembly actuator interface does not actuate said access door position sensor actuation switch, and, when said access door is in said s

Assignees

• Eaton Intelligent Power Ltd

Inventors

• Rakus Paul Richard

Classifications

• H01H71/0264

  Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel · CPC title

• H02B11/133

  with interlock · CPC title

• H01H9/22 Primary

  for interlocking between casing, cover, or protective shutter and mechanism for operating contacts {(explosion-proof cases H01H9/045; built-in fuses and interlocking mechanisms H01H9/104; by automatic release of circuit breakers H01H71/126)} · CPC title

• H01H71/02

  Housings; Casings; Bases; Mountings · CPC title

• H01H71/126

  actuated by dismounting of circuit breaker or removal of part of circuit breaker · CPC title