公开(公告)号：US20200373753A1

公开(公告)日：2020-11-26

申请号：US16419405

申请日：2019-05-22

Applicant: Eaton Intelligent Power Limited

Inventor： Zhi GAO ,  Daniel A. Hosko ,  Randy P. Shvach ,  James Leo Lagree ,  Paul Richard Rakus ,  Ronald Dale Hartzel

IPC: H02H7/26 ,  H02H1/00

Abstract: Various embodiments of the present invention are directed to a first trip unit that is configured to be coupled to a power distribution system arranged in a Zone Selective Interlocking (ZSI) arrangement. The first trip unit includes an Input/Output circuit including a ZSI input terminal and a ZSI output terminal, a heartbeat signaling module configured to transmit a second signal to a second trip unit in a lower-level zone than the first trip unit, responsive to the normal condition, a first monitoring module configured to monitor a first signal received by the first trip from a third trip unit in a higher-level zone, responsive to the normal condition, and a second monitoring module configured to detect the fault condition. Related systems, devices, and methods are also described.

公开(公告)号：US20200161850A1

公开(公告)日：2020-05-21

申请号：US16193254

申请日：2018-11-16

Applicant: Eaton Intelligent Power Limited

Inventor： Paul R. Rakus ,  James Leo Lagree ,  Zhi Gao ,  Ronald Dale Hartzel

IPC: H02H3/16 ,  H02H3/04 ,  H02H1/00

Abstract: A method involves a circuit interrupter installation having a circuit interrupter with a plurality of poles and an ETU electrically connected with a neutral current sensor situated in proximity to a neutral conductor. The method includes determining that a plurality of fundamental frequency phase current vectors, when summed, are substantially equal to a fundamental frequency neutral current vector, and/or that a plurality of triplen odd-numbered harmonic phase current vectors, when summed, are substantially equal to a triplen odd-numbered harmonic neutral current vector. Responsive to the determining, the method includes outputting a notification which represents a possibility that a neutral current detection apparatus is mis-wired, and/or employing with the ETU a reverse vector that is an opposite of the fundamental frequency neutral current vector in the ongoing monitoring for an event that would trigger the movement of the circuit interrupter from the ON condition to the OFF or TRIPPED condition.

公开(公告)号：US10992126B2

公开(公告)日：2021-04-27

申请号：US16193254

申请日：2018-11-16

Applicant: EATON INTELLIGENT POWER LIMITED

Inventor： Paul R. Rakus ,  James Leo Lagree ,  Zhi Gao ,  Ronald Dale Hartzel

IPC: H02H3/16 ,  H02H1/00 ,  H02H3/04

Abstract: A method involves a circuit interrupter installation having a circuit interrupter with a plurality of poles and an ETU electrically connected with a neutral current sensor situated in proximity to a neutral conductor. The method includes determining that a plurality of fundamental frequency phase current vectors, when summed, are substantially equal to a fundamental frequency neutral current vector, and/or that a plurality of triplen odd-numbered harmonic phase current vectors, when summed, are substantially equal to a triplen odd-numbered harmonic neutral current vector. Responsive to the determining, the method includes outputting a notification which represents a possibility that a neutral current detection apparatus is mis-wired, and/or employing with the ETU a reverse vector that is an opposite of the fundamental frequency neutral current vector in the ongoing monitoring for an event that would trigger the movement of the circuit interrupter from the ON condition to the OFF or TRIPPED condition.

公开(公告)号：US10998716B2

公开(公告)日：2021-05-04

申请号：US16419405

申请日：2019-05-22

Applicant: Eaton Intelligent Power Limited

Inventor： Zhi Gao ,  Daniel A. Hosko ,  Randy P. Shvach ,  James Leo Lagree ,  Paul Richard Rakus ,  Ronald Dale Hartzel

IPC: H02H7/26 ,  H02H1/00 ,  G01R31/08

Abstract: Various embodiments of the present invention are directed to a first trip unit that is configured to be coupled to a power distribution system arranged in a Zone Selective Interlocking (ZSI) arrangement. The first trip unit includes an Input/Output circuit including a ZSI input terminal and a ZSI output terminal, a heartbeat signaling module configured to transmit a second signal to a second trip unit in a lower-level zone than the first trip unit, responsive to the normal condition, a first monitoring module configured to monitor a first signal received by the first trip from a third trip unit in a higher-level zone, responsive to the normal condition, and a second monitoring module configured to detect the fault condition. Related systems, devices, and methods are also described.