Title:
PROTECTION ASSISTANCE DEVICE OF MULTIPLE CIRCUIT BREAKERS IN LOW-VOLTAGE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/172504
Kind Code:
A1
Abstract:
The present invention provides a protection assistance device of multiple circuit breakers in a low-voltage system, in which protection assistance in both directions from the upper side to the lower side or from the lower side to the upper side is possible, and the number of wires for protection assistance between multiple upper/lower circuit breakers can be minimized. A protection assistance device according to the present invention comprises: at least one upper low-voltage circuit breaker which has a communication unit and is connected to a first branch circuit between an upper most power circuit and an upper power circuit; at least one middle low-voltage circuit breaker which has a communication unit and is connected to a second branch circuit between an upper power circuit and a lower power circuit; at least one lower low-voltage circuit breaker which has a communication unit and is connected to a third branch circuit between a lower power circuit and a lowermost power circuit; and a communication line which makes a communication connection between the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker, wherein the upper low-voltage circuit breaker, the middle low-voltage circuit breaker, and the lower low-voltage circuit breaker comprise a control unit for, when a trip operation of automatically breaking a circuit due to abnormal current occurrence in a connected branch circuit is performed, transmitting a communication packet for reporting a trip operation state to at least one predetermined circuit breaker among the circuit breakers through the communication line.
More Like This:
Inventors:
HAM SUNGSIK (KR)
Application Number:
PCT/KR2018/014325
Publication Date:
September 12, 2019
Filing Date:
November 21, 2018
Export Citation:
Assignee:
LSIS CO LTD (KR)
International Classes:
H02H3/05; H02H1/00; H04L45/18
Foreign References:
| KR101621653B1 | 2016-05-31 | |||
| KR101337565B1 | 2013-12-06 | |||
| KR100865361B1 | 2008-10-24 | |||
| US20110127852A1 | 2011-06-02 | |||
| KR20030090480A | 2003-11-28 |
Other References:
See also references of EP 3764497A4
Attorney, Agent or Firm:
PARK, Jang-Won (KR)
Download PDF: