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1. WO2000039822 - METHOD OF DETECTING MANUAL TRIPS IN AN INTELLIGENT ELECTRONIC DEVICE

Publication Number WO/2000/039822
Publication Date 06.07.2000
International Application No. PCT/US1999/031082
International Filing Date 28.12.1999
IPC
H01H 1/00 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
1Contacts
H01H 9/16 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
9Details of switching devices, not covered by groups H01H1/-H01H7/104
16Indicators for switching condition, e.g. "on" or "off"
H01H 71/04 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/-H01H83/115
04Means for indicating condition of the switching device
CPC
H01H 1/0015
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
1Contacts
0015Means for testing or for inspecting contacts, e.g. wear indicator
H01H 71/04
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
04Means for indicating condition of the switching device
H01H 9/167
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
9Details of switching devices, not covered by groups H01H1/00 - H01H7/00
16Indicators for switching condition, e.g. "on" or "off"
167Circuits for remote indication
Applicants
  • GENERAL ELECTRIC COMPANY [US/US]; 1 River Road Schenectady, NY 12345, US
Inventors
  • ANDERSEN, Bo, L.; US
Agents
  • CHASKIN, Jay, L. ; General Electric Company 3135 Easton Turnpike W3C Fairfield, CT 06431, US
Priority Data
09/221,24428.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD OF DETECTING MANUAL TRIPS IN AN INTELLIGENT ELECTRONIC DEVICE
(FR) PROCEDE DE DETECTION DE DECLENCHEMENTS MANUELS DANS UN DISPOSITIF ELECTRONIQUE INTELLIGENT
Abstract
(EN)
A method of detecting manual trips and reclose operations in an intelligent electronic device, e.g., electronic trip unit or protective relay, is presented. The intelligent electronic device includes a microcontroller and associated memories. An algorithm (program) stored in a memory of the intelligent electronic device detects manual trips when the following conditions are satisfied: (1) no trip or reclose event message has been issued by the trip unit within the reaction time required to trip the circuit breaker; (2) current becomes zero on all phases of the line; and (3) voltage downstream from the circuit breaker becomes zero on all phases. Reclose operations are detected when load side voltages on all phases return from 0V to nominal levels of the line side of the breaker.
(FR)
L"invention concerne un procédé de détection de déclenchements manuels et d"opérations de réenclenchement dans un dispositif électronique intelligent tel que, par exemple, une unité de déclenchement ou un relais de protection. Le dispositif électronique intelligent comprend un micro-organe de commande et des mémoires associées. Un algorithme (programme) mémorisé dans une mémoire du dispositif électronique intelligent détecte des déclenchements manuels lorsque les conditions suivantes sont réunies: (1) aucun message de déclenchement ou de réenclenchement n"a été envoyé par l"unité de déclenchement dans le temps de réaction nécessaire à l"enclenchement du disjoncteur; (2) le courant devient nul dans toutes les phases du secteur; et (3) la tension en aval du disjoncteur devient nulle dans toutes les phases. Les opérations de réenclenchement sont détectées lorsque des tensions de côté charge dans toutes les phases repassent de 0V à des niveaux nominaux du côté secteur du disjoncteur.
Also published as
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