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1. CA2995512 - LOCALIZED APPLICATION OF HIGH IMPEDANCE FAULT ISOLATION IN MULTI-TAP ELECTRICAL POWER DISTRIBUTION SYSTEM

Office
Canada
Application Number 2995512
Application Date
Publication Number 2995512
Publication Date 16.08.2018
Publication Kind A1
IPC
H02J 13/00
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
13Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
H02H 7/26
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
7Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
CPC
G01R 31/086
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
08Locating faults in cables, transmission lines, or networks
081according to type of conductors
086in power transmission or distribution networks, i.e. with interconnected conductors
G01R 31/52
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
52Testing for short-circuits, leakage current or ground faults
H02H 3/042
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection
02Details
04with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
042combined with means for locating the fault
H02H 7/261
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
7Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
261involving signal transmission between at least two stations
H02J 13/00026
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
13Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
00006characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
00022using wireless data transmission
00026involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
H02J 13/00034
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
13Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
00032Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
00034the elements or equipment being or involving an electric power substation
Applicants ELECTRICAL MATERIALS COMPANY
Priority Data 15435002 16.02.2017 US
Title
(EN) LOCALIZED APPLICATION OF HIGH IMPEDANCE FAULT ISOLATION IN MULTI-TAP ELECTRICAL POWER DISTRIBUTION SYSTEM
(FR) APPLICATION LOCALISEE D'ISOLATION DE DEFAUT DE HAUTE IMPEDANCE DANS UN SYSTEME DE DISTRIBUTION D'ELECTRICITE A PRISES MULTIPLES
Abstract
(EN)
A high impedance fault isolation system (HIFIS) identifies, isolates and
dissipates
high impedance, low current faults which occur within an individual tap, or
branch,
of an electric power distribution system using only portions of the tap
affected. A
master meter, or father smart meter (FSM), on the affected tap sends a coded
signal
to an antenna receiver combined with a microprocessor and chip which operates
an
electromagnetic control (EMC) grounding spring switch which isolates the
downed
primary conductor by causing the distribution system protecting device, i.e.,
a high
voltage fuse or recloser, to de-energize the downed primary wire. This
localized
application of the HIFIS at the individual tap level allows the FSM to analyze
and
determine, for example, that the specific field condition is a "downstream
wire
down", and that the installed isolating device has failed to operate because
of
insufficient fault current, allowing the localized intervention of the HIFIS
to achieve
the de-energization more efficiently and safely, and within a much shorter
time
period. A fire door sensor circuit then receives the trip signal from the
microprocessor, causing the fire door sensor to melt open and release a
shorting
spring, in initiating operation of an expulsion fuse or recloser, which kills
the downed
live
wire.


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