GB1274117A - Improvements in or relating to overcurrent or overload protective arrangements having graded operating times - Google Patents

Improvements in or relating to overcurrent or overload protective arrangements having graded operating times

Info

Publication number
GB1274117A
GB1274117A GB5529870A GB5529870A GB1274117A GB 1274117 A GB1274117 A GB 1274117A GB 5529870 A GB5529870 A GB 5529870A GB 5529870 A GB5529870 A GB 5529870A GB 1274117 A GB1274117 A GB 1274117A
Authority
GB
United Kingdom
Prior art keywords
relays
network
elements
overcurrent
operating times
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5529870A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Publication of GB1274117A publication Critical patent/GB1274117A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency 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
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/30—Staggered disconnection

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

1,274,117. Protective arrangements. SPRECHER & SCHUH A.G. 20 Nov., 1970 26 Nov., 1969], No. 55298/70. Heading H2K. An overload protective arrangement for a network comprises a plurality of time-delay relays 6a ... 6e having elements to adjust their time delays in steps, circuit breakers 7a ... 7e controlled by the relays and a computer 9 connected to the relays to determine the location of a fault and effective to cause the setting of the adjusting elements of the relays so that the relay or relays 6c, 6d nearest the fault is or are set to operate in the shortest time t 0 and that or those nearer the supply or supplies 1, 10 to the network have progressively increasing operating times t 1 , t 2 . In a network having one supply point, the relays are overcurrent relays, but in a network having two supply points the relays are directional overcurrent relays. It is stated that the computer may be connected to the operating elements, adjusting elements and switching elements of the relays by telephone trunk lines, high-voltage carrier frequency, or microwave lines, or laser channels.
GB5529870A 1969-11-26 1970-11-20 Improvements in or relating to overcurrent or overload protective arrangements having graded operating times Expired GB1274117A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1765269A CH503403A (en) 1969-11-26 1969-11-26 Overcurrent protection device on an electrical network, with staggered tripping times of their protective relays

Publications (1)

Publication Number Publication Date
GB1274117A true GB1274117A (en) 1972-05-10

Family

ID=4427055

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5529870A Expired GB1274117A (en) 1969-11-26 1970-11-20 Improvements in or relating to overcurrent or overload protective arrangements having graded operating times

Country Status (4)

Country Link
AT (1) AT301668B (en)
CH (1) CH503403A (en)
DE (1) DE2049176A1 (en)
GB (1) GB1274117A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341737A (en) * 1998-09-17 2000-03-22 Alstom Uk Ltd Fault protection apparatus for use in a time-graded fault protection scheme
EP1361638A2 (en) * 2002-05-07 2003-11-12 Alstom Improved power line protection

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341737A (en) * 1998-09-17 2000-03-22 Alstom Uk Ltd Fault protection apparatus for use in a time-graded fault protection scheme
EP0987807A3 (en) * 1998-09-17 2002-01-23 Alstom UK Limited Fault protection apparatus
US6373670B1 (en) 1998-09-17 2002-04-16 Alstom Uk Limited Fault protection apparatus
GB2341737B (en) * 1998-09-17 2003-03-05 Alstom Uk Ltd Fault protection apparatus
EP1361638A2 (en) * 2002-05-07 2003-11-12 Alstom Improved power line protection
GB2388482A (en) * 2002-05-07 2003-11-12 Alstom Power line protection using time-graded relays
GB2388482B (en) * 2002-05-07 2005-06-15 Alstom Improved power line protection
US7102866B2 (en) 2002-05-07 2006-09-05 Areva T&D Sa Power line protection
CN100401609C (en) * 2002-05-07 2008-07-09 阿雷瓦T&D股份有限公司 Improved power-line protection
EP1361638A3 (en) * 2002-05-07 2011-07-20 Areva T&D Sas Improved power line protection

Also Published As

Publication number Publication date
AT301668B (en) 1972-09-11
DE2049176A1 (en) 1971-06-03
CH503403A (en) 1971-02-15

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee