Use of the preset circuit diagram for variable resistors

EP0657062A1 - Changeable high-current resistor and its use as a protective component. - Google Patents

Changeable high-current resistor and its use as a protective component.

info

Publication number
EP0657062A1
EP0657062A1EP19930917545EP93917545AEP0657062A1EP 0657062 A1EP0657062 A1EP 0657062A1EP 19930917545 EP19930917545 EP 19930917545EP 93917545 AEP93917545 AEP 93917545AEP 0657062A A1
Authority
EP
European Patent Office
Prior art keywords
current
resistor
changeable
circuit
current resistor
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.)
Granted
Application number
EP19930917545
Other languages
German (de)
French (fr)
Other versions
EP0657062B1 (en
EP0657062B2 (en
Inventor
Hubert Grosse-Wilde
Joerg Kieser
Wilfried Jaehner
Fritz Pohl
Reinhard Steger
Gert Vogel
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.)
Siemens AG
Original assignee
Siemens 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
Family has litigation
Priority to DE4228297priorityCritical
Priority to DE19924228297prioritypatent / DE4228297A1 / en
Application filed by Siemens AGfiledCriticalSiemens AG
Priority to PCT / DE1993 / 000721 ​​priority patent / WO1994006130A1 / en
Publication of EP0657062A1publicationCriticalpatent / EP0657062A1 / en
Publication of EP0657062B1publicationCriticalpatent / EP0657062B1 / en
First worldwide family litigation filedlitigationCriticalhttps: //patents.darts-ip.com/? Family = 6466429 & utm_source = google_patent & utm_medium = platform_link & utm_campaign = public_patent_search & patent = EP0657062 (A1) "Global patent litigation dataset" by Darts-ip is licensed under a Creative Commons Attribution 4.0 License.
Application granted granted Critical
Publication of EP0657062B2publicationCriticalpatent / EP0657062B2 / en
Anticipated expirationlegal-statusCritical
Expired - Lifetimelegal-statusCriticalCurrent

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Classifications

    • H-ELECTRICITY
    • H02 GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H — EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9 / 00 — Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9 / 02 — Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9 / 026 — Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
    • H-ELECTRICITY
    • H01 — BASIC ELECTRIC ELEMENTS
    • H01C-RESISTORS
    • H01C10 / 00 — Adjustable resistors
    • H01C10 / 10 — Adjustable resistors adjustable by mechanical pressure or force

Abstract

Description

Changeable high current resistance and use as a protective element
Changeable high-current resistor, in particular for use as a protective element in power switching technology, and switching using the high-current resistor
The invention relates to a variable high-current resistor, in particular for use as a protective element in power switching technology, with carbon as the resistance material, with at least one interface of a layer containing carbon and / or soot with a transition zone to a further electrical conductor which is acted upon by a compressive force. In addition, the invention relates to circuits using such a high-current resistor. The invention relates to a variable high-current resistor, in particular for use as a protective element in power switching technology, with carbon as the resistance material, at least one interface of a layer containing carbon and / or soot having a transition zone to a further electrical conductor being present is acted upon by a compressive force. In addition, the invention relates to circuits using such a high current resistor.
In electrical low-voltage distributions, the circuit breakers must be able to switch off the maximum short-circuit current to be expected in the event of a short-circuit, for safety reasons. This current can be 50 kA or 100 kA in the vicinity of busbars. Circuit breakers with this switching capacity must open the contacts and build up a high arc voltage in a time that is small in relation to the duration of a network cycle in order to sufficiently limit the short-circuit current able to switch off the maximum short-circuit current to be expected in the event of a short circuit for safety reasons. This current can be 50 kA or 100 kA in the vicinity of busbars. Circuit breakers with this switching capacity must open the contacts and build up a high arc voltage at a time which is small in relation to the duration of a network period in order to sufficiently limit the short circuit current.