GB514916A - Improvements in or relating to methods for the protection of electrical circuits and installations against short-circuit currents - Google Patents

Improvements in or relating to methods for the protection of electrical circuits and installations against short-circuit currents

Info

Publication number
GB514916A
GB514916A GB14887/38A GB1488738A GB514916A GB 514916 A GB514916 A GB 514916A GB 14887/38 A GB14887/38 A GB 14887/38A GB 1488738 A GB1488738 A GB 1488738A GB 514916 A GB514916 A GB 514916A
Authority
GB
United Kingdom
Prior art keywords
portions
fusible
against short
circuit currents
recesses
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
GB14887/38A
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 Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
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
Application filed by Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB514916A publication Critical patent/GB514916A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H2085/0225—Means for preventing discharge, e.g. corona ring

Landscapes

  • Fuses (AREA)

Abstract

514,916. Electric cut-outs. SIEMENSSCHUCKERTWERKE AKT.-GES. May 18, 1938, Nos. 14887 and 14888. Convention dates, May 25, 1937, and May 26, 1937. [Class 38 (i)] [Also in Group XXXVII] An electrical circuit is protected against short-circuit currents by means of a fuse in which a fusible element embedded in a granular arc-quenching medium is provided along its length with more readily fusible portions, the number of such portions being chosen so that the voltage drops at the ends of the arcs formed thereat, after a predetermined quenching period, is greater than the supply voltage but smaller than a dangerous voltage such as double the supply voltage. To make portions of the element more readily fusible, the cross-section is reduced by perforations or recesses as shown in Figs. 8 to 11. A number of sections 33 to 38, Fig. 14, may be furnished with recesses at their ends and welded together at these weakened points to form an element. The more readily fusible may increase or decrease in crosssection from the centre to the ends of the element. The element may be of copper galvanically coated with nickel and chromium.
GB14887/38A 1937-05-25 1938-05-18 Improvements in or relating to methods for the protection of electrical circuits and installations against short-circuit currents Expired GB514916A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE514916X 1937-05-25

Publications (1)

Publication Number Publication Date
GB514916A true GB514916A (en) 1939-11-21

Family

ID=6548797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14887/38A Expired GB514916A (en) 1937-05-25 1938-05-18 Improvements in or relating to methods for the protection of electrical circuits and installations against short-circuit currents

Country Status (1)

Country Link
GB (1) GB514916A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960589A (en) * 1959-01-30 1960-11-15 Chase Shawmut Co Electric fuses
GB2148626A (en) * 1983-10-18 1985-05-30 Marbourn Limited Electrical fuselink

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960589A (en) * 1959-01-30 1960-11-15 Chase Shawmut Co Electric fuses
GB2148626A (en) * 1983-10-18 1985-05-30 Marbourn Limited Electrical fuselink

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