EP2503585A1 - An extender for placement of a roller fuse in contact of current conductive path of electric switching and/or fuse device of high or very high voltage - Google Patents

An extender for placement of a roller fuse in contact of current conductive path of electric switching and/or fuse device of high or very high voltage Download PDF

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Publication number
EP2503585A1
EP2503585A1 EP11006159A EP11006159A EP2503585A1 EP 2503585 A1 EP2503585 A1 EP 2503585A1 EP 11006159 A EP11006159 A EP 11006159A EP 11006159 A EP11006159 A EP 11006159A EP 2503585 A1 EP2503585 A1 EP 2503585A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
internal
fixing part
external
extender
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.)
Withdrawn
Application number
EP11006159A
Other languages
German (de)
English (en)
French (fr)
Inventor
Stanislav Bartos
Dalibor Bartos
Josef Halamícek
Jaroslav Ottich
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.)
DRIBO spol sro
Original Assignee
DRIBO spol sro
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 DRIBO spol sro filed Critical DRIBO spol sro
Publication of EP2503585A1 publication Critical patent/EP2503585A1/en
Withdrawn legal-status Critical Current

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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
    • H01H85/22—Intermediate or auxiliary parts for carrying, holding, or retaining fuse, co-operating with base or fixed holder, and removable therefrom for renewing the fuse
    • 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
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H2085/2065—Bases for supporting the fuse; Separate parts thereof with base contacts adapted or adaptable to fuses of different lenghts; bases with self-aligning contacts; intermediate adaptation pieces
    • 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
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H2085/207—Bases adapted to fuses with different end contacts or to other components, e.g. circuit breakers; intermediate adaptation pieces
    • 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
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/042—General constructions or structure of high voltage fuses, i.e. above 1000 V
    • 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
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H85/202—Bases for supporting the fuse; Separate parts thereof for fuses with ferrule type end contacts

Definitions

  • the invention relates an extender for placement of a cylindrical fuse in contact of current conductive path of electric switching and/or fuse device of high or very high voltage, e.g. terminator, disconnector, fuse holder, fuse receptacle etc.
  • the fuses with dimensions defined in IEC 60282-1 and differentiated by the voltage value are used for practical line protection of high or very high voltage grids.
  • fuses of different dimensions and types were used, particularly with longer length and larger diameters of the fuse terminals.
  • extenders for extension of the fuse length and their fitting to a longer current conducting path with identical diameter of contacts e.g. extender for extension of fuses for 12kV and their implementation in 24kV devices.
  • this is a cylinder body fitted on terminal of the fuse, the diameter of which is reduced outside the fuse with the use of fitting so that the diameter identical to the fuse terminal is achieved and to fix it to a remote device contact.
  • extenders do not deal with the technical troubles of installations of shorter fuses where the contacts are of diameter different from the fuse terminals.
  • the purpose of the invention is formation of a universal extender designed for installation of a shorter cylinder fuse of smaller diameter to the contact of the current conductive path adapted to older fuses of longer length and larger diameter, which would remove all these imperfections and deal with less often situation where a stronger fuse must be installed in a smaller contact.
  • the extender includes a fixing part fitted with at least one outer connection part adapted to electrically conductive fitting of fixing part in the contact and a sleeve fitted with at least one contact part adapted to electrically conductive fitting of the sleeve to the end of the cylindrical fuse.
  • the external dimension of the fixing part defined by the external contact part(s) differs from internal bore diameter of the sleeve defined by the contact part(s).
  • the sleeve and fixing part offer different connection methods: fixed, demountable or movable, e.g. by sliding.
  • the fixing part may, but docs not have to, be identical to the fuse terminal as regards shape, i.e.
  • the sleeve may offer a wide range of shape variants and construction designs.
  • the external diameter of the fixing part is larger than the inner bore diameter of the sleeve and therefore, the extender is designed for installation of a shorter cylindrical fuse of smaller diameter to the contacts of the current conductive path designed for older fuses of longer length and larger diameter, which corresponds to vast majority of known devices.
  • the dimensions of the extender are opposite and therefore, the external diameter of the fixing part is smaller than the inner bore diameter of the sleeve, i.e. the extender is designed for installation of a shorter cylindrical fuse of smaller diameter to the contacts of the current conductive path designed for older fuses of longer length and larger diameter.
  • the term “external dimension of the fixing part” refers to both external diameter or similar dimension of in fact rotary part with at least one contact surface and diameter or similar dimension of a case, usually circumscribed circle or other curve around multiple contact points that form the fixing part.
  • inner bore diameter of the sleeve refers to internal diameter or similar dimension of in fact rotary part with at least one internal contact surface as well as internal distance between two opposite internal contact surfaces as well as diameter or similar dimension of a circle or a different curve inscribed among more internal contact parts of the sleeve.
  • the term “contact part” refers especially to the parts of internal and external cylindrical surfaces, as well as explicitly any other construction elements with shapes formed by surfaces and parts of the surfaces, sets of points or discrete points the purpose of which is formation of electric-conductive link of two components.
  • the sleeve is designed to allow change to inner bore diameter and fitted with a clamping jig to clamp the sleeve to the terminal of cylindrical fuse by reducing the inner bore diameter.
  • Production of pressure is favourable in cases where construction design of the sleeve alone would not allow for sufficiently strong link connection, electric conductivity, and low transient resistance.
  • the fixing part consists of a cylindrical body shell of which forms external contact surface. Strictly speaking, the fixing part of this design corresponds to the original fuse terminal and fits easily in the contact of the current conducting path designed for this shape as regards diameter and shape.
  • the extender may be produced of a tube or as an extrusion from metal sheet to reduce production costs for the extender considerably.
  • the sleeve consists, in fact, of a cylindrical body the shell of which is formed by alternating arches and inner arches created as extrusions of external arches, whereas tops of the internal arches touching the terminal of the cylindrical fuse form internal contact surfaces and define the internal bore diameter of the sleeve as diameter of the circle inscribed among tops of the internal arches.
  • the clamping jig consists of either shaped gripper spring or screwing clamp that snugs the sleeve.
  • Both favourable embodiments of the clamping jigs are sufficiently effective and easy for handling; in addition, a hosc clamp is favourable because this is a purchased part, achieves higher contact pressure and retains alignment of the sleeve with the fuse terminal in a better way, which is beneficial especially for the fuses with a dispatching pin.
  • the benefits of the extender according to this invention are especially that they allow simple use of modem, cheaper and shorter fuses of smaller diameter universally for all switching and fuse devices designed for longer fuses of larger diameter without any modifications of these devices.
  • Installation of the fuse with the extender is usually possible under voltage without any shutdown.
  • the shutdown time is very short and it counts to minutes compared to time required for modification of the devices counting to several hours.
  • Fig. 1 shows side profile of the extender
  • Fig. 2 shows cross-section of the extender in A-A plane
  • Fig. 3 shows ground plan of the extender
  • Fig. 4 shows panoramic axonometric view on the extender
  • Fig. 5 shows panoramic axonometric view on the extender with clamping jig consisting of gripper spring
  • Fig. 6 shows panoramic axonometric view on the extender with clamping jig consisting of the hose clamp
  • Fig. 7 shows panoramic axonometric view on part of the fuse with the extender in contact with the current conducting path
  • Fig. 1 shows side profile of the extender
  • Fig. 2 shows cross-section of the extender in A-A plane
  • Fig. 3 shows ground plan of the extender
  • Fig. 4 shows panoramic axonometric view on the extender
  • Fig. 5 shows panoramic axonometric view on the extender with clamping jig consisting of gripper spring
  • FIG. 8 shows panoramic axonometric view on the full current conducting path with the fuse fitted with the extenders on both ends and located in the contacts
  • Fig. 9 shows the cross section of the extender with the insert with movable small piston and fitted on the fuse terminal with the dispatching pin
  • Fig. 10 shows the extender in longitudinal cross-section on the interface of the internal and external arc
  • Fig. 11 shows the extender with protruding external contact parts
  • Fig. 12 shows the extender with the sleeve tightened with the pin and spring
  • Fig. 13 shows the extender with the sleeve installed inside the fixing part
  • Fig. 14 shows the cylindrical extender with the sleeve consisting of the shell trim of the fixing part
  • Fig. 15 shows the cross-section of the extender according to Fig. 14 .
  • Fig. 16 shows the extender consisting of two cylindrical surfaces
  • Fig. 17 shows tube longitudinally-divided extender with the sleeve tightened with the tightening bolts
  • Fig. 18 shows the extender with bayonet-installed and axially shifted sleeve.
  • Fig. 1 to Fig. 9 shows example of the extender 1 embodiment, advantageously created from a tube or as an extrusion from metal sheet from current conducting copper alloy. Other material suitable from the electric properties and target operation equipment point of view may be used.
  • the extender 1 forms an integral extrusion where the fixing part 5 produced as a tube passes to the sleeve 7 via the bridge 10 .
  • the fixing part 5 the contact surface 6 of which consists of the tube shell, which defines the external dimension, here D diameter of the fixing part 5 , is designed for installation to the contact 3 of the current conducting path 4 of the relevant device.
  • the sleeves 7 of two extenders 1 are installed to the terminals 17 of the cylindrical fuse 2 before the fuse 2 and the extenders 1 are installed in the contacts 3 of the current conducting path 4 .
  • the sleeve 7 is a body of roughly cylindrical shape the shell of which consists of alternating three external arches 11 and three internal arches 12 , whereas the tops of the internal arches 12 make contact with the terminals 17 of the cylindrical fuse 2 and they form internal contact surfaces 8 that define the internal bore diameter d of the sleeve 7 that is smaller than the external diameter D of the fixing part 5 .
  • the bore diameter d indicates diameter of the circle inscribed among the tops of the internal arches 12 .
  • the whole sleeve 7 may be favourably made of one tube semi-finished product with the fixing part 5 with the use of cuts 18 , which separate individual parts of the sleeve 7 from the fixing part 5 except for the bridge 10 forming the connection component.
  • One larger arc 11 is terminated by longitudinal section 13 made in the extender axis direction 1 along the length of the external arc 11 .
  • the section 13 allows tightening of the sleeve 7 and thereby reducing of its internal bore diameter d , which is important both from the point of view of installation and conductivity of the extender 1 as well as achieving of alignment of the extenders 1 and the fuse 2 .
  • the clamping jig 9 used for reduction may advantageously be formed from the gripper spring as shown on Fig. 5 and Fig. 8 or screwing clamp shown on Fig. 6 and 7 .
  • the clamping jig 9 may, however, have a wide range of examples of embodiment not shown here, for example clamps, clamping jaws made of a single piece or a double piece, pre-stressed springs and sleeves of various design, clamping screw joints, collets, rubber segments, strips and other binding components etc.
  • Fig. 9 shows special example of the extender 1 where the fixing part 5 houses the insert 14 with the movable small piston 15 .
  • This insert 14 is intended for the fuses 2 fitted with the dispatching pin 16 , which is activated for forward movement when the fuse 2 melts.
  • the dispatching pin 16 pushes on the small piston 15 , which activates a device contact not displayed herein with mechanically accumulated energy, which disconnects all device phases at the same, in its ejected position inside the extender 1 .
  • the fixing part 5 may be of different shapes and number of the external contact surfaces 6 , which do not have to form a continuous cylindrical surface but they must be capable of being fixed in the contact 3 .
  • the sleeve 7 has more design options. It may be connected with the fixing part 5 with movable option, e.g. sliding to cover a wider range of the fuse lengths. It may be connected with the fixing part 5 as demountable option with either fixed or variable length. It may have a different number of internal contact surfaces 8 that may have different shape or design.
  • the sleeve 7 may be of shape, among other, identical to the contact shape 3 but of smaller diameter. In each case, it must be able to fit to a terminal 17 of the fuse 2 .
  • Fig. 10 to Fig. 18 shows some other potential embodiments of the extender 1.
  • the extender according to the invention can be used for installation of the cylindrical fuse in contact of the current conducting path of the electric switching and/or protection device of very high voltage or high voltage where the contacts are arranged for installation of longer fuse of either higher or smaller terminal diameter.

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  • Fuses (AREA)
EP11006159A 2011-03-21 2011-07-27 An extender for placement of a roller fuse in contact of current conductive path of electric switching and/or fuse device of high or very high voltage Withdrawn EP2503585A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ20110143A CZ2011143A3 (cs) 2011-03-21 2011-03-21 Nástavec pro uložení válcové pojistky do kontaktu proudovodné dráhy elektrického spínacího a/nebo pojistkového prístroje vysokého nebo velmi vysokého napetí

Publications (1)

Publication Number Publication Date
EP2503585A1 true EP2503585A1 (en) 2012-09-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11006159A Withdrawn EP2503585A1 (en) 2011-03-21 2011-07-27 An extender for placement of a roller fuse in contact of current conductive path of electric switching and/or fuse device of high or very high voltage

Country Status (2)

Country Link
EP (1) EP2503585A1 (cs)
CZ (1) CZ2011143A3 (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113436884A (zh) * 2021-07-02 2021-09-24 广东电网有限责任公司 一种高压电容器保险丝自动更换设备
EP4163947A1 (en) * 2021-10-11 2023-04-12 Schneider Electric Industries SAS Fuse device, inflatable ring network cabinet and environment-friendly switch cabinet including same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950195A (en) * 1988-05-16 1990-08-21 Gould, Inc. Cartridge fuse terminal adapter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950195A (en) * 1988-05-16 1990-08-21 Gould, Inc. Cartridge fuse terminal adapter

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Miscellaneous Products - Fuse Reducers", 5 December 2006 (2006-12-05), pages 157, XP002678236, Retrieved from the Internet <URL:http://www.littelfuse.com/data/en/Data_sheets/lru.pdf> [retrieved on 20120619] *
ANONYMOUS: "Online Catalog - Fuse Reducers", 25 May 2010 (2010-05-25), pages 1, XP002678235, Retrieved from the Internet <URL:http://web.archive.org/web/20100525130915/http://www.grainger.com/Grainger/fuse-reducers/fuses/electrical/ecatalog/N-8cz?op=search&sst=subset> [retrieved on 20120619] *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113436884A (zh) * 2021-07-02 2021-09-24 广东电网有限责任公司 一种高压电容器保险丝自动更换设备
CN113436884B (zh) * 2021-07-02 2022-04-12 广东电网有限责任公司 一种高压电容器保险丝自动更换设备
EP4163947A1 (en) * 2021-10-11 2023-04-12 Schneider Electric Industries SAS Fuse device, inflatable ring network cabinet and environment-friendly switch cabinet including same

Also Published As

Publication number Publication date
CZ2011143A3 (cs) 2012-10-03

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