EP0188046A1 - Unité de dérivation - Google Patents

Unité de dérivation Download PDF

Info

Publication number
EP0188046A1
EP0188046A1 EP85300337A EP85300337A EP0188046A1 EP 0188046 A1 EP0188046 A1 EP 0188046A1 EP 85300337 A EP85300337 A EP 85300337A EP 85300337 A EP85300337 A EP 85300337A EP 0188046 A1 EP0188046 A1 EP 0188046A1
Authority
EP
European Patent Office
Prior art keywords
pass unit
residual current
rcd
current device
electrically
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Withdrawn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
EP85300337A
Other languages
German (de)
English (en)
Inventor
Michael Ellis
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.)
REDSURE ELP Ltd
Original Assignee
REDSURE ELP Ltd
Imperial Chemical Industries Ltd
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
Priority to GB838328136A priority Critical patent/GB8328136D0/en
Priority to GB08425098A priority patent/GB2149590B/en
Application filed by REDSURE ELP Ltd, Imperial Chemical Industries Ltd filed Critical REDSURE ELP Ltd
Priority to EP85300337A priority patent/EP0188046A1/fr
Publication of EP0188046A1 publication Critical patent/EP0188046A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/18—End pieces terminating in a probe
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted

Definitions

  • An RCD is designed to detect any imbalance between the current in the "live” line and that in the "neutral” line of a circuit. Such an imbalance is normally due to current leaking to earth, and to safeguard against such earth leakage being through a human body, the RCD is designed to break the circuit very quickly, typically in the order of 20 milliseconds, following detection of the current imbalance.
  • the earth loop impedance test When a new electrical installation is completed and commissioned, one of the tests that is done to establish the integrity of the earth circuit is the earth loop impedance test.
  • This test involves plugging a testmeter into a socket in the circuit under test, and, using a specially designed feature of the meter, current is allowed to pass from the live pin to the neutral pin of the socket. A simultaneous computation of voltage and current gives a reading on the meter of the earth loop inpedance in ohms.
  • the circuit under test includes an RCD
  • the testing procedure has the effect of artifically creating a fault in the circuit, which is sensed by the RCD, and the trip-out of the RCD breaks the circuit before a reading can be obtained on the meter. Tt is therefore impossible to carry out the earth loop impedance test in the normal manner, and to do the test properly, the RCD has to be physically removed, and replaced by a link, in order for the circuit to remain live during the test.
  • Removing RCD's, replacing them with links, performing the earth loop impedance test, removing the links and replacing the RCD's is a time consuming and inconvenient procedure, which is preferably avoided if possible.
  • One alternative procedure is to by pass the RCD for the period of the test, using a short, insulated lead with a heavy duty "crocodile" clip at each end, to connect the imput and output terminals of the RCD.
  • the use of such simple connectors is clearly, in itself, a somewhat hazardous procedure, and the present invention provides a completely safe and convenient device for bypassing an RCD while the earth loop impedance test is carried out.
  • a by-pass unit for a residual current device comprising a rigid, electrically-insulating body, adapted for releasably secure attachment to a residual current device and incorporating within the body one or more electrical conductors which are inaccessible to touch when the by-pass unit is attached to the residual current device, and are adapted to safely electrically connect respective input and output terminals of the residual current device.
  • the by-pass unit includes a screw or screws which is or are adapted to co-operate with the like-threaded sockets on the RCD, which in normal use secure a protective cover thereto, thus enabling the by-pass unit to be easily releasably secured to the RCD.
  • each conductor of the by-pass unit comprises a linear bar or strap conductor bearing essentially perpendicularly at either end a spring-loaded terminal, adapted to contact electrically with the respective input and output terminals of an RCD.
  • the by-pass unit is generally U-shaped, and is adapted to fit closely over the projecting body part of an RCD. It is also convenient for the insulating body of the by-pass unit to be formed in two parts, enabling the bar conductors to be sandwiched between them. The spring-loaded terminals are accommodated in appropriate bores within the two "legs" of the U-shaped body.
  • the insulating body of the by-pass unit be fabricated of plastics insulating material, for example polyvinyl chloride, poly(methyl methacrylate), or polypropylene, and that the conductors be of copper, brass or other conventional electrically conducting metallic material.
  • the by-pass unit comprises:
  • the by-pass unit is assembled by placing a conductor (1) in each channel (11 to 14) of the cover plate (10), placing the U-shaped member over the terminal posts and terminal caps so that they are accommodated in the bores (24-31) and securing the U-shaped member to the cover plate with an appropriate adhesive.
  • the protective covers are first removed from the terminal connections of the RCD, and the by-pass unit according to the present invention is secured over the body of the RCD (60), by screwing the screws (40) into the threaded sockets (63) of the RCD which in normal use secure the protective covers thereto, thus electrically connecting each pair of imput and output terminals (61,62) of the RCD through a conductor (1) of the by-pass unit.
  • the RCD is then effectively by- passed, and the earth loop impedance test can be carried out in normal manner.
  • the by-pass unit is unscrewed from the RCD, and the protective covers are replaced, so that the RCD is then again capable of performing its intended function.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
EP85300337A 1983-10-20 1985-01-17 Unité de dérivation Withdrawn EP0188046A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB838328136A GB8328136D0 (en) 1983-10-20 1983-10-20 By-pass unit
GB08425098A GB2149590B (en) 1983-10-20 1984-10-04 By-pass unit
EP85300337A EP0188046A1 (fr) 1983-10-20 1985-01-17 Unité de dérivation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838328136A GB8328136D0 (en) 1983-10-20 1983-10-20 By-pass unit
EP85300337A EP0188046A1 (fr) 1983-10-20 1985-01-17 Unité de dérivation

Publications (1)

Publication Number Publication Date
EP0188046A1 true EP0188046A1 (fr) 1986-07-23

Family

ID=26098096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85300337A Withdrawn EP0188046A1 (fr) 1983-10-20 1985-01-17 Unité de dérivation

Country Status (2)

Country Link
EP (1) EP0188046A1 (fr)
GB (2) GB8328136D0 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409640A2 (fr) * 1989-07-21 1991-01-23 Nec Corporation Assemblage de connecteur pour dispositifs électroniques
DE4306231A1 (de) * 1993-02-27 1994-09-08 Abb Patent Gmbh Kontaktanordnung für einen Fehlerstromschutzschalter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369088A (en) * 1966-07-27 1968-02-13 Murray Mfg Corp Electric meter by-pass arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB973983A (en) * 1962-12-22 1964-11-04 Automatic Telephone & Elect Improvements in or relating to electrical connecting arrangements
FR2393448A1 (fr) * 1976-08-18 1978-12-29 Wago Kontakttechnik Gmbh Appareil electrique de branchement ou de connexion

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369088A (en) * 1966-07-27 1968-02-13 Murray Mfg Corp Electric meter by-pass arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DER ELEKTROMEISTER + DEUTSCHES ELEKTROHANDWERK, no. 8, 1975, pages 487-493; E. POINTNER: "Prüfen elektrischer Anlagen" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409640A2 (fr) * 1989-07-21 1991-01-23 Nec Corporation Assemblage de connecteur pour dispositifs électroniques
EP0409640A3 (en) * 1989-07-21 1991-09-18 Nec Corporation Connector assembly for electronic devices
AU632834B2 (en) * 1989-07-21 1993-01-14 Nec Corporation Connector assembly for electronic devices
DE4306231A1 (de) * 1993-02-27 1994-09-08 Abb Patent Gmbh Kontaktanordnung für einen Fehlerstromschutzschalter

Also Published As

Publication number Publication date
GB2149590B (en) 1987-08-19
GB2149590A (en) 1985-06-12
GB8328136D0 (en) 1983-11-23
GB8425098D0 (en) 1984-11-07

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19870102

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: REDSURE ELP LIMITED

17Q First examination report despatched

Effective date: 19881028

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900606

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ELLIS, MICHAEL