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EP0552066A1 - Isolated mains socket and mains circuit arrangement - Google Patents

Isolated mains socket and mains circuit arrangement Download PDF

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Publication number
EP0552066A1
EP0552066A1 EP93300305A EP93300305A EP0552066A1 EP 0552066 A1 EP0552066 A1 EP 0552066A1 EP 93300305 A EP93300305 A EP 93300305A EP 93300305 A EP93300305 A EP 93300305A EP 0552066 A1 EP0552066 A1 EP 0552066A1
Authority
EP
European Patent Office
Prior art keywords
mains
primary winding
transformer
isolated
circuit arrangement
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Withdrawn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
EP93300305A
Other languages
German (de)
French (fr)
Inventor
Tai-Her Yang
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0552066A1 publication Critical patent/EP0552066A1/en
Withdrawn legal-status Critical Current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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/6608—Structural association with built-in electrical component with built-in single component
    • H01R13/6633—Structural association with built-in electrical component with built-in single component with inductive component, e.g. transformer

Definitions

  • the present invention relates to an electrically isolated mains socket and to a mains circuit arrangement having mains sockets connected to an electrically isolated secondary winding of a transformer.
  • the present invention provides an electrically isolated mains socket comprising a transformer having a primary winding arranged to be connected across the mains supply and an ungrounded secondary winding which is isolated from the primary winding and connected to the socket contacts, said socket contacts being located and dimensioned to receive a mains plug.
  • the transformer has a grounded core and/or a grounded casing.
  • the invention also provides a mains circuit arrangement comprising a transformer having a primary winding connected across the incoming mains conductors and an ungrounded secondary winding which is isolated from the primary winding and connected to one or more domestic mains sockets.
  • a transformer having a primary winding connected across the incoming mains conductors and an ungrounded secondary winding which is isolated from the primary winding and connected to one or more domestic mains sockets.
  • the transformer has a grounded core and/or a grounded casing.
  • Figure 1 is a schematic diagram of a mains circuit arrangement in accordance with the invention.
  • the arrangement comprises a 1:1 transformer having an earthed core (101) and a primary winding (102) connected to the incoming mains supply via a safety cutout device (104) which may be a residual current circuit breaker for example.
  • a safety cutout device (104) which may be a residual current circuit breaker for example.
  • One of the conductors connected to primary winding (102) may be earthed (not shown).
  • the secondary winding (103) is connected to a plurality of mains sockets (105-1, 105-27-8, 105-n).
  • the transformer may be integral with a mains socket.
  • the safety cutout device (104) may also be either separate from or integral with the or each mains socket.
  • the or each transformer may have a metal casing (not shown) which may be earthed in addition to or as an alternative to earthing the core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

An electrically isolated mains circuit arrangement comprises a 1:1 transformer having a primary winding connected across the incoming mains conductors and an ungrounded secondary winding (103) which is isolated from the primary winding and connected to one or more domestic mains sockets (105-1 .... ), (105-n). Since the secondary circuit is unearthed there is no danger of an electric shock and since the core (101) or alternatively, the casing of the transformer is earthed the circuit arrangement is also protected against lightning.

Description

  • The present invention relates to an electrically isolated mains socket and to a mains circuit arrangement having mains sockets connected to an electrically isolated secondary winding of a transformer.
  • In a conventional transmission and distribution system one of the conductors is normally grounded in order to provide protection against lightning. As a result, however, any user who touches a live mains conductor is liable to receive an electric shock.
  • Such a danger is particularly liable to arise in a bathroom.
  • The present invention provides an electrically isolated mains socket comprising a transformer having a primary winding arranged to be connected across the mains supply and an ungrounded secondary winding which is isolated from the primary winding and connected to the socket contacts, said socket contacts being located and dimensioned to receive a mains plug. Preferably the transformer has a grounded core and/or a grounded casing.
  • The invention also provides a mains circuit arrangement comprising a transformer having a primary winding connected across the incoming mains conductors and an ungrounded secondary winding which is isolated from the primary winding and connected to one or more domestic mains sockets. Preferably the transformer has a grounded core and/or a grounded casing.
  • A preferred embodiment of the invention is described below by way of example only with reference to Figure 1, which is a schematic diagram of a mains circuit arrangement in accordance with the invention.
  • The arrangement comprises a 1:1 transformer having an earthed core (101) and a primary winding (102) connected to the incoming mains supply via a safety cutout device (104) which may be a residual current circuit breaker for example. One of the conductors connected to primary winding (102) may be earthed (not shown). The secondary winding (103) is connected to a plurality of mains sockets (105-1, 105-2....., 105-n).
  • In an alternative embodiment, the transformer may be integral with a mains socket. The safety cutout device (104) may also be either separate from or integral with the or each mains socket.
  • The or each transformer may have a metal casing (not shown) which may be earthed in addition to or as an alternative to earthing the core.

Claims (4)

  1. An electrically isolated mains socket comprising a transformer having a primary winding (102) arranged to be connected across the mains supply and an ungrounded secondary winding (103) which is isolated from the primary winding and connected to the socket contacts, said socket contacts being located and dimensioned to receive a mains plug, characterised in that the transformer has a grounded core and/or a grounded casing.
  2. An electrically isolated mains socket according to claim 1, further comprising a safety cut-out device connected to said primary winding (102).
  3. A mains circuit arrangement comprising a transformer having a primary winding (102) connected across the incoming mains conductors and an ungrounded secondary winding (103) which is isolated from the primary winding and connected to one or more domestic mains sockets (105-1, 105-2...., 105-n), characterised in that the transformer has a grounded core (101) and/or a grounded casing.
  4. A mains circuit arrangement according to claim 3, further comprising a safety cut-out device connected to said primary winding (101).
EP93300305A 1992-01-17 1993-01-18 Isolated mains socket and mains circuit arrangement Withdrawn EP0552066A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9201007 1992-01-17
GB929201007A GB9201007D0 (en) 1992-01-17 1992-01-17 Isolated inside room secure socket

Publications (1)

Publication Number Publication Date
EP0552066A1 true EP0552066A1 (en) 1993-07-21

Family

ID=10708768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93300305A Withdrawn EP0552066A1 (en) 1992-01-17 1993-01-18 Isolated mains socket and mains circuit arrangement

Country Status (2)

Country Link
EP (1) EP0552066A1 (en)
GB (1) GB9201007D0 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6426617B1 (en) * 1999-09-28 2002-07-30 Rockwell Automation Technologies, Inc. Hall effect current sensor system packaging
US6528988B2 (en) 1999-09-30 2003-03-04 Rockwell Automation Technologies, Inc. Technique for programming a programmable device while coupled to another component in a circuit
CN109101089A (en) * 2018-08-10 2018-12-28 黄河科技学院 Computerized information socket anti-collision protection device
CN109215692A (en) * 2018-09-07 2019-01-15 黄河科技学院 Explosion-protection equipment for Computer Memory Unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2833969A1 (en) * 1978-08-03 1980-02-21 Dieter Mueller Aquarium light with fluorescent tube - is connected by cable to separate unit incorporating isolating transformer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2833969A1 (en) * 1978-08-03 1980-02-21 Dieter Mueller Aquarium light with fluorescent tube - is connected by cable to separate unit incorporating isolating transformer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J.WEINERT ET AL 'Einführung in VDE 0100 mit Fragen und Antworten' , H.STAM , KöLN DEUTSCHLAND *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6426617B1 (en) * 1999-09-28 2002-07-30 Rockwell Automation Technologies, Inc. Hall effect current sensor system packaging
US6611137B2 (en) 1999-09-28 2003-08-26 Steven T. Haensgen Hall effect current sensor system packaging
US6528988B2 (en) 1999-09-30 2003-03-04 Rockwell Automation Technologies, Inc. Technique for programming a programmable device while coupled to another component in a circuit
CN109101089A (en) * 2018-08-10 2018-12-28 黄河科技学院 Computerized information socket anti-collision protection device
CN109215692A (en) * 2018-09-07 2019-01-15 黄河科技学院 Explosion-protection equipment for Computer Memory Unit

Also Published As

Publication number Publication date
GB9201007D0 (en) 1992-03-11

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