GB580787A - Improvements in and relating to electrical earth leakage devices for electrical apparatus - Google Patents

Improvements in and relating to electrical earth leakage devices for electrical apparatus

Info

Publication number
GB580787A
GB580787A GB14178/44A GB1417844A GB580787A GB 580787 A GB580787 A GB 580787A GB 14178/44 A GB14178/44 A GB 14178/44A GB 1417844 A GB1417844 A GB 1417844A GB 580787 A GB580787 A GB 580787A
Authority
GB
United Kingdom
Prior art keywords
electrical
winding
frame
armature
relating
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
GB14178/44A
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.)
RECORD ELECTRICAL CO Ltd
STEPHEN JOHN WIMSETT
Original Assignee
RECORD ELECTRICAL CO Ltd
STEPHEN JOHN WIMSETT
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 RECORD ELECTRICAL CO Ltd, STEPHEN JOHN WIMSETT filed Critical RECORD ELECTRICAL CO Ltd
Priority to GB14178/44A priority Critical patent/GB580787A/en
Publication of GB580787A publication Critical patent/GB580787A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
    • H02H3/162—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass for ac systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)

Abstract

580,787. Protective cut-out arrangements ; testing for faults. WIMSETT, S. J., and RECORD ELECTRICAL CO., Ltd. July 25. 1944, No. 14178. [Class 38 (v)] [Also in Group XXXVI] On the occurrence of a leakage to the frame 19 of electrical apparatus, a winding 5 comprising many turns of fine wire connected to earth E, closes contacts 7, 12 and connects the frame 19 to neutral through a winding 6 of few turns of heavy wire on the same iron core as 5, so permitting an increased current to flow long enough to blow a fuse 20 in the main circuit. When attracted, the armature 8 releases a drop indicator 14 which is visible through a window in the casing and resettable by press-button 15. A vibrating reed 9 gives audible indication of a fault whch is insufficient to operate armature 8.
GB14178/44A 1944-07-25 1944-07-25 Improvements in and relating to electrical earth leakage devices for electrical apparatus Expired GB580787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB14178/44A GB580787A (en) 1944-07-25 1944-07-25 Improvements in and relating to electrical earth leakage devices for electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14178/44A GB580787A (en) 1944-07-25 1944-07-25 Improvements in and relating to electrical earth leakage devices for electrical apparatus

Publications (1)

Publication Number Publication Date
GB580787A true GB580787A (en) 1946-09-19

Family

ID=10036414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14178/44A Expired GB580787A (en) 1944-07-25 1944-07-25 Improvements in and relating to electrical earth leakage devices for electrical apparatus

Country Status (1)

Country Link
GB (1) GB580787A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047775A (en) * 1956-07-23 1962-07-31 Leriche Marie Madelein Therese Protective device for electrical appliance
US3234316A (en) * 1963-03-20 1966-02-08 Electric Furnace Co Device for detecting grounds in electric furnaces
US5336999A (en) * 1989-08-08 1994-08-09 British Technology Group Limited Echo planar imaging using 180 degrees pulses

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047775A (en) * 1956-07-23 1962-07-31 Leriche Marie Madelein Therese Protective device for electrical appliance
US3234316A (en) * 1963-03-20 1966-02-08 Electric Furnace Co Device for detecting grounds in electric furnaces
US5336999A (en) * 1989-08-08 1994-08-09 British Technology Group Limited Echo planar imaging using 180 degrees pulses

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