GB469143A - Improvements in or relating to earth leakage protective means for electrical apparatus - Google Patents

Improvements in or relating to earth leakage protective means for electrical apparatus

Info

Publication number
GB469143A
GB469143A GB702936A GB702936A GB469143A GB 469143 A GB469143 A GB 469143A GB 702936 A GB702936 A GB 702936A GB 702936 A GB702936 A GB 702936A GB 469143 A GB469143 A GB 469143A
Authority
GB
United Kingdom
Prior art keywords
fuse
supply
current transformer
primary
heating coil
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
GB702936A
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.)
GEORGE FREDERICK CHELLIS
Original Assignee
GEORGE FREDERICK CHELLIS
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 GEORGE FREDERICK CHELLIS filed Critical GEORGE FREDERICK CHELLIS
Priority to GB702936A priority Critical patent/GB469143A/en
Publication of GB469143A publication Critical patent/GB469143A/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
    • H02H3/08—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 excess current
    • H02H3/10—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 excess current additionally responsive to some other abnormal electrical conditions
    • H02H3/105—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 excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth

Abstract

469,143. Protective cut-out arrangements. CHELLIS, G. F. March 9, 1936, No. 7029. [Class 38 (v)] [Also in Group XXXVI] The fuse 5 in the unearthed line of the supply to the apparatus 3 is adapted, when the insulation of 3 breaks down, to be melted by a heating coil 7, which is energized by the secondary 6 of a variable-ratio current transformer having its primary in the earthing conductor 4 of the apparatus-frame. The wire 5 is surrounded by a refractory insulating tube 8 on which the heating coil 7 is wound, the heater being covered by layers of asbestos tape or an asbestos jacket 9. With a polyphase supply, the current transformer has three secondaries, one for each phase. The fuse may, alternatively, open the holding circuit of a breaker, and may be replaced by a fluid capsule or bimetal strip controlling a holding or trip circuit. The Specification refers also to interrupting the whole of the supply from a power transformer to a faulty distribution system, one terminal of the secondary of the power transformer being earthed through the primary of the current transformer, and the other terminal being connected to the line carrying the fuse.
GB702936A 1936-03-09 1936-03-09 Improvements in or relating to earth leakage protective means for electrical apparatus Expired GB469143A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB702936A GB469143A (en) 1936-03-09 1936-03-09 Improvements in or relating to earth leakage protective means for electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB702936A GB469143A (en) 1936-03-09 1936-03-09 Improvements in or relating to earth leakage protective means for electrical apparatus

Publications (1)

Publication Number Publication Date
GB469143A true GB469143A (en) 1937-07-20

Family

ID=9825275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB702936A Expired GB469143A (en) 1936-03-09 1936-03-09 Improvements in or relating to earth leakage protective means for electrical apparatus

Country Status (1)

Country Link
GB (1) GB469143A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595251A (en) * 1948-02-26 1952-05-06 Us Interior Short-circuiting contactor for direct-current circuits
US2842718A (en) * 1953-09-28 1958-07-08 Ohio Brass Co Circuit interrupters
US3064161A (en) * 1957-11-18 1962-11-13 Tor A Albertsson Electric safety means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595251A (en) * 1948-02-26 1952-05-06 Us Interior Short-circuiting contactor for direct-current circuits
US2842718A (en) * 1953-09-28 1958-07-08 Ohio Brass Co Circuit interrupters
US3064161A (en) * 1957-11-18 1962-11-13 Tor A Albertsson Electric safety means

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