GB551090A - Improvements in electric cut-out or protective systems with automatic circuit breakers - Google Patents

Improvements in electric cut-out or protective systems with automatic circuit breakers

Info

Publication number
GB551090A
GB551090A GB1201441A GB1201441A GB551090A GB 551090 A GB551090 A GB 551090A GB 1201441 A GB1201441 A GB 1201441A GB 1201441 A GB1201441 A GB 1201441A GB 551090 A GB551090 A GB 551090A
Authority
GB
United Kingdom
Prior art keywords
winding
connection
metal
supply
neutral
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
GB1201441A
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.)
FOSTER TRANSFORMERS AND SWITCH
Original Assignee
FOSTER TRANSFORMERS AND SWITCH
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 FOSTER TRANSFORMERS AND SWITCH filed Critical FOSTER TRANSFORMERS AND SWITCH
Priority to GB1201441A priority Critical patent/GB551090A/en
Publication of GB551090A publication Critical patent/GB551090A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
    • H02H5/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to mechanical injury, e.g. rupture of line, breakage of earth connection responsive to deterioration or interruption of earth connection

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

551,090. Protective. cut-out arrangements. BAGNALL, R. I., and FOSTER TRANSFORMERS & SWITCHGEAR, Ltd. Sept. 19, 1941, No. 12014. [Class 38 (v)] The supply to a portable apparatus is interrupted, on failure of the safety earthing connection 8 from the exposed metal 7 of the apparatus, by the unbalancing of normally-balanced trip coils 5, 6, energized from an additional secondary 3 on the supply transformer, the coil 6 having an energizing circuit comprising the connection 8, an additional connection to earth 9 near that 8, and the lead between the junction point of 3 with the normal secondary and the exposed metal to which one end of the apparatus-winding 10 also is connected. The connection 8 may consist of a core in the flexible supply cable and an overload coil 11 for the main circuit-breaker 4 may be provided. In modifications, winding 3 may have a separate primary in parallel to that of the main transformer, Fig. 2 (not shown). In polyphase arrangements, the winding 3 may be connected at one end to the neutral of the secondary of the supply transformer, which neutral is also connected to the metal 7, Fig. 3 (not shown), or, where one of the three-phase lines is itself at earth potential, the winding 3 may be connected at one end to that line, which is connected to the metal 7 and so to the outer end of the corresponding winding of the apparatus. Fig. 4 (not shown).
GB1201441A 1941-09-19 1941-09-19 Improvements in electric cut-out or protective systems with automatic circuit breakers Expired GB551090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1201441A GB551090A (en) 1941-09-19 1941-09-19 Improvements in electric cut-out or protective systems with automatic circuit breakers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1201441A GB551090A (en) 1941-09-19 1941-09-19 Improvements in electric cut-out or protective systems with automatic circuit breakers

Publications (1)

Publication Number Publication Date
GB551090A true GB551090A (en) 1943-02-08

Family

ID=9996852

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1201441A Expired GB551090A (en) 1941-09-19 1941-09-19 Improvements in electric cut-out or protective systems with automatic circuit breakers

Country Status (1)

Country Link
GB (1) GB551090A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340433A (en) * 1965-02-15 1967-09-05 Harry G Almquist Safety cut-off for electrical power operated hand tools
GB2128047A (en) * 1982-10-05 1984-04-18 Northern Eng Ind Earth leakage monitor and earth proving apparatus
GB2142493A (en) * 1983-06-27 1985-01-16 Simco Co Inc Ground tether continuity monitor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3340433A (en) * 1965-02-15 1967-09-05 Harry G Almquist Safety cut-off for electrical power operated hand tools
GB2128047A (en) * 1982-10-05 1984-04-18 Northern Eng Ind Earth leakage monitor and earth proving apparatus
GB2142493A (en) * 1983-06-27 1985-01-16 Simco Co Inc Ground tether continuity monitor

Similar Documents

Publication Publication Date Title
GB1236082A (en) A system of overload protection by using superconducting conductors
GB1214678A (en) An improved electrical socket outlet
GB551090A (en) Improvements in electric cut-out or protective systems with automatic circuit breakers
GB1442900A (en) Ground fault interrupter circuit with excited secondary winding on differential transformer
US1988121A (en) Protective means for delta connected transmission lines
GB549679A (en) Improvements in or relating to control and protective systems for electrical apparatus
GB521730A (en) Improvements in or relating to control and protective systems for electrical apparatus
GB828218A (en) Improvements in or relating to safety devices for the protection of electric cables against accidental faults
GB250242A (en) Protective device for electric circuits
GB1127682A (en) Electric direct current supply apparatus
GB794106A (en) Improvements in earth leakage protective devices
US1890775A (en) Instantaneous selective protective arrangement for direct current networks
US2034518A (en) Protection of electric systems
GB648207A (en) Improvements in protective devices for electric circuits
GB768750A (en) Improvements in single phase electric circuit breakers
GB540973A (en) Improvements in or relating to electric protective systems
GB551059A (en) Improvements in earth leakage electric protective arrangements
SU88911A1 (en) Device for selectively protecting feeders and machines from earth faults
GB542804A (en) Improvements in or relating to electric protective arrangements
GB257699A (en) Electric protective arrangement
GB246893A (en) Improvements in or relating to protective arrangements for alternating current electric circuits
GB970295A (en) Improvements in or relating to earth fault protection for electrical supply systems
GB636088A (en) Improvements in or relating to electric protective systems
GB422851A (en) Improvements in or relating to the protection of electric water heating apparatus
GB525334A (en) Improvements in and relating to protective devices for electric transmission systems