GB2244396B - Electrical protection devices - Google Patents

Electrical protection devices

Info

Publication number
GB2244396B
GB2244396B GB9011795A GB9011795A GB2244396B GB 2244396 B GB2244396 B GB 2244396B GB 9011795 A GB9011795 A GB 9011795A GB 9011795 A GB9011795 A GB 9011795A GB 2244396 B GB2244396 B GB 2244396B
Authority
GB
United Kingdom
Prior art keywords
protection devices
electrical protection
electrical
devices
protection
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 - Fee Related
Application number
GB9011795A
Other versions
GB9011795D0 (en
GB2244396A (en
Inventor
Joginder Sikka
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.)
Novar ED&S Ltd
Original Assignee
MK Electric 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
Application filed by MK Electric Ltd filed Critical MK Electric Ltd
Priority to GB9011795A priority Critical patent/GB2244396B/en
Publication of GB9011795D0 publication Critical patent/GB9011795D0/en
Priority to AU78676/91A priority patent/AU7867691A/en
Priority to PCT/GB1991/000805 priority patent/WO1991019339A1/en
Publication of GB2244396A publication Critical patent/GB2244396A/en
Application granted granted Critical
Publication of GB2244396B publication Critical patent/GB2244396B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • 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
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
GB9011795A 1990-05-25 1990-05-25 Electrical protection devices Expired - Fee Related GB2244396B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9011795A GB2244396B (en) 1990-05-25 1990-05-25 Electrical protection devices
AU78676/91A AU7867691A (en) 1990-05-25 1991-05-22 Electrical protection devices
PCT/GB1991/000805 WO1991019339A1 (en) 1990-05-25 1991-05-22 Electrical protection devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9011795A GB2244396B (en) 1990-05-25 1990-05-25 Electrical protection devices

Publications (3)

Publication Number Publication Date
GB9011795D0 GB9011795D0 (en) 1990-07-18
GB2244396A GB2244396A (en) 1991-11-27
GB2244396B true GB2244396B (en) 1994-02-23

Family

ID=10676600

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9011795A Expired - Fee Related GB2244396B (en) 1990-05-25 1990-05-25 Electrical protection devices

Country Status (3)

Country Link
AU (1) AU7867691A (en)
GB (1) GB2244396B (en)
WO (1) WO1991019339A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410735B (en) * 2001-06-12 2003-07-25 Moeller Gebaeudeautomation Kg CIRCUIT ARRANGEMENT FOR A FAULT CURRENT CIRCUIT BREAKER
US7190124B2 (en) 2005-05-16 2007-03-13 Lutron Electronics Co., Inc. Two-wire dimmer with power supply and load protection circuit in the event of switch failure
KR101068718B1 (en) * 2009-05-21 2011-09-28 엘에스산전 주식회사 Abnormal current detecting circuit for circuit breaker

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047994A (en) * 1979-02-23 1980-12-03 Thorn Television Rentals Ltd Current balance earth leakage circuit breaker
US4271447A (en) * 1979-07-31 1981-06-02 General Electric Company Power supply for circuit breaker static trip unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3555359A (en) * 1967-08-07 1971-01-12 Hubbell Inc Harvey Circuit protective device
DE3888243D1 (en) * 1987-06-19 1994-04-14 Festo Kg Circuit arrangement for protection against fault currents.
US4833564A (en) * 1987-09-24 1989-05-23 Siemens Energy & Automation, Inc. Current sensing relay circuit with adjustable sensitivity and tracking test circuit
US4901219A (en) * 1987-12-22 1990-02-13 Square D Company Plug-in power supply
US4860157A (en) * 1988-04-25 1989-08-22 General Electric Company Molded case circuit breaker actuator-accessory module

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2047994A (en) * 1979-02-23 1980-12-03 Thorn Television Rentals Ltd Current balance earth leakage circuit breaker
US4271447A (en) * 1979-07-31 1981-06-02 General Electric Company Power supply for circuit breaker static trip unit

Also Published As

Publication number Publication date
GB9011795D0 (en) 1990-07-18
AU7867691A (en) 1991-12-31
GB2244396A (en) 1991-11-27
WO1991019339A1 (en) 1991-12-12

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20000328

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020525