GB2255456B - Electrical protection devices - Google Patents

Electrical protection devices

Info

Publication number
GB2255456B
GB2255456B GB9209542A GB9209542A GB2255456B GB 2255456 B GB2255456 B GB 2255456B GB 9209542 A GB9209542 A GB 9209542A GB 9209542 A GB9209542 A GB 9209542A GB 2255456 B GB2255456 B GB 2255456B
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
GB9209542A
Other versions
GB9209542D0 (en
GB2255456A (en
Inventor
Joginder Sikka
Bhaskar Karman Shah
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
Publication of GB9209542D0 publication Critical patent/GB9209542D0/en
Publication of GB2255456A publication Critical patent/GB2255456A/en
Application granted granted Critical
Publication of GB2255456B publication Critical patent/GB2255456B/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
    • 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
    • H02H3/338—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 also responsive to wiring error, e.g. loss of neutral, break

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
GB9209542A 1991-05-02 1992-05-01 Electrical protection devices Expired - Fee Related GB2255456B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919109477A GB9109477D0 (en) 1991-05-02 1991-05-02 Electrical protection devices

Publications (3)

Publication Number Publication Date
GB9209542D0 GB9209542D0 (en) 1992-06-17
GB2255456A GB2255456A (en) 1992-11-04
GB2255456B true GB2255456B (en) 1995-02-01

Family

ID=10694328

Family Applications (2)

Application Number Title Priority Date Filing Date
GB919109477A Pending GB9109477D0 (en) 1991-05-02 1991-05-02 Electrical protection devices
GB9209542A Expired - Fee Related GB2255456B (en) 1991-05-02 1992-05-01 Electrical protection devices

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB919109477A Pending GB9109477D0 (en) 1991-05-02 1991-05-02 Electrical protection devices

Country Status (3)

Country Link
AU (1) AU1658492A (en)
GB (2) GB9109477D0 (en)
WO (1) WO1992020130A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US8179157B2 (en) 2009-01-21 2012-05-15 Trane International Inc. Setup and method for testing a permanent magnet motor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244398A (en) * 1990-05-25 1991-11-27 Mk Electric Ltd Test circuit for residual current device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963963A (en) * 1975-04-22 1976-06-15 Rca Corporation Ground-fault detection system
US4180841A (en) * 1977-11-21 1979-12-25 Westinghouse Electric Corp. Ground fault circuit interrupter with grounded neutral protection
GB2081994B (en) * 1980-08-11 1983-04-07 South Eastern Elec Board Pulse sampled e l c b
GB2159354B (en) * 1984-04-03 1987-10-28 Birmid Qualcast Electrical protective devices
IE56011B1 (en) * 1985-01-29 1991-03-13 Atreus Enterprises Limited Improved residual current device
GB8512133D0 (en) * 1985-05-14 1985-06-19 Dorman Smith Switchgear Ltd Residual current detector
GB8524705D0 (en) * 1985-10-07 1985-11-13 Duraplug Elect Ltd Residual current circuit breaker
IE880341L (en) * 1988-02-08 1989-08-08 Patrick Ward Ground fault current interrupter circuit
GB2224404B (en) * 1988-10-25 1993-03-17 Shakira Ltd Residual current device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244398A (en) * 1990-05-25 1991-11-27 Mk Electric Ltd Test circuit for residual current device

Also Published As

Publication number Publication date
AU1658492A (en) 1992-12-21
GB9209542D0 (en) 1992-06-17
GB9109477D0 (en) 1991-06-26
GB2255456A (en) 1992-11-04
WO1992020130A1 (en) 1992-11-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030501