GB1212419A - Improvements relating to electrical protective arrangements - Google Patents

Improvements relating to electrical protective arrangements

Info

Publication number
GB1212419A
GB1212419A GB1756568A GB1756568A GB1212419A GB 1212419 A GB1212419 A GB 1212419A GB 1756568 A GB1756568 A GB 1756568A GB 1756568 A GB1756568 A GB 1756568A GB 1212419 A GB1212419 A GB 1212419A
Authority
GB
United Kingdom
Prior art keywords
circuit
coil
release
breaker
delay
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
GB1756568A
Inventor
Franco Pardini
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.)
CGE Generale Elettromeccanica SpA
Original Assignee
CGE Generale Elettromeccanica SpA
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 CGE Generale Elettromeccanica SpA filed Critical CGE Generale Elettromeccanica SpA
Publication of GB1212419A publication Critical patent/GB1212419A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/66—Power reset mechanisms
    • H01H71/68—Power reset mechanisms actuated by electromagnet
    • H01H71/685—Power reset mechanisms actuated by electromagnet in which the excitation of the electromagnet is interrupted by abnormal conditions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
    • 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
    • H02H3/093—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 with timing means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Relay Circuits (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

1,212,419. Protective arrangements. CGECOMPAGNIA GENERALE DI ELETTRICITA S.p.A. 11 April, 1968 [13 April, 1967; 29 Dec., 1967], No. 17565/68. Heading H2K. [Also in Division H1] A circuit-breaker 1 has its trip or release coil 31 connected in a control circuit which includes the contacts 47 of a relay which operates without delay and -has a coil or coils 15-1 ... 15-3 responsive to excess current in the protected circuit, the control circuit having a series resistance/capacitance circuit 59, 60 to provide a delay in the tripping or release of the circuit-breaker. In the arrangement shown, the resistance/capacitance delay circuit 59, 60 delays the release of an auxiliary relay 56 having its contacts 56b controlling the energization of an undervoltage release coil 31 A further resistance/capacitance circuit 61, 62 assists in maintaining the energization of the coil 31 under transient low voltage conditions. Bimetallic overload responsive tripping devices 65 are provided. In one modified arrangement, the auxiliary relay 56 is not used, Fig. 8 (not shown), and in another arrangement, Fig. 9 (not shown), the circuit-breaker has a "shunt" trip coil.
GB1756568A 1967-04-13 1968-04-11 Improvements relating to electrical protective arrangements Expired GB1212419A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1488667 1967-04-13
IT2449667 1967-12-29

Publications (1)

Publication Number Publication Date
GB1212419A true GB1212419A (en) 1970-11-18

Family

ID=26326747

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1756568A Expired GB1212419A (en) 1967-04-13 1968-04-11 Improvements relating to electrical protective arrangements

Country Status (3)

Country Link
DE (1) DE1763158C3 (en)
FR (1) FR1570556A (en)
GB (1) GB1212419A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0955660A1 (en) * 1998-05-08 1999-11-10 Schurter AG Electric circuit breaker for apparatus having a current overload and undervoltage function and a current overload sensor therefore

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016518A (en) * 1975-09-25 1977-04-05 Westinghouse Electric Corporation Circuit breaker with improved single coil actuator and undervoltage release mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0955660A1 (en) * 1998-05-08 1999-11-10 Schurter AG Electric circuit breaker for apparatus having a current overload and undervoltage function and a current overload sensor therefore
US6222713B1 (en) 1998-05-08 2001-04-24 Schurter Ag Electrical protective equipment switch with overcurrent and undervoltage function and overcurrent sensor for it

Also Published As

Publication number Publication date
FR1570556A (en) 1969-06-13
DE1763158A1 (en) 1971-10-07
DE1763158C3 (en) 1979-08-30
DE1763158B2 (en) 1979-01-04

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Legal Events

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