GB1383143A - Remote control circuit breaker - Google Patents

Remote control circuit breaker

Info

Publication number
GB1383143A
GB1383143A GB297373A GB297373A GB1383143A GB 1383143 A GB1383143 A GB 1383143A GB 297373 A GB297373 A GB 297373A GB 297373 A GB297373 A GB 297373A GB 1383143 A GB1383143 A GB 1383143A
Authority
GB
United Kingdom
Prior art keywords
contacts
armature
transistor
winding
overload
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
GB297373A
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.)
Cutler Hammer Australia Pty Ltd
Cutler Hammer International Finance Inc
Original Assignee
Cutler Hammer Australia Pty Ltd
Cutler Hammer International Finance Inc
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 Cutler Hammer Australia Pty Ltd, Cutler Hammer International Finance Inc filed Critical Cutler Hammer Australia Pty Ltd
Publication of GB1383143A publication Critical patent/GB1383143A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H75/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
    • H01H75/12—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism having combined electrothermal and electromagnetic release
    • 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
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • 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
    • H02H3/083—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 for three-phase systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/203—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition with shunt trip circuits, e.g. NC contact in an undervoltage coil circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

1383143 Protective arrangements CUTLER-HAMMER INTERNATIONAL FINANCE Inc 19 Jan 1973 [19 Jan 1972 (2)] 2973/73 Heading H2K [Also in Division H1] An overload protective device has main contacts 24 and overload trip contacts 33 resiliently biased towards their open positions, thermally responsive latching means 22, 66, 62 which close the contacts 33 when overload occurs, electromagnetic operating means comprising an armature movable between two limiting positions by energization of windings 26, 30, the armature being coupled to close the main contacts 24 by a member 58 which is released to open the main contacts 24 by the latching means. To closethe main contacts 24, a remote pilot circuitbreaker 4 is closed to turn off a transistor Q 1 to permit a silicon controlled rectifier 5 to conduct, so energizing a winding 26. The resulting flux overcomes that of a permanent magnet (not shown) and the armature 56 moves into the position of Fig. 2 where it is again retained by the magnet. This movement of the armature closes the main contacts 24, opens contacts 28 in series with the winding 26 and closes contacts 32 in series with the winding 30. If the circuitbreaker 4 is opened, the potential on a line 47 again rises so that the transistor Q1 is turned on and turns off a transistor Q3. This enables a capacitor C3 to charge and cause a silicon controlled rectifier 10 to conduct to energize the winding 30. This causes the armature to move back opening contacts 24, 32 and reclosing the contacts 28. In the event of overload, a bimetallic element 22 releases a latched member 62 which allows the member 58 to pivot on the armature 56 and open the main contacts 24. The member 62 closes the overload contacts 33 to cause current to flow through a resistor R8, a thermistor 34, a resistor R9, a diode D7 and a resistor R6. Initially this causes the transistor Q3 to be held on, clamping the control electrode of the rectifier 10 to earth. Then the circuitbreaker 4 trips open so that the current flow through the thermistor ceases and the voltages across resistors R8, R9 become equal causing the transistor Q3 to turn off. The controlled rectifier 10 conducts to energize the winding 30 to reset the armature and the latching means. Further devices 2, 3 may be connected as indicated for common operation in a three-phase circuit.
GB297373A 1972-01-19 1973-01-19 Remote control circuit breaker Expired GB1383143A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US21895572A 1972-01-19 1972-01-19
US21895672A 1972-01-19 1972-01-19

Publications (1)

Publication Number Publication Date
GB1383143A true GB1383143A (en) 1975-02-05

Family

ID=26913414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB297373A Expired GB1383143A (en) 1972-01-19 1973-01-19 Remote control circuit breaker

Country Status (1)

Country Link
GB (1) GB1383143A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193039A (en) * 1986-07-22 1988-01-27 Ferranti Measurements Switching arrangement
GB2201054A (en) * 1987-01-30 1988-08-17 Simatelex Manuf Co Electric protective circuit and switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193039A (en) * 1986-07-22 1988-01-27 Ferranti Measurements Switching arrangement
GB2193039B (en) * 1986-07-22 1989-12-20 Ferranti Measurements Switching arrangement
GB2201054A (en) * 1987-01-30 1988-08-17 Simatelex Manuf Co Electric protective circuit and switch
GB2201054B (en) * 1987-01-30 1991-04-24 Simatelex Manuf Co Safety protection devices

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19930117