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US3846676A - Electronic control system for remote control circuit breakers - Google Patents

Electronic control system for remote control circuit breakers Download PDF

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Publication number
US3846676A
US3846676A US00396733A US39673373A US3846676A US 3846676 A US3846676 A US 3846676A US 00396733 A US00396733 A US 00396733A US 39673373 A US39673373 A US 39673373A US 3846676 A US3846676 A US 3846676A
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US
United States
Prior art keywords
circuit breaker
logic
trip
control circuit
coil
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 - Lifetime
Application number
US00396733A
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English (en)
Inventor
W Rutchik
Zeeland D Van
L Ryczek
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 Inc
Original Assignee
Cutler Hammer 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 Inc filed Critical Cutler Hammer Inc
Priority to US00396733A priority Critical patent/US3846676A/en
Priority to SE7411304A priority patent/SE7411304L/xx
Priority to NL7411967A priority patent/NL7411967A/xx
Priority to FR7430849A priority patent/FR2244254B3/fr
Priority to DE19742443704 priority patent/DE2443704A1/de
Application granted granted Critical
Publication of US3846676A publication Critical patent/US3846676A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H02H3/08—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
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00007—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
    • H02J13/00009—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission using pulsed signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
    • H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/121—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using the power network as support for the transmission

Definitions

  • circuit breaker system uses electronic control together with mechanically operated cut-throat contacts for controlling the energization of set and trip" coils of the circuit breakers electromagnetic operator in response to the closing and opening of a remotely located pilot control circuit breaker.
  • the electronic control additionally responds to trip-open of the main circuit breaker to subject the pilot breaker to a controlled value of simulated over-load current that will cause the latter to trip open and afford indication of opening of the main circuit breaker.
  • cut-throat contacts The operation of the aforementioned cut-throat contacts is dependent upon the armature of the electromagnetic operator attaining one or the other of its extreme positions.
  • the required adjustment of such contacts to open in correspondence with the armature attaining its sealed positions is critical. If they open too soon the armature may not attain sealed position, or if they fail to open coil burn-out can result.
  • a nonmechanical way of effecting deenergization of these operating coils of the electromagnetic operator is highly desirable.
  • a further object of the invention is to provide an electronic control system of the aforementioned type which is characterized by affording timed pulses of current to the set and trip coils for a duration sufficient to insure that the armature of electromagnetic operator will transfer from one to the other of its extreme sealed positions.
  • Another object of the invention is to provide an electronic control system of the aforementioned type which can function equally well when supplied with either or both main AC power and auxiliary DC power.
  • a more specific object is to provide an electronic control system of the aforementioned type wherein digital type logic modules are utilized to initiate triggering the energization of the set and trip coils in response to the closing and opening of the remote pilot control breaker, and
  • a still further specific object of the invention is providing an electronic control system of the aforementioned type wherein said digital type logic modules also initiate deenergization of said set and trip coils a predetermined timed interval following energization of the latter.
  • FIGURE of the drawing is a diagramatic showing of a remote control circuit breaker system which incorporates the improved electronic control of the present invention.
  • the drawing shows an improved remote control circuit breaker system as applied to a typical three phase, 1 15/200 volt, 400 Hz alternating current power supply, and an auxiliary 28 volt DC. power supply, such as found on large jet aircraft. It comprises independent bimetal thermal elements l0 l0" and 10 connected in series in each of the three phase supply lines A, B and C, respectively, and main load contacts l2", l2 and 12 that are connected in series with thermal elements 10", 10" and 10, respectively and to a load 13.
  • the contacts 12, 12 and 12 are electromechanically closed by energization of a set coil S, and opened by energization of a trip coil T as will hereinafter be explained.
  • Energization and deenergization of coils S and T is initially by operation of a remote pilot circuit breaker RPB which would be located in the flight deck for operation and monitoring by flight personnel.
  • Overload trip contacts OLT which are normally held open upon normal opening and closing of contacts l2", l2", and 12 as directed by the pilot control circuit breaker, are caused to trip closed upon occurance of an overload for a purpose that will hereinafter be explained.
  • the construction and purpose of coils S and T and contacts OLT is basically the same as that described in the Halbeck et al. U.S. Pat. No. 3,706,100 and in the copending Mallonen application Ser. No. 409,785 filed Oct. 26, I973 and assigned to the assignee ofthis application.
  • the novelty in the present invention resides in the improved electrical and electronic circuitry now to be described for controlling the energization and deenergization of coils S and T, and causing the trip open of pilot circuit breaker RPB upon occurance of overload response and opening of main breaker contacts l2, l2 and 12".
  • These circuits are supplied with rectified AC from lines B and C through diodes D1 and D2 which are connected to a junction point 14.
  • Trip coil T is connected at one end in series with a line 16 and a resistor R1 to junction 14 and at its other end in series with the main conducting path of a semi-conductor controlled rectifier SRCI to ground.
  • Set coil S is also connected at one end to junction 14 in series with line 16 and resistor R1 and at its other end in series with the main conducting path of SCR2, like SCRl, to ground.
  • the control electrodes of SCRl and SCR2 are connected through filter capacitors Cl and C2 to ground respectively, control electrode of SCRI is connected to the output terminal 10 of NOR logic unit ICZD of an integrated circuit module IC2, and the control electrode of SCR2 is similarly connected to the output terminal ll of NOR unit IC2B of module IC2.
  • control electrode of SCRI will be subjected to a firing current wherever the output of unit IC2A is at logic I level and similarly the control electrode of SCR2 will be subjected to a firing current whenever the output terminal of logic unit IC2B is at a logic I level.
  • a diode D3 which has its anode connected to line 16 is connected in series with overload trip contacts OLT and a thermistor TH through a line 18 to a terminal 3.
  • Terminal 3 has connection through a line 20 to one side of remote pilot circuit breaker RPB which at its other side is connected to ground.
  • the point common between contacts OLT and thermistor TH is connected in series with a resistor R2 to the base of a transistor Q2.
  • the collector of a transistor Q2 and terminal 3 is connected in series with a resistor R3 to the collector of a transistor Q3 and to the interconnected bases of transistors Q2 and Q3.
  • the collector of transistor O1 is connected to the upper plate of a capacitor C3 which has its other plate connected to ground.
  • the emitter of O1 is connected to the base of an N-P-N transistor Q4, and in series with the collector-emitter circuit of O4 to ground.
  • the emitter of transistors Q2 and Q3 are connected to ground.
  • a pair of capacitors C4 and C5 are connected in series between line 16 and ground, and serve as high frequency noise filters to prevent unwanted turn-on of either SCR] or SCR2.
  • Diodes D4 and D5 connected in series between ground and line 16 prevent the anodes of SCRl and SCR2 from swinging negative.
  • Diodes D6 and D7 are connected across coils'T and S respectively in the reverse conducting relation shown to prevent the coils from being subjected to inductive transients when either of them are switched off, and to provide coil circulating currents when switched on.
  • junction point 14 of the power supply is connected in series with a diode D8, a resistor R4, a diode D9 and voltage divider resistors R5 and R6 to ground.
  • a capacitor C6 is connected from the junction point 20 between diode D9 and resistor R5 to ground.
  • a diode D10 has its anode connected to the point common between coil T, the anode of SCRl and the anode of diode D6 and its cathode to junction point 20.
  • a diode D11 has its anode connected to the point common between coil S, the anode of SCR2 and the anode of diode D7, and its cathode to junction point 20.
  • Diodes D10 and D11 couple the anodes of SCR1 and SC R2 to capacitor C6 for dv/dt protection.
  • Auxiliary D.C. power at 28 volts may be assumed to be applied at terminal 22.
  • Terminal 22 is connected in series with an inductor L1 to a junction point 24, and a diode D12 is connected from ground to junction point 24.
  • lnductor Ll prevents high frequency high current oscillation, and diode D12 suppresses negative transient spikes.
  • Junction point 24 is connected in series with a diode D13 to the point common between diode D3 and contacts 0LT, and is connected in series with diodes D14 and D15 to the point common between D8 and resistor R4. It will be seen that in the absence or cut-off of A.C. supply power the OLT contact circuit and voltage divider resistors R5 and R1 will be supplied with D.C. control power from D.C. input terminal 22.
  • Diodes D13, D14 and D15, and diode D8 serve to decouple the A.C. and D.C. power supply sources from each other.
  • N-P-N transistor Q5 has its cathode connected in series with a diode D16 to line 16.
  • Another N-P-N transistor Q6 has its collector-emitter circuit connected between the collector and base of O5 in a darlington configuration and has its base connected to the collector of a P-N-P transistor Q7.
  • Bias resistors R7 and R8 are connected across the emitter-base circuits of Q5 and Q6 respectively.
  • a resistor R9 is connected across the emitter and base of Q7 and the point common between the base of Q7 and resistor R9 is connected in series with a resistor R11 to the collector of an N-P-N transistor Q8 which has its collector connected to ground.
  • a zener diode ZDl is connected between the collector and emitter of 08 as shown to provide transient voltage protection thereacross.
  • the base of O8 is connected in series with a resistor R10 to the output terminal of logic unit lCl with a capacitor C7 connected between the base and collector of Q8.
  • junction point 20 is connected in series with resistors R11 and R12 to one input terminal of logic unit lC2C of [C2, respectively, and such junction point is also connected in series with a resistor R13, a line 26, a capacitor 8 to an input terminal of logic unit lC ID of lCl, and to an input terminal of logic unit lC2B of 1C2.
  • a zener diode ZD2 has its anode connected to ground and its cathode connected to the point common between resistor R13 and line 26 and acts as a voltage regulator.
  • the point common between diodes D14 and D15 is connected in series with a resistor R14 to line 26.
  • the point common between dioded D8 and D15 is connected through line 28 and a resistor R15 to input terminal of logic units IC2D and IClC.
  • Line 28 is also connected through a resistor R16 to input terminals of logic unit IC2B and IClD, respectively.
  • Both input terminals of logic unit IC2A and both input terminals of logic unit ICZB are connected through a line 30 to the point common between the collector of transistor Q1 and capacitor C3.
  • the logic output of IC2C is connected in series with a capacitor C9 to the point common to resistor R15, and the aforementioned input terminals of logic unit [C2D and IClC.
  • the logic output terminal of IC2D is connected in series with a reversely poled diode D17 to the aforementioned input terminal of logic units IC2B and IC 1D and to the upper plate of a capacitor 10 which has connectors through its lower plate to ground.
  • a resistor R18 is connected at one end to the point common between resistor R12 and terminal 3, and at its other end to a point common between capacitor C8 and another input terminal of logic units lC2B and lClD.
  • logic unit IClA The point common between voltage divider resistors R5 and R6 is connected to an input of logic unit IClA.
  • the logic output terminal of logic unit lClB is connected to the other input terminal of IC 1A.
  • Logic unit IClB has one of its input terminals connected to the output terminal of logic unit lClC and its other input terminal connected to the output terminal of logic unit lClD.
  • capacitor C10 and R11 are selected to provide an RC time constant that will insure SCR2 and coil S being maintained energized sufficiently long to effect closure of the main circuit breaker contacts l2", l2" and 12".
  • RPB is opened.
  • the input terminals to lC2C follow the rise in potential at terminal 3, and immediately go to a logic 1 level, and the output terminal of the latter correspondingly goes to a logic 0" level, as do the input terminals of IC2D.'Thus the output terminal of lC2D goes to a logic 1 level causing the control gate of SCRl to be subjected to a firing current and SCRl then turns on. Rectified AC current then flows through diodes D1 and D2, resistor R1, coil T and SCRl. Coil T is thus energized to cause the electromechanical operating mechanism to open main breaker contacts 12", 12" and 12.
  • Capacitor 9 which was previously discharged begins to charge when the output terminal of lC2C terminal goes to a logic 0" level.
  • the charge potential of capacitor 9 reaches a logic 1" level, the upper input terminal of lC2D being subjected to such potential causes the output terminal of the latter to shift to a logic 0 level. Consequently SCRl will thereafter turn-off on the next zero point in the rectified AC current.
  • the value of capacitor C9 and resistor R15 are selected to provide an RC time constant that will insure SCRl and coil T being maintained energized suffciently long to complete opening of contacts 12, 12, and 12.
  • the electromagnetic armature of the main circuit breaker is caused to operate to the point wherein main contacts 12, 12 and 12 are held open pending reclosing of remote pilot breaker RPB.
  • the transfer of the armature of the electromagnetic operate effects reopening of overload trip contacts OLT.
  • thermistor TH also functions to limit current flow through line 18 and pilot control breaker RPB if a fault should occur. If a fault should occur in line 18 or breaker RPB, the high current flowing through TH will cause its temperature to rise and when C is reached a very marked increase in ohmic resistance of TH occurs thereby limiting the current flow therethrough.
  • lClA will then have logic 0 levels at both input terminals to cause a shift to logic 1 at its output terminal and effect consequent turn-on of transistor Q8, Q7, Q6 and OS for a timed interval and provide current flow through lines 26 and 16 to energize SCRl and trip coil T.
  • said means comprises means for controlling the supply of DC. energizing current to the set and trip coils in event of loss of main AC power, said last mentioned means being responsive to presence of normal AC power to block flow of DC energizing current, and being responsive to absence of normal AC voltage to make auxiliary DC power available to energize said set and trip coils.
  • said means comprises first and second digital logic switching means, and first switching means responding to closure of said pilot control circuit breaker to initiate energization of said set coil, and said second switching means responding to opening of said pilot control circuit breaker to initiate energization of said trip coil.
  • each of said switching means includes timing circuit means which cause each of the latter to switch to coil deenergizing states after a timed interval following its switching to the coil energizing state.
  • said third digital logic switching means includes means responsive to action of said timing circuit means to provide coil deenergizing states to render said transistor means non-conducting to remove auxiliary DC power from said set and trip coils.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
US00396733A 1973-09-13 1973-09-13 Electronic control system for remote control circuit breakers Expired - Lifetime US3846676A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US00396733A US3846676A (en) 1973-09-13 1973-09-13 Electronic control system for remote control circuit breakers
SE7411304A SE7411304L (de) 1973-09-13 1974-09-06
NL7411967A NL7411967A (nl) 1973-09-13 1974-09-09 Elektronisch besturingssysteem voor op afstand bestuurde schakelaars.
FR7430849A FR2244254B3 (de) 1973-09-13 1974-09-12
DE19742443704 DE2443704A1 (de) 1973-09-13 1974-09-12 Schaltungsanordnung zur elektronischen ueberwachung eines fernbedienbaren unterbrechersystems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00396733A US3846676A (en) 1973-09-13 1973-09-13 Electronic control system for remote control circuit breakers

Publications (1)

Publication Number Publication Date
US3846676A true US3846676A (en) 1974-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00396733A Expired - Lifetime US3846676A (en) 1973-09-13 1973-09-13 Electronic control system for remote control circuit breakers

Country Status (5)

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US (1) US3846676A (de)
DE (1) DE2443704A1 (de)
FR (1) FR2244254B3 (de)
NL (1) NL7411967A (de)
SE (1) SE7411304L (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272687A (en) * 1979-03-05 1981-06-09 Borkan William N Power manageable circuit breaker
US4316230A (en) * 1979-10-09 1982-02-16 Eaton Corporation Minimum size, integral, A.C. overload current sensing, remote power controller with reset lockout
US4333122A (en) * 1978-07-10 1982-06-01 Eaton Corporation Minimum size, integral, A.C. overload current sensing, remote power controller
US4346424A (en) * 1980-02-22 1982-08-24 Eaton Corporation Electronic remote control D.C. power controller and circuit breaker
EP0099233A3 (en) * 1982-07-06 1985-01-16 Texas Instruments Incorporated Circuit control device
US4899247A (en) * 1987-07-07 1990-02-06 Brush Switchgear Limited Auto recloser coil burn-out protection
US4965694A (en) * 1989-03-30 1990-10-23 Square D Company Remote controlled circuit breaker system
US20100053850A1 (en) * 2006-01-20 2010-03-04 Adc Telecommunications, Inc. Modular power distribution system and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440609A1 (fr) * 1978-11-06 1980-05-30 Merlin Gerin Bloc auxiliaire de commande d'ouverture d'un disjoncteur de protection differentielle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211955A (en) * 1960-03-29 1965-10-12 Westinghouse Electric Corp Circuit interrupting device
US3706916A (en) * 1972-01-19 1972-12-19 Cutler Hammer Inc Remote control circuit breaker system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211955A (en) * 1960-03-29 1965-10-12 Westinghouse Electric Corp Circuit interrupting device
US3706916A (en) * 1972-01-19 1972-12-19 Cutler Hammer Inc Remote control circuit breaker system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333122A (en) * 1978-07-10 1982-06-01 Eaton Corporation Minimum size, integral, A.C. overload current sensing, remote power controller
US4272687A (en) * 1979-03-05 1981-06-09 Borkan William N Power manageable circuit breaker
US4316230A (en) * 1979-10-09 1982-02-16 Eaton Corporation Minimum size, integral, A.C. overload current sensing, remote power controller with reset lockout
US4346424A (en) * 1980-02-22 1982-08-24 Eaton Corporation Electronic remote control D.C. power controller and circuit breaker
EP0099233A3 (en) * 1982-07-06 1985-01-16 Texas Instruments Incorporated Circuit control device
US4899247A (en) * 1987-07-07 1990-02-06 Brush Switchgear Limited Auto recloser coil burn-out protection
US4965694A (en) * 1989-03-30 1990-10-23 Square D Company Remote controlled circuit breaker system
US20100053850A1 (en) * 2006-01-20 2010-03-04 Adc Telecommunications, Inc. Modular power distribution system and methods
US7995329B2 (en) * 2006-01-20 2011-08-09 Adc Telecommunications, Inc. Modular power distribution system and methods
US8451590B2 (en) 2006-01-20 2013-05-28 Adc Telecommunications, Inc. Modular power distribution system and methods
US9276394B2 (en) 2006-01-20 2016-03-01 Commscope Technologies Llc Modular power distribution system and methods
US10554036B2 (en) 2006-01-20 2020-02-04 Commscope Technologies Llc Modular power distribution system and methods

Also Published As

Publication number Publication date
NL7411967A (nl) 1975-03-17
FR2244254B3 (de) 1977-06-17
FR2244254A1 (de) 1975-04-11
SE7411304L (de) 1975-03-14
DE2443704A1 (de) 1975-04-03

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