EP0105786B1 - Disjoncteur de branchement à déclencheur électronique et à télécalibrage - Google Patents

Disjoncteur de branchement à déclencheur électronique et à télécalibrage Download PDF

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Publication number
EP0105786B1
EP0105786B1 EP19830401856 EP83401856A EP0105786B1 EP 0105786 B1 EP0105786 B1 EP 0105786B1 EP 19830401856 EP19830401856 EP 19830401856 EP 83401856 A EP83401856 A EP 83401856A EP 0105786 B1 EP0105786 B1 EP 0105786B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
resistance
switch
circuit
size
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
EP19830401856
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0105786A1 (fr
Inventor
Paul Canonne
Michel Legrand
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0105786A1 publication Critical patent/EP0105786A1/fr
Application granted granted Critical
Publication of EP0105786B1 publication Critical patent/EP0105786B1/fr
Expired legal-status Critical Current

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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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection

Definitions

  • the document EP-A1-0079270 (Article 54 (3) (4) of the EPC) relates to a circuit breaker of the kind mentioned.
  • the gauge switch is nevertheless attached to or integrated into the circuit breaker, and mechanically coupled to the cursor of a resistive bridge or a potentiometer connected in parallel to the terminals of the rectifier.
  • the switch is formed by a step-by-step actuator with electromechanical control remotely controlled from the meter box by an auxiliary generator associated with a caliber preselector.
  • the arrangement of such a device is complicated and expensive.
  • connection circuit breaker box shown in FIG. 3 of document EP-A1-0061364, the resistive voltage divider bridge and the manual switch, to place them near the meter, but a fault in the circuit of connection, by breaking of one or more wires, or by short-circuit between two wires can hinder the good functioning of the circuit breaker, either by absence of power supply of the electronic signal processing module causing the paralysis of the circuit breaker, or by an adjustment uncontrolled caliber likely to cause untimely triggering.
  • the link circuit between the telecalibration circuit and the circuit breaker necessarily requires three pilot wires.
  • the present invention aims to remedy the aforementioned drawbacks and to allow the production of a simple and reliable telecalibration device allowing the continuity of the operation of the circuit breaker regardless of the state of the link circuit.
  • the current sensor being associated with a rectifier supplying the resistive bridge, the series resistance is connected between one of the terminals of the rectifier and a connection point with a connecting conductor, and that the shunt resistor includes a resistor connected to the opposite polarity terminal of the rectifier and to the other connecting conductor.
  • the caliber switch of the remote control circuit cooperates with a plurality of selection pads allowing the series connection with the resistance of a variable resistance loop between zero and infinity depending on the position of the switch, the maximum caliber corresponding to the position of the switch for short-circuiting the connecting conductors, the lower rating intervening on the pad corresponding to an infinite resistance of the loop and the absence of shunt resistance, while the intermediate rating operates on the pad by insertion of a predetermined resistance.
  • Figure 1 is shown an electrical connected four-pole circuit breaker downstream of an energy meter 11 in an alternative distribution network for the supply of the low-voltage electrical installation of a customer having subscribed to a distribution company.
  • the counter 11 is housed in an external electrical cabinet accessible to the distributor, while the circuit breaker is arranged in the subscriber's room, separated from the cabinet by a certain distance.
  • the circuit breaker can be of the bipolar type in the case of a single-phase distribution with neutral.
  • the connection circuit breaker is of multiple ratings and includes a mechanism for operating 12 of the movable contacts 16, the latter being inserted into the active conductors of phase R, S, T and neutral N of the network.
  • the mechanism 12 is actuated either manually by a trigger button 18 and a reset button 20, or automatically by means of a trigger bar associated with an electromagnetic relay 22, in particular of the polarized type.
  • the coil 24 for controlling the trip relay 22 is controlled by an electronic control module 26 capable of monitoring the intensity of the current in the active conductors of the network and of producing an order to open the relay 22 if the selected rating corresponding to the power subscribed by the subscriber.
  • the electronic module 26 for controlling the circuit breaker has its own current of the type described in document EP-A1-0061364 to which reference will be made for further details; it comprises in particular a current sensor 28 associated with each of the phases of the network to detect the current in each phase conductor, and an electronic processing unit 30 for the signal emitted by the sensor to deliver to the coil 24 a trigger signal when the current exceeds a predetermined current function.
  • Each sensor 28 is formed by an intensity transformer whose secondary winding is connected to a diode rectifier bridge D 11 to D 14; D 15 to D 18 ; D 19 to D 22 .
  • the outputs of the bridges are connected in parallel and connected to the terminals of a Zener diode D 10 and a storage capacitor C 4 .
  • a resistive bridge 32 voltage divider for adjusting the rating, the voltage taken at the output of the resistive bridge 32 being proportional to the intensity of the current passing through the sensors 28 after adjustment by bridge 32.
  • the output of bridge 32 is connected to a capacitor C 1 shunted by a Zener diode D 1 , which protects the processing circuit 30.
  • the circuit 30 comprises a first operational amplifier AO 1 controlled by a bias circuit with resistance R 3 and diode D 3 , associated with the negative input, and by a delay circuit with resistance R, and capacitor C 2 connected to the positive entry.
  • a discharge circuit with resistance R 2 and diode D 2 is connected in parallel to the terminals of the capacitor C 2 to provide temperature compensation.
  • the output of the amplifier AO is connected by a diode D 6 to the trigger of a thyristor Th, connected in series with the coil 24 of the trigger relay 22.
  • the capacitor C 2 Upon the appearance of an overload detected by one of the sensors 28, the capacitor C 2 is charged through the resistor R 1 , and as soon as the voltage across the terminals of the capacitor C 2 exceeds the value of the voltage applied to the negative input, the amplifier AO 1 is released to start the thyristor Th 1 , which becomes conductive by causing the tripping of the circuit breaker.
  • the first operational amplifier AO forms a long delay tripping circuit, the time delay being provided by the progressive charge of the capacitor C 2 through the resistor R 1 .
  • a second operational amplifier A0 2 is polarized in an analogous manner by a polarization circuit connected to the negative input and comprising a diode D 4 in series with a resistor R 4 .
  • the positive input of amplifier A0 2 is connected to capacitor C 1 through a resistor R 13 and a Zener diode D 8 .
  • the output of amplifier A0 2 is connected to the trigger of thyristor Th, via a diode D 5 .
  • This second amplifier A0 2 constitutes a short-delay tripping circuit intervening in the event of an overload of a value greater than that causing the long-delay tripping of the first amplifier AO 1 .
  • the adjustment of the caliber is controlled remotely by means of a remote control circuit 34, placed inside the meter cabinet 11.
  • the circuit 34 includes a connection terminal 36 electrically connected to an auxiliary socket 38 of the circuit breaker by two connecting conductors 40, 42.
  • One of the pads of the auxiliary socket 38 is connected to the positive pole of the rectifier bridges D 11 to D 22 by means of a series resistor Rg, while the other pad is connected to the negative pole by a resistor R 12 '
  • a diode D 23 is inserted between the connection point 44 of the resistor Rg and the cathode of the Zener diode D 1 to prevent the discharge of the capacitor C 1 in the resistive bridge 32
  • the remote control circuit 34 (FIG.
  • a terminal 36 of the circuit 34 is associated with a loop 46 of variable resistance depending on the position of the switch CM 1 on the pads A, B and C. This loop 46 is connected in series by the connection conductors 40, 42 with the resistor R 12 to constitute the shunt resistor arranged between point 44 and the negative pole.
  • the loop 46 of the circuit 34 comprises a first conductor 40a connected to the cursor of the switch CM 1 , and a second conductor 42a connected to the pads A, B, C, D respectively by a short-circuit link 48, by a resistor R 11 , by an open circuit, and by an injection circuit 50 of a remote tripping voltage.
  • the injection circuit 50 is equipped with a power supply 52 and an auxiliary switch CM 2 , the commissioning of which ensures the remote tripping of the circuit breaker.
  • the resistance of the loop 46 can be controlled by means of a measuring device 54 connected to the circuit 34 in a fixed or temporary manner. It is noted that the resistive bridge 32 voltage divider is formed by the resistors Rg and R 12 of the electronic module 26, and by the loop 46 of the remote control circuit 34.
  • the actuation of the switch CM 1 on the pad B causes the insertion of the resistor R 11 .
  • the shunt resistor of bridge 32 is made up of the sum of resistors R 11 and R 12 (fig. 4) and corresponds to an intermediate rating, for example 75 A.
  • the loop 46 In position C of the switch CM 1 (fig. 5), the loop 46 has infinite resistance. The absence of a shunt resistor nevertheless allows the module 26 to operate on the minimum rating (for example 60 A), determined by the series resistor Rg.
  • the change in rating by the switch CM 1 is remotely controlled by the agent from the circuit 34 by virtue of the two connecting conductors 40, 42.
  • the electronic module 26 circuit breaker control unit In the event of a voluntary short circuit of the two conductors 40, 42, the electronic module 26 circuit breaker control unit always remains in service on the maximum rating. An accidental or deliberate cut of one or both conductors 40, 42, or a bad contact of the switch CM, does not hamper the operation of the module 26 which is then set to the minimum rating. Thanks to the measuring device 54, the resistance of the loop 46 is monitored to control the size of the circuit breaker and to detect any fraud.
  • the switch CM t When the power subscribed by the subscriber does not correspond to the rating displayed by the switch CM t , it is possible to remotely condemn the subscriber's connection by positioning the rating switch CM 1 on the pad D, and by closing the auxiliary switch CM 2 of the circuit 50.
  • the loop 46 applies a permanent voltage to the input of the electronic unit 30 immediately involving the short-delay tripping circuit of the operational amplifier AO 2 . This results in the opening of the contacts 16 of the circuit breaker and the interruption of the supply of electricity to the subscriber.
  • the connection is locked as long as the CM caliber switch remains on pin D and the auxiliary switch CM 2 remains closed.
  • the shunt resistor R 12 is replaced by a plurality of elementary resistors R 20 , R 21 , R 22 ... R x in parallel, the insertion of which by one or more associated switches corresponds to the different ratings of the circuit breaker.
  • the value of the shunt resistor R 12 is adjustable allowing local calibration of the circuit breaker, independently of the remote calibration by the circuit 34.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Keying Circuit Devices (AREA)
EP19830401856 1982-09-30 1983-09-23 Disjoncteur de branchement à déclencheur électronique et à télécalibrage Expired EP0105786B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216712 1982-09-30
FR8216712A FR2534063A1 (fr) 1982-09-30 1982-09-30 Disjoncteur de branchement a declencheur electronique et a telecalibrage

Publications (2)

Publication Number Publication Date
EP0105786A1 EP0105786A1 (fr) 1984-04-18
EP0105786B1 true EP0105786B1 (fr) 1986-04-16

Family

ID=9278005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830401856 Expired EP0105786B1 (fr) 1982-09-30 1983-09-23 Disjoncteur de branchement à déclencheur électronique et à télécalibrage

Country Status (5)

Country Link
EP (1) EP0105786B1 (es)
DE (1) DE3363082D1 (es)
ES (1) ES526035A0 (es)
FR (1) FR2534063A1 (es)
PT (1) PT77372B (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1613016A (zh) 2001-12-28 2005-05-04 Abb技术股份公司 通过通信总线的低精度电压传感器的在线校准方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH393497A (de) * 1961-08-04 1965-06-15 Siemens Ag Uberstromschutz
US3538391A (en) * 1968-06-28 1970-11-03 Singer Co Electrical load control systems
FR2516303A1 (fr) * 1981-11-06 1983-05-13 Merlin Gerin Disjoncteur de branchement a basse tension equipe d'un commutateur de calibre telecommande
FR2516305A1 (fr) * 1981-11-06 1983-05-13 Merlin Gerin Disjoncteur de branchement a controle de la puissance souscrite par un module pilote

Also Published As

Publication number Publication date
FR2534063A1 (fr) 1984-04-06
ES8405193A1 (es) 1984-06-16
EP0105786A1 (fr) 1984-04-18
FR2534063B1 (es) 1984-11-23
PT77372B (fr) 1987-01-09
ES526035A0 (es) 1984-06-16
PT77372A (fr) 1983-10-01
DE3363082D1 (en) 1986-05-22

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