EP0105786A1 - Abzweigschalter mit einem elektronischen Auslöser und einer ferngesteuerten Einstellung - Google Patents

Abzweigschalter mit einem elektronischen Auslöser und einer ferngesteuerten Einstellung Download PDF

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Publication number
EP0105786A1
EP0105786A1 EP19830401856 EP83401856A EP0105786A1 EP 0105786 A1 EP0105786 A1 EP 0105786A1 EP 19830401856 EP19830401856 EP 19830401856 EP 83401856 A EP83401856 A EP 83401856A EP 0105786 A1 EP0105786 A1 EP 0105786A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
circuit
switch
resistor
resistance
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.)
Granted
Application number
EP19830401856
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English (en)
French (fr)
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EP0105786B1 (de
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
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0105786A1 publication Critical patent/EP0105786A1/de
Application granted granted Critical
Publication of EP0105786B1 publication Critical patent/EP0105786B1/de
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

  • French patent application No. 81 20992 dated 6-11-1981 relates to a circuit breaker of the type 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.
  • French patent application 81 20991 of 6-11-81 solved the telecalibration problem by keeping all the organs of the circuit breaker tripping module and by providing a second power monitoring module subscribed to by the counter. subscriber. This powerful device with two electronic modules is nevertheless complicated and expensive.
  • 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 branch circuit breaker according to the invention is characterized in that the resistive bridge of the circuit breaker is formed by a series resistor and a shunt resistor and that the remote control circuit includes a CM 1 gauge switch electrically connected to the resistive bridge by a circuit 40, 42 likely to cause the variation of the shunt resistance by actuation of the CM 1 caliber switch ⁇
  • 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 CM 1 caliber switch of the remote control circuit cooperates with a plurality of selection pads A, B, C authorizing the series connection with the resistance of a variable resistance loop between zero and infinity according to the position of the switch CM 1 , the maximum rating corresponding to position A of the switch CM 1 for setting. short-circuit of the connecting conductors, the lower gauge occurring on the pad C corresponding to an infinite resistance of the loop and the absence of a shunt resistance, while the intermediate gauge operates on the pad B by insertion of a predetermined resistance.
  • FIG. 1 a four-pole connection circuit breaker 10 electrically connected 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 with a distribution company.
  • the counter 11 is housed in an external electrical box accessible to the distributor, while the circuit breaker 10 is arranged in the subscriber's room, separated from the box by a certain distance.
  • Circuit breaker j0 can be of the bipolar type in the case of a single-phase distribution with neutral.
  • the connection circuit breaker 10 is of multiple ratings and includes an operating mechanism 12 for 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 model 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 in the event that the selected rating corresponding to the power subscribed by the subscriber.
  • the electronic module 26 for controlling the circuit breaker 10 is of its own current of the type described in French patent No. 81 05153 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 of 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 1 and capacitor C 2 connected to the positive entry.
  • a discharge circuit with resistance R 2 and diode D2 is connected in parallel across the terminals of the capacitor C 2 to provide temperature compensation.
  • the output of the amplifier AO 1 is connected by a diode D 6 to the trigger of a thyristor Th 1 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 C 2 exceeds the value of the voltage applied to the negative input, amplifier AO 1 is released to start thyristor Th 1 , which becomes conductive causing tripping of the circuit breaker .
  • the first operational amplifier AO 1 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 AO 2 is polarized in an analogous manner by a bias 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 AO 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 10 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 via a series resistor R 9 , 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 R 9 and the cathode of the Zener diode 1 to prevent the discharge of the capacitor C 1 in the resistive bridge 32.
  • the remote control circuit 34 (fig.
  • 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 triggering voltage.
  • the injection circuit 50 is equipped with a power supply 52 and an auxiliary switch CM 2 , the commissioning of which ensures remote tripping of the circuit breaker 10.
  • the resistance of the loop 46 can be checked by means of a measuring device 54 connected to circuit 34 either permanently or temporarily. It is noted that the resistive bridge 32 voltage divider is formed by the resistors R 9 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 R 9 .
  • the change in rating by the switch CM 1 is remotely controlled by the agent from the circuit 34 thanks to 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 1 does not hinder 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 10 and to detect any fraud.
  • the switch CM 1 When the power subscribed by the subscriber does not correspond to the rating displayed by the switch CM 1 , 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 A0 2 . This results in the opening of the contacts 16 of the circuit breaker 10 and the interruption of the supply of electricity to the subscriber.
  • the connection is locked as long as the caliber switch CM 1 remains on the pad 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 cali - Local brat breaker. independently of telecalibration by circuit 34.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Keying Circuit Devices (AREA)
EP19830401856 1982-09-30 1983-09-23 Abzweigschalter mit einem elektronischen Auslöser und einer ferngesteuerten Einstellung Expired EP0105786B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=9278005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830401856 Expired EP0105786B1 (de) 1982-09-30 1983-09-23 Abzweigschalter mit einem elektronischen Auslöser und einer ferngesteuerten Einstellung

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056350A1 (en) * 2001-12-28 2003-07-10 Abb T&D Technology Ltd. A method for on-line calibration of low accuracy voltage sensor through communication bus

Citations (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
EP0079271A1 (de) * 1981-11-06 1983-05-18 Merlin Gerin Abzweigschalter mit Leistungskontrolle durch einen Steuermodul
EP0079270A1 (de) * 1981-11-06 1983-05-18 Merlin Gerin Niederspannungsabzweigschalter mit einem ferngesteuerten Einstellschalter

Patent Citations (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
EP0079271A1 (de) * 1981-11-06 1983-05-18 Merlin Gerin Abzweigschalter mit Leistungskontrolle durch einen Steuermodul
EP0079270A1 (de) * 1981-11-06 1983-05-18 Merlin Gerin Niederspannungsabzweigschalter mit einem ferngesteuerten Einstellschalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056350A1 (en) * 2001-12-28 2003-07-10 Abb T&D Technology Ltd. A method for on-line calibration of low accuracy voltage sensor through communication bus
US7129688B2 (en) 2001-12-28 2006-10-31 Abb Technology Ag Method for on-line calibration of low accuracy voltage sensor through communication bus

Also Published As

Publication number Publication date
ES8405193A1 (es) 1984-06-16
PT77372B (fr) 1987-01-09
EP0105786B1 (de) 1986-04-16
FR2534063B1 (de) 1984-11-23
FR2534063A1 (fr) 1984-04-06
PT77372A (fr) 1983-10-01
ES526035A0 (es) 1984-06-16
DE3363082D1 (en) 1986-05-22

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