EP2490244B1 - Erdschluss-leistungstrenner - Google Patents

Erdschluss-leistungstrenner Download PDF

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Publication number
EP2490244B1
EP2490244B1 EP10823161.4A EP10823161A EP2490244B1 EP 2490244 B1 EP2490244 B1 EP 2490244B1 EP 10823161 A EP10823161 A EP 10823161A EP 2490244 B1 EP2490244 B1 EP 2490244B1
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EP
European Patent Office
Prior art keywords
sensitivity
delay time
switch
switching
setting portion
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.)
Not-in-force
Application number
EP10823161.4A
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English (en)
French (fr)
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EP2490244A1 (de
EP2490244A4 (de
Inventor
Hisanobu Asano
Yasumichi Okamoto
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.)
Fuji Electric FA Components and Systems Co Ltd
Original Assignee
Fuji Electric FA Components and Systems Co Ltd
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Publication date
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Publication of EP2490244A1 publication Critical patent/EP2490244A1/de
Publication of EP2490244A4 publication Critical patent/EP2490244A4/de
Application granted granted Critical
Publication of EP2490244B1 publication Critical patent/EP2490244B1/de
Not-in-force 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
    • 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
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • 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
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer

Definitions

  • the present invention relates to an earth leakage breaker which performs overcurrent protection and ground fault current protection in low-voltage power distribution systems.
  • An earth leakage breaker has a function for breaking an AC circuit upon occurrence of leaks, and prevents the occurrence of accidents in AC circuits.
  • Such an earth leakage breaker enables switching of the current sensitivity, which is the value of the leakage current at which the circuit breaking operation is performed, and switching of the time of delay time, which is a setting for the time of operation.
  • Such earth leakage breakers are broadly divided into domestic Japanese type earth leakage breakers, and foreign (European and American) type earth leakage breakers.
  • a domestic Japanese type earth leakage breaker is explained, referring to the drawings.
  • Fig. 7 shows the configuration of a conventional domestic type earth leakage breaker 10.
  • the earth leakage breaker 10 comprises a zero-phase sequence current transformer 11; a sensitivity switch setting portion 12; a filter circuit 13; a leakage detection portion 14; a delay time switch setting portion 15; and a tripping driving portion 16.
  • An earth leakage breaker 10 with such a circuit configuration operates as follows.
  • a main circuit conductor In the zero-phase sequence current transformer 11, a main circuit conductor, not shown, penetrates the core 11a, and when a ground fault current arising from a ground fault or similar, or a leakage current arising from a leak (hereafter these currents are called unbalanced currents), are included in the load current flowing in the main circuit conductor, a secondary output current signal proportional to the unbalanced current is output from the output windings 11b thereof. This secondary output current signal is input to the sensitivity switch setting portion 12.
  • detectable secondary output current signals can be switched and set in stages, from low sensitivity to high sensitivity.
  • a setting switch not shown, is used to switch the resistance connected across the output windings 11b. By thus changing the resistance value, the sensitivity is switched.
  • the sensitivity can be set in a sensitivity switching range of 100 mA/300 mA/500 mA, so that switch settings from normal sensitivity (100 mA) to low sensitivity (500 mA) can be made. However, a high sensitivity described below (30 mA) cannot be set.
  • the sensitivity switch setting portion 12 passes the secondary output current signal through the resistance with the value set by the sensitivity switch, and outputs a detection operation voltage signal.
  • the filter circuit 13 outputs a detection operation voltage signal obtained by eliminating noise components which may cause erroneous operation from the detection operation voltage signal output via the sensitivity switch setting portion 12.
  • the detection operation voltage signal with noise components eliminated is output to the leakage detection portion 14.
  • the leakage detection portion 14 outputs a driving voltage signal when the voltage value of an input detection operation voltage signal exceeds a threshold value determined in advance.
  • the driving voltage signal is output to the delay time switch setting portion 15.
  • the delay time switch setting portion 15 incorporates a delay time switch, not shown, which can switch and set a delay time; a plurality of charging resistors, which are switched according to the delay time switched and set by this delay time switch; and a charging circuit, which is charged with a charging current determined by these charging resistors.
  • a delay time is switched and set in advance by the delay time switch, a charging resistor is selected corresponding to this delay time and is connected to the charging circuit.
  • a driving voltage signal is input to the delay time switch setting portion 15, charging of the charging circuit is begun. At this time, the output from the charging circuit is not at a prescribed voltage for a charging interval equal to the delay time.
  • the delay time switch setting portion 15 ends charging of the charging circuit, and outputs a driving voltage signal which has reached the prescribed voltage to the tripping driving portion 16.
  • the tripping driving portion 16 drives an open/close mechanism for a contact of the main circuit, not shown, and opens the main circuit.
  • Such a domestic Japanese type earth leakage breaker 10 comprises a sensitivity switch setting portion 12 and delay time switch setting portion 15, and the sensitivity switch and delay time switch can each be set independently.
  • JIS C 8371 JIS C 8371
  • a non-delayed mode high-speed operation mode
  • an earth leakage breaker 10 for which the delay time can be set cannot be switched and set to high sensitivity (30 mA sensitivity) with the object of protecting humans.
  • a foreign (European and American) type earth leakage breaker combines a circuit breaker for wiring with an independent leakage protection unit with a separate structure.
  • Such a foreign (European and American) type earth leakage breaker is explained referring to the drawings.
  • Fig. 8 shows the configuration of a conventional foreign type earth leakage breaker.
  • the earth leakage breaker 20 comprises a zero-phase sequence current transformer 21; a sensitivity switch setting portion 22; a filter circuit 23; a leakage detection portion 24; a delay time switch setting portion 25; and a tripping driving portion 26.
  • An earth leakage breaker 20 with such a circuit configuration operates as follows.
  • a main circuit conductor In the zero-phase sequence current transformer 21, a main circuit conductor, not shown, penetrates the core 21a, and when an unbalanced current is included in the load current flowing in the main circuit conductor, a secondary output current signal proportional to the unbalanced current is output from the output windings 21b thereof. This secondary output current signal is input to the sensitivity switch setting portion 22.
  • a setting switch is used to switch the resistance connected across the output windings 21b. By thus changing the resistance value, the sensitivity can be switched and set in steps to sensitivities from high sensitivity to low sensitivity.
  • the sensitivity switch setting portion 22 passes the secondary output current signal through the resistance with the value set by the sensitivity switch, and outputs a detection operation voltage signal.
  • This sensitivity switch setting portion 22 comprises first and second circuits which perform sensitivity switching.
  • the first circuit is a circuit to perform sensitivity switching from high sensitivity to low sensitivity; the second circuit is a circuit to perform high-speed operation when set to high sensitivity, and to perform delay time operation in other cases.
  • the sensitivity switching range for the foreign type earth leakage breaker 20 shown in Fig. 8 is 30 mA/100 mA/300 mA/500 mA, and compared with the domestic type earth leakage breaker 10 shown in Fig. 7 , switching and setting at a higher sensitivity (30 mA) is possible. Further, when switching to and setting the high sensitivity (30 mA) using the first circuit, high-speed operation is forcibly set by the second circuit, and this forced high-speed signal (arrow ⁇ in Fig. 8 ) circumvents the filter circuit 23 and leakage detection portion 24, and is directly output to the delay time switch setting portion 25. The operation of the delay time switch setting portion 25 in this case is described below.
  • the sensitivity switch setting portion 22 outputs a forced high-speed signal (arrow ⁇ in Fig. 8 ) to the delay time switch setting portion 25 in the case of high sensitivity (30 mA), and in the case of another sensitivity (100 mA/300 mA/500 mA), outputs the detection operation voltage signal to the filter circuit 23.
  • the filter circuit 23 outputs a detection operation voltage signal obtained by eliminating noise components, which may cause erroneous operation, from the detection operation voltage signal output via the sensitivity switch setting portion 22.
  • the detection operation voltage signal with noise components eliminated is output to the leakage detection portion 24.
  • the leakage detection portion 24 outputs a driving voltage signal when the voltage value of an input detection operation voltage signal exceeds a threshold value determined in advance.
  • the driving voltage signal is output to the delay time switch setting portion 25.
  • the delay time switch setting portion 25 incorporates a delay time switch, not shown, which can switch and set a delay time; a plurality of charging resistors, which are switched according to the delay time switched and set by this delay time switch; and a charging circuit, which is charged with a charging current determined by these charging resistors.
  • a delay time is switched and set in advance by the delay time switch, a charging resistor is selected corresponding to this delay time and is connected to the charging circuit.
  • a driving voltage signal is input to the delay time switch setting portion 25, charging of the charging circuit is begun. At this time, the output from the charging circuit is not at a prescribed voltage for a charging interval equal to the delay time.
  • the delay time switch setting portion 25 ends charging of the charging circuit, and outputs a driving voltage signal which has reached the prescribed voltage to the tripping driving portion 26.
  • a driving voltage signal is immediately output to the tripping driving portion 26.
  • the tripping driving portion 26 drives an open/close mechanism for a contact of the main circuit, not shown, and opens the main circuit.
  • a foreign (European and American) type earth leakage breaker differs from a single-structure domestic type earth leakage breaker, in that switching to and setting of high sensitivity is possible in addition to switching to and setting of low sensitivity and normal sensitivity. And, when switching to and setting high sensitivity, high-speed operation is forcibly performed even in delay time switching. This is in conformance with standards (IEC947-2).
  • an earth leakage breaker is the invention disclosed in Patent Reference 2 (title of the invention: Earth leakage breaker).
  • Patent Reference 2 title of the invention: Earth leakage breaker.
  • this technology at the time of switching to and setting high sensitivity, a signal is output from a decoding circuit, and high-speed operation is forcibly switched to and set even in delay time switching.
  • an earth leakage breaker is the invention disclosed in Patent Reference 3 (title of the invention: Earth leakage breaker).
  • this technology by means of a dial type switch setting, both sensitivity current switching and time limit switching are performed.
  • the domestic type earth leakage breaker 10 of Fig. 7 above is a structure which integrally includes a sensitivity switch setting portion 12 and a delay time switch setting portion 15, but has not been configured to switch to and set high-speed operation simultaneously with switching to and setting of high sensitivity, as in foreign type devices.
  • an earth leakage breaker which, like the foreign type earth leakage breaker 20 of Fig. 8 , enables selection of high-speed operation and delay time operation as well as enabling settings from high sensitivity to low sensitivity, and in which, when setting high sensitivity, forcibly switches to and sets high-speed operation as the delay time setting.
  • a forcible high-speed signal of small amplitude passes through the pattern wiring connecting the sensitivity switch setting portion 22 and the delay time switch setting portion 25.
  • a signal with small amplitude is easily affected by noise, and so an anti-noise measure is necessary, and the wiring pattern becomes complicated.
  • the earth leakage breaker of Patent Reference 1 sets high-speed operation by means of on/off judgment of a pushbutton high-speed switch, and uses electric signals, but cannot completely eliminate the influence of noise.
  • the earth leakage breaker of Patent Reference 2 makes settings using a logic decoding circuit, and uses electric signals, but cannot completely eliminate the influence of noise.
  • the earth leakage breaker of Patent Reference 3 enables selection of normal-speed operation and high-speed operation by mechanical setting means, but does not forcibly set the delay time setting to high-speed operation even when high sensitivity is set, and so a safety-related problem remains.
  • this invention has as an object the provision of an earth leakage breaker in which, by means of mechanical settings with a simple configuration, high-speed operation is forcibly set simultaneously with setting the detection sensitivity from low sensitivity to high sensitivity.
  • a first mode of an earth leakage breaker of this invention is characterized in comprising:
  • an earth leakage breaker can be provided in which detection sensitivity can be set from low sensitivity to high sensitivity by means of a mechanical setting with a simple configuration, and high-speed operation is simultaneously forcibly set.
  • an earth leakage breaker 100 comprises a zero-phase sequence current transformer 110; a sensitivity switch setting portion 120; a filter circuit 130; a leakage detection portion 140; a delay time switch setting portion 150; a tripping driving portion 160; and a restriction setting portion 170.
  • the earth leakage breaker 100 of this embodiment also has features which are redundant with the prior art, but to facilitate explanation these are explained once again.
  • the earth leakage breaker 100 with this circuit configuration operates as follows.
  • a main circuit conductor In the zero-phase sequence current transformer 110, a main circuit conductor, not shown, penetrates a core 110a; when the load current flowing in the main circuit conductor includes an unbalanced current, a secondary output current signal proportional to the unbalanced current is output from the output windings 110b. This secondary output current signal is input to the sensitivity switch setting portion 120.
  • the sensitivity switch setting portion 120 comprises a sensitivity switching slide switch 121 (see Fig. 3 ) which performs switching and setting of the sensitivity.
  • the sensitivity switching slide switch 121 is linked with the restriction setting portion 170.
  • the sensitivity switch setting portion 120 is configured so as to enable changing of resistance values by switching the resistor connected across the output windings 110b by means of the sensitivity switching slide switch 121, to switch and set the sensitivity in stages from high sensitivity to low sensitivity. And, the sensitivity switch setting portion 120 passes the secondary output current signal through the switched and set resistor and outputs a detection operation voltage signal.
  • the sensitivity switching range over which this sensitivity switch setting portion 120 can switch the sensitivity is set to 30 mA/100 mA/300 mA/500 mA.
  • the filter circuit 130 outputs a detection operation voltage signal obtained by eliminating noise components, which can cause erroneous operation, from the detection operation voltage signal output via the sensitivity switch setting portion 120.
  • the detection operation voltage signal with noise components eliminated is output to the leakage detection portion 140.
  • the leakage detection portion 140 When the voltage value of the input detection operation voltage signal exceeds a threshold value determined in advance, the leakage detection portion 140 outputs a driving voltage signal. This driving voltage signal is output to the delay time switch setting portion 150.
  • the delay time switch setting portion 150 incorporates a delay time switching slide switch 151 (see Fig. 3 ); a plurality of charging resistors; and a charging circuit (as a specific example, a capacitor).
  • the delay time switching slide switch 151 enables switching and setting of the delay time.
  • the plurality of charging resistors are switched according to the delay time set by the delay time switching slide switch 151.
  • the charging circuit is charged by the charging current decided by the selected charging resistor.
  • the delay time switch setting portion 150 when a delay time is switched and set in advance by the delay time switching slide switch 151, the charging resistor corresponding to the delay time is selected and is connected to the charging circuit.
  • the delay time switch setting portion 150 comprises a high-speed conduction portion which directly connects the leakage detection portion 140 and the tripping driving portion 160, and selects the high-speed conduction portion during high-speed operation, described below.
  • the tripping driving portion 160 drives the open/close mechanism of the main circuit contact, not shown, and opens the main circuit.
  • the restriction setting portion 170 mechanically links the sensitivity switching of the sensitivity switch setting portion 120 and the delay time switching of the delay time switch setting portion 150, and by restricting the delay time switching range during delay time switching of the delay time switch setting portion 150 according to the sensitivity switching of the sensitivity switch setting portion 120, decides the operation speeds which can be set for the sensitivity. And, when the sensitivity switch setting portion 120 is set to high sensitivity, the restriction setting portion 170 sets and restricts the delay time switch setting portion 150 to high-speed operation only.
  • the dashed-line arrows A and B in Fig. 1 indicate that the restriction setting portion 170 mechanically restricts the sensitivity switch setting portion 120 and the delay time switch setting portion 150.
  • the sensitivity can be set in the stages 30 mA/100 mA/300 mA/500 mA by the sensitivity switch setting portion 120, and moreover the delay time can be set in the stages 0 ms/200 ms/500 ms/1000 ms by the delay time switch setting portion 150.
  • a restriction setting portion 170 is provided which mechanically links and manipulates the sensitivity switch setting portion 120 and the delay time switch setting portion 150, so that high-speed operation (0 ms) is set mechanically by the delay time switch setting portion 150, in particular when the sensitivity switch setting portion 120 executes setting at a high sensitivity (30mA).
  • the sensitivity switch setting portion 120 comprises a sensitivity switching slide switch 121.
  • the delay time switch setting portion 150 comprises a delay time switching slide switch 151.
  • the sensitivity switch setting portion 120 and delay time switch setting portion 150 are fixed on a printed board 180 and are electrically connected by a wiring pattern.
  • the restriction setting portion 170 further comprises a sensitivity switch extension setting portion 171 and a delay time switch extension setting portion 172.
  • the sensitivity switch extension setting portion 171 comprises a protruding portion 171a; a sensitivity switch extension slide switch 171b; and a sensitivity switch intermediate adapter 171c.
  • the sensitivity switch extension slide switch 171b is mounted, via a linking mechanism within the sensitivity switch intermediate adapter 171c, onto the sensitivity switching slide switch 121.
  • the sensitivity switching slide switch 121 of the sensitivity switch setting portion 120 also moves in the direction of arrow a (or in the direction of arrow b) via the linking mechanism within the sensitivity switch intermediate adapter 171c.
  • the delay time switch extension setting portion 172 is mounted above the delay time switch setting portion 150.
  • the mounted state is as shown in Fig. 4 .
  • the delay time switch extension setting portion 172 comprises an abutting portion 172a; a delay time switch extension slide switch 172b; and a delay time switch intermediate adapter 172c.
  • the delay time switch extension slide switch 172b is mounted, via a linking mechanism within the delay time switch intermediate adapter 172c, onto the delay time switching slide switch 151.
  • the delay time switching slide switch 151 of the delay time switch setting portion 150 also moves in the direction of arrow a (or in the direction of arrow b) in Fig. 3 , via the linking mechanism within the delay time switch intermediate adapter 172c.
  • the protruding portion 171a is provided protruding from the sensitivity switch extension slide switch 171b.
  • the protruding portion 171a is mechanically connected to the sensitivity switch extension slide switch 171b, a portion thereof is positioned on the line of action of the delay time switch extension slide switch 172b, and moves together with movement in the direction of arrow a of the sensitivity switch extension slide switch 171b, to abut the abutting portion 172a of the delay time switch extension slide switch 172b. Further, when the sensitivity switch extension slide switch 171b is moved in the direction of arrow a, together with movement of the sensitivity switch extension slide switch 171b, the protruding portion 171a moves the delay time switch extension slide switch 172b.
  • this restriction setting portion 170 By means of this restriction setting portion 170, the settings of the sensitivity switch setting portion 120 and the delay time switch setting portion 150 are restricted. Specifically, as shown in Fig. 5A , when the sensitivity switch extension slide switch 171b is at the lowest sensitivity (500 mA, on the bottom in Fig. 5A and Fig. 5B ), the protruding portion 171a is also at the lowest position, so that the delay time switch extension slide switch 172b is not restricted, and can move in the direction of the arrow c, and the desired delay time (0 ms/200 ms/500 ms/1000 ms) can be selected.
  • the high-speed conduction portion is selected by the delay time switch setting portion 150, and the leakage detection portion 140 and tripping driving portion 160 are directly connected.
  • the delay time switch setting portion 150 outputs the driving voltage signal to the tripping driving portion 160. In this way, circuit breaking is performed by high-speed operation.
  • a path is selected by the delay time switch setting portion 150 passing through a charging resistor and the charging circuit.
  • the driving voltage signal output from the leakage detection portion 140 is applied to the charging resistor, a charging current is output, and when this charging current is input to the charging circuit, charging of the charging circuit is begun.
  • the delay time switch setting portion 150 ends charging of the charging circuit after the delay time has elapsed from the start of charging of the charging circuit, and the driving voltage signal, which has reached a prescribed voltage, is output to the tripping driving portion 160. In this way, circuit breaking is performed with delay time operation.
  • the protruding portion 171a also moves in the direction of the arrow d and abuts the abutting portion 172a of the delay time switch extension slide switch 172b, moving the delay time switch extension slide switch 172b.
  • the delay time switch extension slide switch 172b is restricted to the highest delay time (0 ms), and is forcibly set to high-speed operation.
  • the fastest conducting portion is selected within the delay time switch setting portion 150.
  • the driving voltage signal output from the leakage detection portion 140 is input without modification to the tripping driving portion 160.
  • Table 1 a correspondence table between setting positions of the sensitivity switching slide switch 121 and the delay time switching slide switch 151 (which is also a correspondence table between setting positions of the sensitivity switch extension slide switch 171b and the delay time switch extension slide switch 172b) is shown.
  • Table 1 Setting position of sensitivity switching slide switch (mA) Setting position of delay time switching slide switch (ms) 0 (high speed) 200 500 1000 30 ⁇ ⁇ ⁇ ⁇ 100 ⁇ ⁇ ⁇ ⁇ 200 ⁇ ⁇ ⁇ 500 ⁇ ⁇ ⁇ ⁇
  • the delay time switching slide switch 151 when using the sensitivity switching slide switch 121 the low sensitivity of 500 mA is set, all the delay times, 0 ms, 200 ms, 500 ms, and 1000 ms, can be set by the delay time switching slide switch 151. And, when the normal sensitivity of 100 mA is set using the sensitivity switching slide switch 121, the two delay times of 0 ms and 200 ms can be set by the delay time switching slide switch 151. That is, to the extent that the sensitivity switching slide switch 121 moves, the delay time switching slide switch 151 can be moved. And, when the sensitivity switching slide switch 121 is used to set the high sensitivity of 30 mA, the delay time switching slide switch 151 can set only high-speed operation with a delay time of 0 ms.
  • the sensitivity switch setting portion 120 is a switch employing a single circuit, so that compared with a sensitivity switch setting portion employing a dual-circuit switch of the prior art, compactness and low cost are realized. Further, setting is performed only by mechanical means, so that a pattern connecting the sensitivity switch setting portion 120 and delay time switch setting portion 150 is eliminated, and the wiring pattern is reduced and simplified.
  • an earth leakage breaker can be provided which enables setting of the detection sensitivity from low sensitivity to high sensitivity, and which forcibly sets high-speed operation by a mechanical operation.
  • This invention can be applied as an earth leakage breaker which realizes overcurrent protection functions and ground-fault current protection functions in low-voltage wiring systems in particular.

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  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (1)

  1. Fehlerstromschutzschalter, umfassend:
    einen Nullkomponentenstrom- (110) -Wandler, der ein sekundäres Ausgangsstromsignal proportional zu dem unsymmetrischen Strom ausgibt, der in einem Laststrom eines durchdringenden Hauptstromkreisleiters beinhaltet ist;
    einen Empfindlichkeitsschaltereinstellungs- (120) - Abschnitt, bei dem die Empfindlichkeit in mehreren Stufen von einer hohen Empfindlichkeit zu einer niedrigen Empfindlichkeit umgeschaltet wird und der das Sekundärausgangsstromsignal bei einem Widerstand weitergibt, der durch die Empfindlichkeit eingestellt ist, um zu bewirken, dass ein Erkennungsoperations-Spannungssignal ausgegeben wird;
    eine Filter- (130) -Schaltung, die ein Erkennungsoperations-Spannungssignal ausgibt, das durch Eliminieren von Rauschanteilen vom Erkennungsoperations-Spannungssignal erhalten wurde, welches vom Empfindlichkeitsschaltereinstellungsabschnitt ausgegeben wurde;
    einen Fehlerstromerkennungs- (140) -Abschnitt, welcher ein Steuerspannungssignal ausgibt, wenn ein Spannungswert des Erkennungsoperations-Spannungssignals, von dem Rauschanteile eliminiert wurden, einen vorbestimmten Schwellwert überschreitet;
    einen Verzögerungszeitschaltereinstellungs- (150) - Abschnitt, der eine Verzögerungszeitumschaltung in mehreren Stufen von Hochgeschwindigkeitsbetrieb bis zu Verzögerungszeitbetrieb ausführt, und der während des Hochgeschwindigkeitsbetriebs ein Steuerspannungssignal unmittelbar nach dem Eingang des Steuerspannungssignals ausgibt, und der während des Verzögerungszeitbetriebs das Steuerspannungssignal ausgibt, nachdem eine voreingestellte Verzögerungszeit nach dem Eingang des Steuerspannungssignals abgelaufen ist;
    einen Auslösungsansteuer- (160) -Abschnitt, welcher einen Öffnungs-/Schließmechanismus eines Hauptstromkreiskontaktes ansteuert und den Hauptstromkreis öffnet,
    gekennzeichnet durch
    einen Begrenzungseinstellungsabschnitt, der bewirkt, dass die Empfindlichkeitsumschaltung des Empfindlichkeitsschaltereinstellungsabschnitts und die Verzögerungszeitumschaltung des Verzögerungszeitschaltereinstellungsabschnitts mechanisch verknüpft sind, und der durch das Begrenzen eines Verzögerungszeitumschaltungsbereichs der Verzögerungszeitumschaltung des Verzögerungszeitschaltereinstellungsabschnitts gemäß der Empfindlichkeitsumschaltung des Empfindlichkeitsschaltereinstellungsabschnitts einstellbare Schaltgeschwindigkeiten für eine Empfindlichkeit bestimmt, und der den Verzögerungszeitschaltereinstellungsabschnitt auf nur Hochgeschwindigkeitsbetrieb begrenzt, wenn der Empfindlichkeitsschaltereinstellungsabschnitt eine hohe Empfindlichkeit einstellt,
    wobei der Begrenzungseinstellungsabschnitt umfasst:
    einen Empfindlichkeitsschaltererweiterungseinstellungs-(171) -Abschnitt, der einen Empfindlichkeitsumschaltungserweiterungs-Schiebeschalter aufweist, der mit einem Empfindlichkeitsumschaltungs-Schiebeschalter des Empfindlichkeitsschaltereinstellungsabschnitts verbunden ist, und der diesen Empfindlichkeitsumschaltungs-Schiebeschalter bewegt;
    einen Verzögerungszeitumschaltungserweiterungseinstellungs-(172) -Abschnitt, der einen Verzögerungszeitumschaltungserweiterungs-Schiebeschalter aufweist, der mit einem Verzögerungszeitumschaltungs-Schiebeschalter des Verzögerungszeitschaltereinstellungsabschnitts verbunden ist, und der diesen Verzögerungszeitumschaltungs-Schiebeschalter bewegt; und
    einen vorstehenden (171a) Abschnitt, der mechanisch mit dem Empfindlichkeitsumschaltungserweiterungs-Schiebeschalter verbunden ist, wobei ein Abschnitt davon auf einer Kraftangriffslinie des Verzögerungszeitumschaltungserweiterungs-Schiebeschalters positioniert ist, und der des Weiteren mittels Bewegung gemäß Bewegung des Empfindlichkeitsumschaltungserweiterungs-Schiebeschalter den Verzögerungszeitumschaltungserweiterungs-Schiebeschalter drückt oder die Bewegung des Verzögerungszeitumschaltungserweiterungs-Schiebeschalters begrenzt.
EP10823161.4A 2009-10-14 2010-09-10 Erdschluss-leistungstrenner Not-in-force EP2490244B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009237093A JP5310463B2 (ja) 2009-10-14 2009-10-14 漏電遮断器
PCT/JP2010/005538 WO2011045892A1 (ja) 2009-10-14 2010-09-10 漏電遮断器

Publications (3)

Publication Number Publication Date
EP2490244A1 EP2490244A1 (de) 2012-08-22
EP2490244A4 EP2490244A4 (de) 2014-06-11
EP2490244B1 true EP2490244B1 (de) 2015-10-21

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EP10823161.4A Not-in-force EP2490244B1 (de) 2009-10-14 2010-09-10 Erdschluss-leistungstrenner

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EP (1) EP2490244B1 (de)
JP (1) JP5310463B2 (de)
KR (1) KR101258393B1 (de)
CN (1) CN102687229B (de)
WO (1) WO2011045892A1 (de)

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EP2490244A1 (de) 2012-08-22
CN102687229A (zh) 2012-09-19
JP5310463B2 (ja) 2013-10-09
EP2490244A4 (de) 2014-06-11
KR20120058601A (ko) 2012-06-07
KR101258393B1 (ko) 2013-04-30
JP2011086434A (ja) 2011-04-28
WO2011045892A1 (ja) 2011-04-21
CN102687229B (zh) 2014-10-29

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