WO2010037578A1 - Device and method for limiting the rail potential in a dc railway - Google Patents

Device and method for limiting the rail potential in a dc railway Download PDF

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Publication number
WO2010037578A1
WO2010037578A1 PCT/EP2009/059566 EP2009059566W WO2010037578A1 WO 2010037578 A1 WO2010037578 A1 WO 2010037578A1 EP 2009059566 W EP2009059566 W EP 2009059566W WO 2010037578 A1 WO2010037578 A1 WO 2010037578A1
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WO
WIPO (PCT)
Prior art keywords
rail
switching device
control unit
contactor coil
connecting line
Prior art date
Application number
PCT/EP2009/059566
Other languages
German (de)
French (fr)
Inventor
Gerd Hein
Georg Kuderewski
Alexander Schomburg
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP09781040A priority Critical patent/EP2328776A1/en
Priority to CN200980144224.7A priority patent/CN102209648B/en
Publication of WO2010037578A1 publication Critical patent/WO2010037578A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M5/00—Arrangements along running rails or at joints thereof for current conduction or insulation, e.g. safety devices for reducing earth currents
    • B60M5/02—Means for reducing potential difference between rail and adjacent ground
    • 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
    • H02H3/14—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 occurrence of voltage on parts normally at earth potential
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device

Definitions

  • the invention relates to a device for limiting the rail potential in a DC track, wherein a low-impedance connecting line between the rail and the building earth is arranged and wherein in the connecting line a switching device is integrated, which is connected via a control line to a control unit, the is in communication with a arranged between the rail and the building earth voltmeter.
  • the invention also relates to a method for limiting the rail potential in a DC track with such a device.
  • the electrical potential of the rail shall not exceed a given maximum value to ensure that contact with the rail is not hazardous to persons. It has therefore already been proposed to switch a connection from the rail to the building earth, if the rail potential is too high.
  • mechanical switching devices so-called short-circuiters, are used, which must meet high requirements. For example, it must be possible for such a short-circuiter to be switched more than 10 times in one hour. In addition, it must withstand a current of 400 A and switch within 250 ms. The actual switching process must be done even faster because within the 250 ms also measured the voltage between the rail and the building earth, compared with a threshold and must be controlled at too high a voltage of the short circuiter.
  • the invention has for its object to provide a device and a method for limiting the rail potential in a DC track, the elements manage without complex Bauele- and still prevent high rail potential, which can be dangerous for people to prevent timely and very quickly.
  • the object to provide a suitable device is achieved according to the invention in that the switching device a
  • the contactor coil With the contactor coil, the advantage is achieved that they can operate the switching device quickly and reliably without equipment expense. With the dynamic control unit connected to the contactor coil, the particular advantage is achieved that a too high voltage is detected very quickly and that then immediately the contactor coil is active.
  • the contactor coil is energized when the connection line is interrupted and it is assigned to the contactor coil a Entschreib unit, which is connected via the control line to the control unit.
  • a contactor coil switched in this way the particular advantage is achieved that the switching device can be switched quickly and reliably without special additional components. This is due, among other things, to the fact that the switching device is open as long as the contactor coil is traversed by a current. If then in the short term at a high voltage between the rail and the building earth, the current in the coil is reduced, closes the switching device using a mechanical clamping unit, the z. B. is a mechanical spring. The unwanted dangerously high rail potential is then dissipated.
  • a current meter is integrated, via the control unit with a in a supply line of the contactor coil integrated relay is in communication. This provides the additional advantage that the contactor coil remains de-energized and thus the switching device remains open as long as a current still flows through the connection line from the rail to the building earth.
  • Switching device is thus controlled not only by the voltmeter, but also by the current meter, which is located in the connecting line itself. This avoids too high and dangerous rail potential with particularly simple means.
  • the object of specifying a suitable method for limiting the rail potential in a DC track is achieved with said device in that when the voltage between the rail and the building earth a
  • Threshold exceeds the switching device closes, thereby switching the connecting line conductive. This is advantageous in a very short time possible, since the device is used according to the invention.
  • the switching device remains closed for at least a predetermined period of time and, moreover, until the current intensity in the connecting line falls below a threshold value.
  • This achieves the advantage that the switching device is not reopened too soon and that, in particular, an alternating rapid closing and opening is avoided, which could lead to damage.
  • the switching device is closed and always remains closed for the predetermined fixed period of time. If, at the end of this period, the current in the connecting line has not fallen below a threshold value, the switching device remains closed. It is only opened when the current has fallen below its threshold value.
  • the switching device closes when the voltage between the rail and the building earth for the duration of 0.5 ms has exceeded the threshold, at the latest within a further 19 ms. This provides the advantage that a too high rail potential is dissipated within less than 20 ms. It can then come to a risk to persons. In addition, no complex components for the device are required.
  • the advantage is achieved that with simple means in a very short time the rail potential can be reduced in order to exclude a risk to persons.
  • the drawing shows roughly schematically a circuit diagram for such a device.
  • a voltmeter 3 which is connected via a dynamic control unit 4 to a de-energizing unit 5 of a contactor coil 6, which, as long as it is traversed by a current, is a switching device 7 in a connection between a rail 1 of a direct current track and the building earth 2. connecting line 8 between the rail 1 and the building earth 2 keeps open.
  • the contactor coil 6 works similar to an electromagnet.
  • the contactor coil 6 is de-energized via the control unit 4 and the de-excitation unit 5, so that, e.g. B. via a mechanical spring, the switching device 7 is closed.
  • connection line 8 is a current meter 9, which is connected via the control unit 4 with a relay 10 in the outgoing from an energy source 11 power supply line of the contactor coil 6.
  • the control unit 4 and the de-excitation unit 5 as soon as the voltage measured by the voltmeter 3 exceeds a threshold value, the contactor coil 6 is first deactivated for a predetermined, fixed period of time and thereby the switching device 7 is closed. At the end of this period, it is examined whether the current intensity measured by the current meter 9 has fallen below a threshold value. If this is not the case, the contactor coil 6 remains deactivated and the switching device 7 remains closed. Only when the current falls below the threshold, the switching device 7 is opened.
  • the control unit 4, which is a dynamic driving device, and the de-excitation unit 5 allow, when the voltage between the rail 1 and the building earth 2, which is measured by the voltmeter 3, for the duration of
  • the switching device 7 closes and derives the unwanted high rail potential.
  • a particularly safe circuit is given.
  • the device is smaller than previously used devices, so that it takes up less space and is cheaper to create.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

The invention relates to a device and a method for limiting the rail potential in a DC railway, a low-impedance link (8) being arranged between the rail (1) and the ground (2) below the structure. A switchgear (7) which is connected to a control unit (4) via a control line is connected to the link (8), while the control unit (4) is connected to a voltmeter (3) that is arranged between the rail (1) and the ground (2) below the structure. According to the invention, the switchgear (7) comprises a contactor coil (6) that is connected to a dynamic control unit (4). The switchgear (7) closes and thus connects the link (8) in a conducting manner when the voltage between the rail (1) and the ground (2) below the structure exceeds a threshold value.

Description

Beschreibungdescription
Vorrichtung und Verfahren zur Begrenzung des Schienenpotenzials bei einer GleichstrombahnDevice and method for limiting the rail potential in a DC track
Die Erfindung betrifft eine Vorrichtung zur Begrenzung des Schienenpotenzials bei einer Gleichstrombahn, wobei eine nie- derohmige Verbindungsleitung zwischen der Schiene und der Bauwerkserde angeordnet ist und wobei in die Verbindungslei- tung ein Schaltgerät eingebunden ist, das über eine Steuerleitung mit einer Steuereinheit verbunden ist, die mit einem zwischen der Schiene und der Bauwerkserde angeordneten Spannungsmesser in Verbindung steht.The invention relates to a device for limiting the rail potential in a DC track, wherein a low-impedance connecting line between the rail and the building earth is arranged and wherein in the connecting line a switching device is integrated, which is connected via a control line to a control unit, the is in communication with a arranged between the rail and the building earth voltmeter.
Die Erfindung betrifft auch ein Verfahren zur Begrenzung des Schienenpotenzials bei einer Gleichstrombahn mit einer solchen Vorrichtung.The invention also relates to a method for limiting the rail potential in a DC track with such a device.
Bei einer Gleichstrombahn darf das elektrische Potenzial der Schiene einen vorgegebenen Höchstwert nicht überschreiten, um zu gewährleisten, dass ein Berühren der Schiene für Personen ungefährlich ist. Es ist daher bereits vorgeschlagen worden, eine Verbindung von der Schiene zur Bauwerkserde zu schalten, wenn das Schienenpotenzial zu hoch ist. Dazu werden mechani- sehe Schaltgeräte, so genannte Kurzschließer, eingesetzt, die hohen Anforderungen genügen müssen. Beispielsweise muss es möglich sein, dass ein solcher Kurzschließer mehr als 10 mal in einer Stunde geschaltet wird. Außerdem muss er einer Stromstärke von 400 A standhalten und innerhalb von 250 ms schalten. Der eigentliche Schaltvorgang muss dabei noch schneller erfolgen, weil innerhalb der 250 ms auch noch die Spannung zwischen der Schiene und der Bauwerkserde gemessen, mit einem Schwellwert verglichen und bei einer zu hohen Spannung der Kurzschließer angesteuert werden muss.In the case of a DC rail, the electrical potential of the rail shall not exceed a given maximum value to ensure that contact with the rail is not hazardous to persons. It has therefore already been proposed to switch a connection from the rail to the building earth, if the rail potential is too high. For this purpose, mechanical switching devices, so-called short-circuiters, are used, which must meet high requirements. For example, it must be possible for such a short-circuiter to be switched more than 10 times in one hour. In addition, it must withstand a current of 400 A and switch within 250 ms. The actual switching process must be done even faster because within the 250 ms also measured the voltage between the rail and the building earth, compared with a threshold and must be controlled at too high a voltage of the short circuiter.
Da übliche Schaltgeräte zu langsam reagieren, war es bisher notwendig, dass das Schaltgerät mit aufwändigen und teuren Bauelementen, z. B. mit Thyristoren, ausgestattet ist. Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung und ein Verfahren zur Begrenzung des Schienenpotenzials bei einer Gleichstrombahn anzugeben, die ohne aufwändige Bauele- mente auskommen und trotzdem ein hohes Schienenpotenzial, das für Personen gefährlich sein kann, rechtzeitig und sehr schnell verhindern.Since conventional switching devices react too slowly, it was previously necessary that the switching device with complex and expensive components, such. B. with thyristors equipped. The invention has for its object to provide a device and a method for limiting the rail potential in a DC track, the elements manage without complex Bauele- and still prevent high rail potential, which can be dangerous for people to prevent timely and very quickly.
Die Aufgabe, eine geeignete Vorrichtung anzugeben, wird gemäß der Erfindung dadurch gelöst, dass das Schaltgerät eineThe object to provide a suitable device is achieved according to the invention in that the switching device a
Schützspule aufweist, die mit einer dynamischen Steuereinheit (Ansteuereinheit) verbunden ist.Contactor coil which is connected to a dynamic control unit (drive unit).
Mit der Schützspule wird der Vorteil erzielt, dass sie ohne apparativem Aufwand das Schaltgerät schnell und zuverlässig bedienen kann. Mit dem dynamischen Ansteuergerät, das mit der Schützspule verbunden ist, wird der besondere Vorteil erzielt, dass eine zu hohe Spannung sehr schnell erkannt wird und dass dann auch sofort die Schützspule aktiv wird.With the contactor coil, the advantage is achieved that they can operate the switching device quickly and reliably without equipment expense. With the dynamic control unit connected to the contactor coil, the particular advantage is achieved that a too high voltage is detected very quickly and that then immediately the contactor coil is active.
Beispielsweise ist die Schützspule bei unterbrochener Verbindungsleitung erregt und es ist der Schützspule eine Entre- gungseinheit zugeordnet, die über die Steuerleitung mit der Steuereinheit verbunden ist. Mit einer in dieser Weise ge- schalteten Schützspule wird der besondere Vorteil erzielt, dass das Schaltgerät ohne besondere zusätzliche Bauelemente schnell und zuverlässig geschaltet werden kann. Das ist unter anderem darauf zurückzuführen, dass das Schaltgerät geöffnet ist, solange die Schützspule von einem Strom durchflössen ist. Wenn dann kurzfristig bei einer zu hohen Spannung zwischen der Schiene und der Bauwerkserde die Stromstärke in der Spule reduziert wird, schließt das Schaltgerät mit Hilfe einer mechanischen Schließeinheit, die z. B. eine mechanische Feder ist. Das unerwünschte gefährlich hohe Schienenpotenzial wird dann abgeleitet.For example, the contactor coil is energized when the connection line is interrupted and it is assigned to the contactor coil a Entrück unit, which is connected via the control line to the control unit. With a contactor coil switched in this way, the particular advantage is achieved that the switching device can be switched quickly and reliably without special additional components. This is due, among other things, to the fact that the switching device is open as long as the contactor coil is traversed by a current. If then in the short term at a high voltage between the rail and the building earth, the current in the coil is reduced, closes the switching device using a mechanical clamping unit, the z. B. is a mechanical spring. The unwanted dangerously high rail potential is then dissipated.
Beispielsweise ist in die Verbindungsleitung ein Stromstärkemesser eingebunden, der über die Steuereinheit mit einem in einer Versorgungsleitung der Schützspule eingebundenen Relais in Verbindung steht. Damit wird der zusätzliche Vorteil erzielt, dass die Schützspule stromlos und damit das Schaltgerät geöffnet bleibt, solange noch ein Strom durch die Verbin- dungsleitung von der Schiene zur Bauwerkserde fließt. DasFor example, in the connecting line, a current meter is integrated, via the control unit with a in a supply line of the contactor coil integrated relay is in communication. This provides the additional advantage that the contactor coil remains de-energized and thus the switching device remains open as long as a current still flows through the connection line from the rail to the building earth. The
Schaltgerät wird also nicht nur durch den Spannungsmesser angesteuert, sondern zusätzlich auch durch den Stromstärkemesser, der sich in der Verbindungsleitung selbst befindet. Dadurch wird mit besonders einfachen Mitteln ein zu hohes und gefährliches Schienenpotenzial vermieden.Switching device is thus controlled not only by the voltmeter, but also by the current meter, which is located in the connecting line itself. This avoids too high and dangerous rail potential with particularly simple means.
Die Aufgabe, ein geeignetes Verfahren zur Begrenzung des Schienenpotenzials bei einer Gleichstrombahn anzugeben, wird mit der genannten Vorrichtung dadurch gelöst, dass, wenn die Spannung zwischen der Schiene und der Bauwerkserde einenThe object of specifying a suitable method for limiting the rail potential in a DC track, is achieved with said device in that when the voltage between the rail and the building earth a
Schwellwert überschreitet, das Schaltgerät schließt und dadurch die Verbindungsleitung leitend schaltet. Das ist vorteilhaft in sehr kurzer Zeit möglich, da die Vorrichtung nach der Erfindung eingesetzt wird.Threshold exceeds the switching device closes, thereby switching the connecting line conductive. This is advantageous in a very short time possible, since the device is used according to the invention.
Beispielsweise bleibt das Schaltgerät mindestens eine vorbestimmte Zeitspanne und darüber hinaus bis die Stromstärke in der Verbindungsleitung einen Schwellwert unterschreitet geschlossen. Damit wird der Vorteil erzielt, dass das Schaltge- rät nicht zu früh wieder geöffnet wird und dass insbesondere ein abwechselndes schnelles Schließen und Öffnen vermieden wird, das zu Beschädigungen führen könnte. Wenn die Spannung zwischen der Schiene und der Bauwerkserde einen Schwellwert überschreitet, wird das Schaltgerät geschlossen und bleibt stets für die vorbestimmte feste Zeitspanne geschlossen. Wenn am Ende dieser Zeitspanne die Stromstärke in der Verbindungsleitung einen Schwellwert noch nicht unterschritten hat, bleibt das Schaltgerät weiterhin geschlossen. Es wird erst dann geöffnet, wenn die Stromstärke ihren Schwellwert unter- schritten hat.For example, the switching device remains closed for at least a predetermined period of time and, moreover, until the current intensity in the connecting line falls below a threshold value. This achieves the advantage that the switching device is not reopened too soon and that, in particular, an alternating rapid closing and opening is avoided, which could lead to damage. When the voltage between the rail and the structure earth exceeds a threshold, the switching device is closed and always remains closed for the predetermined fixed period of time. If, at the end of this period, the current in the connecting line has not fallen below a threshold value, the switching device remains closed. It is only opened when the current has fallen below its threshold value.
Beispielsweise schließt das Schaltgerät dann, wenn die Spannung zwischen der Schiene und der Bauwerkserde für die Dauer von 0,5 ms den Schwellwert überschritten hat, spätestens innerhalb von weiteren 19 ms. Damit wird der Vorteil erzielt, dass ein zu hohes Schienenpotenzial innerhalb von weniger als 20 ms abgeleitet wird. Es kann dann nicht zu einer Gefährdung von Personen kommen. Außerdem sind keine aufwändigen Bauelemente für die Vorrichtung erforderlich.For example, the switching device closes when the voltage between the rail and the building earth for the duration of 0.5 ms has exceeded the threshold, at the latest within a further 19 ms. This provides the advantage that a too high rail potential is dissipated within less than 20 ms. It can then come to a risk to persons. In addition, no complex components for the device are required.
Mit der Vorrichtung und dem Verfahren nach der Erfindung wird insbesondere der Vorteil erzielt, dass mit einfachen Mitteln in sehr kurzer Zeit das Schienenpotenzial verringert werden kann, um eine Gefährdung von Personen auszuschließen.With the device and the method according to the invention, in particular the advantage is achieved that with simple means in a very short time the rail potential can be reduced in order to exclude a risk to persons.
Die Vorrichtung und das Verfahren zur Begrenzung des Schienenpotenzials bei einer Gleichstrombahn werden anhand der Zeichnung näher erläutert.The device and the method for limiting the rail potential in a DC track are explained in more detail with reference to the drawing.
Die Zeichnung zeigt grob schematisch ein Schaltbild für eine solche Vorrichtung.The drawing shows roughly schematically a circuit diagram for such a device.
Zwischen einer Schiene 1 einer Gleichstrombahn und der Bauwerkserde 2 befindet sich ein Spannungsmesser 3, der über eine dynamische Steuereinheit 4 mit einer Entregungseinheit 5 einer Schützspule 6 in Verbindung steht, die, solange sie von einem Strom durchflössen ist, ein Schaltgerät 7 in einer Ver- bindungsleitung 8 zwischen der Schiene 1 und der Bauwerkserde 2 geöffnet hält. Die Schützspule 6 arbeitet dabei ähnlich wie ein Elektromagnet. Sobald der Spannungsmesser 3, in dem ein Vergleich der gemessenen Spannung mit einem Schwellwert möglich ist, eine zu hohe Spannung feststellt, wird über die Steuereinheit 4 und die Entregungseinheit 5 die Schützspule 6 stromlos geschaltet, so dass, z. B. über eine mechanische Feder, das Schaltgerät 7 geschlossen wird. Ein unerwünschtes Schienenpotenzial kann dann von der Schiene 1 über die Verbindungsleitung 8 zur Bauwerkserde 2 abfließen. In der Ver- bindungsleitung 8 befindet sich ein Stromstärkemesser 9, der über die Steuereinheit 4 mit einem Relais 10 in der von einer Energiequelle 11 ausgehenden Energieversorgungsleitung der Schützspule 6 in Verbindung steht. Durch die Steuereinheit 4 und die Entregungseinheit 5 wird, sobald die durch den Spannungsmesser 3 gemessene Spannung einen Schwellwert überschreitet, die Schützspule 6 zunächst für eine vorbestimmte, feste Zeitspanne deaktiviert und dadurch das Schaltgerät 7 geschlossen. Am Ende dieser Zeitspanne wird untersucht, ob die vom Stromstärkemesser 9 gemessene Stromstärke einen Schwellwert unterschritten hat. Wenn das nicht gegeben ist, bleibt die Schützspule 6 weiter deaktiviert und das Schaltgerät 7 bleibt geschlossen. Erst wenn die Stromstärke den Schwellwert unterschreitet, wird das Schaltgerät 7 geöffnet.A voltmeter 3, which is connected via a dynamic control unit 4 to a de-energizing unit 5 of a contactor coil 6, which, as long as it is traversed by a current, is a switching device 7 in a connection between a rail 1 of a direct current track and the building earth 2. connecting line 8 between the rail 1 and the building earth 2 keeps open. The contactor coil 6 works similar to an electromagnet. As soon as the voltmeter 3, in which a comparison of the measured voltage with a threshold value is possible, detects too high a voltage, the contactor coil 6 is de-energized via the control unit 4 and the de-excitation unit 5, so that, e.g. B. via a mechanical spring, the switching device 7 is closed. An undesired rail potential can then flow away from the rail 1 via the connecting line 8 to the building earth 2. In the connection line 8 is a current meter 9, which is connected via the control unit 4 with a relay 10 in the outgoing from an energy source 11 power supply line of the contactor coil 6. By the control unit 4 and the de-excitation unit 5, as soon as the voltage measured by the voltmeter 3 exceeds a threshold value, the contactor coil 6 is first deactivated for a predetermined, fixed period of time and thereby the switching device 7 is closed. At the end of this period, it is examined whether the current intensity measured by the current meter 9 has fallen below a threshold value. If this is not the case, the contactor coil 6 remains deactivated and the switching device 7 remains closed. Only when the current falls below the threshold, the switching device 7 is opened.
Die Steuereinheit 4, die ein dynamisches Ansteuergerät ist, und die Entregungseinheit 5 ermöglichen es, dass dann, wenn die Spannung zwischen der Schiene 1 und der Bauwerkserde 2, die vom Spannungsmesser 3 gemessen wird, für die Dauer vonThe control unit 4, which is a dynamic driving device, and the de-excitation unit 5 allow, when the voltage between the rail 1 and the building earth 2, which is measured by the voltmeter 3, for the duration of
0,5 ms einen Schwellwert überschreitet, spätestens innerhalb von weiteren 19 ms das Schaltgerät 7 schließt und das unerwünschte hohe Schienenpotenzial ableitet. Trotz einfacher Bauelemente ist eine besonders sichere Schaltung gegeben. Darüber hinaus ist die Vorrichtung kleiner als bisher verwendete Vorrichtungen, so dass sie weniger Platz beansprucht und kostengünstiger zu erstellen ist. 0.5 ms exceeds a threshold, at the latest within another 19 ms, the switching device 7 closes and derives the unwanted high rail potential. Despite simple components, a particularly safe circuit is given. In addition, the device is smaller than previously used devices, so that it takes up less space and is cheaper to create.

Claims

Patentansprüche claims
1. Vorrichtung zur Begrenzung des Schienenpotenzials bei einer Gleichstrombahn, wobei eine niederohmige Verbindungslei- tung (8) zwischen der Schiene (1) und der Bauwerkserde (2) angeordnet ist und wobei in die Verbindungsleitung (8) ein Schaltgerät (7) eingebunden ist, das über eine Steuerleitung mit einer Steuereinheit (4) verbunden ist, die mit einem zwischen der Schiene (1) und der Bauwerkserde (2) angeordneten Spannungsmesser (3) in Verbindung steht, dadurch gekennzeichnet, dass das Schaltgerät (7) eine Schützspule (6) aufweist, die mit einer dynamischen Steuereinheit (4) verbunden ist.1. Device for limiting the rail potential in a direct current path, wherein a low-resistance connection line (8) between the rail (1) and the building earth (2) is arranged and wherein in the connecting line (8) is integrated a switching device (7), which is connected via a control line to a control unit (4) which is connected to a tension meter (3) arranged between the rail (1) and the building earth (2), characterized in that the switching device (7) has a contactor coil (6 ) connected to a dynamic control unit (4).
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Schützspule (6) bei unterbrochener Verbindungsleitung (8) erregt ist und dass der Schützspule (6) eine Entregungsein- heit (5) zugeordnet ist, die über die Steuerleitung mit der Steuereinheit (4) verbunden ist.2. Device according to claim 1, characterized in that the contactor coil (6) is energized when the connecting line (8) is interrupted and that the contactor coil (6) is associated with a de-excitation unit (5) which is connected to the control unit (4) via the control line ) connected is.
3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass in die Verbindungsleitung (8) ein Stromstärkemesser (9) eingebunden ist, der über die Steuereinheit (4) mit einem in einer Versorgungsleitung der Schützspule (6) eingebundenen Relais (10) in Verbindung steht.3. Device according to one of claims 1 or 2, characterized in that in the connecting line (8) a current meter (9) is integrated, via the control unit (4) with a in a supply line of the contactor coil (6) integrated relay (10 ).
4. Verfahren zur Begrenzung des Schienenpotenzials bei einer Gleichstrombahn mit einer Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass, wenn die Spannung zwischen der Schiene (1) und der Bauwerkserde (2) einen Schwellwert überschreitet, das Schaltgerät (7) schließt und dadurch die Verbindungsleitung (8) leitend schaltet.4. A method for limiting the rail potential in a DC track with a device according to one of claims 1 to 3, characterized in that when the voltage between the rail (1) and the building earth (2) exceeds a threshold, the switching device (7) closes and thereby the connecting line (8) turns on.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das Schaltgerät (7) mindestens eine vorbestimmte Zeitspanne und darüber hinaus bis die Stromstärke in der Verbindungsleitung (8) einen Schwellwert unterschreitet geschlossen bleibt. 5. The method according to claim 4, characterized in that the switching device (7) remains closed for at least a predetermined period of time and beyond until the current in the connecting line (8) falls below a threshold value.
6. Verfahren nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass dann, wenn die Spannung zwischen der Schiene (1) und der Bauwerkserde (2) für die Dauer von 0,5 ms den Schwellwert überschritten hat, das Schaltgerät (7) spä- testens innerhalb von weiteren 19 ms schließt. 6. The method according to any one of claims 4 or 5, characterized in that when the voltage between the rail (1) and the building earth (2) for the duration of 0.5 ms has exceeded the threshold, the switching device (7) closes within another 19 ms at the latest.
PCT/EP2009/059566 2008-09-30 2009-07-24 Device and method for limiting the rail potential in a dc railway WO2010037578A1 (en)

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EP09781040A EP2328776A1 (en) 2008-09-30 2009-07-24 Device and method for limiting the rail potential in a dc railway
CN200980144224.7A CN102209648B (en) 2008-09-30 2009-07-24 Device and method for limiting the rail potential in a DC railway

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DE102008049706A DE102008049706A1 (en) 2008-09-30 2008-09-30 Device and method for limiting the rail potential in a DC track

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JP6502763B2 (en) * 2015-06-29 2019-04-17 東日本旅客鉄道株式会社 Ground fault protection device and ground fault protection system
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CN108819801B (en) * 2018-07-05 2021-06-01 苏州大学 Steel rail potential suppression system and method
JP7198627B2 (en) * 2018-10-12 2023-01-04 株式会社日立製作所 Rail vehicle and power control method for rail vehicle
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CN102209648A (en) 2011-10-05
EP2328776A1 (en) 2011-06-08
DE102008049706A1 (en) 2010-04-01
CN102209648B (en) 2014-07-23

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