CA2300063A1 - Residual current device - Google Patents
Residual current device Download PDFInfo
- Publication number
- CA2300063A1 CA2300063A1 CA002300063A CA2300063A CA2300063A1 CA 2300063 A1 CA2300063 A1 CA 2300063A1 CA 002300063 A CA002300063 A CA 002300063A CA 2300063 A CA2300063 A CA 2300063A CA 2300063 A1 CA2300063 A1 CA 2300063A1
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- CA
- Canada
- Prior art keywords
- current
- fault
- circuit
- tripping
- diode
- 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.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/332—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means responsive to dc component in the fault current
Abstract
A fault-current protective switchgear has a first fault-current circuit-breaker (2) with a delayed circuit-breaking reaction for alternating and pulsed fault-current and a second fault-current circuit breaker (10) for direct fault-current, both circuit-breakers being connected in parallel to a control line (18) of a circuit-breaker (8) for a switch. First means (26) are provided for electronically disconnecting the first fault-current circuit-breaker (2) from the control line (18).
Description
Description Residual current device The invention relates to a residual current device.
A residual current device is used to ensure protection against any dangerous fault current in a electrical system. Such a fault current occurs when a live conductor part makes electrical contact with ground. This occurs, for example, when someone touches a live part of an electrical system or an insulation fault occurs in the system. The fault current then flows via the person, as a body current, and in the system as a fault current, td earth. The residual current device which is used for protection against dangerous body currents must then reliably and quickly isolate the electrical system from the mains power supply in the event of a fault current which is greater than the rated fault current, for example 30 mA for personnel protection and 200 mA for system protection.
The design of a residual current device is known, for example, from "etz" Volume 107 (1986), Issue 20, pages 938 to 945. There, Figures 1 to 3, in particular, show outline circuit diagrams and functional principles of a residual current device. A
distinction is in this case drawn between two different fundamental types . A FI circuit breaker, which is also referred to as a fault-current circuit breaker, is a fault-current protective device in which the electrical power required for the switching process is obtained from the fault current itself, irrespective of the mains voltage. A so-called differential-current DI
protective circuit breaker is, in contrast, a fault-current protective device in which the ", , auxiliary electrical energy required for the switching process is taken from the mains power supply. Such a DI
circuit breaker thus requires a mains connection and a power supply unit to operate it, with the power supply unit converting the mains voltage into the supply voltage required to operate its components.
While, by virtue of the principle of their design, FI circuit breakers can trip the circuit breaker only in the event of an alternating or pulsed fault current, it is in principle possible, by using the DI circuit breaker, to detect a direct fault current and to use this to trip a circuit breaker. By using a combination of an FI circuit breaker and a DI
circuit breaker, it is thus in principle possible to monitor an electrical system both for a direct fault current and for an alternating or pulsed fault current.
The basic circuit diagram of such a so-called all-current-sensitive residual current device is described, for example, in "etz", Volume 115, 1994, Issue 16, pages 896-901. Figure 2 in that document shows a release for the mechanism of a circuit breaker being connected both to a fault-current tripping circuit for alternating and pulsed fault current, and to a fault-current tripping circuit for direct fault current.
European Patent Specification 0 440 835 also discloses a combination of a DI circuit breaker and an FI circuit breaker. The DI circuit breaker which is intended there to be combined with the FI circuit breaker comprises a secondary winding (which is premagnetized with a frequency generator) of a core-balance current transformer, in which case a device for balancing the signal curves emitted from the frequency generator is connected between the frequency generator and the secondary winding.
However, such a combination is not without its problems when so-called delayed-tripping FI circuit breakers are intended to be combined with a DI circuit breaker for direct fault current. A delayed-tripping FI circuit breaker is used in order to reduce spurious tripping due to switching spikes or lightning, or in order to allow selective disconnection of parts of the system.
Such a delayed-tripping FI circuit breaker, which is resistant to surge currents, is explained in more detail, for example, in the "Siemens Journal", Year 42, Issue 6, 1968, pages 492 to 494. This known FI circuit breaker is provided, in the secondary circuit, with a rectifier and a capacitor which is connected in parallel with the release and produces the tripping delay. This capacitor connected in parallel with the release would be charged when a fault-current tripping circuit (connected in parallel with it) of a DI circuit breaker responded and applied current to the release, so that the tripping time would be extended in the event of a smooth direct fault current. In consequence, it is not possible to comply overall and in accordance with the regulations (VDE, OVE, EN, IEC) with the required tripping delays for alternating, pulsed and smooth-direct fault currents.
On the other hand, a device for protection against fault currents is known, which operates with a first subdevice which is independent of the mains voltage, and with a second subdevice which is dependent on the mains voltage (DE-C2-38 23 099). In this case, a capacitor is arranged in series with a tripping relay in the first subdevice in order to tune to resonance for the fault-current evaluation. The second subdevice is arranged in parallel with the first subdevice as well as the capacitor, for resonance tuning.
AMENDED SHEET
The invention is now based on the object 'of specifying a residual current device in which, in particular, a delayed-tripping fault-current tripping circuit for pulsed or alternating current can be combined with a fault-current tripping circuit for direct fault current, without the tripping times and currents influencing one another.
The said object is achieved according to the invention by the features of patent claim 1. The residual current device according to the invention contains a delayed-tripping first fault-current tripping circuit for alternating and pulsed fault current, and a second fault-current tripping circuit for direct fault current, which are connected in parallel with one another to the control line of a release for a circuit breaker, with a first means being provided for electronic decoupling of the first fault-current tripping circuit from the control line. As a result of this electronic decoupling, tripping times and tripping currents cannot influence one another, so that, when the two fault-current tripping circuits are combined, the characteristic data for the individual fault-current tripping circuits, that is to say the rated fault current and the tripping delay for the types of fault current respectively associated with them, remain unchanged even in the combination.
The principle of decoupling for two parallel measurement channels is known per se (DE-A1-37 18 183).
In a further advantageous refinement of the invention, the first decoupling circuit comprises a diode by means of which the first fault-current tripping circuit is connected to the release. In consequence, when any current flows in the release circuit, this prevents charging of the capacitor which is provided in the first fault-current tripping circuit in order to delay tripping. In consequence, there is no AMENDED SHEET
' GR 97 P 3581 P - 4a -undesirable tripping delay for the second fault-current tripping circuit.
In particular, the first decoupling circuit comprises a discharge resistor which is connected in parallel with the capacitor, upstream of the diode.
This ensures that the capacitor is discharged completely.
AMENDED SHEET
A Schottky diode, which has a particularly low threshold voltage, is preferably provided as the diode.
In a further preferred embodiment, a threshold value switch is provided in the first decoupling circuit, which likewise prevents the capacitor in the first fault-current tripping circuit from being charged when the second fault-current tripping circuit responds.
In one particularly advantageous refinement of the invention, a second fault-current tripping circuit is provided, whose tripping is likewise delayed, with second means being provided for electronic decoupling of the second fault-current tripping circuit from the control line. This additional electronic decoupling ensures that tripping times and tripping currents cannot influence one another even when the tripping of both fault-current tripping circuits is delayed.
In order to explain the invention in more detail, reference is made to the drawing, in which:
Figure 1 shows an outline sketch of the circuit of a residual current device according to the invention, Figures 2 and 3 show advantageous refinements of a first decoupling circuit provided in the residual current device according to the invention.
According to Figure 1, an all-current-sensitive residual current device comprises a first fault-current tripping circuit 2, which is connected to the secondary winding 4 of a first core-balance current transformer 6. The first core-balance current transformer 6 is used to monitor a polyphase network L1, L2, L3, N for alternating and pulsed fault current.
The first fault-current tripping circuit 2 contains a capacitor C which is connected to earth and is used to delay the tripping of a release 8 (which is actuated by the first fault-current tripping circuit 2), for example a coil winding of a tripping relay.
A second fault-current tripping circuit 10 which is known, for example, from European Patent Specification 0 440 835 B1 is connected to the secondary winding 12 of a second core-balance current transformer 14 and is used for tripping when a direct fault current is present. The secondary winding 12 of the second core-balance current transformer 14 has a pulse generator 16 connected to it, in order to premagnetize the core-balance current transformer 14, and which is provided with a device for balancing the signal emitted from it to the secondary winding 12.
The second fault-current tripping circuit 10 operates the release 8 via a control line 18, by producing the tripping current I required to trip it.
The release 8 is operatively connected to a switching mechanism 20, by means of which a circuit breaker 22 can be tripped.
A power supply unit 24 is used to supply voltage to the second fault-current tripping circuit 10.
A first decoupling circuit 26 is connected between the first fault-current tripping circuit 2 and the control line 18 which leads to the release 8, and this first decoupling circuit 26 prevents the first fault-current tripping circuit 2 from producing any reaction on the tripping response of the second fault-current tripping circuit 10.
According to Figure 2, the first decoupling circuit 26 for this purpose contains a diode D, which is connected in series with the output of the first fault-current tripping circuit 2, which is used to prevent the tripping current I (which flows on the control line 18 when the second fault-current tripping circuit trips) leading to charging of the capacitor C1 which is connected to earth in the first fault-current tripping circuit 2. Such charging would result in the tripping of the release 8 being delayed when the second fault-current tripping circuit 10 responds, when said second fault-current tripping circuit 10 is operated in conjunction with the first fault-current tripping circuit 2, but without the interposition of a first decoupling circuit 26.
A high-value discharge resistor RE is connected to earth upstream of the diode D, thus ensuring that the capacitor C1 is discharged below the threshold voltage of the diode D, and that the initial conditions are reproduced. A Schottky diode having a low threshold voltage, and thus a low power loss, is provided, in particular, as the diode D.
Diodes having a low threshold voltage, likewise in particular, Schottky diodes, are preferably also provided in a rectifier 28 in the first fault-current tripping circuit 2, in order to reduce the loss that occurs through the diode D and, despite the connection of the diode D, to allow the tripping current I (which is required to trip the release 8) to flow through the release 8.
In the refinement shown in Figure 3, the first decoupling circuit 26 contains a threshold-value switch S1 instead of the diode D (Figure 2), and this threshold-value switch S1 opens if the first fault current tripping circuit 2 fails to respond. This prevents the tripping response of the second fault current tripping circuit 10 from being influenced by the connection of the first fault-current tripping circuit 2.
The tripping of the second fault-current tripping circuit 10 is preferably likewise delayed and, to produce this tripping delay, this circuit contains a capacitor C2 connected to earth and, in this case in particular, is connected to the control line 18 via a second decoupling circuit 30, a threshold-value switch S2 in the exemplary embodiment. This also prevents the tripping response of the first fault-current tripping circuit 2 from being influenced by the presence of the second fault-current tripping circuit 2.
A residual current device is used to ensure protection against any dangerous fault current in a electrical system. Such a fault current occurs when a live conductor part makes electrical contact with ground. This occurs, for example, when someone touches a live part of an electrical system or an insulation fault occurs in the system. The fault current then flows via the person, as a body current, and in the system as a fault current, td earth. The residual current device which is used for protection against dangerous body currents must then reliably and quickly isolate the electrical system from the mains power supply in the event of a fault current which is greater than the rated fault current, for example 30 mA for personnel protection and 200 mA for system protection.
The design of a residual current device is known, for example, from "etz" Volume 107 (1986), Issue 20, pages 938 to 945. There, Figures 1 to 3, in particular, show outline circuit diagrams and functional principles of a residual current device. A
distinction is in this case drawn between two different fundamental types . A FI circuit breaker, which is also referred to as a fault-current circuit breaker, is a fault-current protective device in which the electrical power required for the switching process is obtained from the fault current itself, irrespective of the mains voltage. A so-called differential-current DI
protective circuit breaker is, in contrast, a fault-current protective device in which the ", , auxiliary electrical energy required for the switching process is taken from the mains power supply. Such a DI
circuit breaker thus requires a mains connection and a power supply unit to operate it, with the power supply unit converting the mains voltage into the supply voltage required to operate its components.
While, by virtue of the principle of their design, FI circuit breakers can trip the circuit breaker only in the event of an alternating or pulsed fault current, it is in principle possible, by using the DI circuit breaker, to detect a direct fault current and to use this to trip a circuit breaker. By using a combination of an FI circuit breaker and a DI
circuit breaker, it is thus in principle possible to monitor an electrical system both for a direct fault current and for an alternating or pulsed fault current.
The basic circuit diagram of such a so-called all-current-sensitive residual current device is described, for example, in "etz", Volume 115, 1994, Issue 16, pages 896-901. Figure 2 in that document shows a release for the mechanism of a circuit breaker being connected both to a fault-current tripping circuit for alternating and pulsed fault current, and to a fault-current tripping circuit for direct fault current.
European Patent Specification 0 440 835 also discloses a combination of a DI circuit breaker and an FI circuit breaker. The DI circuit breaker which is intended there to be combined with the FI circuit breaker comprises a secondary winding (which is premagnetized with a frequency generator) of a core-balance current transformer, in which case a device for balancing the signal curves emitted from the frequency generator is connected between the frequency generator and the secondary winding.
However, such a combination is not without its problems when so-called delayed-tripping FI circuit breakers are intended to be combined with a DI circuit breaker for direct fault current. A delayed-tripping FI circuit breaker is used in order to reduce spurious tripping due to switching spikes or lightning, or in order to allow selective disconnection of parts of the system.
Such a delayed-tripping FI circuit breaker, which is resistant to surge currents, is explained in more detail, for example, in the "Siemens Journal", Year 42, Issue 6, 1968, pages 492 to 494. This known FI circuit breaker is provided, in the secondary circuit, with a rectifier and a capacitor which is connected in parallel with the release and produces the tripping delay. This capacitor connected in parallel with the release would be charged when a fault-current tripping circuit (connected in parallel with it) of a DI circuit breaker responded and applied current to the release, so that the tripping time would be extended in the event of a smooth direct fault current. In consequence, it is not possible to comply overall and in accordance with the regulations (VDE, OVE, EN, IEC) with the required tripping delays for alternating, pulsed and smooth-direct fault currents.
On the other hand, a device for protection against fault currents is known, which operates with a first subdevice which is independent of the mains voltage, and with a second subdevice which is dependent on the mains voltage (DE-C2-38 23 099). In this case, a capacitor is arranged in series with a tripping relay in the first subdevice in order to tune to resonance for the fault-current evaluation. The second subdevice is arranged in parallel with the first subdevice as well as the capacitor, for resonance tuning.
AMENDED SHEET
The invention is now based on the object 'of specifying a residual current device in which, in particular, a delayed-tripping fault-current tripping circuit for pulsed or alternating current can be combined with a fault-current tripping circuit for direct fault current, without the tripping times and currents influencing one another.
The said object is achieved according to the invention by the features of patent claim 1. The residual current device according to the invention contains a delayed-tripping first fault-current tripping circuit for alternating and pulsed fault current, and a second fault-current tripping circuit for direct fault current, which are connected in parallel with one another to the control line of a release for a circuit breaker, with a first means being provided for electronic decoupling of the first fault-current tripping circuit from the control line. As a result of this electronic decoupling, tripping times and tripping currents cannot influence one another, so that, when the two fault-current tripping circuits are combined, the characteristic data for the individual fault-current tripping circuits, that is to say the rated fault current and the tripping delay for the types of fault current respectively associated with them, remain unchanged even in the combination.
The principle of decoupling for two parallel measurement channels is known per se (DE-A1-37 18 183).
In a further advantageous refinement of the invention, the first decoupling circuit comprises a diode by means of which the first fault-current tripping circuit is connected to the release. In consequence, when any current flows in the release circuit, this prevents charging of the capacitor which is provided in the first fault-current tripping circuit in order to delay tripping. In consequence, there is no AMENDED SHEET
' GR 97 P 3581 P - 4a -undesirable tripping delay for the second fault-current tripping circuit.
In particular, the first decoupling circuit comprises a discharge resistor which is connected in parallel with the capacitor, upstream of the diode.
This ensures that the capacitor is discharged completely.
AMENDED SHEET
A Schottky diode, which has a particularly low threshold voltage, is preferably provided as the diode.
In a further preferred embodiment, a threshold value switch is provided in the first decoupling circuit, which likewise prevents the capacitor in the first fault-current tripping circuit from being charged when the second fault-current tripping circuit responds.
In one particularly advantageous refinement of the invention, a second fault-current tripping circuit is provided, whose tripping is likewise delayed, with second means being provided for electronic decoupling of the second fault-current tripping circuit from the control line. This additional electronic decoupling ensures that tripping times and tripping currents cannot influence one another even when the tripping of both fault-current tripping circuits is delayed.
In order to explain the invention in more detail, reference is made to the drawing, in which:
Figure 1 shows an outline sketch of the circuit of a residual current device according to the invention, Figures 2 and 3 show advantageous refinements of a first decoupling circuit provided in the residual current device according to the invention.
According to Figure 1, an all-current-sensitive residual current device comprises a first fault-current tripping circuit 2, which is connected to the secondary winding 4 of a first core-balance current transformer 6. The first core-balance current transformer 6 is used to monitor a polyphase network L1, L2, L3, N for alternating and pulsed fault current.
The first fault-current tripping circuit 2 contains a capacitor C which is connected to earth and is used to delay the tripping of a release 8 (which is actuated by the first fault-current tripping circuit 2), for example a coil winding of a tripping relay.
A second fault-current tripping circuit 10 which is known, for example, from European Patent Specification 0 440 835 B1 is connected to the secondary winding 12 of a second core-balance current transformer 14 and is used for tripping when a direct fault current is present. The secondary winding 12 of the second core-balance current transformer 14 has a pulse generator 16 connected to it, in order to premagnetize the core-balance current transformer 14, and which is provided with a device for balancing the signal emitted from it to the secondary winding 12.
The second fault-current tripping circuit 10 operates the release 8 via a control line 18, by producing the tripping current I required to trip it.
The release 8 is operatively connected to a switching mechanism 20, by means of which a circuit breaker 22 can be tripped.
A power supply unit 24 is used to supply voltage to the second fault-current tripping circuit 10.
A first decoupling circuit 26 is connected between the first fault-current tripping circuit 2 and the control line 18 which leads to the release 8, and this first decoupling circuit 26 prevents the first fault-current tripping circuit 2 from producing any reaction on the tripping response of the second fault-current tripping circuit 10.
According to Figure 2, the first decoupling circuit 26 for this purpose contains a diode D, which is connected in series with the output of the first fault-current tripping circuit 2, which is used to prevent the tripping current I (which flows on the control line 18 when the second fault-current tripping circuit trips) leading to charging of the capacitor C1 which is connected to earth in the first fault-current tripping circuit 2. Such charging would result in the tripping of the release 8 being delayed when the second fault-current tripping circuit 10 responds, when said second fault-current tripping circuit 10 is operated in conjunction with the first fault-current tripping circuit 2, but without the interposition of a first decoupling circuit 26.
A high-value discharge resistor RE is connected to earth upstream of the diode D, thus ensuring that the capacitor C1 is discharged below the threshold voltage of the diode D, and that the initial conditions are reproduced. A Schottky diode having a low threshold voltage, and thus a low power loss, is provided, in particular, as the diode D.
Diodes having a low threshold voltage, likewise in particular, Schottky diodes, are preferably also provided in a rectifier 28 in the first fault-current tripping circuit 2, in order to reduce the loss that occurs through the diode D and, despite the connection of the diode D, to allow the tripping current I (which is required to trip the release 8) to flow through the release 8.
In the refinement shown in Figure 3, the first decoupling circuit 26 contains a threshold-value switch S1 instead of the diode D (Figure 2), and this threshold-value switch S1 opens if the first fault current tripping circuit 2 fails to respond. This prevents the tripping response of the second fault current tripping circuit 10 from being influenced by the connection of the first fault-current tripping circuit 2.
The tripping of the second fault-current tripping circuit 10 is preferably likewise delayed and, to produce this tripping delay, this circuit contains a capacitor C2 connected to earth and, in this case in particular, is connected to the control line 18 via a second decoupling circuit 30, a threshold-value switch S2 in the exemplary embodiment. This also prevents the tripping response of the first fault-current tripping circuit 2 from being influenced by the presence of the second fault-current tripping circuit 2.
Claims (6)
1. A residual current device having a first fault-current tripping circuit (2), whose tripping is delayed by means of a capacitor arranged on the output side, for alternating and pulsed fault current, and having a second fault-current tripping circuit (10) for direct fault current, which are connected in parallel with one another to a control line (18) of a release (8) for a circuit breaker (22), with first means (26) being provided for electronic decoupling of the first fault-current tripping circuit (2) from the control line (18) in such a manner that tripping times and tripping currents of the first and second fault-current tripping circuits do not influence one another.
2. The residual current device as claimed in claim 1, in which the first decoupling circuit (26) comprises a diode (D) by means of which the first fault-current tripping circuit (2) is connected to the release (8).
3. The residual current device as claimed in claim 2, in which the first decoupling circuit (26) comprises a discharge resistor (R E) which is connected in parallel with the capacitor (C1) and upstream of the diode (D).
4. The residual current device as claimed in claim 2 or 3, in which a Schottky diode is provided as the diode (D).
5. The residual current device as claimed in claim 1, in which the first decoupling circuit (26) comprises a threshold-value switch (S1).
6. The residual current device as claimed in one of claims 1 to 5, in which the second fault-current tripping circuit (10) has a time delay, with second means (30) being provided to decouple it electronically from the control line (18).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19735412A DE19735412A1 (en) | 1997-08-14 | 1997-08-14 | Fault-current protection device e.g. for protecting personnel against dangerous fault currents in electrical equipment |
| DE19735412.2 | 1997-08-14 | ||
| PCT/DE1998/002215 WO1999009629A1 (en) | 1997-08-14 | 1998-08-03 | Fault-current protective switchgear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2300063A1 true CA2300063A1 (en) | 1999-02-25 |
Family
ID=7839073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002300063A Abandoned CA2300063A1 (en) | 1997-08-14 | 1998-08-03 | Residual current device |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6437954B1 (en) |
| EP (1) | EP1004161B1 (en) |
| AT (1) | ATE215754T1 (en) |
| CA (1) | CA2300063A1 (en) |
| DE (2) | DE19735412A1 (en) |
| ES (1) | ES2175783T3 (en) |
| WO (1) | WO1999009629A1 (en) |
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| DE19857739A1 (en) * | 1998-12-15 | 2000-06-21 | Abb Patent Gmbh | Residual current protection circuit arrangement |
| DE19940343A1 (en) * | 1999-08-25 | 2001-03-01 | Siemens Ag | Residual current device |
| US6625551B1 (en) * | 2000-06-09 | 2003-09-23 | Siemens Aktiengesellschaft | Fault current and differential current detection system capable of preventing spurious triggering of a protection system due to transient interference pulses |
| DE10125051A1 (en) * | 2001-05-14 | 2002-11-21 | Siemens Ag | By-pass circuit for electronic excess current trigger for low voltage switch has current converters with sufficient output power to actuate trigger magnet when short circuit current flowing |
| DE50312885D1 (en) | 2003-05-15 | 2010-08-26 | Siemens Ag | All-current sensitive residual current device |
| DE50312842D1 (en) * | 2003-05-15 | 2010-08-12 | Siemens Ag | All-current sensitive residual current device |
| EP1478068B1 (en) | 2003-05-15 | 2010-06-30 | Siemens Aktiengesellschaft | All fault-current sensitive protection device |
| US7688562B2 (en) * | 2004-07-15 | 2010-03-30 | Veris Industries, Llc | Status relay including a current switch |
| DE102005041823B3 (en) | 2005-09-02 | 2007-02-01 | Siemens Ag | Controller for internal combustion engine, has circuit sections running proximate to magnetic flux part so that magnetic flux portions are compensated, and coil assembly detecting failures based on evaluation of voltage induced at assembly |
| CA2609625A1 (en) * | 2007-09-10 | 2009-03-10 | Veris Industries, Llc | Multi-voltage housing |
| AT507224B1 (en) * | 2008-06-18 | 2010-03-15 | Moeller Gebaeudeautomation Gmb | FAULT CIRCUIT BREAKER |
| DE102010028626B4 (en) * | 2010-05-05 | 2021-09-16 | Bender Gmbh & Co. Kg | Electric vehicle charging device |
| DE102011007042A1 (en) * | 2011-03-18 | 2012-09-20 | Elektro-Bauelemente Gmbh | Protective circuit for switching off charging current in electric vehicle charging station, disconnects charging current load signal line in response to signal generated by program executed in control unit, and switching unit status signal |
| PL2500208T5 (en) | 2011-03-18 | 2021-07-19 | Compleo Charging Solutions Gmbh | Protective circuit assembly |
| DE102011082941A1 (en) | 2011-09-19 | 2013-03-21 | Bender Gmbh & Co. Kg | Electrical monitoring device and method for ensuring the protective function of a residual current device (RCD) type A |
| DE102011089631B4 (en) * | 2011-12-22 | 2022-05-12 | Siemens Aktiengesellschaft | circuit breaker |
| DE102012208120A1 (en) * | 2012-05-15 | 2013-11-21 | Siemens Aktiengesellschaft | Charging device for charging energy store of electric car, has measurement unit that detects output energy and overcurrent produced by charging device, and control unit processes measurement values acquired from measurement unit |
| DE102013105310A1 (en) * | 2013-05-23 | 2014-11-27 | Eaton Industries (Austria) Gmbh | Residual Current Device |
| DE102013105312A1 (en) * | 2013-05-23 | 2014-11-27 | Eaton Industries (Austria) Gmbh | Residual Current Device |
| CN104659742B (en) * | 2013-11-15 | 2018-04-17 | 西门子公司 | A kind of residual current device |
| CN104934931B (en) * | 2014-03-21 | 2019-01-04 | 上海电科电器科技有限公司 | Aftercurrent protecting equipment |
| FR3044836B1 (en) * | 2015-12-03 | 2019-10-18 | Hager-Electro Sas | DIFFERENTIAL PROTECTION DEVICE OF TYPE B OR B + HAVING TWO MODULES IN PARALLEL AND IN COMPETITION |
| CN109038516B (en) * | 2018-07-24 | 2020-01-14 | 西安理工大学 | Accelerated protection method for direct-current power distribution network line |
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| FR2553943B1 (en) * | 1983-10-24 | 1986-04-11 | Merlin Gerin | RESIDUAL DIFFERENTIAL DEVICE PROVIDED WITH A DEVICE FOR MONITORING THE ELECTRONIC POWER SOURCE |
| DE3718183C2 (en) | 1987-05-29 | 1994-06-01 | Siemens Ag | Residual current circuit breaker |
| DE3823099C2 (en) * | 1988-07-07 | 1996-09-26 | Siemens Ag | Device for protection against residual currents |
| EP0349880A1 (en) * | 1988-07-07 | 1990-01-10 | Siemens Aktiengesellschaft | Fault current protection device |
| DE58907960D1 (en) * | 1989-04-24 | 1994-07-28 | Siemens Ag | Residual current circuit breaker and method for setting the tripping ranges. |
| DK0440835T3 (en) | 1990-02-05 | 1996-02-12 | Siemens Ag | Device for balancing signal curves and differential circuit breaker with transducer circuitry for balanced pre-magnetization |
| DE4112169C2 (en) * | 1991-04-13 | 1994-03-10 | Doepke & Co Schaltgeraetefabri | Residual current monitoring device |
| US5596472A (en) * | 1991-08-30 | 1997-01-21 | Siemens Aktiengesellschaft | Process for controlling an overcurrent tripping device of a high-speed d.c. circuit-breaker |
| US5668692A (en) * | 1993-10-27 | 1997-09-16 | Square D Company | Self-powered circuit interruption arrangement |
| PL176938B1 (en) * | 1994-01-24 | 1999-08-31 | Schrack Eh Energietechnik Gmbh | Residual current protective switch |
| JP3250648B2 (en) * | 1996-03-26 | 2002-01-28 | 富士電機株式会社 | Overcurrent trip device |
| DE19618279A1 (en) * | 1996-05-07 | 1997-11-13 | Kopp Heinrich Ag | DI protection switch |
| US5835321A (en) * | 1996-08-02 | 1998-11-10 | Eaton Corporation | Arc fault detection apparatus and circuit breaker incorporating same |
| US5847913A (en) * | 1997-02-21 | 1998-12-08 | Square D Company | Trip indicators for circuit protection devices |
-
1997
- 1997-08-14 DE DE19735412A patent/DE19735412A1/en not_active Withdrawn
-
1998
- 1998-08-03 CA CA002300063A patent/CA2300063A1/en not_active Abandoned
- 1998-08-03 EP EP98947376A patent/EP1004161B1/en not_active Expired - Lifetime
- 1998-08-03 ES ES98947376T patent/ES2175783T3/en not_active Expired - Lifetime
- 1998-08-03 DE DE59803643T patent/DE59803643D1/en not_active Expired - Lifetime
- 1998-08-03 WO PCT/DE1998/002215 patent/WO1999009629A1/en active IP Right Grant
- 1998-08-03 AT AT98947376T patent/ATE215754T1/en not_active IP Right Cessation
- 1998-08-03 US US09/485,740 patent/US6437954B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2175783T3 (en) | 2002-11-16 |
| EP1004161A1 (en) | 2000-05-31 |
| DE19735412A1 (en) | 1999-02-18 |
| EP1004161B1 (en) | 2002-04-03 |
| ATE215754T1 (en) | 2002-04-15 |
| WO1999009629A1 (en) | 1999-02-25 |
| DE59803643D1 (en) | 2002-05-08 |
| US6437954B1 (en) | 2002-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |