EP1212768B1 - Vorrichtung zur innendruckmessung, spannungskonditionierung und stromkonditionierung von vakuumschaltröhren und verfahren hierfür - Google Patents
Vorrichtung zur innendruckmessung, spannungskonditionierung und stromkonditionierung von vakuumschaltröhren und verfahren hierfür Download PDFInfo
- Publication number
- EP1212768B1 EP1212768B1 EP00964008A EP00964008A EP1212768B1 EP 1212768 B1 EP1212768 B1 EP 1212768B1 EP 00964008 A EP00964008 A EP 00964008A EP 00964008 A EP00964008 A EP 00964008A EP 1212768 B1 EP1212768 B1 EP 1212768B1
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- EP
- European Patent Office
- Prior art keywords
- current
- internal pressure
- vacuum interrupter
- conditioning
- voltage
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- 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.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/668—Means for obtaining or monitoring the vacuum
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
- H01H2001/0205—Conditioning of the contact material through arcing during manufacturing, e.g. vacuum-depositing of layer on contact surface
Definitions
- the invention relates to a device for internal pressure measurement, voltage conditioning and current conditioning of vacuum interrupters and processes for this using the device.
- the basic condition for the safe functioning of vacuum interrupters that is, interruption of the vacuum arc when switching off and sufficient internal dielectric strength of the switching path, is an internal pressure of approximately 10 -7 bar or less. This pressure must not be exceeded during the entire service life of the vacuum interrupter. For the quality assurance of vacuum interrupters, it is therefore necessary to measure the internal pressure of vacuum interrupters in order to ensure a long service life and high quality of the vacuum interrupters.
- the measurement of the internal pressure of vacuum interrupters is usually carried out according to the magnetron principle, as described, for example, in CALOREMAG notices I / 1983, pages 19 to 21 in the essay "Measurement of the internal pressure of vacuum interrupters” by Siegbert Berger or in Siemens-Zeitschrift 51 (1977) No. 5, page 427 to page 430 "Measuring device for determining the internal pressure of vacuum interrupters" by Wilfried Kuhl and Klemens Wiehl.
- the magnetron process is based on the ionization of residual gas molecules according to the cold cathode measuring principle (also known as Penning principle): when a DC high voltage of a few kV is applied, the electrons that are always present in the vacuum container are accelerated towards the anode, primarily due to field emissions and cosmic radiation, where they are accelerated by collision processes ionize other residual gas molecules. Since the mean free path of an electron in a high vacuum is a few meters, the probability of collision is increased accordingly by connecting a DC magnetic field that forces the electrodes on spiral tracks. At the pressures typical for vacuum interrupters (10 -7 - 10 -4 mbar), the ion flow generated in this way is approximately proportional to the residual gas pressure.
- the cold cathode measuring principle also known as Penning principle
- the current conditioning is targeted Property of vacuum arcs of type A used that the cathode base stochastically at high speed on the entire contact surface hike; due to the high current density with a very small footprint area microscopic on the surface of the cathode small melting and evaporation.
- One leaves in the vacuum interrupter Burning a DC arc over a defined time is achieved in this way, a more even distribution of the contact structure, continues a cleaning of the immediate contact surface and the near surface Range of possible impurities, on the other hand are processing-related Inhomogeneities such as Rotation grooves smoothed.
- Voltage conditioning takes advantage of the fact that there are high-voltage discharges preferably form at selective surface inhomogeneities, where there are increases in the electric field strength. In the These micro inhomogeneities are suitable for voltage conditioning selected discharge current efficiently removed, so that the insulation resistance the vacuum path compared to the unconditioned case has increased significantly. In order to smooth both contact surfaces as evenly as possible To achieve in the shortest possible time, it is advisable to condition with AC breakdowns, the high voltage depending on on the progress of conditioning (number of rollovers per time interval, related to the respective high voltage (peak) value) increased becomes.
- the object of the invention is to carry out the measurement method and conditioning procedures for quality assurance of vacuum interrupters and vacuum interrupters more economical and less expensive to design.
- the invention is characterized by a device for measuring internal pressure, Voltage conditioning and current conditioning of vacuum interrupters comprising a coil for generating magnetic fields for internal pressure measurement, a high current transformer that builds the coil current the magnetic field as well as the DC current for the current conditioning, a high-voltage generator that is used on the one hand for internal pressure measurement required DC high voltage and on the other hand a variable AC high voltage for voltage conditioning supplies, a mounting device for the vacuum interrupter, which has a locking device on one side for the contact base point of the vacuum interrupter and on the opposite one Side a clamping and fixing device for the vacuum interrupter has, the clamping and fixing device with a linear drive device for moving the vacuum interrupter in manufacturing positions defined distances between the contacts of the vacuum interrupter for voltage conditioning, current conditioning or internal pressure measurement and is connected to a removal position, and wherein the locking device with a pneumatic drive for quick separation the contacts from the closed position at a defined distance equipped to ignite a direct current arc for current conditioning is.
- the system according to the invention is a Combination device in which the individual device components for several Procedures are used. Realizing stress conditioning, internal pressure measurement and current conditioning in one device furthermore enables a in a further development according to the invention automated sequence of all process steps, starting from the individual Component recognition, through process control to evaluation and Logging of the measurement results for the individual test objects.
- the invention is particularly characterized by the union of all three Functions in a single device: a single high-current transformer delivers on the one hand the coil current for the magnetic field of the internal pressure test, on the other others the DC current for current conditioning; a special high voltage generator firstly supplies the DC high voltage for the internal pressure test, secondly, a variable AC high voltage for the (breakdown) Conditioning as well as for the final dielectric strength test of the Vacuum interrupters.
- the high voltage generator can an AC voltage of 0 - 30 kV and a DC voltage of 0 - 20 kV be generated. It can be used for both voltage conditioning as well be used for the internal pressure measurement.
- the high voltage generator consists essentially of a control and monitoring unit, a electronically controlled high-voltage power supply, with which the DC voltage is adjustable, and an adjustable AC voltage source.
- the DC voltage conducts the internal pressure measurement when the magnetic field is applied to the coil on.
- the AC voltage is via a high voltage transformer with an upstream motor operated variable transformer adjustable and serves for voltage conditioning.
- the High voltage generator with a microprocessor-controlled operating and Display unit that shows the test parameters on a display. All functions of the high voltage generator are also via one isolated optical interface - optical interface - controllable. Commands and Messages are sent via fiber optics between the high voltage generator and Computer (PC) control unit that transmits the high voltage generator controls.
- PC Computer
- the high current transformer used in the device according to the invention has two tasks. The first is to create the coil to supply the magnetic field with direct current for the internal pressure measurement, so as to generate a homogeneous magnetic field within the vacuum tube. The second task is to provide DC power for power conditioning ,
- a transformer in the form of a three-phase thyristor is controlled as a high-current transformer Rectifier used.
- a direct current is lower Preserved ripple.
- the high current transformer should be able to generate an adjustable direct current in the range of up to 600 A.
- a smoothing capacitor can be connected in parallel to the coil the remaining ripple of the direct current smooth.
- you can use a device for cooling for example water cooling his. Coils which can be used for the device according to the invention are shown in able to briefly generate a magnetic field of up to 0.5 Tesla.
- the high current transformer with an additional interface to programmable logic controller (PLC). Via the interface the high current transformer can be controlled externally and its Messages are processed in the PLC.
- PLC programmable logic controller
- the interface points for the control signals for on and off of the DC circuit, signals vacuum arc does not burn or burn, signals for the setpoint of the direct current, Signals for the actual value of the direct current, signals for an existing short circuit, if the contacts of the vacuum interrupter are switched on DC are closed on.
- the magnetic field required for measuring the internal pressure is generated using a high-current coil generated, which is equipped with a cooling system. Is preferred the coil is cooled by water flowing through the waveguide of the coil and by means of a high pressure coolant pump with sufficient pressure provided.
- the flow achieved due to the pressure for example at a pressure of 50 bar, is necessary because it is for internal pressure measurement required magnetic field only through large currents of several 100 A. can be achieved, which in turn results in a strong heating of the coil pull.
- the cooling system of the solenoid is also monitored, for example by means of a flow meter and a temperature sensor. Also this measurement data is fed to the programmable logic controller and processed in it and in particular for controlling the flow used via the coolant pump.
- a high voltage generator is provided with which the device A sufficiently high voltage of up to 30 kV (AC) can be generated is.
- the high voltage generator used for the device is in the Able to generate both DC and AC voltage
- For voltage conditioning the AC voltage is used to maintain a uniform Conditioning both contact surfaces of the vacuum interrupter to reach.
- vacuum interrupters not installed in switching devices are always closed Condition, i.e. the contacts are on top of each other a device is required with which a defined distance between the Contacts can be set as precisely as possible.
- the device provided a linear drive. With the vacuum interrupter To be able to move the linear drive, it must be in a specially made one Holding device can be clamped. This holding device can then be connected to the linear drive and thus enables opening and closing Closing movements of the vacuum switch contacts. So that the contacts in the vacuum interrupter are pulled apart or moved together it is necessary to clamp the vacuum interrupter on both sides and additionally to lock on one side in the holding device. This locking takes place, for example, by means of a pneumatic device.
- the Linear drive enables a defined distance between the contact pieces, to manufacture the vacuum interrupter clamped in the device. It is necessary here for each clamped in the device as a test object Vacuum interrupter first the contact opening point by means of the linear drive to find the contacts. For the various functional tests Different distances between the contacts are required and depending on set the contact opening point found using the linear drive. By means of the linear drive, the clamped vacuum interrupter move between the inspection position and the removal position. in this connection the linear drive is automatically operated using the programmable logic Control (PLC) or in manual operation via one Handwheel or corresponding function keys of an operator terminal controlled.
- PLC programmable logic Control
- the linear drive only develops a relatively slow movement speed, on the other hand, it enables the drive to be accurate to 1/100 mm.
- the drive itself includes a DC motor, a servo amplifier, a position controller and a position control.
- the control of the DC motor is done in automatic mode by the PLC.
- the rotary motion the motor of the drive is turned into a with the help of a linear axis linear motion implemented, which makes it possible to change the position of the test object - Vacuum switching tube - to change.
- the linear axis preferably exists consisting of two spindles, which are connected by a cover plate, ensuring that these parts run in sync and high power transmission is.
- the spindle drive and the drive motor are over, for example a toothed belt connected to one another, which ensures slip-free operation precise position control allowed.
- the linear drive has an upper one and lower mechanical stop, using one stop as a reference point serves for the drive. In between are the removal positions for the Tube change and the test positions, the defined contact distances - Contact strokes - can be controlled via the PLC.
- the device is the design of the holder for the vacuum interrupter DUT, not only to retract the vacuum interrupter into a test position to enable, but beyond that for the different procedures required different states of the switch contacts or their distance to produce each other.
- the vacuum interrupter on a Side fixed with a clamping and fixing device, which is pneumatic has working cylinder for clamping the vacuum interrupter, which is controlled via the PLC.
- a locking device for the tube base - i.e. the contact base - provided the vacuum interrupter which is preferred as Rotary stroke cylinder is formed and on the one hand the locking of the vacuum interrupter serves and on the other hand a quick contact stroke for ignition a vacuum arc by separating the contacts.
- the rotary stroke cylinder can be a linear movement parallel to the axis of movement the contacts of the vacuum interrupter as well as a rotary movement To run.
- the rotary stroke cylinder is attached to the piston and gags or the like running perpendicular to the linear movement axis equipped that attached to the contact base of the vacuum interrupter Mechanics locked.
- a pneumatic cylinder is provided as a compensating cylinder, which has the task of the weight of the contact base of the vacuum interrupter to compensate for clamped mechanics, the one originating from it and force extending in the direction of the axis of movement of the contacts but is less than the force emanating from the linear drive, whereby a backlash-free linear movement with sufficient mechanical drive pressure is possible.
- a particular exact distance control of the contacts and adjustment of the same achieved with the help of the linear drive.
- a pneumatically operated isolator provided during the voltage conditioning and the internal pressure measurement is open so the high voltage does not roll over to the high current circuit.
- the separator is during the current conditioning closed to the high conditioning current to lead safely to the contact of the vacuum interrupter.
- For internal pressure measurement is the acquisition and preparation of the measured values for the through the vacuum interrupter flowing ion current and the applied high voltage provided by means of a measured value acquisition and evaluation system.
- the Acquisition and preparation of the measurement data takes place with the help of measurement amplifiers, those emitted by the measuring amplifiers, preferably in the form of light signals Signals are converted into digital voltage signals in a transient recorder converted to then processed in the PC control unit become.
- the PC can also use software to archive the data be equipped so that all measurement data of each test object, i.e. every vacuum interrupter can not only be recorded but also saved.
- the test object a vacuum interrupter 1
- the locking device for the contact base of the vacuum interrupter 1 is from a Rotary stroke cylinder 5, 5A formed, the pneumatic cylinder 5 in the direction of the arrow P1, P2 are movable. 5A toggle are attached to the piston, which by a Rotary movement of the rotary stroke cylinder locks the contact base point the vacuum interrupter in the holding device. Takes place after graduation Check the instruction to put the vacuum interrupter in the removal position to drive, the rotary stroke cylinders move upwards and the toggles 5A turn away from the vacuum interrupter, so that the extension distance is released for the vacuum interrupter.
- the clamping and fixing device 7 is with the linear drive 2,3 connected, 2 the linear axis, and 3 the drive module with the DC motor includes.
- the coil 4 is from the high current transformer 13 is fed and is further connected to a coolant pump 12 for cooling water connected.
- the high voltage generator is designated 11.
- the switch S3 is used to connect the coil current when measuring the internal pressure.
- the measuring amplifier 9 is used to record the internal pressure measurement applied voltage.
- the measuring amplifier 8 for recording the internal pressure current signal is switched on via switch S1.
- the switch S2 serves to connect the condition current during the current conditioning and voltage conditioning.
- the cooling device for the vacuum interrupter is schematic schematically in the current conditioning in the form of compressed air nozzles 10 indicated.
- the separator T which is by means of a pneumatic cylinder 6 can be operated to separate the high-current circuit from the high-voltage circuit as well as a safety earthing switch S4.
- the measuring amplifiers are to a measurement data acquisition and evaluation device 14 with a PC Control unit connected, which also the voltage from the high voltage generator 11 recorded.
- the clamped vacuum interrupter is between move the test positions and the removal position in the direction of the arrow P.
- the movement to disconnect the contacts for testing - current conditioning - takes place by means of the pneumatic device 5, 5A.
- the linear drive For voltage conditioning it is necessary to measure the distance between adjust the contacts of the vacuum interrupter as precisely as possible. Therefor the linear drive is used. The contacts can be pulled apart however only take place if the vacuum interrupter is locked on one side. If the linear drive is set in motion, it pulls depending on a contact piece with the installation position of the vacuum interrupter. To the Performing the voltage conditioning is the contact gap first adjusted with the linear drive. After that, the high voltage associated with the upper bracket of the switching tube is connected, switched on. In detail the contact opening point is found by moving the linear drive and then the linear drive to that assigned to the voltage conditioning Move contact stroke II, i.e.
- the pneumatic isolator T is opened, contact base the vacuum interrupter and the isolator are earthed, then the Instruction given via the PC "Voltage ON for voltage conditioning" and after the termination of the high-voltage release, the earthing of the isolator and the contact base of the vacuum interrupter canceled and the linear drive move into a waiting position for the Execution of a further sub-process.
- the internal pressure measurement is carried out with the invention Device according to the Penning or Magnetron method. prerequisite for this is a DC voltage source for generating an electrical one High voltage field and a magnetic field.
- the DC voltage will provided by the high voltage generator 11, which with the upper part of the holder H is connected by the vacuum interrupter.
- the Magnetic field is flowed through by a direct current through the water-cooled Coil 4 generated.
- the ignition of a discharge current within the Vacuum interrupter 1 requires that the contacts back through at a distance the defined contact stroke I must be brought so that the electrical and magnetic field lines between the upper contact and the Metal vapor screen of the vacuum interrupter partly perpendicular to each other stand. The distance is adjusted with the linear drive as before explained.
- the internal pressure measurement of the vacuum interrupter takes place in the first the desired contact distance, for example 2 mm, is set. Then the magnetic field and finally the high voltage are switched on. The charge current ignited is measured. Thus the following treatment steps for the internal pressure measurement.
- the Linear drive is used to reach and find the contact opening point move and then the linear drive to the desired set Move contact stroke I and reset after reaching position, whereby the two contacts of the vacuum interrupter on a defined distance are open.
- the disconnector T is then opened, and for safety reasons grounded, as well as the fixed contact base of the vacuum interrupter, so that the total voltage over the open contacts drops. Then the high voltage is released and instructed the PC to perform voltage pre-conditioning.
- the Voltage preconditioning prevents it from turning on suddenly The DC high voltage will breakdown, which the internal pressure measurement signal affect. After its completion, the release the high voltage and the grounding of the contact base and the disconnector withdrawn and now the measuring amplifier for recording the internal pressure current signal switched on. At the same time, the coolant pump 12 is switched on, whereby the high-current coil 4 is flowed through with cooling water. After that becomes the galvanic connection between coil 4 and the high current transformer 13 manufactured and the power supply switched on and then the Transformer current switched on.
- the current flow of the transformer 13 is interrupted and the release of the high voltage as well as the earthing of the disconnector, as well as the control the mains contactor of the transformer and then the galvanic connection separated between coil and transformer, then the measuring amplifier switched off, the coolant pump is switched off. Finally, the linear drive again set in motion and the vacuum interrupter in one Waiting position or removal position spent.
- Current conditioning requires the ignition of a vacuum arc conditioned the contact surfaces. This DC arc can be ignited by a current when the contacts of the vacuum interrupter are closed is switched on. By disconnecting the contacts to a desired defined one Distance -contact stroke III - the DC arc then arises can split into several partial arcs depending on the current.
- a pneumatic device is used with the contacts predefined contact distance - contact stroke III - can be set in Shape preferably of the rotary stroke cylinder 5, 5A. Before the pneumatic Device 5, 5A is used, the vacuum interrupter, such as described above, be locked.
- the one contact is jerky on the by means of the contact distance set by the linear drive and the DC arc can be ignited in this way.
- the opening of the contacts to the The purpose of igniting the DC arc is with the contact point locked the vacuum interrupter. As already described, these are locked by means of the toggle 5A of the rotary stroke cylinder. Then the rotary stroke cylinder 5 moved upwards parallel to the axis of movement of the contacts, whereby the contacts close. Then the arc ignition current switched on and the rotary stroke cylinder suddenly down again driven, whereupon a vacuum arc is created and the defined contact opening distance - Contact distance - is restored.
- the end positions of the Rotary stroke cylinders can be monitored using magnetic switches, for example become. Through this process, the current conditioning occurs only in each case one of the two contacts. The other contact is conditioned then in the same way after reversing the polarity of the power supply.
- the individual steps, switching operations to carry out the sub-processes voltage conditioning, internal pressure measurement or current conditioning can be programmed automatically using a programmable logic controller PLC run, the individual devices and switches are controlled accordingly. If a malfunction occurs, as well as if the Operators are reset to their basic state, if necessary the vacuum interrupter is also in a corresponding starting position spent by means of the linear drive.
- an actuator (not shown here) for generating and transmitting a mechanical shock pulse to the vacuum interrupter to be tested for igniting the discharge current, since the Penning discharge at internal pressures in the range of • 10 -7 mbar does not always ignite promptly, but it can be triggered by shock impulse-initiated desorption of loosely bound residual gas molecules.
- the shock transmission can be purely mechanical, e.g. B. via a ratchet / cam disk, but preferably electromechanically via switch armature, protective drive or piezo stack actuator.
- This mechanical pulse generator including a control can also be integrated into the programmable logic controller of the device for carrying out the three functional tests.
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Abstract
Description
- Figur 1:
- den Aufbau einer erfindungsgemäßen Vorrichtung in schematischer Darstellung;
- Figur 2:
- eine tabellarische Darstellung der wesentlichen Schaltzustände und damit auch der Prinzipschaltbilder zur Realisierung der drei Grundfunktionen Innendruckmessung, Spannungskonditionierung und Stromkonditionierung.
Claims (20)
- Vorrichtung zur Innendruckmessung, Spannungskonditionierung und Stromkonditionierung von Vakuumschaltröhren, umfassend eine Spule (4) zur Magnetfelderzeugung für die Innendruckmessung, einen Hochstromtransformator (13), der den Spulenstrom zum Aufbau des Magnetfeldes sowie den DC-Strom für die Stromkonditionierung liefert, einen Hochspannungsgenerator (11), der einerseits die für die Innendruckmessung benötigte DC-Hochspannung und andererseits eine variierbare AC-Hochspannung für die Spannungskonditionierung liefert, eine Halterungsvorrichtung für die Vakuumschaltröhre (1), die auf einer Seite eine Arretierungsvorrichtung (5, 5A) für den Kontaktfußpunkt der Vakuumschaltröhre und auf der gegenüberliegenden Seite eine Einspann- und Fixiervorrichtung (7) für die Vakuumschaltröhre aufweist, wobei die Einspann- und Fixiervorrichtung (7) mit einer Linearantriebsvorrichtung (2, 3) zum Verfahren der Vakuumschaltröhre in Positionen zum Herstellen definierter Abstände zwischen den Kontakten der Vakuumschaltröhre für die Spannungskonditionierung, Stromkonditionierung und Innendruckmessung und in eine Entnahmeposition verbunden ist, und wobei die Arretierungsvorrichtung mit einem pneumatischen Antrieb zum schnellen Auseinanderfahren der Kontakte aus der Schließposition auf einen definierten Abstand zum Zünden eines Gleichstromvakuumbogens für die Stromkonditionierung ausgestattet ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass eine speicherprogrammierbare Steuerung (SPS) zum nacheinander Durchführen der einzelnen Schalthandlungen für die Spannungskonditionierung, Innendruckmessung und Stromkonditionierung vorgesehen ist.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass ein Hochstromtransformator (13) mit Dreiphasen-Thyristor-gesteuerter Gleichrichter vorgesehen ist, dem ein Wandler und eine Schnittstelle zur speicherprogrammierbaren Steuerung (SPS) zugeordnet ist, um die Messsignale an die SPS zu übermitteln und den Gleichrichter extern zu steuern.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Hochstromgenerator (11) mit einer mikroprozessorgesteuerten Bedien- und Anzeigeeinheit ausgestattet ist und über ein isoliertes optisches Interface fernsteuerbar ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass als Spule (4) eine mit einer Wasserkühlung mit Kühlmittelpumpe ausgestattete Hochstromspule vorgesehen ist.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass die Linearantriebsvorrichtung eine Linearachse (2) mit mindestens einer Spindel und einem Antriebsmodul mit Gleichstrommotor (3) zur Positionierung der Vakuumschaltröhre bzw. der Kontakte der Vakuumschaltröhre zueinander umfasst, wobei die Steuerung des Antriebsmoduls durch die SPS über eine Schnittstelle erfolgt.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass zur Trennung des Hochstromkreises von dem Hochspannungskreis ein pneumatisch betätigter Trenner (T) vorgesehen ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass zum Einspannen und Fixieren der Vakuumschaltröhre bzw. zum Arretieren des Kontaktfußpunktes der Vakuumschaltröhre jeweils Pneumatikzylinder (7, 5, 5A) vorgesehen sind.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass als Arretierungsvorrichtung ein Dreh-Hubzylinder (5, 5A) vorgesehen ist, der eine schnelle lineare Bewegung längs einer Zylinder-Kolbenachse zwecks Schließung und Auseinanderfahren der Kontakte zum Erreichen eines definierten Abstandes ausführt und eine Drehbewegung zwecks Arretierung mittels senkrecht zur linearen Zylinder-Kolbenachse am Kolben angebrachter Knebel ausführt.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass eine Kühleinrichtung (10) zur Kühlung der Vakuumschaltröhre vorgesehen ist, die gegebenenfalls mittels einer SPS während der Stromkonditionierung zuschaltbar ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass zur Messung des Innendruckes ein Messverstärker (8) zur Aufnahme des Innendruckstromsignals während der Innendruckmessung und ein Messverstärker (9) zur Aufnahme der bei der Innendruckmessung anliegenden Spannung vorgesehen ist, die an eine Messdatenerfassung- und Auswertevorrichtung (PC) angeschlossen sind.
- Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass ein Schalter (S1) zum Zuschalten des Messverstärkers (8) für das Innendruck-Stromsignal bei der Innendruckmessung zwischen Messverstärker (8) und Kontaktfußpunkt der Vakuumschaltröhre vorgesehen ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Schalter (S2) zum Zuschalten des Stromes des Hochstromtransformators bei der Spannungskonditionierung bzw. Stromkonditionierung zwischen dem Kontaktfußpunkt der Vakuumschaltröhre und dem Hochstromtransformator angeordnet ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Schalter (S3) zum Zuschalten des Stromes des Hochstromtransformators zur Spule (4) für die Innendruckmessung zwischen Hochstromtransformator und Spule vorgesehen ist.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass ein Sicherheitserdungsschalter (S4) dem Trenner (T) zugeordnet ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass ein Aktor zur Erzeugung und Übertragung eines mechanischen Stoßimpulses bei der Innendruckmessung auf die zu prüfende Vakuumschaltröhre vorgesehen ist.
- Verfahren zur Innendruckmessung für Vakuumschaltröhren mit einer Vorrichtung gemäß Anspruch 1, bei dem eine Spannungsvorkonditionierung mit anschließender Innendruckmessung mit automatisch ablaufenden Schalthandlungen durchgeführt wird, wobei die zu prüfende Vakuumschaltröhre mittels der Linearantriebsvorrichtung (2, 3) in eine Position des Kontaktöffnungspunktes verfahren wird und danach mittels der Linearantriebsvorrichtung (2, 3) ein definierter Abstand in Form des Kontakthubes I in Bezug auf den aufgefundenen Kontaktöffnungspunkt unter Öffnung der Kontakte durchgeführt wird, der Hochstromkreis von dem Hochspannungskreis durch Öffnen eines Trenners (T) getrennt wird, ein dem Trenner (T) zugeordneter Sicherheitserdungsschalter (S4) geöffnet wird, ebenso ein Schalter (S2), der zum Zuschalten des Stromes des Hochstromtransformators bei der Spannungskonditionierung bzw. Stromkonditionierung zwischen dem Kontaktfußpunkt der Vakuumschaltröhre und dem Hochstromtransformator angeordnet ist, und nach Hochspannungsfreigabe zur Spannungsvorkonditionierung und Zuschalten eines Messverstärkers (8), der zur Aufnahme des Innendruckstromsignals während der Innendruckmessung vorgesehen ist, durch Schließen eines Schalters (S1), der zum Zuschalten des Messverstärkers (8) für das Innendruck-Stromsignal bei der Innendruckmessung zwischen Messverstärker (8) und Kontaktfußpunkt der Vakuumschaltröhre vorgesehen ist, anschließend unter Beaufschlagung mit Hochspannung die Innendruckmessung bei einem geschlossene Schalter (S3), der zum Zuschalten des Stromes des Hochstromtransformators zur Spule (4) für die Innendruckmessung zwischen Hochstromtransformator und Spule vorgesehen ist, durchgeführt wird.
- Verfahren zur Spannungskonditionierung einer Vakuumschaltröhre nach Anspruch 17, das mit automatisch ablaufenden Schalthandlungen durchgeführt wird, wobei die zu prüfende Vakuumschaltröhre mittels der Linearantriebsvorrichtung (2, 3) in eine Position des Kontaktöffnungspunktes verfahren wird und danach mittels der Linearantriebsvorrichtung (2, 3) der Abstand mittels des Kontakthubes II in Bezug auf den aufgefundenen Kontaktöffnungspunkt unter Öffnung der Kontakte durchgeführt wird, der Hochstromkreis von dem Hochspannungskreis durch Öffnen des Trenners (T) getrennt wird und der Sicherheitserdungsschalter (S4) geöffnet wird, sowie die Schalter (S1) und (S2) geöffnet sind, und danach die Hochspannungsfreigabe für die Spannungskonditionierung der Vakuumschaltröhre bei geschlossenem Schalter (S2) durchgeführt wird.
- Verfahren zur Stromkonditionierung einer Vakuumschaltröhre nach Anspruch 17, das mit automatisch ablaufenden Schalthandlungen durchgeführt wird, wobei die zu prüfende Vakuumschaltröhre mittels der Linearantriebsvorrichtung (2, 3) in eine Position des Kontaktöffnungspunktes verfahren wird und danach mittels der Linearantriebsvorrichtung (2, 3) der Abstand in Form des Kontakthubes III in Bezug auf den aufgefundenen Kontaktöffnungspunkt und der Öffnung der Kontakte durchgeführt wird, der Hochstromkreis und der Hochspannungskreis durch Schließen des Trenners (T) verbunden sind, die Schalter (S1, S3, S4) geöffnet sind und die Vakuumschaltröhre mit Strom zur Konditionierung durch Schließen des Schalters (S2) beaufschlagt wird.
- Verfahren nach Anspruch 17, dadurch gekennzeichnet, dass die Teilprozesse der Innendruckmessung, Spannungskonditionierung und Stromkonditionierung aufeinanderfolgend an einer Vakuumschaltröhre durchgeführt werden, wobei die Teilprozesse jederzeit abbrechbar sind und die angesteuerten Geräte einschließlich der zu prüfenden Vakuumschaltröhre in ihren Grundzustand zurückversetzt werden.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19942971A DE19942971A1 (de) | 1999-09-09 | 1999-09-09 | Vorrichtung zur Innendruckmessung, Spannungskonditionierung und Stromkonditionierung von Vakuumschaltröhren und Verfahren hierfür |
DE19942971 | 1999-09-09 | ||
PCT/EP2000/007764 WO2001018834A1 (de) | 1999-09-09 | 2000-08-10 | Vorrichtung zur innendruckmessung, spannungskonditionierung und stromkonditionierung von vakuumschaltröhren und verfahren hierfür |
Publications (2)
Publication Number | Publication Date |
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EP1212768A1 EP1212768A1 (de) | 2002-06-12 |
EP1212768B1 true EP1212768B1 (de) | 2003-10-22 |
Family
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Application Number | Title | Priority Date | Filing Date |
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EP00964008A Expired - Lifetime EP1212768B1 (de) | 1999-09-09 | 2000-08-10 | Vorrichtung zur innendruckmessung, spannungskonditionierung und stromkonditionierung von vakuumschaltröhren und verfahren hierfür |
Country Status (3)
Country | Link |
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EP (1) | EP1212768B1 (de) |
DE (2) | DE19942971A1 (de) |
WO (1) | WO2001018834A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102016108245A1 (de) | 2016-05-03 | 2017-11-09 | Eaton Electrical Ip Gmbh & Co. Kg | Schaltvorrichtung zum Führen und Trennen von elektrischen Strömen |
DE102020204312B3 (de) * | 2020-04-02 | 2021-09-30 | Siemens Aktiengesellschaft | Verfahren zum zweistufigen Formieren von Kontakten einer Vakuumschaltvorrichtung und Vakuumschaltvorrichtung, konfiguriert das Verfahren auszuführen |
CN114089145B (zh) * | 2021-11-19 | 2023-06-09 | 西安西电电力系统有限公司 | 一种可移式多路晶闸管长期耐压试验设备及试验方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3575656A (en) * | 1968-08-30 | 1971-04-20 | Ite Imperial Corp | Method and apparatus for measuring pressure in vacuum interrupters |
DE3347176A1 (de) * | 1983-12-27 | 1985-07-04 | Siemens AG, 1000 Berlin und 8000 München | Vorrichtung zum messen des innendrucks eines betriebsmaessig eingebauten vakuumschalters |
DE3539748A1 (de) * | 1985-11-09 | 1987-05-21 | Sachsenwerk Ag | Pruefeinrichtung fuer vakuumschaltkammern |
DE4203757C2 (de) * | 1992-02-10 | 2002-08-01 | Abb Patent Gmbh | Verfahren zum Prüfen des Vakuums einer elektrischen Vakuumschaltkammer sowie Einrichtung zur Durchführung des Verfahrens |
DE19714655C2 (de) * | 1997-04-09 | 2002-10-17 | Abb Patent Gmbh | Verfahren und Vorrichtung zum Konditionieren einer Vakuumschaltkammer |
-
1999
- 1999-09-09 DE DE19942971A patent/DE19942971A1/de not_active Withdrawn
-
2000
- 2000-08-10 EP EP00964008A patent/EP1212768B1/de not_active Expired - Lifetime
- 2000-08-10 DE DE50004191T patent/DE50004191D1/de not_active Expired - Fee Related
- 2000-08-10 WO PCT/EP2000/007764 patent/WO2001018834A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
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WO2001018834A1 (de) | 2001-03-15 |
EP1212768A1 (de) | 2002-06-12 |
DE50004191D1 (de) | 2003-11-27 |
DE19942971A1 (de) | 2001-03-15 |
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