CN112219251A - On-load tap changer and method for operating an on-load tap changer - Google Patents
On-load tap changer and method for operating an on-load tap changer Download PDFInfo
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- CN112219251A CN112219251A CN201980037103.6A CN201980037103A CN112219251A CN 112219251 A CN112219251 A CN 112219251A CN 201980037103 A CN201980037103 A CN 201980037103A CN 112219251 A CN112219251 A CN 112219251A
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- contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0016—Contact arrangements for tap changers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0027—Operating mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Keying Circuit Devices (AREA)
- Protection Of Transformers (AREA)
Abstract
The invention relates to an on-load tap changer comprising: -a first fixed contact, -a second fixed contact, -a first movable contact contactable with each of the fixed contacts, -a second movable contact contactable with each of the fixed contacts, -a main branch with a switching element, the main branch being able to connect the first movable contact with a load lead, -an auxiliary branch with a varistor, the auxiliary branch being able to connect the second movable contact with a load lead, wherein-the load tap changer is designed such that the first movable contact is only actuated when the second movable contact has reached the second fixed contact when switching from the first fixed contact to the second fixed contact.
Description
Technical Field
The present invention relates to an on-load tap changer and a method for operating such an on-load tap changer.
Background
On-load tap changers are used for switching between the winding taps of a transformer without interruption. In known on-load tap changers according to the rapid resistance switching principle, a ring current, which flows during the switching process during the simultaneous contact making of the tap contact that is switched in real time and the preselected new tap contact, is limited by the ohmic resistance and thus ensures an uninterrupted change of the transformation ratio of the transformer. The ohmic resistors must be designed to correspond to the specific circuit topology, the specific operating conditions and the respective application of the load current and the tap voltage, in particular of the on-load tap changer. The voltage occurring between the live tap contact and the preselected tap contact of the on-load tap changer is referred to as the tap voltage. This resistor design is complex on the one hand and also has an influence on the overall structural design of the tap changer on the other hand. Depending on the application, different numbers and sizes of resistors are required. The design of the resistance value therefore has an influence on the one hand on the structural space required for the resistance and thus on the structural design of the remaining tap changer components.
Disclosure of Invention
The object of the invention is therefore: an improved solution for a tap changer is provided, which can be adapted more easily to different applications.
The object is achieved by the solution of the independent claims. Further embodiments are described in the dependent claims.
The improvement is based on the following concept: the varistor is integrated as a current-limiting element in the auxiliary branch of the on-load tap changer. A varistor is a resistive structural element whose resistance value is dependent on the applied voltage.
According to the above-described further development, an on-load tap changer is proposed for switching between winding taps of a control winding of a transformer without interruption. The uninterrupted switching takes place in particular between adjacent winding taps of the regulating winding. The on-load tap changer comprises a first fixed contact, a second fixed contact, a first movable contact and a second movable contact. The fixed contact can be connected to a winding tap of the regulating winding of the transformer. The two movable contacts are designed in such a way that they can contact each of the fixed contacts. Furthermore, the on-load tap changer comprises a main branch with a switching element, an auxiliary branch with a varistor and a load lead. The main branch can connect the first movable contact to a load line via the switching element, and the auxiliary branch can connect the second movable contact to a load line via the varistor. In this case, the on-load tap changer is designed such that, when switching from the first fixed contact to the second fixed contact, the first movable contact is only actuated when the second movable contact has reached, in particular is in contact with, the second fixed contact.
In the rest position, i.e. after the end of one load changeover and before the start of the next load changeover, the two movable contacts are, for example, on the same fixed contact.
Furthermore, a movable contact makes contact with only one fixed contact at all times, i.e. the movable contact does not occupy a bridging position between two adjacent fixed contacts.
The varistor is preferably dimensioned such that it is in the latched state when a voltage which is less than or equal to the tap voltage drops via the varistor. The locked state is characterized by: no significant current flows through the varistor. In particular, the current flowing through the varistor during the locked state is so low that the movable selector contact can be separated from the fixed contact or connected to the fixed contact without being damaged by the fixed contact. Typically, this is the case when the current intensity is less than 100mA, preferably less than 10 mA. This locked state of the varistor is obtained in particular even when the tap changer is in a rest position in which the two movable contacts are on the same fixed contact and the auxiliary branch is thereby short-circuited by the parallel main branches.
The varistor is preferably dimensioned such that the voltage drop across the varistor in a phase during which a load current, for example in the order of a few tens of a, for example 30A, flows through the varistor is a multiple of the tapping voltage, for example approximately 1.2 to 1.5 times the tapping voltage. Preferably, the voltage drop is less than a predetermined extreme value, for example less than 2.0 times the tapping voltage.
The varistor is preferably designed as a metal oxide varistor, for example based on zinc oxide, since the current-voltage characteristic of the metal oxide runs closer to the ideal characteristic of the varistor.
Since the varistor is in the locked state in which no significant current flows through it or in the open state in which the load current flows through it, no loop current occurs during the switching sequence. Therefore, the duration of the loss occurring in the varistor is shorter than in applications in which an ohmic resistor is used as a transfer resistor.
When an ohmic resistor is used as the transfer resistor, the output voltage of the transformer decreases the voltage drop caused by the load current across the resistor during the time period in which the load current flows through the resistor. This voltage disturbance should not exceed a certain multiple, for example 5 times, preferably 2.0 times, of the tap voltage for voltage quality reasons. As a result, if necessary, different resistors for different load currents need not be used when the tap voltages are the same. When using a varistor according to the improvement, the disturbance of the output voltage of the transformer is substantially independent of the load current. This is demonstrated by the typical current-voltage characteristic of the varistor according to the described development and the sudden drop in its different resistances during the transition from the locked state to the open state. The selection of a suitable varistor is therefore not significantly dependent on the load current, but only on the tap voltage. In most cases, this makes it possible to dispense with complex designs of the switching resistors and their associated design of the on-load tap changer in different applications and thus to greatly simplify the overall tap changer design and assembly. The tap changer can be prefabricated as an inventory, for example, for a determined tap voltage, independently of the actual load current.
In at least one embodiment, the on-load tap changer is designed such that, when switching from the second fixed contact to the first fixed contact, the second movable contact is only actuated when the first movable contact has reached, in particular has contacted, the first fixed contact.
In at least one embodiment, the on-load tap changer is designed such that, when switching from the second fixed contact to the first fixed contact, the first movable contact is only actuated when the second movable contact has reached, in particular has contacted, the first fixed contact.
In at least one embodiment, the switching element is designed as a circuit breaker, for example as a vacuum interrupter, i.e. the switching element can assume a closed position in which a load current can flow or an open position in which the load current is interrupted.
In at least one embodiment, the first contact point and the second contact point each have a first contact surface and a second contact surface that is different from the first contact surface, wherein the respective first contact surface can be contacted by the first movable contact point and the respective second contact surface can be contacted by the second movable contact point. In particular, the respective second contact surface is not contactable by the first movable contact, and the respective first contact surface is not contactable by the second movable contact.
According to the further development, a method for operating an on-load tap changer is also specified, wherein the on-load tap changer comprises at least one first and one second movable contact and a load line. According to the method, the load current is switched from the main branch to the auxiliary branch when switching from the first fixed contact to the second fixed contact. The load current in the auxiliary branch is limited by means of a varistor and the first movable contact is only actuated when the second movable contact has reached the second fixed contact. The load current is then switched from the auxiliary branch to the main branch.
In at least one embodiment, the load current is switched from the main branch to the auxiliary branch when switching from the second fixed contact to the first fixed contact. The load current in the auxiliary branch is limited by means of a varistor and the second movable contact is actuated only when the first movable contact has reached the first fixed contact.
In at least one embodiment, the load current is switched from the main branch to the auxiliary branch when switching from the second fixed contact to the first fixed contact. The load current in the auxiliary branch is limited by means of a varistor and the first movable contact is actuated only when the second movable contact has reached the first fixed contact.
According to at least one embodiment, the switching direction is changed from a first stationary state, in which both the movable contacts make contact with the first fixed contact, to a second stationary state, in which both the movable contacts make contact with the second fixed contact.
According to at least one embodiment, the switching is carried out in a second switching direction from a second rest state, in which both the movable contacts make contact with the second fixed contact, into a first rest state, in which both the movable contacts make contact with the first fixed contact.
According to at least one embodiment, the second movable contact is separated from the first fixed contact and is contacted with the second fixed contact in a first switching direction. The load current is then switched from the primary branch to the secondary branch. The first movable contact is then separated from the first fixed contact and brought into contact with the second fixed contact.
In at least one embodiment, the load current is switched from the main branch to the auxiliary branch in a second switching direction. The first movable contact is then separated from the second fixed contact and brought into contact with the first fixed contact. The load current is then switched from the auxiliary branch to the main branch and the second movable contact is then separated from the second fixed contact and brought into contact with the first fixed contact.
According to at least one embodiment, the second movable contact is separated from the second fixed contact and is contacted with the first fixed contact in a second switching direction. The load current is then switched from the primary branch to the secondary branch. The first movable contact is then separated from the second fixed contact and brought into contact with the first fixed contact.
In at least one embodiment, in step a, the switching element is closed or held closed and the second movable contact is separated from the second fixed contact and is contacted with the first fixed contact. Then, the switching element is turned off in step b and thereby the first movable contact is separated from the load lead, and then the first movable contact is separated from the first fixed contact and brought into contact with the second fixed contact in step c. Then, in step d, the switching element is closed and thereby the first movable contact is connected with the load lead. The load current now flows through the main branch again. Preferably, step b is carried out after step a, step c after step b and step d after step c, wherein "after" means in particular "directly after".
According to at least one embodiment, in step a', the switching element is opened and the first movable contact is thereby separated from the load line. The first movable contact is then separated from the second fixed contact and brought into contact with the first fixed contact in step b'. In step c', the switching element is then closed again and the load current is thereby switched from the auxiliary branch to the main branch. Finally, the second movable contact is separated from the second fixed contact and brought into contact with the first fixed contact in step d'. Preferably, step b 'is carried out after step a', step c 'is carried out after step b', and step d 'is carried out after step c', wherein "after" means in particular "directly after".
According to at least one further embodiment, the second movable contact is separated from the second fixed contact and brought into contact with the first fixed contact in step a ". In the next step b "the switching element is opened and the first movable contact is separated from the load lead, and then in step c" the first movable contact is separated from the second fixed contact and brought into contact with the first fixed contact. Then, in step d ", the switching element is closed and the first movable contact is again connected to the load lead. The load current now flows through the main branch again. Preferably, step b "is carried out after step a", step c "is carried out after step b" and step d "is carried out after step c", wherein "after" particularly means "directly after".
Other embodiments of the on-load tap changer are directly derived from the different design of the method or vice versa.
Drawings
The invention is explained in detail below with the aid of exemplary embodiments with reference to the drawings. Components that are functionally identical or have the same effect may be provided with the same reference numerals. Identical components or components having the same function may be explained only with reference to the figures in which they first appear. The explanation is not necessarily repeated in the following drawings.
In the drawings:
fig. 1 shows a schematic diagram of an exemplary embodiment of an on-load tap changer according to the improvement;
fig. 2a to 2d show an exemplary switching process and an exemplary method in an on-load tap changer according to the improvement;
fig. 2e shows an exemplary current-voltage characteristic of the varistor according to the further development;
fig. 3a to 3d show a further exemplary switching process and a further exemplary method in an on-load tap changer according to the improvement;
fig. 4a to d show a further exemplary switching process and a further exemplary method of an on-load tap changer according to the improvements.
Detailed Description
Fig. 1 shows a schematic diagram of an exemplary embodiment of an on-load tap changer for switching without interruption between winding taps of a regulating winding 11 of a transformer (not shown). According to this development, the on-load tap changer 1 comprises at least a first fixed contact 2 and a second fixed contact 3, which can be connected to a winding tap of a control winding 11 of the transformer. The total number of fixed contacts is related to the number of winding taps. Each fixed contact 2, 3 has a first contact surface 2.1, 3.1 and a second contact surface 2.2, 3.2. Furthermore, the on-load tap changer 1 comprises a first movable contact 4 and a second movable contact 5, which can each contact a respective fixed contact of the control winding. The first movable contact 4 can contact the first contact surfaces 2.1, 3.1 of the fixed contacts 2, 3, but not the second contact surfaces 2.2, 3.2. Correspondingly, the second movable contact 5 can contact the second contact surfaces 2.2, 3.2 of the fixed contacts 2, 3, but not the first contact surfaces 2.1, 3.1. Fig. 1 shows a schematic sketch of an exemplary embodiment of an on-load tap changer, in particular the arrangement of the contact surfaces 2.1, 1.2 and 3.1, 3.2 opposite one another is not absolutely necessary.
Fig. 1 shows a rest state of an on-load tap changer 1 in which two movable contacts 4, 5 contact the same fixed contact 2. Load current ILFrom the first movable contact 4 via the main branch 6 to the load lead 10 via the closed switching element 8. The varistor 9 is in the locked state because the auxiliary branch 7 is short-circuited by the parallel main branch 6.
The main branch 6 connects the first movable contact 4 with the load lead 10 via the switching element 8. The switching element 8 is preferably designed as a vacuum interrupter. The auxiliary branch 7 connects the second movable contact 5 via a varistor 8 likewise to the load lead 10.
Fig. 2a to 2d show an exemplary switching process of the new on-load tap changer 1, in which a first fixed contact 2 is switched to a second fixed contact 3 or to a corresponding winding tap.
In step a (see fig. 2a), the switch is switchedThe element 8 is closed or remains closed. Thus, the load current ILFlows through the main branch 6 and the second movable contact 5 can be separated from the first fixed contact 2 without current. After the movable contact 5 has been contacted with the second fixed contact 3, the tapping voltage drops via the varistor 9. The current flowing in this case is so small that it does not damage the selector when the second fixed contact 3 is contacted. The second movable contact 5 contacts the corresponding second contact surfaces 2.2, 2.3 of the fixed contacts 2, 3.
In step b (see fig. 2b), the switching element 8 is opened. Thereby separating the first movable contact 4 from the load lead 10 and passing the load current ILSwitching from the main branch 6 to the auxiliary branch 7. The voltage drop across the varistor 9 rises, for example, to approximately 1.2 to 1.5 times the tapping voltage. Fig. 2e schematically shows the current-voltage characteristic of a varistor used according to the above-described modification, for example a metal oxide varistor based on zinc oxide. This makes it possible to identify: the voltage drop is not significantly related to the current in the off-state.
In step c (see fig. 2c), the first movable contact 4, which is now no longer traversed by current, is separated from the first fixed contact 2 and is contacted with the second fixed contact 3. In this case, the first movable contact 4 first contacts the first contact surface 2.1 of the first fixed contact 2 and then contacts the first contact surface 3.1 of the second fixed contact 3.
In step d (see fig. 2d), the switching element 8 is closed again. The first movable contact 4 is now again connected to the load line 10 and carries the current ILAnd flows through the main branch 6. The varistor 9 is again in the locked state and the tap changer is again in the rest position, in which the two movable contacts 4, 5 make contact with the second fixed contact 3.
Fig. 3a to 3d show a further exemplary switching sequence of the on-load tap changer 1 according to the new variant, in which switching takes place from the second fixed contact 3 to the first fixed contact 2.
In step a' (see fig. 3a), the switching element 8 is opened. Thereby separating the first movable contact 4 from the load lead 10 andand will load current ILSwitching from the main branch 6 to the auxiliary branch 7. The voltage drop across the varistor rises, for example, to approximately 1.2 to 1.5 times the tapping voltage.
In step b' (see fig. 3b), the first movable contact 4, which is now no longer traversed by current, is separated from the second fixed contact 3 and is contacted with the first fixed contact 2.
In step c' (see fig. 3c), the switching element 8 is closed again, so that the first movable contact 4 is again connected to the load line 10 and the load current ILFlows through the main branch 6. The varistor 9 enters a locked state, in which the tap voltage drops via the varistor.
In step d' (see fig. 3d), the second movable contact 5 is galvanically separated from the second fixed contact 3 and is contacted with the first fixed contact 2. Since the varistor 9 is in the locked state, the current flowing through the auxiliary branch 7 is so small that it does not damage the selector when the first fixed contact 2 is contacted. The tap changer is now again in a rest position in which both movable contacts B1, B2 contact the first fixed contact 3. The varistor 9 is in the locked state because the auxiliary branch 7 is short-circuited by the parallel main branch 6.
Fig. 4a to 4d show a further exemplary switching sequence of an on-load tap changer 1 according to the new concept, in which the second fixed contact 3 is likewise switched to the first fixed contact 2.
In step a "(see fig. 4a), the second movable contact 5 is separated from the second fixed contact 3 without current, since the switching element 8 is closed and thus the load current ILFlows through the main branch 6. When the second movable contact 5 has contacted the first fixed contact 2, the tap voltage drops via the varistor 9. The current flowing in this case is so small that it does not damage the selector when the first fixed contact 2 is contacted.
In step b "(see fig. 4b), the switching element 8 is opened. Thereby separating the first movable contact 4 from the load lead 10 and passing the load current ILSwitching from the main branch 6 to the auxiliary branch 7. Warp beamThe voltage drop by the varistor 9 rises to approximately 1.2 to 1.5 times the tapping voltage.
In step c "(see fig. 4c), the first movable contact 4, which is now no longer traversed by current, is separated from the second fixed contact 3 and is contacted with the first fixed contact 2.
In step d "(see fig. 4d), the switching element 8 is closed again. The first movable contact 4 is now again connected to the load line 10 and carries the current ILAnd flows through the main branch 6. The varistor 9 is again in the locked state and the tap changer is again in the rest position, in which both movable contacts B1, B2 contact the first fixed contact 2.
List of reference numerals
1 tap switch
2 first fixed contact
3 second fixed contact
4 first movable contact
5 second movable contact
6 Main branch
7 auxiliary branch
8 switching element
9 pressure sensitive resistor
10 load lead
11 regulating the winding.
Claims (13)
1. An on-load tap changer, the on-load tap changer comprising:
-a first fixed contact point for the first contact,
-a second fixed contact point for the first fixed contact point,
-a first movable contact capable of contacting each of said fixed contacts,
-a second movable contact capable of contacting each of said fixed contacts,
a main branch with a switching element, which main branch is able to connect the first movable contact with a load lead,
-an auxiliary branch with a varistor capable of connecting the second movable contact with the load lead,
wherein the content of the first and second substances,
the on-load tap changer is designed such that the first movable contact is only actuated when the second movable contact has reached the second fixed contact when switching from the first fixed contact to the second fixed contact.
2. On-load tap changer according to the preceding claim,
the on-load tap changer is designed such that the second movable contact is only actuated when the first movable contact has reached the first fixed contact when switching from the second fixed contact to the first fixed contact.
3. The on-load tap changer of claim 1,
the on-load tap changer is designed such that the first movable contact is only actuated when the second movable contact has reached the first fixed contact when switching from the second fixed contact onto the first fixed contact.
4. On-load tap changer according to any one of claims 1 to 3,
the switching element is designed as a circuit breaker.
5. On-load tap changer according to any one of claims 1 to 3,
-each of the fixed contacts has a first contact surface contactable by the first movable contact,
-each of said fixed contacts has a second contact surface contactable by said second movable contact.
6. Method for operating an on-load tap changer having a first and a second movable contact, a first and a second fixed contact and a load lead, and being constructed in particular according to any of the preceding claims, wherein,
-switching a load current I on switching from the first fixed contact to the second fixed contactLSwitching from the primary branch to the secondary branch;
-limiting the load current in the auxiliary branch by means of a varistor; and is
-manipulating the first movable contact only when the second movable contact has reached the second fixed contact.
7. Method according to the preceding claim, wherein,
-switching a load current I on switching from the second fixed contact to the first fixed contactLSwitching from the primary branch to the secondary branch;
-limiting the load current in the auxiliary branch by means of a varistor; and is
-operating the second movable contact only when the first movable contact has reached the first fixed contact.
8. The method of claim 6, wherein,
-switching a load current I on switching from the second fixed contact to the first fixed contactLSwitching from the primary branch to the secondary branch;
-limiting the load current in the auxiliary branch by means of a varistor; and is
-operating the first movable contact only when the second movable contact has reached the first fixed contact.
9. The method according to any one of claims 6 to 8,
-switching in a first switching direction from a first rest state, in which both the movable contacts make contact with the first fixed contact, into a second rest state, in which both the movable contacts make contact with the second fixed contact;
in a second switching direction, from a second rest state, in which both the movable contacts make contact with the second fixed contact, into a first rest state, in which both the movable contacts make contact with the first fixed contact.
10. The method according to claim 9, wherein, in a first switching direction,
-separating the second movable contact from the first fixed contact and making contact with the second fixed contact;
then applying the load current ILSwitching from the primary branch to the secondary branch;
-then separating the first movable contact from the first fixed contact and making contact with the second fixed contact.
11. Method according to claim 9 or 10, wherein, in the second switching direction,
-applying a load current ILSwitching from the primary branch to the secondary branch,
-then separating the first movable contact from the second fixed contact and making contact with the first fixed contact;
then applying the load current ILSwitching from the auxiliary branch to the main branch;
-then separating the second movable contact from the second fixed contact and making contact with the first fixed contact.
12. Method according to claim 9 or 10, wherein, in the second switching direction,
-separating the second movable contact from the second fixed contact and making contact with the first fixed contact;
then applying the load current ILSwitching from the primary branch to the secondary branch;
-then separating the first movable contact from the second fixed contact and making contact with the first fixed contact.
13. The method according to any one of claims 6 to 12,
-in step a, the switching element is closed or kept closed and the second movable contact is separated from the first fixed contact and is contacted with the second fixed contact;
-in step b, opening the switching element and thereby separating the first movable contact from the load lead;
-in step c, separating the first movable contact from the first fixed contact and making contact with the second fixed contact;
-in step d, closing the switching element and thereby connecting the first movable contact with the load lead.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018113982.9 | 2018-06-12 | ||
| DE102018113982.9A DE102018113982B4 (en) | 2018-06-12 | 2018-06-12 | LOAD TAP SWITCH AND METHOD FOR ACTUATING A LOAD TAP SWITCH |
| PCT/EP2019/065200 WO2019238669A1 (en) | 2018-06-12 | 2019-06-11 | On-load tap-changer and method for actuating an on-load tap-changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112219251A true CN112219251A (en) | 2021-01-12 |
Family
ID=66857894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980037103.6A Pending CN112219251A (en) | 2018-06-12 | 2019-06-11 | On-load tap changer and method for operating an on-load tap changer |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3807916B1 (en) |
| CN (1) | CN112219251A (en) |
| AU (1) | AU2019286437A1 (en) |
| DE (1) | DE102018113982B4 (en) |
| WO (1) | WO2019238669A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020128463A1 (en) * | 2020-10-29 | 2022-05-05 | Maschinenfabrik Reinhausen Gmbh | LOAD CONTROLLER AND METHOD OF OPERATING A LOAD CONTROLLER |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2604344A1 (en) * | 1976-02-05 | 1977-08-18 | Reinhausen Maschf Scheubeck | STEPPED TRANSFORMER WITH OVERVOLTAGE PROTECTION DEVICE |
| DE4223439C1 (en) * | 1992-07-16 | 1994-03-17 | Reinhausen Maschf Scheubeck | Load selector for tap changers on tap transformers |
| DE59302207D1 (en) * | 1992-07-16 | 1996-05-15 | Reinhausen Maschf Scheubeck | STEP SWITCH |
| DE4439813C1 (en) * | 1994-11-08 | 1996-06-20 | Reinhausen Maschf Scheubeck | Tap changer and method for monitoring it |
| DE19743864C1 (en) * | 1997-10-04 | 1999-04-15 | Reinhausen Maschf Scheubeck | Tap changer |
| CN102077305B (en) * | 2008-08-27 | 2012-09-12 | 赖茵豪森机械制造公司 | Tap switch with semiconductor switching elements |
| DE102012107080B3 (en) * | 2012-08-02 | 2013-10-10 | Maschinenfabrik Reinhausen Gmbh | step switch |
| DE102013110652B4 (en) * | 2013-09-26 | 2018-02-22 | Maschinenfabrik Reinhausen Gmbh | Switch arrangement with selection |
| EP3086343B1 (en) * | 2015-04-21 | 2018-11-14 | Ormazabal Corporate Technology, A.I.E. | On-load tap changer device |
| DE102015106178A1 (en) * | 2015-04-22 | 2016-10-27 | Maschinenfabrik Reinhausen Gmbh | OLTC |
-
2018
- 2018-06-12 DE DE102018113982.9A patent/DE102018113982B4/en active Active
-
2019
- 2019-06-11 EP EP19730320.9A patent/EP3807916B1/en active Active
- 2019-06-11 WO PCT/EP2019/065200 patent/WO2019238669A1/en unknown
- 2019-06-11 CN CN201980037103.6A patent/CN112219251A/en active Pending
- 2019-06-11 AU AU2019286437A patent/AU2019286437A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018113982A1 (en) | 2019-12-12 |
| WO2019238669A1 (en) | 2019-12-19 |
| EP3807916C0 (en) | 2023-08-09 |
| AU2019286437A1 (en) | 2021-01-28 |
| EP3807916A1 (en) | 2021-04-21 |
| DE102018113982B4 (en) | 2023-09-28 |
| EP3807916B1 (en) | 2023-08-09 |
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