EP1508196A1 - Motorantrieb - Google Patents
MotorantriebInfo
- Publication number
- EP1508196A1 EP1508196A1 EP03755038A EP03755038A EP1508196A1 EP 1508196 A1 EP1508196 A1 EP 1508196A1 EP 03755038 A EP03755038 A EP 03755038A EP 03755038 A EP03755038 A EP 03755038A EP 1508196 A1 EP1508196 A1 EP 1508196A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- motor
- switch
- motor drive
- switches
- 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.)
- Granted
Links
Classifications
-
- 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
Definitions
- the invention relates to a motor drive for tap changers, diverters and plunger core coils according to the preamble of the first claim.
- a motor drive is known from WO 98/38661.
- the motor drive mentioned at the beginning is used to set the tap changer, the diverter or the plunger coil to the desired operating position; in it all mechanical and electrical assemblies, which are necessary for the drive, are united.
- the principal structure of such a motor drive is known from the applicant's company publication BA 47/91 de “Motorantriebe”.
- Important mechanical assemblies are the load gear and the control gear.
- the load gear actuates the tap changer or the like directly; it has a correspondingly dimensioned electric motor
- the control gear contains a cam disk which rotates one full revolution each time the tap changer or the like is switched over, ie actuation of the motor drive.
- This cam disk contains switching cams for actuating a wide variety of cam switches, which in turn are part of the electrical switches to be explained
- the control gear also contains means for displaying the step position or the switching step during the changeover.
- the electrical assemblies in the motor drive consist of a wide variety of circuits; this includes the motor circuit, in which the terminals of the drive motor are connected to the power supply line via brake contactors, motor contactors and other switching means. This also includes the control circuit and various signaling circuits and tripping circuits for motor protection switches.
- the motor drive is controlled according to the principle of step switching, i.e. H. an adjustment process by one switching step is initiated by a single control pulse and then inevitably - practically unstoppable - brought to an end.
- the output shaft of the motor drive which, actuated by its drive motor, is coupled to the drive shaft of the tap changer or the like, performs a precisely defined number of revolutions.
- the running time of this stepping circuit is determined by a control cam of the control gear with exactly one revolution per stage.
- IEC 60214 The necessary basic functions of the motor drive described are specified in IEC 60214.
- this IEC also requires a flow protection device that prevents the motor drive from running uncontrolled into its end position in the event of a fault.
- a failure of the stepping of the motor drive can be defective due to a "sticky" motor contactor Cam switch, a defective contactor coil or also due to excessive overrun of the drive motor.
- the required run-through protection device must reliably trigger the motor protection switch and thus stop the motor drive in order to prevent it from undesirably going through to the end position.
- a further run-through protection device is known from WO 98/38661, also mentioned at the beginning, in which there are two additional control cams in the control gear, which correspond to additional cam-controlled monitoring contacts and monitor the operating states of the contactors during the running time.
- one of the additional monitoring contacts checks at the beginning of the respective switching process whether one of the motor contactors is activated and the step contactor is not actuated.
- the other of the two monitoring contacts checks in the middle of the respective switching process whether the stepping contactor is then actuated. If this is not the case, the trigger coil of the motor protection switch is actuated and the motor drive is stopped.
- the object of the invention is to provide a motor drive of the type mentioned at the outset which does not have the disadvantages of the prior art described and which enables reliable continuous protection with technically simple and inexpensive means, the individual components being intended to be self-monitoring, ie also internal faults in the continuous protection device should be recorded.
- both cam switches are directional, i. H. irrespective of the direction of rotation of the output shaft of the motor drive, this enables actuation to be carried out inexpensively and without high mechanical outlay.
- the arrangement of the two cam switches is intrinsically safe, i. H. If one of the two switches gets stuck or stuck in the fault, the motor protection switch is actuated in the course of this switching. Furthermore, due to the selected actuation sequence and thus the check periods provided during the switchover, the check takes place outside the preselector circuit on the tap changer.
- a particular problem with a motor drive with a runaway protection is represented by so-called Pass positions in the motor drive which, due to the respective design of the tap changer to be operated or the like, are simply passed automatically without an additional impulse.
- a position indicator installed in the motor drive.
- Such a position indicator is such. B. from WO 98/53276. It consists of a position indicator board, a position indicator module and a connection cable.
- the position signaling module is used to simulate a changeover contact that changes its switching position in a continuous position, that is, when a position is automatically passed over.
- This changer is used to apply voltage to the coil of the respective motor contactor so that it remains energized beyond the end of the position.
- Fig. 1 is a circuit diagram of the two cam switches for the flow protection device according to the prior art
- Fig. 2 is a circuit diagram of the two cam switches in a first motor drive according to the invention
- Fig. 3 shows a section of the control circuit of this motor drive
- Fig. 4 shows the complete flow protection device within the control circuit of this motor drive
- Fig. 5 shows a control circuit in a second motor drive according to the invention.
- one of the two cam switches S1 checks at the beginning of the switching between switching step units 2 and 3 whether one of the motor contactors K1, K2 is activated and the step contactor K20 is not actuated.
- the second cam switch S2 checks in the middle of the circuit in the 17th switching step whether the step contactor K20 is now actuated; if this is not the case, the tripping coil of the motor protection switch is actuated. It is obvious that, at least for cam switch S1, a direction-dependent switching behavior that is difficult to implement is necessary to check the switching states at the beginning of the switching, as has already been mentioned above.
- the two switching points or time ranges between the switching step units 3 ... 4 and 29 ... 30, in which the two cam switches S1 and S2 are not actuated in an overlapping manner, can be evaluated by a corresponding circuit and, according to the invention, can be used as bridging times for the flow protection device.
- cam switches S1, S2 are actuated by 3 ... 29 switching step units and 4 ... 30 switching step units, depending on the direction of rotation; they are interconnected so that depending on the direction of rotation at the two intermediate terminals 12, 13 there is a pulse of 3 ... 4 and 29 ... 30 switching step units.
- both cam switches are actuated in any direction. It can also be seen that both switches are intrinsically safe, i. H. If one of the two cam switches S1 or S2 hangs or sticks, the motor protection switch is actuated during the switching process. The fact that the two monitoring periods are at the beginning and the end of the entire switchover ensures that the switching states are checked outside the actuation of a preselector connected, for example, to the tap changer.
- FIG. 5 shows a second motor drive according to the invention, which contains an additional cam switch S37, which is designed as a break contact, which can be actuated over the entire position range.
- an additional cam switch S37 which is designed as a break contact, which can be actuated over the entire position range.
- the positions of the motor drive which, as explained above, are to be passed over
- triggers are provided which briefly actuate the additional cam switch S37.
- This additional cam switch S37 causes the step contactor K20 to drop out shortly before the end of the switching.
- All checks of the flow protection device with cam contacts S1 and S2 have already been completed.
- the electrical latching of the motor contactors is reactivated and the motor drive makes another circuit.
- This S37 cam switch is also intrinsically safe. H.
- the continuous contact S37: C-NC the actual latching circuit
- the step contactor only lasts over K37: 21-24 and K20: 53-54.
- the flow protection contacts S1 and S2 drop out and the relay for the automatic position run K37 drops out.
- the contact K37: 21-24 opens and interrupts the latching of the step contactor K20.
- the contacts K20: 21-22 or K20: 31-32 fall back and reactivate the electrical latching of the motor contactors K1: 73-74, K2: 73-74.
- the circuit is not finished with the relapse of the mechanical self-holding contacts for the respective direction S12, S14, rather a further circuit is initiated.
Landscapes
- Motor And Converter Starters (AREA)
- Control Of Stepping Motors (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Mechanisms For Operating Contacts (AREA)
- Valve Device For Special Equipments (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10222941A DE10222941C1 (de) | 2002-05-24 | 2002-05-24 | Motorantrieb |
| DE10222941 | 2002-05-24 | ||
| PCT/EP2003/002579 WO2003100961A1 (de) | 2002-05-24 | 2003-03-13 | Motorantrieb |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1508196A1 true EP1508196A1 (de) | 2005-02-23 |
| EP1508196B1 EP1508196B1 (de) | 2005-10-12 |
Family
ID=28685344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03755038A Expired - Lifetime EP1508196B1 (de) | 2002-05-24 | 2003-03-13 | Motorantrieb |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1508196B1 (de) |
| AT (1) | ATE306744T1 (de) |
| AU (1) | AU2003209731A1 (de) |
| DE (2) | DE10222941C1 (de) |
| WO (1) | WO2003100961A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2947769A1 (de) * | 1979-11-27 | 1981-07-23 | Transformatoren Union Ag, 7000 Stuttgart | Steuereinrichtung fuer motorantriebe von stufenschaltern |
| DE4214431C3 (de) * | 1992-04-30 | 1996-08-14 | Reinhausen Maschf Scheubeck | Stufenschalter mit Motorantrieb |
| DE19707548C1 (de) * | 1997-02-26 | 1998-06-18 | Reinhausen Maschf Scheubeck | Motorantrieb |
| DE19720617C2 (de) * | 1997-05-16 | 1999-03-18 | Reinhausen Maschf Scheubeck | Stellungsmeldeanordnung für Motorantriebe |
| DE19755758C1 (de) * | 1997-12-16 | 1999-05-06 | Reinhausen Maschf Scheubeck | Schaltanordnung für Motorantriebe |
| SE519492C2 (sv) * | 2000-05-26 | 2003-03-04 | Abb Ab | Manöverdon samt lindningskopplare innefattande ett sådant |
-
2002
- 2002-05-24 DE DE10222941A patent/DE10222941C1/de not_active Expired - Fee Related
-
2003
- 2003-03-13 DE DE50301374T patent/DE50301374D1/de not_active Expired - Fee Related
- 2003-03-13 EP EP03755038A patent/EP1508196B1/de not_active Expired - Lifetime
- 2003-03-13 AT AT03755038T patent/ATE306744T1/de not_active IP Right Cessation
- 2003-03-13 AU AU2003209731A patent/AU2003209731A1/en not_active Abandoned
- 2003-03-13 WO PCT/EP2003/002579 patent/WO2003100961A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03100961A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003209731A1 (en) | 2003-12-12 |
| EP1508196B1 (de) | 2005-10-12 |
| DE10222941C1 (de) | 2003-10-30 |
| DE50301374D1 (de) | 2005-11-17 |
| ATE306744T1 (de) | 2005-10-15 |
| WO2003100961A1 (de) | 2003-12-04 |
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