EP2436021A1 - Switching unit for a circuit breaker having a toggle lever - Google Patents
Switching unit for a circuit breaker having a toggle leverInfo
- Publication number
- EP2436021A1 EP2436021A1 EP10723995A EP10723995A EP2436021A1 EP 2436021 A1 EP2436021 A1 EP 2436021A1 EP 10723995 A EP10723995 A EP 10723995A EP 10723995 A EP10723995 A EP 10723995A EP 2436021 A1 EP2436021 A1 EP 2436021A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocker arm
- switching unit
- spindle
- circuit breaker
- slider
- 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
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/048—Means for indicating condition of the switching device containing non-mechanical switch position sensor, e.g. HALL sensor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position
Definitions
- the invention relates to the field of automation of manually operated by means of rocker arms circuit breakers.
- the invention relates to a switching unit for actuating a rocker arm of a circuit breaker according to the preamble of claim 1 and a method for operating a switching unit for actuating a rocker arm according to the preamble of claim 9.
- STATE OF THE ART DE-A-102 44 231 apparently exemplifies such a switching unit.
- This known device makes it possible to remotely operate mechanical, manually operated circuit breaker by means of a switching unit from a remote control center. For this purpose, this known device on a driven claw for actuating a toggle switch of the circuit breaker. The disadvantage of this known device that correct operation of the circuit breaker is not guaranteed if the claw is not moved away from the rocker arm.
- the object of the invention is to provide a device of the type mentioned, which ensures a reliable Fun technischmaschinen a circuit breaker.
- this object is achieved by a device having the features of claim 1, by a device having the features of claim 10 and by a method having the features of claim 11.
- the switching unit for actuating a rocker arm of a circuit breaker on a drive unit, which at least, a linearly by a distance having movable, driven first element.
- the drive unit has a second element, which is freely movable with respect to the first element by a free travel. Through this free travel can be ensured that the freedom of movement of the rocker arm is not limited by the switching unit. This can ensure that the rocker arm of the circuit breaker can move freely, thereby escalategestel lt that the fun Ktion instruct the circuit breaker is not affected.
- the method for operating a switching unit for actuating a rocker arm of a circuit breaker comprising a driven, linearly movable first element and a second element cooperating with the first element, which is movable along a distance by means of the first element, wherein by means of the second element the rocker arm can be moved from the "off" position to the "on” position during a movement of the second element in the switch-on direction and from the "on” position to the "off” position during a movement of the second element in the switch-off direction of the rocker arm, the following Procedural steps on
- This inventive method for operating a switching unit allows in a particularly simple manner, the automation of a developed for manual operation circuit breaker. Consequently, the circuit breaker can be operated by means of the inventive method from a control center.
- this has a driven spindle, a cooperating with the spindle spindle nut, which is displaceable by rotation of the spindle along this spindle, and a cooperating with the spindle nut slide, which is movable by means of the spindle nut along the spindle the slider is designed to actuate the rocker arm, and wherein the slider is displaceable relative to the spindle nut by the free travel.
- This embodiment of the drive unit is a special simple design of the drive unit, which has a free travel, possible. Characterized in that there is a rotational movement on the drive side with respect to the spindle nut, a favorable motor can be used, which requires a relatively low energy to operate.
- the drive unit can be blocked. This can ensure that, for example, during maintenance of the rocker arm of the circuit breaker can not be operated by the switching unit. This serves in particular for the protection of the person carrying out the maintenance work.
- FIG. 1 in view a circuit breaker with a mounted on it
- FIG. 2 is a partial view of the in FIG. 1 illustrated switching unit and the
- FIG. 3 the partial view according to FIG. 2, with the rocker arm in its "off” position and the slider also shown in its "off” position;
- FIG. 4 the partial view according to FIG. 2, wherein the rocker arm and the slider are shown during the switch-on; 5 shows the partial view according to FIG. 2, the toggle lever being in its "on"position;
- FIG. 6 shows the partial view according to FIG. 2, the toggle lever being shown in its “on” position and the slider likewise in its "on” position;
- FIG. 7 shows the partial view according to FIG. 2, wherein the rocker arm in its "trip"
- Position is shown; Dotted is the position of the rocker arm and the slider shown in FIG.6;
- FIG. 8 shows the partial view according to FIG. 2, the toggle lever being in its "off” position and the slider being in its extreme position in FIG
- Locking device for blocking a spindle shows.
- a circuit breaker 10 is shown, such as a circuit breaker.
- the circuit breaker 10 has a rocker arm 12, by means of which the electrical switching contacts of the circuit breaker 10 can be opened or disconnected.
- Such circuit breakers 10 are typically used for voltages up to 1200V and currents up to 0.5A. If an inadmissible operating condition is applied to the circuit breaker, for example, if too high a voltage or too high current is applied, the circuit breaker opens the electrical switching contacts automatically.
- the rocker arm 12 of the circuit breaker 10 has three stable switching positions, one in the FIG.
- the "trip" position can be dispensed with, with such circuit breakers it being not possible to detect whether the electrical contacts were opened manually or due to an impermissible operating condition.
- the present invention can be used for circuit breakers with "trip” position as well as for circuit breaker without "Trip” position can be used.
- a spring is typically tensioned.
- the stored energy in the spring is used in particular for opening the electrical switch contacts in the event of a fault.
- a switching unit 20 is placed for automatically actuating the rocker arm 12 of the circuit breaker 10.
- the rocker arm 12 designed for manual actuation can be actuated automatically via the switching unit 20.
- the switching unit 20 is supplied on the one hand with its own power supply and connected via a data line with a control center or the like.
- the switching unit 20 has a support structure 22, which is formed by two clamping arms 24 and a bridge 26 connecting these clamping arms 24.
- the support structure 22 has at the clamping arms 24 cams (not shown in the figures), which engages in recesses formed on the housing of the circuit breaker 10.
- the support structure 22 can also be attached non-positively to the housing of the circuit breaker 10.
- Other mounting options, such as by gluing are also conceivable.
- a drive unit 31 which converts a rotational movement into a linear movement, wherein the linear movement takes place along a stretch S.
- the drive unit 31 has a first ele- ment 32 ', which is movable by the distance S. Further, according to the invention, the drive unit 32 has a second element 34 ', which is freely movable with respect to the first element 32' by a free travel L.
- the first element 32 ' is formed by a driven spindle nut 32 and the second element 34' by a slider 34, wherein the slider 34 is freely displaceable relative to the spindle nut 32 by the free travel L.
- the free travel L has, for example, a minimum length of 1 mm, preferably of 3 mm and most preferably of 5 mm.
- a maximum length of the free travel L has, for example, a length of 40 mm, preferably 30 mm and particularly preferably 15 mm.
- the switching unit 20 makes it possible to prevent the function of the circuit breaker 10 from being impaired, in particular that the intended function of the rocker arm 12 is not hindered by the switching unit 20 becomes.
- a driven spindle 30 of the drive unit 31 of the switching unit 20 is rotatably supported on the support structure 22 .
- An axial direction X of the spindle 30 extends at right angles to the axis of rotation D of the rocker arm 12 of the circuit breaker 10.
- the axial direction X of the spindle 30 extends at least approximately in the direction of a circular movement path of the rocker arm 12 approximated linear direction of movement of the rocker arm 12 and thus in the direction of the track S.
- the spindle nut 32 is mounted on the spindle 30 and guided by the support structure 22 such that by rotating the spindle 30 about its own axis, the spindle nut 32 in the axial direction X of the spindle 30 and thus by the distance S is movable. Consequently, the drive unit 31 converts by means of the driven spindle 30 and the spindle nut 32 a rotational movement in a linear movement.
- the switching unit 20 to the drive unit 31 belonging to slider 34 which is movable in the axial direction X of the spindle 30 and is guided by the support structure 22.
- the slider 34 engages around the spindle 30 in the circumferential direction of the spindle 30.
- the slider 34 has a first counter-abutment surface 36 and a second counter-abutment surface 38, which interact with stop surfaces 40 formed on the end face of the spindle nut 32 for a second time Move in the axial direction X.
- the first counter-abutment surface 36 is spaced from the second counter-abutment surface 38 by a distance in the axial direction X, which is greater than the distance of the stop surfaces 40 of the spindle nut 32 by the distance of the first counter-abutment surface 36 to the second counter-abutment surface 38, which is greater than the distance Stop surfaces 40 to each other, is formed on the drive unit 31 of the Leerweg L.
- the slider 34 is adapted to actuate the rocker arm 12 of the circuit breaker 10.
- the slider 12 has two drivers 42, 44, wherein the first driver 42 is intended to actuate the rocker arm 12 in the switching-on direction E, and the second driver 44 is intended to actuate the rocker arm 12 in the disconnecting direction A.
- the switch-on direction E is defined by the switch-on movement of the rocker arm 12 from its “off” position in the direction of the "on” position.
- the switching-off direction A is defined by the switch-off movement of the rocker arm from its "on” position in the direction of the "off” position.
- the first driver 42 and the second driver 44 are integral components of a claw 46, which is intended to engage around the rocker arm 12.
- the spindle 30 is driven by a motor 50.
- the rotational movement of the motor 50 is converted via the spindle 30 and the spindle nut 32 in a linear movement in the axial direction X.
- the motor 50 is controlled by a control logic 52 of the circuit breaker 10.
- the switching unit 20 In order to detect the "trip" position of the circuit breaker by the switching unit 20, the switching unit 20 has a button 54. If the slider 34 is brought by the rocker arm 12 in its position corresponding to the "trip” position, the button 54 is closed, whereby a signal is outputted to the control logic 52 until the slider 34 leaves the position corresponding to the "trip” position. Likewise, with each movement of the slider 34, the key 54 gives from the position corresponding to the "off" position of the slider 34 in d The position corresponding to the position of the slider 34 sends a signal to the control logic 52, because the button 54 is momentarily closed or opened, and a signal is also sent to the control logic if the slider 34 is moved in the opposite direction ,
- the support structure 22 and the elements held thereon are at least partially enclosed in a housing 60 of the switching unit 20.
- the housing 60 has a viewing window 62 through which the position of the slider 34 in the axial direction X of the spindle 30 is displayed.
- the slider 34 has an indicator needle 64.
- a maximum possible movement distance of the slider 34 in the axial direction X of the spindle 30 is selected to be greater than an actuating distance of the rocker arm 12 from the "on" position to the "off” position of a certain type of circuit breaker. This allows the switching unit 20 to be mounted on different types of protective switches.
- locking device 70 for the spindle 30 is arranged on the housing 60 in FIG. 1 and 9 .
- this locking device 70 By means of this locking device 70, the operation of the circuit breaker 10 via the switching unit 20 can be mechanically prevented. This is especially important for maintenance on a circuit protected by the circuit breaker.
- the locking device 70 is formed by a locking slide 72 held on the housing 60 and having two locking surfaces 74 (see Fig. 9) which cooperate to lock the spindle 30 therewith.
- the locking slide 72 is displaceable in a direction R perpendicular to the axial direction X of the spindle 30 from an unlocking position to a locking position back and forth. In the locking position of the locking slide 72 can be locked in position for example by means of a U-lock.
- a screw intended for mounting the switching unit 20 on the circuit breaker 10 for example a screw for fixing the switching unit 20 to the circuit breaker 10, can be arranged such that in the locking position of the blocking slide 72 the armature is not accessible for mounting or dismounting the switching unit 20 or of the circuit breaker 10th
- the spindle 30 has at its end remote from the motor 50 end portion 75 a square shape.
- the two locking surfaces 74 are arranged on two projections 76 formed on the locking slide 72.
- the locking slide 72 has a device which rotates the spindle 30 - if necessary - such that the locking surfaces 74th are aligned parallel to two side surfaces of the square-shaped end portion 75.
- a surface 78 for aligning the spindle is provided at each of the projections 76 on that side, which faces the spindle 30 in the unlocked position of the locking slide 72.
- the surface 78 offset from each other, that is not opposite each other, arranged. This prevents the spindle 30 from jamming when inserted into the locking device 70.
- the circuit breaker 10 is operated as follows.
- the switching unit 20 Before the switching unit 20 can reliably actuate the rocker arm 12 without affecting the operation of the circuit breaker 10, the switching unit 20 is calibrated to the respective circuit breaker 10.
- the slider 34 is moved from its initial position in the switch-on direction E to that position due to the rotation of the motor 50, the rotation of the spindle 30 coupled with the rotation of the motor 50, and the spindle nut 32 linearly moved by the rotation of the spindle 30 which the first driver 42 contacts the rocker arm 12 (see FIG.3).
- This position is detected by monitoring a load current of the motor 30 driving the spindle 30.
- the load current jumps in.
- This position of the slider, in which the first driver 42 is applied to the rocker arm 12 in its "off” position is referred to as "off" position of the slider 34.
- the "off" position of the slider 34 is approached twice in the switching-on direction E, in order to refer to this position.
- the slider 34 is moved in the turn-off direction A.
- the slider 34 is preferably moved until the second driver 44 of the slider 34 engages the rocker arm 12 in its "on” position (see Fig. 6) .
- This position of the slider 34 is again detectable by measuring the load current the slider 34 in which the second cam 44 abuts on the rocker arm 12 in the "on” position is referred to as the "on" position of the slider 34.
- the "off" position and the "on” position of the slider 34 are stored in the control logic 52 as absolute positions by counting Hall sensor signals to each other, so that these positions can be approached directly. Furthermore, by measuring the load current, the two extreme positions in the switch-on direction E and switch-off direction A can also be determined and stored. Thereby, it can be prevented that the motor 50 unintentionally moves into a mechanical stop and thereby becomes overloaded.
- the switch unit 20 After the calibration of the switch unit 20 placed on the circuit breaker 10, the switch unit 20 operates as follows.
- the switching unit 20 receives a turn-on signal from the control center, the slider 34 is moved over the extreme position in the turn-on direction E to the "on" position (see FIGS.3 to 6)
- Control center receives the slide 34 is moved over the extremal position in the turn-off direction A in the "off” position (see Figures 6, 8 and 3).
- the system of circuit breaker 10 and switching unit 20 is immediately ready to execute a further switching command from the control center.
- the rocker arm 12 must be able to pivot freely from the "on" position to the "trip” position in the event of a fault (see FIG and 7) This is necessary because interference with the free movement of the rocker arm 12 would not ensure trouble-free operation of the circuit breaker 10. In particular, the circuit breaker 10 and / or the electrical equipment to be protected could be damaged and / or destroyed.
- FIG. 7 is represented by the free travel L (shown in FIG.2) of the slider 34 relative to
- the free travel L is dimensioned such that upon movement of the rocker arm 12 from the “on” position to the “trip” position, the spindle nut 32 does not come into abutment against the first counter-abutment surface 36 Otherwise, the fault-free operation of the circuit breaker 10 would not be guaranteed
- the rocker arm has no "trip” position, ie if the rocker arm 12 pivots directly from the "on” position to the "off” position in the event of a fault
- the free travel L is dimensioned such that upon movement of the rocker arm 12 from the "on” position to the "off” position The slipping nut 32 does not come into contact with the first counter-abutment surface 36, otherwise the fault-free operation of the circuit breaker 10 would not be ensured.
- the second element 34 ' which is formed in the embodiment by the slider 34, is actuated by the rocker arm 12 in Indiafal l.
- the second element 34 ' is shifted in Ausschaltetraum A by the Actuallyfallwegrange F.
- the free travel L is at least the same size chosen as the fault path F. In particular, the free travel L chosen larger be as the fault path F.
- the "trip" position of the slider 34, and thus of the rocker arm 12, is detected by means of the stylus 54 (see FIGURE 1)
- the stylus 54 is positioned in the axial direction X of the spindle 34 so that the stylus 54 will provide a continuous signal if it is not Slider 34 is in the "Trip” position.
- the signal of the button 54 is forwarded by the control logic 52 to a remote control center for controlling the switching unit 20.
- control logic 52 is designed so that only a limited number of turn-on operations are performed in a certain period of time.
- the drive unit of the switching unit has a linear motor. This linear motor will be used instead of that disclosed in connection with the first embodiment
- Element of the linear motor forms an equivalent to the spindle nut element, which w ith w ith the Sch i ebe r to s wi m to wi rt. Otherwise, there are two
- Embodiment equivalent to the first embodiment is formed and is also operated equivalently to the first embodiment.
Landscapes
- Breakers (AREA)
- Push-Button Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10723995.6A EP2436021B1 (en) | 2009-05-25 | 2010-05-25 | Switching unit for a circuit breaker with flip switch |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09161024 | 2009-05-25 | ||
PCT/EP2010/057145 WO2010136446A1 (en) | 2009-05-25 | 2010-05-25 | Switching unit for a circuit breaker having a toggle lever |
EP10723995.6A EP2436021B1 (en) | 2009-05-25 | 2010-05-25 | Switching unit for a circuit breaker with flip switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2436021A1 true EP2436021A1 (en) | 2012-04-04 |
EP2436021B1 EP2436021B1 (en) | 2016-01-06 |
Family
ID=41228737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10723995.6A Active EP2436021B1 (en) | 2009-05-25 | 2010-05-25 | Switching unit for a circuit breaker with flip switch |
Country Status (4)
Country | Link |
---|---|
US (1) | US8525057B2 (en) |
EP (1) | EP2436021B1 (en) |
CN (1) | CN102804321B (en) |
WO (1) | WO2010136446A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITBG20110034A1 (en) * | 2011-08-01 | 2013-02-02 | Abb Spa | CONTROL DEVICE FOR THE RECOVERY OF A SWITCH IN LOW VOLTAGE. |
DE102012201552A1 (en) * | 2012-02-02 | 2013-08-08 | Siemens Aktiengesellschaft | Electric switch |
DE102015201667B4 (en) * | 2015-01-30 | 2023-02-02 | Siemens Aktiengesellschaft | Remote operator for a circuit breaker and device for operating a circuit breaker |
DE102015214827A1 (en) * | 2015-08-04 | 2017-02-09 | Siemens Aktiengesellschaft | Device for actuating a handle and electrical switch |
CN105895463B (en) * | 2016-05-17 | 2018-06-15 | 乐清市尔安电气科技有限公司 | A kind of control device of breaker |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3591747A (en) * | 1969-12-29 | 1971-07-06 | Arrow Hart Inc | Lever operated switch with tiltable contact actuator and flexible contacts |
JPS6412335U (en) | 1987-07-13 | 1989-01-23 | ||
US5808532A (en) * | 1996-01-24 | 1998-09-15 | Circuit Protection & Controls, Inc. | Motorized module for field assembly to circuit breakers |
US5693923A (en) * | 1996-04-15 | 1997-12-02 | Eaton Corporation | Motor operator for electrical switches |
US5905239A (en) * | 1996-08-19 | 1999-05-18 | Eaton Corporation | Motor operator with burn-out protection |
JPH11120887A (en) * | 1997-10-09 | 1999-04-30 | Fuji Electric Co Ltd | Door interlock device for switching device board |
US6091038A (en) * | 1999-05-27 | 2000-07-18 | Trw Inc. | Electrical switch with sliding terminal contacts |
DE10244237A1 (en) | 2002-09-23 | 2004-03-25 | Altmeyer, Hans J. | Flame cutting arrangement used in the steel industry for cutting long pig iron strands into shorter lengths for further processing comprises a bay which travels over cutting material storage units |
CN2886794Y (en) * | 2005-12-31 | 2007-04-04 | 叶进福 | Direct push type manual and auto switching off device for leakage breaker |
WO2009093644A1 (en) * | 2008-01-22 | 2009-07-30 | Fujikura Ltd. | Slide switch |
-
2010
- 2010-05-25 CN CN201080033842.7A patent/CN102804321B/en active Active
- 2010-05-25 WO PCT/EP2010/057145 patent/WO2010136446A1/en active Application Filing
- 2010-05-25 EP EP10723995.6A patent/EP2436021B1/en active Active
-
2011
- 2011-11-25 US US13/304,482 patent/US8525057B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010136446A1 * |
Also Published As
Publication number | Publication date |
---|---|
US8525057B2 (en) | 2013-09-03 |
EP2436021B1 (en) | 2016-01-06 |
CN102804321A (en) | 2012-11-28 |
CN102804321B (en) | 2015-11-25 |
WO2010136446A1 (en) | 2010-12-02 |
US20120125750A1 (en) | 2012-05-24 |
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