EP3089186B1 - Elektrisches schaltgerät sowie verfahren zum betreiben einer elektrischen schaltanlage - Google Patents

Elektrisches schaltgerät sowie verfahren zum betreiben einer elektrischen schaltanlage Download PDF

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Publication number
EP3089186B1
EP3089186B1 EP15165985.1A EP15165985A EP3089186B1 EP 3089186 B1 EP3089186 B1 EP 3089186B1 EP 15165985 A EP15165985 A EP 15165985A EP 3089186 B1 EP3089186 B1 EP 3089186B1
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EP
European Patent Office
Prior art keywords
drive mechanism
switchgear
locking
unit
locking bolt
Prior art date
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EP15165985.1A
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English (en)
French (fr)
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EP3089186A1 (de
Inventor
Fabio BALDO
Vincenzo Girlando
Frank Nienrodt
Lutz Dr. Ing. Drews
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General Electric Technology GmbH
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General Electric Technology GmbH
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Priority to EP15165985.1A priority Critical patent/EP3089186B1/de
Priority to CN201610265107.8A priority patent/CN106409556A/zh
Publication of EP3089186A1 publication Critical patent/EP3089186A1/de
Application granted granted Critical
Publication of EP3089186B1 publication Critical patent/EP3089186B1/de
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/04—Interlocking mechanisms
    • H01H31/10—Interlocking mechanisms for interlocking two or more switches
    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches

Definitions

  • the invention relates to an electrical switchgear comprising at least one power switch and a grounding switch associated with said power switch for electrically grounding said power switch.
  • the invention further relates to a method of operating such electrical switchgear.
  • An electrical switchgear of the aforementioned type is known from EP 1 786 010 B1 .
  • DE 199 00219 A1 discloses a locking unit comprising a plurality of elements which are movably attached to each other.
  • Document US 4 644 113 A discloses an electric safety device for sequentially controlling a power switch and a grounding switch of a high voltage electric device, comprising a motor for driving a threaded shaft, which drives a movable threaded sleeve to rotate sequentially a pair of rotary members each including a wheel having a recess on its periphery, said periphery actuating the power respectively the grounding switch, a rod axially extending from a center of the wheel and disposed perpendicularly to said threaded shaft, and a radial guide piece clamped to said rod to be engaged by said sleeve.
  • said object is achieved by the feature combination of claim 1. This offers an increased degree of operational flexibility and reliability and helps to avoid undesired combinations of operational states of the power switch(es) and the associated grounding switch(es), which may even lead to destruction of the switchgear.
  • said interlocking unit is configured to selectively lock either said first drive mechanism or said second drive mechanism.
  • At least one locking element which is a locking bolt, is provided for locking said first drive mechanism and/or said second drive mechanism.
  • one or more locking bolts may be employed that have a basically circular cylindrical shape.
  • a drive unit is provided to move said at least one locking bolt, wherein said drive unit comprises at least one electromechanical actuator, particularly at least one of a stepper motor, a series-characteristic motor, wherein optionally a reduction gear may be provided.
  • said drive unit comprises at least one electromechanical actuator, particularly at least one of a stepper motor, a series-characteristic motor, wherein optionally a reduction gear may be provided.
  • said drive unit is configured to axially move said locking bolt between a first axial end position and a second axial end position, wherein preferably a maximum stroke between said first and second axial end positions ranges from about 20 millimeters to about 200 millimeters.
  • a control unit for controlling an operation of said interlocking unit, wherein preferably said control unit is arranged at and/or within a housing of said interlocking unit, and wherein preferably said control unit comprises an interface configured to exchange control information and/or data with a further device.
  • This advantageously further supports remote operation of the interlocking unit but also offers the possibility of executing monitoring and/or control functions directly locally in the interlocking unit.
  • a thermal control unit is provided within a housing of said interlocking unit, wherein said thermal control unit is configured to influence an internal temperature and/or an internal humidity within said housing.
  • one or more sensors are provided for detecting an operational state of the switchgear and/or of the interlocking unit.
  • said second drive mechanism comprises a shaft, preferably a hollow shaft, and a locking disc which is arranged on said shaft in a torque proof manner, wherein said locking disc comprises at least one opening configured to receive an axial end section of said locking bolt.
  • a manual drive mechanism e.g., a crank handle that may be used to drive a shaft of a motor of the drive unit
  • a crank handle that may be used to drive a shaft of a motor of the drive unit
  • Figure 1a schematically depicts a front view of an electrical switchgear 10 according to an embodiment.
  • the switchgear 10 is configured as three-phase switchgear having three power switches 11 only one of which is denoted with a reference sign.
  • the switchgear 10 also comprises three grounding switches 12 each of which is associated with a respective power switch 11 for electrically grounding said power switch 11.
  • the embodiments are not limited to switchgear having three electrical phases. Rather, the inventive principle may also be applied to single-phase switchgear, i.e. having a single power switch 11 and an associated grounding switch 12, or to systems having two phases or more than three phases. Nevertheless, for the further explanations, reference will be made to the three-phase switchgear 10 exemplarily depicted by Fig. 1a .
  • the switchgear 10 comprises a supporting frame 13 on which said power switches 11 and their associated grounding switches 12 are arranged, said supporting frame 13 having two racks 14 for attachment to a supporting surface (not shown), i.e. a ground surface or a foundation.
  • all power switch poles represented by the respective power switches 11 may have the same configuration and may e.g. be configured as per se known high-voltage power switches or high-voltage power switches with disconnecting functionality (particularly according to IEC 62271-108), which may also be referred to as "disconnecting circuit breaker" (DCB).
  • the power switches 11 may also be configured as high-voltage load break switches.
  • each of said power switch poles comprises a basically cylindrical shape and is arranged on a top surface of supporting frame 13.
  • each of the three power switches 11 comprises a first terminal 16, which may be displaced relative to the top surface of supporting frame 13 by means of an insulator 18 (insulator 18 may also be denoted as support insulator), and a second terminal 17 arranged at a vertical top section of the power switch pole represented by power switch 11. Between terminals 16, 17, a further insulator 18 may be provided, which may e.g. comprise a switching chamber. Generally, one or more components of the power switch 11 may be arranged in said insulator(s) 18 in a per se known manner.
  • Each of the power switches 11 is equipped with a respective grounding switch 12.
  • the grounding switches 12 may be connected to electrical ground e.g. by means of the supporting frame 13 and the racks 14. It is also possible that at least some components, particularly movable components, of said grounding switches 12 are electrically connected to the frame 13 and/or the racks 14 by means of flexible grounding cables or sliding contacts.
  • all three grounding switches 12 may comprise a basically identical configuration with pivotable contact arms 21, also cf. the dashed quadrant lines 22 indicating a path of movement from the surface of the supporting frame 13 to the first terminal 16 of the first power switch 11.
  • the contact arm 21 In a first operational state of the grounding switch 12, the "switched-on” state, the contact arm 21 is in a vertically upright position, in electrical contact with the first terminal 16 of the switch 11 thus grounding said switch 11. In a second operational state, the "switched-off” state, the contact arm 21 is in a horizontal position, i.e. basically in parallel with a longitudinal axis of the supporting frame 13, thus not grounding said switch 11. Further details of the grounding switches are provided in EP 1 786 010 B1 , cf. e.g. paragraphs [0019] to [0031].
  • a first drive mechanism 110 is provided at the supporting frame 13, said first drive mechanism 110 being configured to drive said power switch 11 in a per se known manner.
  • the first drive mechanism 110 may comprise a spring drive mechanism enabling storage of mechanical energy for driving or moving, respectively, one or more components of the switch 11 to effect a change of said switch 11 from a first operational state to a second operational state and vice versa.
  • the drive mechanism 110 may comprise a spring drive mechanism, for example of the "FK3" type series of Alstom Grid.
  • a second drive mechanism 120 is provided for driving said grounding switch 12, particularly the movement of the pivotable contact arm(s) 21 as already explained above.
  • both drive mechanisms 110, 120 may comprise one or more movable shafts and/or hollow shafts and/or levers and/or rod linkages and the like to establish a functional chain for transferring movement energy or "switching energy" from an energy source such as a spring energy store and/or a motor drive and/or a manual drive or the like to at least one movable component of the power switch 11 and the grounding switch 12.
  • an energy source such as a spring energy store and/or a motor drive and/or a manual drive or the like to at least one movable component of the power switch 11 and the grounding switch 12.
  • an interlocking unit 200 is provided, which is configured to lock said first drive mechanism 110 and/or said second drive mechanism 120 thus advantageously enabling to control or even prevent changes in the operational states of the power switch(es) 11 and the grounding switch(es) 12.
  • the interlocking unit 200 is arranged at or within the supporting frame 13, preferably close to the drive mechanisms 110, 120.
  • Fig. 1b schematically depicts a side view of said switchgear 10 according to Fig. 1a .
  • the interlocking unit 200 is arranged between the drive mechanisms 110, 120.
  • Fig. 2 schematically depicts a block diagram of the interlocking unit 200 according to an embodiment.
  • at least one locking bolt is provided for locking said first drive mechanism 110 and/or said second drive mechanism 120.
  • two locking bolts 202', 202" are provided, which, according to a further embodiment, may e.g. be individually moved by a drive unit 210 of said interlocking unit 200.
  • a control unit 220 is provided for control of said drive unit 210 and thus for controlling the operational states of the locking bolts 202', 202''.
  • the control unit 220 may comprise a calculating unit (not shown) such as e.g. a microcontroller and/or microprocessor and/or digital signal processor (DSP) and/or an application specific integrated circuit (ASIC) and/or a field programmable gate array (FPGA) or the like.
  • DSP microcontroller and/or microprocessor and/or digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • said control unit 220 is arranged at and/or within a housing (not shown in Fig. 2 ) of said interlocking unit 200, wherein preferably said control unit 220 comprises an interface 222 configured to exchange control information 222a and/or data 222a with a further device, e.g. an external control device (not shown) for controlling operation of said switchgear ( Fig. 1a ).
  • a further device e.g. an external control device (not shown) for controlling operation of said switchgear ( Fig. 1a ).
  • the first locking bolt 202' may be moved by said interlocking unit 200 or its drive unit 210, respectively, at least between two different operational states, wherein in a first operational state, the first locking bolt 202' does not lock the drive mechanism 110 for the switch 11 ( Fig. 1a ) thus not preventing the switch 11 from altering its operational state, and wherein in a second operational state, the first locking bolt 202' does lock the drive mechanism 110 for the switch 11 thus preventing the switch 11 from altering its operational state.
  • the second locking bolt 202" may also be moved by said interlocking unit 200 or its drive unit 210, respectively, at least between two different operational states, wherein in a first operational state, the second locking bolt 202" does not lock the drive mechanism 120 for the grounding switch 12 ( Fig. 1a ) thus not preventing the grounding switch 12 from altering its operational state, and wherein in a second operational state, the second locking bolt 202" does lock the drive mechanism 120 for the grounding switch 12 thus preventing the grounding switch 12 from altering its operational state.
  • Locking a drive mechanism 110, 120 may e.g. be affected by moving a locking bolt into a position where movement of at least one movable component of the drive mechanism 110, 120 to be locked may be prevented, e.g. by means of form closure of the locking bolt with said at least one movable component, also cf. the embodiments explained below with reference to Fig. 3 , 4 , for example.
  • the drive unit 210 of the interlocking unit 200 may be configured such that individually driving either said first locking bolt 202' and/or said second locking bolt 202" is possible. I.e., in this case, the first and second locking bolts 202', 202" may be driven by the interlocking unit 200 independently from each other.
  • a drive unit 210 is provided to move said at least one locking bolt 202', 202", wherein said drive unit 210 comprises at least one electromechanical actuator, particularly at least one of a stepper motor, a series-characteristic motor, wherein optionally a reduction gear may be provided.
  • two motor drives may be provided which may be controlled by control unit to selectively move the locking bolts 202', 202" thus individually locking the switches 11 and/or 12.
  • switchgear 10 ( Fig. 1a ) having more than one electrical phase
  • all power switches 11 may be controlled by the first drive unit 110 collectively.
  • all grounding switches 12 may be controlled by the second drive unit 120 collectively.
  • it may be sufficient to configure the locking bolts 201', 202" such that each locking bolt 202', 202" may lock a component of the respective drive unit 110, 120 which collectively drives further components of the drive units 110, 120 that may be provided for distributing the driving force of the respective unit 110, 120 to individual ones of said switches 11 and grounding switches 12.
  • said locking unit 200 may be arranged and configured to centrally exert its locking effect to the respective driving mechanism.
  • the interlocking unit 200 is configured to selectively lock either said first drive mechanism 110 or said second drive mechanism 120, preferably independently of each other.
  • the interlocking unit 200 is configured to selectively lock either said first drive mechanism 110 or said second drive mechanism 120 in a mutually exclusive fashion. I.e., while locking the first drive unit 110, the interlocking unit 200 may not simultaneously lock the second drive unit 120, and vice versa.
  • the interlocking unit 200 is configured such that exactly one of said drive units 110, 120 is locked at a time, and the other one is not locked.
  • the first drive unit 110 may be locked, and the second drive unit 120 cannot be locked simultaneously by the interlocking unit 200.
  • the second drive unit 120 is locked, and the first drive unit 110 cannot be locked simultaneously by the interlocking unit 200.
  • Figure 3 schematically depicts a perspective view of an interlocking unit 200 according to an embodiment.
  • the interlocking unit 200 is arranged between components 112, 112a of the first drive mechanism 110 ( Fig. 1b ), which is for driving the power switch 11 as explained above, and components 122, 124 of the second drive mechanism 120 which is for driving the grounding switch 12 as explained above.
  • element 112 is a rotatable (cf. double arrow 112a) hollow shaft 112 to which a lever 113 is attached for driving a rod linkage (not shown in Fig. 3 , also cf. 113a of Fig. 6 ) that effects movement of movable components of the power switches 11 of Fig. 1a .
  • the hollow shaft 112 may e.g. be connected to a driving shaft (not shown) of a spring force drive (not shown) or any other type of drive, which may e.g. be included in the first drive mechanism 110 ( Fig. 1b ).
  • the present rotational position of the hollow shaft 112 and the lever 113 which is arranged on said hollow shaft 112 in a torque proof manner exemplarily corresponds to an "open state" of the switches 11.
  • the lever 113 and the hollow shaft 112 form part of the same monolithic component, which may e.g. be obtained by forging.
  • Element 122 is a rotatable (cf. double arrow 122a) shaft 122, preferably a hollow shaft, to which a locking disc 124 is attached in a torque proof manner.
  • Said locking disc 124 comprises at least one opening 126 configured to receive an axial end section 202b of a locking bolt 202 the main body of which is covered by the housing 204 of the interlocking unit 202 in Fig. 3 .
  • the housing 204 is arranged on a ground plate 206 which also carries two bearings 208a, 208b having respective openings for opposing axial end sections 202a (cf. Fig. 4a ), 202b for the locking bolt 202 which is movable therein in an axially slideable fashion as indicated by the double block arrow of Fig. 3 .
  • a portion of the bearing 208a which comprises an opening for guiding the first axial end section 202a of the locking bolt 202 is denoted with reference sign 208a'.
  • At least one of said bearings 208a, 208b may be arranged at a further component of said switchgear 10, preferably arranged at the supporting frame 13 ( Fig. 1a ).
  • the embodiment explained below with reference to Fig. 6 depicts a bearing 208a being arranged at the supporting frame 13.
  • Reference sign 222a' denotes a communication cable which serves to exchange control information 222a ( Fig. 2 ) and/or data 222a between control unit 220 and a further device, e.g. an external control device (not shown), for controlling operation of said switchgear 10 ( Fig. 1a ) and/or said interlocking unit 200.
  • Fig. 4a, 4b , 4c schematically depict a perspective view of an interlocking unit 200, preferably the unit 200 as explained above with reference to Fig. 3 , in different operational states.
  • FIG. 4a the housing 204 ( Fig. 3 ) of the interlocking unit 200 is not depicted by Fig. 4a , so that the main body of the locking bolt 202 is visible.
  • the first axial end portion 202a of the - presently single - locking bolt 202 is in a position where it does not lock or prevent the movement of the lever 113 and thus of hollow shaft 112.
  • the lever 113 may e.g. rotate in the direction of arrow a1 when driven by the hollow shaft 112, e.g. for moving the switch 11 from its "open state” to a "closed state", cf. Fig. 4c .
  • the second axial end portion 202b of said locking bolt 202 is arranged within opening 126 of the locking disc 124 establishing a form closure between bolt 202 and the locking disc 124 thus preventing rotational movement of hollow shaft 122.
  • This is indicated by a dashed double arrow 122a within Fig. 3 .
  • the grounding switch 12 Fig. 1a
  • its drive unit 120 respectively, is locked by the interlocking unit 200, because locking bolt 202 prevents movement of the hollow shaft 122, which may be provided to drive the pivotable contact arms 21 ( Fig. 1a ) of the grounding switches 12.
  • the power switch 11 is not locked, but the grounding switch 12 is locked. More specifically, the power switch 11 is not locked, and currently is in the "open state", and the grounding switch 12 is locked in its "open state”.
  • the locking bolt 202 may comprise a double bolt portion 202a' the purpose of which will be explained below with reference to Fig. 4c .
  • Figure 4b depicts the interlocking unit 200 of Fig. 4a in a further operational state.
  • the locking bolt 202 is placed such that its first axial end section 202a locks movement of the lever 113 in direction of the dashed arrow a1', however, since its second axial end portion 202b is not arranged within the opening 126 of the locking disc 124 anymore, the locking bolt 202 does not effect locking of the hollow shaft 122 of the grounding switch drive unit 120 anymore.
  • the interlocking unit 200 may have moved the locking bolt 202 in Fig. 4a to the left thus obtaining the scenario according to Fig. 4b .
  • the second drive mechanism 120 may have turned the hollow shaft 122 to its rotational state depicted by Fig. 4b after the locking state of the second drive mechanism 120 has been left.
  • the power switch 11 is locked, but the grounding switch 12 is not locked any more. More specifically, the power switch 11 is locked in its "open state", and the grounding switch 12 is not locked and currently has assumed its "closed state”. To close the power switch 11, first the grounding switch 12 must be opened so that the locking bolt 202 may be shifted to the right into the opening 126. Only then the currently depicted locking of the power switch 11 in its open state may be released.
  • Figure 4c depicts the interlocking unit 200 of Fig. 4a, 4b in a further operational state, which is similar to the state depicted by Fig. 4a in that the locking bolt 202 is positioned within its right axial end position. Consequently, as with Fig. 4a , the hollow shaft 122 of the second drive mechanism 120 is locked again, and the hollow shaft of the first drive mechanism 110 is not locked.
  • the power switch 11 is not locked, but the grounding switch 12 is locked. More specifically, the power switch 11 is not locked and has assumed its "closed state", and the grounding switch 12 is locked and currently has assumed its "open state”. Additionally, due to the double bolt portion 202a', the locking bolt 202 is prevented from being moved to its left axial end portion due to form closure with lever 113, whereby it is prevented that the currently applied locking of the grounding switch 12 in its open state is released, while the power switch 11 is in its closed state.
  • a drive unit 210 ( Fig. 2 ) is provided to move said at least one locking bolt 202, 202', 202'', wherein said drive unit 210 comprises at least one electromechanical actuator, particularly at least one of a stepper motor, a series-characteristic motor, wherein optionally a reduction gear may be provided.
  • Fig. 5 schematically depicts a perspective view of a drive unit 210 according to an embodiment, wherein the locking bolt 202 is similar to the one explained above with reference to Fig. 4a to 4c .
  • a stepper motor 212 is provided for moving said locking bolt 202, which is effected by a toothed wheel 213 being applied to a shaft of the stepper motor 212, said toothed wheel 213 working together with a toothed rack section 202c applied to the locking bolt 202.
  • one or more sensors are provided for detecting an operational state of the switchgear 10 and/or of the interlocking unit 200 or its drive unit 210, respectively.
  • Fig. 5 depicts micro switch 215, which is configured to detect a proximity of the double bolt portion 202a' ( Fig. 4c ) in relation to the micro switch 215.
  • a signal of the micro switch 215 may e.g. be employed to indicate whether the locking bolt 202 has assumed its right axial position.
  • more than one micro switch 215 may be provided, e.g. for indicating a "left" axial end position of the locking bolt 202 or the like.
  • a linear position transducer (not shown) may be provided to determine an exact position of the locking bolt 202.
  • the data provided by the sensor(s) 215 may be evaluated by the control unit 220 and/or may be forwarded to an external unit.
  • an operation of the interlocking unit 200 and/or the switchgear and/or the drive unit 210 may be performed depending on said sensor data.
  • a thermal control unit 214 may be provided within a housing 204 ( Fig. 3 ) of said interlocking unit 200, wherein said thermal control unit 214 is configured to influence an internal temperature and/or an internal humidity within said housing 204.
  • the thermal control unit 214 may comprise a PTC (positive temperature coefficient) element to control an internal temperature of the interlocking unit 200 in a per se known manner to avoid humidity and thus increase an operational flexibility (extended operating temperature/humidity ranges) and reliability.
  • Fig. 6 schematically depicts a perspective view of an interlocking unit 200a according to a further embodiment. Depicted is the hollow shaft 112 of the first drive mechanism 110 , the lever 113 and a rod linkage 113a which effects movement of movable components of the power switches 11 by conveying kinetic energy from the first drive mechanism 110 or its energy source (e.g., spring energy store) to the switches 11.
  • the first drive mechanism 110 or its energy source e.g., spring energy store
  • the locking bolt 202 of Fig. 6 does not comprise a double bolt portion 202a'.
  • the locking bolt 202 may comprise different axial sections with different outer diameters, as shown by Fig. 6 .
  • Fig. 7 schematically depicts a perspective view of a drive unit of the interlocking unit 200a according to Fig. 6 .
  • An electric motor 212 preferably of the series-characteristic type, is provided together with a reduction gear 2120 attached to a first shaft portion (not shown) of the motor 212.
  • a second shaft portion 2122 of the motor which is part of the same shaft driving the reduction gear 2120, extends through a housing of the motor and is accessible for applying a driving torque, e.g. manually, e.g. by means of a crank handle (not shown), whereby the motor 212 and thus the drive unit may also be manually driven, for example in emergency situations.
  • a control electronic for driving the motor 212 is arranged in the housing 2140 which is directly attached to the motor housing.
  • the control electronic for driving the motor 212 may e.g. be controlled by the control unit 220 ( Fig. 2 ), preferably depending under control of an external device or a local control panel arranged close to the unit 200 or the switchgear 10.
  • gear lever 2124 An output shaft of the reduction gear is coupled to gear lever 2124 at its radially inner section 2124a to effect rotational movement a2 of the gear lever 2124.
  • gear lever 2124 may be connected to the locking bolt 202.
  • the gear lever 2124 may comprise an oblong hole which may be engaged by a driving bolt (not shown) fixedly arranged at the locking bolt 202.
  • Fig. 8 schematically depicts a coordinate axis x according to an embodiment, which illustrates the axial movement of the locking bolt 202 according to the embodiments of Fig. 3 to Fig. 7 as explained above.
  • a first or "left" axial end position of the locking bolt 202 is denoted with a first coordinate position x0.
  • This first axial end position x0 e.g. corresponds with the scenario of Fig. 4b , also cf. the block arrow of Fig. 8 .
  • a second or "right" axial end position of the locking bolt 202 is denoted with a coordinate position x3 > x0.
  • This second axial end position x3 e.g. corresponds with the scenario of Fig. 4a , also cf. the dashed block arrow of Fig. 8 .
  • a range (x0, x1) with x1 > x0 indicates a first region along the axis x in which - if an end portion 202a of the locking bolt 202 is present within said first range - already a locking of the first drive mechanism 110 will be effected. I.e., if the first axial end section 202a of the locking bolt enters the first range (x0, x1), a locking effect will occur.
  • a range (x2, x3) with x2 > x0, x2 ⁇ x3 indicates a second region along the axis x in which - if an end portion 202b of the locking bolt 202 is present within said second range - already a locking of the second drive mechanism 120 will be effected. I.e., if the second axial end section 202a of the locking bolt 202 enters the second range (x2, x3), a locking effect will occur.
  • L1 > L2 the locking bolt 202 in any case locks at least one drive mechanism 110, 120.
  • L1 is chosen to be larger than L2.
  • L1 may also be chosen to be smaller than L2, whereby an "intermediate" position of said locking bolt 202 may be assumed in which the locking bolt 202 is not placed within any of the first and second ranges. In this state, neither the power switch 11 nor the grounding switch is locked (mechanically).
  • the locking bolt length L1 may be chosen such that it exceeds L2. Thereby it is guaranteed that for many possible positions of the locking bolt 202 both switches 11, 12 are locked, and that in no case, both switches 11, 12 are simultaneously not locked. This e.g. ensures that the grounding switch 12 can never be closed when the power switch 11 is currently closed. Likewise, it will be impossible to close the power switch 11 if the grounding switch 12 is closed.
  • additional manual locking means such as a padlock (not shown) may be provided to secure the locking bolt 202 or any component of the drive mechanisms 110, 120 in a predetermined position.
  • Fig. 9 schematically depicts a simplified flow-chart of a method according to the embodiments.
  • the control unit 220 receives a command from an external device, e.g. a computer of a remote operator, to control an operation of the interlocking unit 200.
  • Such command may e.g. comprise an instruction to ensure that the grounding switch 12 is locked in its open state, cf. e.g. Fig. 4a .
  • the control unit 220 may check sensor data (e.g., from micro switch 215, cf. Fig.
  • control unit 220 may control drive unit 210 to drive the motor 212 for moving the locking bolt 202 in a position which ensures locking of the grounding switch 12 in its open state.
  • the locking bolt 202 may comprise a plurality of axial sections having different outer diameters, cf. Fig. 6 , wherein a first axial end section 202a comprises an outer diameter ranging between 20 millimeters and 40 millimeters, wherein said outer diameter more preferably equals about 35 millimeters.
  • a second axial end section 202b comprises an outer diameter ranging between 15 millimeters and 30 millimeters, wherein said outer diameter more preferably equals about 25 millimeters.
  • the locking bolt 202 may be made of steel or stainless steel.
  • the locking bolt 202 may comprise a plurality of axial sections 202a, 202b which are tiltably and/or rotatably connected to each other, for example by means of a hinge 2020, cf. Fig. 6 .
  • the two axial sections 202a, 202b are connected by a hinge 2020 having a hinge bolt 2022 that enables a tilt movement of said two axial sections 202a, 202b around a tilt axis defined by said hinge bolt 2022 thus enabling to compensate mechanical tolerances of the compontents 200, 110, 112, 113, 120, 122, 124 and their arrangement relative to each other (e.g., deviations in (angular) alignment, and the like).
  • the locking bolt 202 may comprise an annular groove 2024 which may e.g. serve to receive mechanical locking means such as a shackle of a padlock (not shown), whereby the locking bolt 202 may be locked in place, e.g. to ensure that no movement of said locking bolt 202 is possible thus also preventing a change of an operational state of the interlocking unit 200.
  • a padlock may be placed with its shackle around the annular groove 202, whereby upon axial movement of said locking bolt 202 the padlock may be driven against a side surface of the bearing 208b ( Fig. 3 ) and/or a housing of the second drive mechanism 120 ( Fig. 1a ) thus effecting a form closure-type of locking the locking bolt 202 against further axial movement.
  • a further locking element 2026 may be provided, which is arranged at a component of the first drive mechanism 110 ( Fig. 1a ).
  • said further locking element 2026 may be attached to a rod linkage 113a which is driven by the lever 113, and may comprise a bent sheet material element.
  • Said further locking element 2026 may be arranged at the rod linkage 113a such that - preferably depending on an axial position of the rod linkage 113a - it prevents an axial movement of the locking bolt 202 in the direction of its first axial end section 202a (i.e., to the left in Fig. 6 ).
  • the locking bolt 202 can be locked by said further locking element 2026 thus preventing a movement of the locking bolt 202 to its first axial end position x0 (cf. Fig. 8 ), if the rod linkage 113a and thus also the first drive mechanism 110 as a whole comprises a first operational state, which is depicted by Fig. 6 , and which e.g. corresponds to a "closed state" of the switch 11, also cf. Fig. 4c .
  • the further locking element 2026 does not prevent an axial movement of the locking bolt 202 in the direction of its first axial end section 202a anymore.
  • the further blocking element 2026 comprises a functionality similar to the one of the embodiment with the double bolt portion 202a', cf. Fig. 4c .
  • the principle according to the embodiments advantageously enables to efficiently, and particularly also to remotely, control an operational state of the interlocking unit 200, whereby an increased operational flexibility and reliability is attained while at the same time offering more safety for technicians and staff operating said switchgear.
  • the use of sensor elements and/or switches to determined information on an operational state of the interlocking unit further increases operational flexibility and reliability and security for the staff.
  • an analysis of the motor driving current for the motor 212 ( Fig. 5 , 7 ) of the drive unit 210 may be employed to derive information on a position of the locking element.
  • visually recognizable position indicating means may also be provided at the interlocking unit 200 or a remote unit being in data connection with said interlocking unit 200, said position indicating means indicating a current operational state of the interlocking unit and/or of a locking element.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (13)

  1. Elektrisches Schaltwerk (10), umfassend mindestens einen Leistungsschalter (11) und einen Erdungsschalter (12), der mit dem Leistungsschalter (11) zum elektrischen Erden des Leistungsschalters (11) verbunden ist, wobei ein erster Antriebsmechanismus (110) zum Antreiben des Leistungsschalters (11) bereitgestellt ist und wobei ein zweiter Antriebsmechanismus (120) zum Antreiben des Erdungsschalters (12) bereitgestellt ist, und wobei eine Verriegelungseinheit (200) bereitgestellt ist, die ausgebildet ist, den ersten Antriebsmechanismus (110) und/oder den zweiten Antriebsmechanismus (120) zu verriegeln, wobei mindestens ein Verriegelungselement, das ein Verriegelungsbolzen (202; 202', 202") ist, zum Verriegeln des ersten Antriebsmechanismus (110) und/oder des zweiten Antriebsmechanismus (120) bereitgestellt ist und wobei eine Antriebseinheit (210) bereitgestellt ist, um den mindestens einen Verriegelungsbolzen (202; 202', 202") zu bewegen,
    dadurch gekennzeichnet, dass
    die Antriebseinheit (210) mindestens ein elektromechanisches Stellglied umfasst, wobei eine Steuereinheit (220) zum Steuern eines Betriebs der Verriegelungseinheit (200) bereitgestellt ist, wobei der erste Antriebsmechanismus (110) eine drehbare Welle umfasst, an der ein Hebel (113) befestigt ist, um eine Lenkstange anzutreiben, um eine Bewegung beweglicher Komponenten des mindestens einen Leistungsschalters (11) zu bewirken, und wobei der zweite Antriebsmechanismus (120) eine Welle (122) und eine Verriegelungsscheibe (124), die an der Welle (122) drehfest angeordnet ist, umfasst, wobei die Verriegelungsscheibe (124) mindestens eine Öffnung (126) umfasst, die ausgebildet ist, eine axiale Endsektion (202b) des Verriegelungsbolzens (202) aufzunehmen.
  2. Schaltwerk (10) nach Anspruch 1, wobei die Verriegelungseinheit (200) ausgebildet ist, selektiv entweder den ersten Antriebsmechanismus (110) oder den zweiten Antriebsmechanismus (120) zu verriegeln.
  3. Schaltwerk (10) nach Anspruch 1, wobei die Antriebseinheit (210) ausgebildet ist, den Verriegelungsbolzen (202) axial zwischen einer ersten axialen Endposition und einer zweiten axialen Endposition zu bewegen, wobei vorzugsweise ein maximaler Hub zwischen der ersten und zweiten axialen Endposition von etwa 20 Millimeter bis etwa 200 Millimeter reicht.
  4. Schaltwerk (10) nach einem der vorstehenden Ansprüche, wobei eine thermische Steuereinheit (214) in einem Gehäuse (204) der Verriegelungseinheit (200) bereitgestellt ist, wobei die thermische Steuereinheit (214) ausgebildet ist, eine Innentemperatur und/oder eine Innenfeuchtigkeit in dem Gehäuse (204) zu beeinflussen.
  5. Schaltwerk (10) nach einem der vorstehenden Ansprüche, wobei ein oder mehrere Sensoren (215) zum Erfassen eines Betriebszustands des Schaltwerks (10) und/oder der Verriegelungseinheit (200) bereitgestellt sind.
  6. Schaltwerk (10) nach einem der Ansprüche 1 bis 5, wobei die Welle (122) des zweiten Antriebsmechanismus (120) eine hohle Welle ist und/oder wobei die Welle (112) des ersten Antriebsmechanismus (110) eine hohle Welle ist.
  7. Schaltwerk (10) nach einem der vorstehenden Ansprüche, wobei ein Motor (212) bereitgestellt ist, der mit einem Untersetzungsgetriebe (2120) verbunden ist, und wobei ein Schalthebel (2124) an eine Ausgangswelle des Untersetzungsgetriebes gekoppelt ist.
  8. Schaltwerk (10) nach einem der vorstehenden Ansprüche, wobei ein manueller Antriebsmechanismus bereitgestellt ist, der eine manuelle Beeinflussung eines Betriebszustands der Verriegelungseinheit (200) ermöglicht.
  9. Schaltwerk (10) nach einem der Ansprüche 1 bis 8, wobei der Verriegelungsbolzen (202) eine Vielzahl von axialen Endsektionen (202a, 202b) mit unterschiedlichen Außendurchmessern umfasst, wobei vorzugsweise eine erste axiale Endsektion (202a) einen ersten Außendurchmesser im Bereich von etwa 20 Millimeter bis etwa 40 Millimeter umfasst, wobei der erste Außendurchmesser bevorzugter gleich etwa 35 Millimeter ist, wobei vorzugsweise eine zweite axiale Endsektion (202b) einen zweiten Außendurchmesser umfasst, der im Bereich von etwa 15 Millimeter bis etwa 30 Millimeter liegt, wobei der zweite Außendurchmesser bevorzugter gleich etwa 25 Millimeter ist.
  10. Schaltwerk (10) nach einem der Ansprüche 1 bis 9, wobei der Verriegelungsbolzen (202) eine Vielzahl axialer Sektionen (202a, 202b) umfasst, die kippbar und/oder drehbar miteinander verbunden sind.
  11. Schaltwerk (10) nach einem der vorstehenden Ansprüche, wobei das elektromechanische Stellglied mindestens eines von einem Schrittmotor (212), einem reihencharakteristischen Motor (212), ist, wobei optional ein Untersetzungsgetriebe (2120) bereitgestellt sein kann.
  12. Schaltwerk (10) nach einem der vorstehenden Ansprüche, wobei die Steuereinheit (220) bei und/oder in einem Gehäuse (204) der Verriegelungseinheit (200) angeordnet ist und wobei die Steuereinheit (220) vorzugsweise eine Schnittstelle (222) umfasst, die ausgebildet ist, Steuerinformationen (222a) und/oder Daten (222a) mit einer weiteren Vorrichtung auszutauschen.
  13. Verfahren zum Betreiben eines elektrischen Schaltwerks (10), umfassend mindestens einen Leistungsschalter (11) und einen Erdungsschalter (12), der mit dem Leistungsschalter (11) zum elektrischen Erden des Leistungsschalters (11) verbunden ist, wobei ein erster Antriebsmechanismus (110) zum Antreiben des Leistungsschalters (11) bereitgestellt ist und wobei ein zweiter Antriebsmechanismus (120) zum Antreiben des Erdungsschalters (12) bereitgestellt ist, und wobei eine Verriegelungseinheit (200) bereitgestellt ist, die den ersten Antriebsmechanismus (110) und/oder den zweiten Antriebsmechanismus (120) verriegelt, wobei mindestens ein Verriegelungselement, das ein Verriegelungsbolzen (202; 202', 202") ist, zum Verriegeln des ersten Antriebsmechanismus (110) und/oder des zweiten Antriebsmechanismus (120) bereitgestellt ist und wobei eine Antriebseinheit (210) bereitgestellt ist, die den mindestens einen Verriegelungsbolzen (202; 202', 202") bewegt,
    dadurch gekennzeichnet, dass
    die Antriebseinheit (210) mindestens ein elektromechanisches Stellglied umfasst, wobei eine Steuereinheit (220) zum Steuern eines Betriebs der Verriegelungseinheit (200) bereitgestellt ist, wobei der erste Antriebsmechanismus (110) eine drehbare Welle umfasst, an der ein Hebel (113) befestigt ist, um eine Lenkstange anzutreiben, um eine Bewegung beweglicher Komponenten des mindestens einen Leistungsschalters (11) zu bewirken, und wobei der zweite Antriebsmechanismus (120) eine Welle (122) und eine Verriegelungsscheibe (124), die an der Welle (122) drehfest angeordnet ist, umfasst, wobei die Verriegelungsscheibe (124) mindestens eine Öffnung (126) umfasst, die ausgebildet ist, eine axiale Endsektion (202b) des Verriegelungsbolzens (202) aufzunehmen.
EP15165985.1A 2015-04-30 2015-04-30 Elektrisches schaltgerät sowie verfahren zum betreiben einer elektrischen schaltanlage Active EP3089186B1 (de)

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EP15165985.1A EP3089186B1 (de) 2015-04-30 2015-04-30 Elektrisches schaltgerät sowie verfahren zum betreiben einer elektrischen schaltanlage
CN201610265107.8A CN106409556A (zh) 2015-04-30 2016-04-26 电气开关齿轮和操作电气开关齿轮的方法

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EP3432413B1 (de) * 2017-07-21 2019-09-04 Spinner GmbH Drehschalter für verbindung mit niedriger passiver intermodulation
EP3582348A1 (de) * 2018-06-13 2019-12-18 ABB Schweiz AG Multifunktionale integrierte hochspannungsschaltanlage mit digitalen steuerungsfunktionalitäten
CN110661338A (zh) * 2019-09-20 2020-01-07 华为技术有限公司 一种配电系统及其控制方法
DE112021006958A5 (de) * 2021-04-08 2023-11-23 Siemens Aktiengesellschaft Vorrichtung zum Verriegeln eines elektrischen Schalters und elektrischer Schalter mit solch einer Vorrichtung

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US4644113A (en) * 1985-10-09 1987-02-17 Huang L D Electric safety device
FR2640077B1 (fr) * 1988-12-02 1991-01-11 Alsthom Gec Boitier fonctionnel de verrouillage pour installation a moyenne tension
DE19900219B4 (de) * 1999-01-07 2006-07-20 Fritz Driescher KG Spezialfabrik für Elektrizitätswerksbedarf GmbH & Co Verriegelungsvorrichtung
DE102005054842B4 (de) 2005-11-15 2014-09-18 Alstom Grid Gmbh Elektrische Schaltanlage
CN101556878B (zh) * 2009-05-25 2012-05-02 华仪电气股份有限公司 高压真空负荷开关及熔断器组合电器的操作机构
KR101036989B1 (ko) * 2009-12-23 2011-05-26 엘에스산전 주식회사 진공 차단기의 접지 스위치 연동 장치
FR2989217B1 (fr) * 2012-04-10 2014-03-28 Schneider Electric Ind Sas Dispositif de commande pour un appareil de protection electrique moyenne tension comportant un dispositif d'inter verrouillage et appareil de protection electrique le comportant

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