EP2509091B1 - Auxiliary device of circuit breaker - Google Patents

Auxiliary device of circuit breaker Download PDF

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Publication number
EP2509091B1
EP2509091B1 EP10834376.5A EP10834376A EP2509091B1 EP 2509091 B1 EP2509091 B1 EP 2509091B1 EP 10834376 A EP10834376 A EP 10834376A EP 2509091 B1 EP2509091 B1 EP 2509091B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
closing contact
early closing
external operating
operating handle
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.)
Not-in-force
Application number
EP10834376.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2509091A1 (en
EP2509091A4 (en
Inventor
Yoshinobu Hamada
Koji Asakawa
Yutaka Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric FA Components and Systems Co Ltd
Original Assignee
Fuji Electric FA Components and Systems Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Electric FA Components and Systems Co Ltd filed Critical Fuji Electric FA Components and Systems Co Ltd
Publication of EP2509091A1 publication Critical patent/EP2509091A1/en
Publication of EP2509091A4 publication Critical patent/EP2509091A4/en
Application granted granted Critical
Publication of EP2509091B1 publication Critical patent/EP2509091B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • H01H2071/565—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel using a add on unit, e.g. a separate rotary actuator unit, mounted on lever actuated circuit breakers
    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/46—Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts

Definitions

  • This invention relates to an auxiliary device for a circuit breaker, targeting circuit breakers for wiring applied to low-voltage power distribution equipment and earth leakage circuit breakers, and more specifically relates to the configuration of an undervoltage tripping device and an external operating handle device which are mounted on a circuit breaker and used as auxiliary devices of the circuit breaker.
  • auxiliary devices are prepared as options for the circuit breaker of the title; one such device is an undervoltage tripping device.
  • This undervoltage tripping device trips the circuit breaker when the voltage of a circuit for protection (voltage of the main circuit or control circuit) falls below a voltage stipulated in advance (for example, in the range 35 to 85% of a rated voltage), thereby shutting off the main circuit.
  • a voltage stipulated in advance for example, in the range 35 to 85% of a rated voltage
  • internal type undervoltage tripping devices are known which are inserted into and set inside the case of a circuit breaker for use (see for example Patent Reference 1).
  • Such an internal type undervoltage tripping device is provided with a tripping mechanism that is mounted on a cassette case within the case of the circuit breaker, and is constituted by an assembly of an electromagnet, an actuator joined to the armature of the electromagnet so as to be opposed to a tripping crossbar of the circuit breaker, an armature release spring, and a reset lever linked to the armature.
  • the reset lever of the undervoltage tripping device linked thereto returns the actuator to the retracted position in opposition to the release spring. In this state, if the main circuit voltage has returned to the stipulated range, the electromagnet attracts and holds the armature, and the actuator is held in the retracted position, so that reclosing of the circuit breaker is established.
  • an undervoltage tripping device with an early closing contact which combines the above-described tripping mechanism with an early closing contact switch, in which this early closing contact switch is connected to the power supply circuit of the electromagnet coil, is also known (see for example Patent Reference 2).
  • This undervoltage tripping device with an early closing contact performs circuit breaker closing safely and accurately, and so in the above-described configuration which combines an early closing contact switch mechanism with a tripping mechanism including an electromagnet, in a state of use in which this device is mounted on a circuit breaker, the early closing contact switch mechanism is linked to a driving lever (cam type lever) or similar provided on the handle of the circuit breaker.
  • the handle of the circuit breaker which is halted in the TRIP position, is returned once to the OFF position and then moved toward the ON position, the early closing contact is closed before closing of the main circuit contact of the circuit breaker, and the electromagnetic coil is excited by a current.
  • the armature of the electromagnet of the tripping mechanism is attracted and held, and the actuator is held in the retracted position, so that when the handle is moved to the ON position, reclosing of the circuit breaker is established.
  • the electromagnet armature is not attracted, so that even when the handle is moved to the ON position, the circuit breaker is not reset, and returns to the tripped state.
  • An undervoltage tripping device with an early closing contact is large in size compared with the internal type undervoltage tripping device disclosed in Patent Reference 1, and without further modification, incorporation within the case of a circuit breaker would be difficult; hence normally a unit case is external mounted on a side face of the circuit breaker case, as in Patent Reference 2, and is linked via a driving lever onto a driving handle, which is a rotary handle of the circuit breaker onto which the early closing contact switch mechanism is mounted.
  • circuit breakers for wiring, earth leakage circuit breakers
  • auxiliary devices externally operated handle devices which perform operations to open and close the circuit breaker from the front of the panel door are used.
  • a design is known in which a rocker handle of the circuit breaker is driven to the ON, OFF and RESET positions by operation of the rotary handle mounted on an external operating handle device (see for example Patent Reference 3).
  • Figs. 8(a) to 8(c) 1 is a circuit breaker (wiring circuit breaker), and 2 is an external operating handle device, mounted on the case of the circuit breaker as an auxiliary device of the circuit breaker 1.
  • the circuit breaker 1 is configured comprising, installed in a case 1a, an open/close mechanism 1b, movable contact point 1c, open/close mechanism 1d comprising a reversal operation type toggling mechanism, rocker handle 1e disposed on the top of the case 1a and linked to the open/close mechanism 1d, and overcurrent tripping device 1f, and similar.
  • 5a is a nameplate displaying the positions ON, OFF, TRIP, RESET of the handle 4.
  • the open/close operation of the above circuit breaker 1 is well known; when the rocker handle 1e is switched by moving from the ON position as shown to the right and downward to the OFF position, in the midst of this stroke the open/close mechanism 1d performs a reversal operation, receiving the biasing force of the open/close spring of the open/close mechanism 1d to open the movable contact point 1c. Further, when a main circuit overcurrent is detected and the overcurrent tripping device 1f operates, the open/close mechanism 1d performs a release operation, the movable contact point 1c is opened, and the main circuit current is cut off. Through this tripping operation, the rocker handle 1e moves to a position intermediate between the ON position and the OFF position, and displays the trip operation state.
  • the external operating handle device 2 comprises, mounted on a base 3 fixed in place by fastening with screws to the top of the case 1a of the circuit breaker 1, a rotary handle 4, handle cover 5, sliding base 6 and other driving components; a turning base 4b linked to a support shaft 4a of the handle 4 comprises a crank pin 4c.
  • the sliding base 6 is slidably guided and supported in a direction parallel to the rocker handle 1e of the circuit breaker 1, and a long hole 6a directed perpendicular to the sliding direction is opened in the plate face thereof; the crank pin 4c is mated with this long hole 6a and linked with the rotary handle 4.
  • the sliding base 6 comprises a pusher 6b which opposes, from the ON side, the knob of the rocker handle 1e protruding from the case 1a of the circuit breaker 1, and a biasing spring 6c which presses the pusher 6b from behind toward the knob of the handle 1e.
  • the handle 4 of the external operating handle device 2 linked to the rocker handle 1e moves to the TRIP position intermediate between the ON position and the OFF position, and halts. And, in order to reclose the circuit breaker 1 from this state, first the rotary handle 4 is turned to the RESET position. By this means, the tripping mechanism linked to the open/close mechanism 1d of the circuit breaker 1 is reset, and then when the rotary handle 4 reversed and turned to the ON position, the rocker handle 1 e of the circuit breaker 1 moves to the OFF position, and the movable contact point 1 c makes contact with the fixed contact point 1 b, establishing reclosing of the circuit breaker 1.
  • Patent Reference 4 discloses an under-voltage tripping device installed on a main body of a circuit breaker including an electromagnetic under-voltage tripping mechanism, an early-operation auxiliary switch for switching a conductive path of an electromagnet of the electromagnetic under-voltage tripping mechanism in connection with a handle mechanism of the circuit breaker, and a unit case having two opposite ends and external connection terminals at the two opposite ends.
  • Patent Reference 5 discloses a circuit breaker and an auxiliary device including an undervoltage tripping mechanism and an early closing contact mechanism. Both mechanism are coupled to each other.
  • Patent Reference 6 teaches an auxiliary device for a circuit breaker, comprising an electrical protection unit that cooperates, by means of a mechanism, with an opening slider biased by a return spring. In case of a voltage drop, the opening slider is released acting on a safety release lever of an enclosed circuit breaker.
  • auxiliary devices prepared by manufacturers as options for the above-described circuit breakers are adopted to accommodate the specifications of users.
  • optional undervoltage tripping device products include, as described above, normal internal type undervoltage tripping devices not provided with an early closing contact (see Patent Reference 1), and undervoltage tripping devices with an early closing contact (see Patent Reference 2); these specifications further differ according to the type, rated voltage, and other parameters of the circuit breaker.
  • Patent Reference 1 normal internal type undervoltage tripping devices not provided with an early closing contact
  • Patent Reference 2 undervoltage tripping devices with an early closing contact
  • these specifications further differ according to the type, rated voltage, and other parameters of the circuit breaker.
  • auxiliary device types vary according to the environment of use of the circuit breaker, user specifications, and similar.
  • circuit breaker manufacturers must prepare various types of undervoltage tripping devices with different specifications and designs in anticipation of options specified by users, and costs are entailed in stocking and managing such optional products.
  • This invention was devised in light of the above problems, and has as an object the provision of an auxiliary device for a circuit breaker wherein, with respect to an undervoltage tripping device applied to a circuit breaker, optional products related to the undervoltage tripping device can be divided into a plurality of units and configured in advance, and units selected according to option specifications specified by a user can be combined and used with a circuit breaker, to enable accommodation of specifications with various options specified by simple means.
  • an auxiliary device of a circuit breaker is an auxiliary device of a circuit breaker which has, as the auxiliary device, an external operating handle device and an undervoltage tripping device, wherein the undervoltage tripping device is divided into two modules, which are a tripping unit comprising a tripping mechanism and an early closing contact unit comprising an early closing contact; the tripping unit is internally provided in a case of the circuit breaker, the early closing contact unit is externally provided on the external operating handle device such that the early closing contact is linked to an internal mechanism of the external operating handle device, and the early closing contact is closed midway during ON operation of the external operating handle device and before a main circuit contact of the circuit breaker closes.
  • the auxiliary device of a circuit breaker is the external operating handle device, comprising a base mounted on the case of the circuit breaker; a rotary type handle; a sliding base which converts rotation of the handle into linear motion and drives a rocker type handle of the circuit breaker in ON and OFF directions; a pusher, installed on the sliding base and opposed to the rocker type handle from the ON operation direction; and a spring which biases the pusher from the rear, the external operating handle device being configured with a backlash stroke set between the sliding base and the pusher, and the movement of the sliding base corresponding to the backlash stroke is captured, and the early closing contact of the early closing contact unit is caused to perform open/close operation, in the process of turning on the circuit breaker.
  • the early closing contact unit comprises an assembly of a limit switch provided with the early closing contact, and a frame with a terminal which holds the limit switch; the frame is detachably mounted on a base of the external operating handle device, and an operation end of the limit switch is linked to the sliding base of the external operating handle device at this mounted position.
  • auxiliary device of a circuit breaker of this invention by configuring an undervoltage tripping device as described above as an auxiliary device of a circuit breaker, the minimum number of types of optional products can be selected appropriately and applied to the circuit breaker, so that various specified option specifications can be accommodated by simple means.
  • Fig. 1 shows an example of this invention, which is an external operating handle device and undervoltage tripping device mounted as auxiliary devices on a circuit breaker.
  • 1 is the circuit breaker comprising a rocker handle 1e on the top of a case 1a
  • 2 is the external operating handle device
  • 7 is a tripping unit of the undervoltage tripping device, internally provided in the case 1a of the circuit breaker 1
  • 8 is an early closing contact unit of the undervoltage tripping device, detachably mounted externally on the rear-face side of the base 3 of the external operating handle device 2, disposed between [the base 3 and] the circuit breaker 1.
  • the tripping unit 7 is configured with a tripping mechanism, including an electromagnet, mounted on a cassette-type unit case as shown in Fig. 2(a) , similarly to that of Patent Reference 1 described above.
  • 7a is an actuator opposed to a trip crossbar of the circuit breaker, protruding from the unit case, and 7b is a reset lever.
  • Fig. 2(a) the cassette-type unit case as shown in Fig. 2(a)
  • 7a is an actuator opposed to a trip crossbar of the circuit breaker, protruding from the unit case
  • 7b is a reset lever.
  • the early closing contact unit 8 comprises an assembly of a limit switch 8a provided with an early closing contact, and a mounting frame 8b which holds the limit switch 8a;
  • the mounting frame 8b comprises an external connection terminal 8c, terminal screws 8d, and a pair of support legs (snap fits) 8e protruding upward from both ends of the mounting frame 8b.
  • the external operating handle device 2 has substantially the same configuration as the conventional external operating handle device shown in Fig. 8 ; the detailed structure thereof is shown in Fig. 3 . That is, the sliding base 6 mounted on the base 3 of the external operating handle device, guided in a straight line and supported, has a pin 6d erected on the upper-face side thereof which mates with a groove 4b-1 in the turning base 4b, and is linked to the rotary handle 4 via a support shaft 4a. Further, a window hole 6e, with the shape of a small square placed on a large lateral rectangle, is cut out and opened in the plate face of the sliding base 6, and as explained below, a pusher 6b, opposed from the ON side by the rocker handle 1e (see Fig.
  • a cam groove 6f which functions as a dog opening and closing the limit switch 8a (see Fig. 2(b) ) of the above-described early closing contact unit 8 is formed in a side face of the sliding base 6 along the direction of movement.
  • Figs. 4(a) and 4(b) show the assembled state of the external operating handle device 2; when the rotary handle 4 is rotated manually to the ON and OFF positions, the sliding base 6, linked to the handle 4, slides and moves in a straight-line direction, and as shown in Fig. 8 , drives the rocker handle 1e of the circuit breaker 1 to the ON and OFF positions.
  • Fig. 5 shows the state of use in which the early closing contact unit 8 of the undervoltage tripping device is additionally mounted on the external operating handle device 2, mounted on the circuit breaker 1 (although not shown, the tripping unit 7 of the above-described undervoltage tripping device is internally set in the case of the circuit breaker).
  • the early closing contact unit 8 is snap-fit and detachably joined by pressing, from the rear-face side, the support legs 8e provided in the frame 8b into engaging holes 3e (see Fig. 1 ) opened in the base 3 of the external operating handle device 2. Further, in this assembled state, the terminals 8c of the early closing contact unit 8 are connected to the exciting circuit of the electromagnet coil incorporated in the tripping unit 7.
  • Fig. 6 shows the state of use in which an early closing contact unit 8 is not used, and the tripping unit 7 is internally set in the case of the circuit breaker 1.
  • this undervoltage tripping device is to be provided with an early closing contact function
  • by adding the early closing contact unit 8 and mounting on the external operating handle device 2 as in Fig. 5 optional specifications for an undervoltage tripping device with an early closing contact can be accommodated by simple means.
  • Fig. 7 is used to explain transitions in operation of the early closing contact corresponding to handle operation.
  • Figs. 7(a) and 7(e) show a state in which the rotary handle 4 of the external operating handle device 2 is halted in the OFF position.
  • the sliding base 6 is halted on the left end of the movement stroke by the biasing force of a return spring 9 (tension coil spring), and in this position a backlash stroke L1 is held between the rear end of the pusher 6b, being biased by the spring 6c, and the rear end of the window hole 6e opened in the sliding base 6.
  • the limit switch 8a of the early closing contact unit 8 disposed on a side face of the sliding base 6 is opposed to the cam groove 6f of the sliding base 6, and the early closing contact is OFF.
  • the rotary handle 4 of the external operating handle device 2 passes the ON position somewhat, as shown in Fig. 7(c) , and after this overrun halts at the ON position of Fig. 7(d) . Further, accompanying this operation of the rotary handle 4, the sliding base 6 and pusher 8b pass through Fig. 7(g) to halt at the position of Fig. 7(h) .
  • the limit switch 8a of the early closing contact unit 8 holds the ON state even after the main circuit contact of the circuit breaker has closed, and maintains an excitation current in the electromagnet coil incorporated in the tripping unit 7 (see Fig. 2(a) ).
  • the undervoltage tripping device of this embodiment combines a tripping unit 7 and an early closing contact unit 8, and so can exhibit the same operations and functions as the undervoltage tripping device with an early closing contact described in Patent Reference 2. Moreover, there is no need to install a dedicated rotary handle in the circuit breaker which links to the early closing contact, as described in Patent Reference 2, and merely by somewhat modifying the sliding base of the external operating handle device and additionally external mounting the above early closing contact unit 8 on this external operating handle device, an existing internal type undervoltage tripping device (see Patent Reference 1) can be used as-is, and optional specifications for an undervoltage tripping device with an early closing contact function can be accommodated by simple means. By this means, circuit breaker manufacturers can reduce the number of optional products prepared as auxiliary devices for undervoltage tripping devices compared with previously, and costs entailed in stocking and management of such products can be reduced.
  • an optional product related to an undervoltage tripping device is divided into a plurality of units and configured in advance, and units selected according to option specifications specified by a user can be combined and used with a circuit breaker, to enable accommodation of specifications with various options specified by simple means.

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EP10834376.5A 2009-12-04 2010-11-30 Auxiliary device of circuit breaker Not-in-force EP2509091B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009276805A JP5310513B2 (ja) 2009-12-04 2009-12-04 回路遮断器の付属装置
PCT/JP2010/006973 WO2011067922A1 (ja) 2009-12-04 2010-11-30 回路遮断器の付属装置

Publications (3)

Publication Number Publication Date
EP2509091A1 EP2509091A1 (en) 2012-10-10
EP2509091A4 EP2509091A4 (en) 2014-12-10
EP2509091B1 true EP2509091B1 (en) 2016-04-13

Family

ID=44114784

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10834376.5A Not-in-force EP2509091B1 (en) 2009-12-04 2010-11-30 Auxiliary device of circuit breaker

Country Status (6)

Country Link
EP (1) EP2509091B1 (zh)
JP (1) JP5310513B2 (zh)
KR (1) KR101258534B1 (zh)
CN (1) CN102576632B (zh)
TW (1) TWI390571B (zh)
WO (1) WO2011067922A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6123499B2 (ja) * 2013-06-04 2017-05-10 富士電機機器制御株式会社 回路遮断器の外部操作ハンドル装置
DE102018201913A1 (de) * 2018-02-07 2019-08-08 Siemens Aktiengesellschaft Modul für einen Drehantrieb eines elektrischen Schalters, elektrischer Schalter mit solch einem Modul und Verfahren zum Schalten eines elektrischen Schalters

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3503396B2 (ja) 1997-03-06 2004-03-02 三菱電機株式会社 回路遮断器
JP2002324477A (ja) * 2001-04-27 2002-11-08 Fuji Electric Co Ltd 回路しゃ断器用の早入り補助スイッチ付き不足電圧引外し装置
ITMI20011070A1 (it) * 2001-05-22 2002-11-22 Gewiss Spa Dispositivo ausiliario per interuttore magnetotermico
JP3867541B2 (ja) 2001-10-09 2007-01-10 富士電機機器制御株式会社 開閉装置
JP4032693B2 (ja) * 2001-10-19 2008-01-16 富士電機機器制御株式会社 回路しゃ断器の早入り補助スイッチ付き不足電圧引外し装置
JP4215621B2 (ja) * 2003-11-17 2009-01-28 富士電機アセッツマネジメント株式会社 回路遮断器の外部操作ハンドル装置
JP2007134148A (ja) 2005-11-10 2007-05-31 Fuji Electric Fa Components & Systems Co Ltd 回路遮断器の外部操作ハンドル装置
JP4735418B2 (ja) * 2006-05-29 2011-07-27 富士電機機器制御株式会社 回路遮断器の外部操作ハンドル装置

Also Published As

Publication number Publication date
EP2509091A1 (en) 2012-10-10
JP5310513B2 (ja) 2013-10-09
JP2011119163A (ja) 2011-06-16
CN102576632A (zh) 2012-07-11
EP2509091A4 (en) 2014-12-10
TW201126558A (en) 2011-08-01
CN102576632B (zh) 2014-07-23
WO2011067922A1 (ja) 2011-06-09
TWI390571B (zh) 2013-03-21
KR20120058603A (ko) 2012-06-07
KR101258534B1 (ko) 2013-04-30

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