EP1059653A2 - Thermischer Lastschalter - Google Patents

Thermischer Lastschalter Download PDF

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Publication number
EP1059653A2
EP1059653A2 EP00107771A EP00107771A EP1059653A2 EP 1059653 A2 EP1059653 A2 EP 1059653A2 EP 00107771 A EP00107771 A EP 00107771A EP 00107771 A EP00107771 A EP 00107771A EP 1059653 A2 EP1059653 A2 EP 1059653A2
Authority
EP
European Patent Office
Prior art keywords
actuator
contact
trip
trip actuator
metallic element
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.)
Withdrawn
Application number
EP00107771A
Other languages
English (en)
French (fr)
Other versions
EP1059653A3 (de
Inventor
Richard W. C/O Carlingswitch Inc. Sorenson
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.)
Individual
Original Assignee
Individual
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
Priority claimed from US09/328,107 external-priority patent/US6094126A/en
Application filed by Individual filed Critical Individual
Publication of EP1059653A2 publication Critical patent/EP1059653A2/de
Publication of EP1059653A3 publication Critical patent/EP1059653A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H73/22—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 having electrothermal release and no other automatic release
    • H01H73/26—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 having electrothermal release and no other automatic release reset by tumbler
    • 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
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • H01H2071/124—Automatic release mechanisms with or without manual release using a solid-state trip unit with a hybrid structure, the solid state trip device being combined with a thermal or a electromagnetic trip
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/206—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition with thermal shunt trip
    • 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
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/527—Manual reset mechanisms which may be also used for manual release actuated by lever making use of a walking beam with one extremity latchable, the other extremity actuating or supporting the movable contact and an intermediate part co-operating with the actuator
    • 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
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition

Definitions

  • the present invention relates to thermal circuit protector devices which also function as ON/OFF switches, and deals more particularly with a structure that is simpler and less expensive to manufacture.
  • the thermal circuit protector/switch structure also prevents a continuance or a cycling of an overload condition in the event manual override is attempted.
  • Switches for use either as a thermal protector circuit breaker or switch are known. Snap action bi-metallic elements have been embodied in similar thermal protectors which employ a flag of insulating material to project between the switch contacts when the bi-metal element senses an overload condition. See U.S. Pat. Nos. 5,089,799 and 5,264,817 for examples of thermal protective switches of the type utilizing such a flag.
  • thermostatic switches have a snap action disc that can be reset by a push button. See U.S. Patent Nos. 4,791,397 and 4,628,295 for examples of disc type devices.
  • thermal circuit breakers are also known. See U.S. Patent Nos. 4,931,762; 4,937,548; and 4,258,349 for examples.
  • thermal circuit breaker and switch uses the bi-metal element as the contact arm. See U.S. Patent No. 5,847,638.
  • the general purpose of the present invention is to provide a thermal circuit breaker and switch that does not require a flag, and has both the appearance and functional capability of a conventional rocker switch, and wherein the device is also capable of "trip free" operation so that even if manually held in the 'on' or closed position, will not result in re-closing of the contacts and hence reheating of the bi-metal.
  • the present invention avoids the stresses imposed on the bi-metal element when used as a contact arm although the bi-metal is provided in the circuit path. Individual contact and trip actuators are provided to avoid stressing the bi-metal, thus improving both accuracy and stability of operation. While slightly more complicated and expensive than the embodiment using the bi-metal as the contact arm, this invention remains less expensive to manufacture than other thermal circuit breaker designs which have the bi-metal separate from the contact.
  • a molded hollow housing of either single body or split case construction is provided with a bottom wall and defines a top opening for pivotally receiving a rocker or bat type operator.
  • the housing interior has a sidewall defining at least one vertical track to movably receive a contact actuator.
  • An integrally molded socket pivotally receives and supports a trip actuator.
  • the housing bottom wall is fitted with fixed first and second terminals.
  • the rocker includes an extension or depending post that projects inside said housing and engages the contact actuator.
  • the rocker includes an engagement hook to positively engage a protrusion or post on a contact actuator.
  • the rocker incorporates a molded section having surfaces to limit movement of both the contact actuator and the rocker at least when the rocker is in the 'off' position.
  • a single compression spring biases both the rocker toward the 'off' position and the trip actuator toward the normal or reset position.
  • One end of a movable conductive contact arm is fixedly mounted on a conductive mounting plate and electrically connected to the first terminal.
  • the opposite free end of the contact arm carries a movable contact element and is biased upwardly toward the contact actuator to normally urge said movable contact element away from a fixed contact element mounted to the second terminal.
  • the contact actuator includes lateral projections that are slideable in said housing vertical track, such that movement of the rocker also moves the movable contact arm at least when said device is operated as a switch and there is no overload condition.
  • the trip actuator is 'L' shaped and has upstanding and horizontal legs that are fixedly joined at adjacent ends.
  • the 'L' shaped trip actuator is pivotally supported at this juncture in a socket defined for it in the housing.
  • the trip actuator has an additional surface that abuts the socket when the trip actuator is in the reset or 'off' position, thereby limiting rotation in that direction.
  • the horizontal leg has projecting pins received in vertical channels in the housing and the upstanding leg engages said contact actuator via interfacing surfaces on both the contact actuator and the trip actuator.
  • a bi-metallic element moves into engagement with the horizontal leg of the trip actuator, pivoting the trip actuator and thereby disengaging the upstanding leg of the trip actuator from the contact actuator. This allows the movable contact arm's inherent bias to open the contacts as a result of the overcurrent/overheat condition in the bi-metallic element.
  • the bi-metallic element is 'U' shaped having two arms. The end of one arm is fixedly connected to the first terminal, and the end of the opposing arm is fixedly connected to the contact arm, preferably through a conductive jumper.
  • the bi-metallic element electrically connects the first terminal to the movable contact arm and its movable contact.
  • the bi-metallic element exhibits a thermally responsive change in shape or curvature such that the unrestrained free end base of the 'U' will bend upwardly toward the horizontal leg of the trip actuator in response to a predetermined current generating a temperature rise of the bi-metallic element.
  • Biasing means in the form of a single compression spring is provided between the underside of the rocker and the upper end of the trip actuator's upstanding leg.
  • a single spring biases both the rocker to its 'off' position and the trip actuator to its normal position engaging the contact actuator in the absence of an overload condition.
  • the rocker's lower extension cannot cause the contact actuator to move the movable contact arm into a contact closed condition since one end of the contact actuator is not constrained by engagement with the trip actuator.
  • the spring bias forces said rocker toward the 'off' position.
  • FIG. 1 shows a molded hollow housing 20 of the type having a generally rectangular upwardly open cavity for containing the following components.
  • a pivotally mounted rocker 22 or other operator has laterally extending axle defining projections 22a received in axle openings 20a in the housing sidewalls 20b.
  • the housing sidewalls 20b define molded vertical tracks 20c for slidably receiving track guide projections 24a on a contact actuator 24, and sockets 20d to receive axle defining projections 26a on a trip actuator 26.
  • the L-shaped trip actuator 26 is pivotally mounted in the housing 20.
  • the sockets 20d incorporate surfaces 201 to abut stop surfaces 26f and thus limit rotation of the trip actuator 26.
  • An integrally molded barrier 20e in the housing insulates a terminal element 34 that has a fixed contact 28 mounted on one end of said terminal element 34.
  • a load and a line terminal extend through slots in the housing bottom wall 20i.
  • the load terminal 32 incorporates a threaded opening 32a which accepts an adjustment or calibration screw 36.
  • the load terminal 32 extends upwardly along a housing end wall 20g and connects with a bi-metallic element 38.
  • the element 38 is shown in FIG. 1 as being "U" shaped and having two arms 38a and 38b substantially parallel to each other.
  • the bi-metallic element 38 is oriented in a plane roughly parallel to the housing bottom wall 20i, and has a thermally responsive character such that a rise in temperature, as in an overcurrent condition, causes the bi-metallic element to curve towards the trip actuator 26.
  • the end of the calibration screw 36 contacts the lower surface of the bi-metallic element 38 to define the normal configuration for the bi-metallic element 38, and hence the extent of the deformation thereof that is required to trip the trip actuator 26.
  • the "U" shaped bi-metallic element has the end of one arm 38a connected to a fixed end of a movable contact arm 40 through a conductive jumper 52.
  • the one bi-metallic element arm 38a connects directly to the fixed end of said movable contact arm 40.
  • An opposing arm 38b of the bi-metallic element is connected to a particularly adapted section 32b of the load terminal 32 so that current flows through the bi-metallic element 38.
  • the movable contact arm 40 is composed of a spring metal material and has a free end which is biased upward and away from a fixed contact element 28. Said free end has a movable contact element 30.
  • the fixed contact element 28 is mounted on the line terminal 34 and so positioned that when the movable contact arm 40 is forced downward by the contact actuator 24, the movable contact element 30 closes a circuit with the fixed contact element 28.
  • the rocker or operator 22 is pivotally mounted in housing axle openings 20a, and is biased by a spring 42 to the open-circuit or 'off' position.
  • An integrally molded extension 22b or depending post is provided in said rocker and is oriented roughly vertical when the rocker 22 is in the 'on' position.
  • the rocker extension's surface 22c constitutes a first engagement means, which movably engages the contact actuator's upper surface 24d at least when the rocker is moved toward the 'on' position.
  • Molded within the rocker extension 22b is an actuator hook 22i which acts as a second engagement means, and which removably engages an engagement post 24i on the contact actuator at least when the rocker is moved toward the 'off' position.
  • the contact actuator 24 is provided between the upwardly biased movable contact arm 40 and the rocker 22.
  • An actuator stop 24b abuts the contact stop 22g at the rocker's lower surface to limit upward movement of the right end (as shown in FIG. 5) at least when the rocker is in the 'off' position. This upward movement is effected by the upward biasing pressure of the contact arm 40 against surface 24h of the contact actuator.
  • the rocker 22 is biased to the 'off' position by the spring 42 and is stopped in the appropriate 'off' position by the abutment of the rocker position stop 22h with the housing vertical track interior sidewall 20j.
  • the detent 24e in the top surface of the contact actuator 24 latches the rocker's surface 22c with sufficient pressure to overcome the rocker's minimal spring bias to the 'off' position.
  • the rocker is thereby held to the 'on' position, and is stopped there when an 'on' rocker stop 22f abuts a vertical track exterior sidewall 20k, as illustrated in FIG. 7.
  • the contact actuator 24 has a notch 24f at the left end (as shown), which selectively engages a trip actuator slotted trip stop 26d for a purpose to be described.
  • the trip actuator 26 is of an "L" shape with horizontal and vertical legs (26b and 26c, respectively), and wherein the horizontal leg 26b is positioned between the movable contact arm 40 and the bi-metallic element 38.
  • Axle defining projections 26a on the trip actuator pivotally support it in the molded socket 20d defined by the housing.
  • An extension of said axle defining projections defines a stop surface 26f.
  • the sockets 20d incorporate surfaces 20l that abut the trip actuator's stop surface 26f when in the reset position, shown in FIG. 5, thereby limiting rotation of the trip actuator in that direction.
  • the trip actuator's upstanding leg 26c rise above a surface 26d which normally engages the notch 24f of the contact actuator to prevent downward movement of the notched end of the contact actuator.
  • the rocker lower surface 22c acts upon the surface 24d of the contact actuator at least when the rocker 22 is moved toward the 'on' position so that the contact actuator 24 will pivot approximately where it abuts the surface 26d of the trip actuator. This pivot action moves the right end (as shown) of the contact actuator 24 downward and surface 24h drives down the movable contact arm 40 to close the contact elements (28 and 30).
  • a compression spring 42 is provided between the top of the trip actuator's upstanding leg 26c and the underside of the rocker 22, biasing said rocker toward the 'off' position.
  • the spring 42 is so oriented that the spring force vector always passes slightly inboard of the trip actuator's pivot axis (shown generally at 26g), thereby always biasing both the rocker to the 'off' position and the trip actuator to the normal, or reset position.
  • FIG. 5 shows the rocker 22 in the spring biased 'off' position, the trip actuator 26 in the 'reset' position, and the notched end of the contact actuator 24 abutting the trip stop 26d of said actuator.
  • the actuator hook 22i positively engages the engagement post 24i to assure proper positioning of the contact actuator 24.
  • the upward bias of the movable contact arm 40 pushes the contact actuator 24 upwards until the contact actuator abuts the rocker at surfaces 22g and 22c.
  • FIG. 6 shows the invention with the rocker 22 in transit towards the 'on' position with pressure applied to the left portion (as shown) of said rocker.
  • Rotation of the rocker causes the lower surface 22c to travel across the contact actuator surface 24d, depressing the contact actuator in a downward direction as it pivots at the notched end which is held in place by the trip stop 26d.
  • the contact actuator 24 thereby transfers downward pressure at 24h to the contact arm 40 causing the contact elements 28 and 30 to close.
  • FIG. 7 shows the device in the closed circuit position with no overload condition.
  • the rocker 22 is fully depressed to the 'on' position, wherein the rocker extension lower surface 22c rests in the 'on' position detent 24e of the contact actuator 24, and said contact actuator holds the movable contact arm 40 against its bias so that the contact elements (28 and 30) connect.
  • the rocker is limited in the 'on' position by its 'on' position stop 22f abutting the vertical track exterior sidewall 20k.
  • the bias of the compression spring 42 is insufficient to overcome the resistance of the rocker extension lower surface 22c in the 'on' position detent 24e of the contact actuator 24.
  • FIG. 8 shows the device in the open-circuit position during an overload condition despite the rocker 22 being manually held to the 'on' position.
  • the device is subjected to an electrical load greater than its rating, causing the bi-metallic element 38 to heat up and curve upwards and engage the trip actuator's horizontal leg 26b.
  • Such engagement and the bias of the element 38 itself overcomes the slight bias of the compression spring 42 and causes the trip actuator to pivot around its axle projections 26a that rest in the molded housing socket 20d. Consequently, the trip actuator's upstanding leg 26c rotates outboard (counter-clockwise as shown) toward the housing end wall 20g. Such rotation moves the trip stop 26d out of contact with the corresponding notch 24f of the contact actuator 24.
  • FIG. 8 illustrates the 'trip free' operation in that the contacts remain open during an overcurrent condition despite the rocker being forcibly held to the 'on' position.
  • FIG. 9 shows the invention with the rocker 22 in transit after an overload condition.
  • the compression spring 42 drives the rocker to the 'off' position, and the rocker surface 22c slides from detent 24e to surface 24d on the contact actuator, due to the shift of the plane of the contact actuator 24 as previously described.
  • the rocker actuator hook 22i engages the engagement post 24i, raising the notched end of the contact actuator to positively assure its proper orientation in relation to the trip actuator's trip stop 26d.
  • the bi-metallic element 38 cools and returns to its undeflected shape, the trip actuator 26 rotates (clockwise as shown) back to its reset position due to the bias of the compression spring 42, and surface 26d of the trip actuator moves underneath surface 24f of the contact actuator, returning the invention to the position shown in FIG. 5.
  • FIG. 10 An alternative embodiment is illustrated in FIG. 10, whereby the housing 20 is modified to incorporate a molded housing stop 20f that serves the functions of the rocker stop surfaces 22g and 22h of the first embodiment.
  • This housing stop 20f serves to limit upward movement of the right end (as shown) of the contact actuator 24, and additionally to serve as an 'off' position stop for the rocker 20.
  • the rocker modified for the first alternative embodiment is shown in isolation at FIG. 11.
  • FIG. 12 A second alternative embodiment is shown in FIG. 12, wherein the rocker extension 22b incorporates inward facing projections 22d as the first engagement means, and which contact the lower surface of the contact actuator at least when the rocker is moved toward the 'on' position, as opposed to the actuator hook in the first embodiment.
  • the contact actuator 24 does not include rocker engagement posts in this second alternative embodiment, but instead incorporates reset surfaces 24g which are particularly adapted to engage complementary surfaces on the trip actuator.
  • FIGs. 13 and 14 show the contact actuator and rocker, respectively, modified for the second alternative embodiment.
  • any of the above described embodiments can be modified to incorporate remote sensing means.
  • One such modification has the bi-metal 38 completely separate from the switch circuit between terminals 32 and 34, with an independent terminal on each of its arms 38a and 38b.
  • the bi-metal may thereby be connected to a circuit to enable the switch circuit to be opened by applying an overload current to the bi-metal from a remote source.
  • a second remote sensing configuration incorporates a solid state sensor to detect the reaching of a particular voltage limit in the circuit, or alternatively, the reaching of a designated pre-programmed time limit after the switch circuit has been closed.
  • the sensor circuit activates a solid state switch circuit to shunt an appropriate amount of current passing through the bi-metal 38 to ground. This current being shunted through the bi-metal to ground will be adequate to cause the bi-metal to overheat, thereby resulting in the bi-metal's activating the trip actuator and opening the contacts 28 and 30 of the switch circuit.
  • the bi-metal not only provides the normal current protection feature, but simultaneously serves as the driving mechanism of the shunt circuit to effect an opening of the switch contacts when directed by the sensor. While numerous conditions can be monitored, depending upon the programming of the solid state sensor, the bi-metal's shunt-to-ground placement of the solid state switch is the significant feature. This placement preserves the bi-metal's normal function of overcurrent protection. Many alternative or combined conditions may be monitored by the sensor, such as time, ground faults, low or fluctuating voltage, etc.
  • the solenoid may also be controlled by a remote trip circuit which would be connected to a neutral terminal.
  • the bi-metallic element can be employed with a solid state switch but without a solid state sensor circuit.
  • the solid state switch in this version may be controlled by a remote sensor circuit which would apply a signal to a terminal to activate the solid state switch, causing it to shunt a controlled current passing through the bi-metallic element to ground, or neutral, and thereby trip the mechanism, opening the mechanical switch.
  • Another combination example is a solenoid in place of the bi-metallic element with the solid state switch.
  • the solid state switch would be controlled by a remote sensor circuit which would apply a signal to a terminal to activate the solid state switch causing it to apply current to the solenoid and thereby trip the mechanism, opening the mechanical switch.
  • any of the above embodiments or modifications may also be incorporated into a double or multi pole thermal circuit breaker and switch whereby a single trip action by a bi-mettalic element or solenoid in any one or more of the poles causes all the embodied poles to open.
  • a multi-pole function would include two or more thermal circuit breaker and switch circuits mounted side by side in one housing. Common tripping of the multi-poles would be effected by the use of either a single trip actuator serving multi-poles or by inter-connecting separate trip actuators at each pole by linking them with a connecting pin or rod.

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  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
EP00107771A 1999-06-08 2000-04-11 Thermischer Lastschalter Withdrawn EP1059653A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US328107 1999-06-08
US09/328,107 US6094126A (en) 1999-06-08 1999-06-08 Thermal circuit breaker switch
US388771 1999-09-02
US09/388,771 US6154116A (en) 1999-06-08 1999-09-02 Thermal circuit breaker switch

Publications (2)

Publication Number Publication Date
EP1059653A2 true EP1059653A2 (de) 2000-12-13
EP1059653A3 EP1059653A3 (de) 2002-01-23

Family

ID=26986224

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107771A Withdrawn EP1059653A3 (de) 1999-06-08 2000-04-11 Thermischer Lastschalter

Country Status (4)

Country Link
EP (1) EP1059653A3 (de)
JP (1) JP2001006514A (de)
CN (1) CN1276617A (de)
NO (1) NO20002823L (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008063412A2 (en) 2006-11-10 2008-05-29 Siemens Energy & Automation, Inc. Lighting control module contact arm & armature plate
TWI692792B (zh) * 2019-01-15 2020-05-01 易湘雲 開關或用電設備的過熱斷電方法

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US6577221B1 (en) * 2001-11-30 2003-06-10 Ming-Shan Wang Safety switch
JP4628201B2 (ja) * 2005-07-04 2011-02-09 游聰謀 電気回路制御保護器
JP4628203B2 (ja) * 2005-07-05 2011-02-09 游聰謀 電気回路制御保護器
JP2009032633A (ja) * 2007-07-30 2009-02-12 Shuzo Kushida 手動復帰型モータープロテクター．
JP2009059675A (ja) * 2007-08-30 2009-03-19 Shuzo Kushida 電気機器用過負荷保護装置
KR101056195B1 (ko) 2009-02-07 2011-08-12 주식회사 케이원 코퍼레이션 2 극 바이메탈 스위치의 단자 연동 구조
CN105390350B (zh) * 2015-12-08 2017-11-10 上海电科电器科技有限公司 过载长延时保护机构
JP6763039B2 (ja) * 2018-07-03 2020-09-30 湘雲 易 スイッチまたは電気を使用する設備の過熱電力切断方法
CN110676118B (zh) * 2018-07-03 2021-11-02 易湘云 开关的过热破坏式断电方法
CN117629616B (zh) * 2024-01-26 2024-04-26 广东控银实业有限公司 摇杆测试方法及系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE838920C (de) * 1950-03-23 1952-05-15 Cornelius Weise Selbstschalter mit Kipphebelbetaetigung
FR2390824A1 (fr) * 1977-05-11 1978-12-08 Ellenberger & Poensgen Disjoncteur a maximum de courant a bascule de fermeture-coupure
EP0079271A1 (de) * 1981-11-06 1983-05-18 Merlin Gerin Abzweigschalter mit Leistungskontrolle durch einen Steuermodul
FR2550005A1 (fr) * 1983-07-28 1985-02-01 Bassani Spa Commutateur automatique unipolaire de petites dimensions
EP0513423A1 (de) * 1991-05-17 1992-11-19 Siemens Aktiengesellschaft Leitungsschutzschalter mit Fernauslösung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE838920C (de) * 1950-03-23 1952-05-15 Cornelius Weise Selbstschalter mit Kipphebelbetaetigung
FR2390824A1 (fr) * 1977-05-11 1978-12-08 Ellenberger & Poensgen Disjoncteur a maximum de courant a bascule de fermeture-coupure
EP0079271A1 (de) * 1981-11-06 1983-05-18 Merlin Gerin Abzweigschalter mit Leistungskontrolle durch einen Steuermodul
FR2550005A1 (fr) * 1983-07-28 1985-02-01 Bassani Spa Commutateur automatique unipolaire de petites dimensions
EP0513423A1 (de) * 1991-05-17 1992-11-19 Siemens Aktiengesellschaft Leitungsschutzschalter mit Fernauslösung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008063412A2 (en) 2006-11-10 2008-05-29 Siemens Energy & Automation, Inc. Lighting control module contact arm & armature plate
WO2008063412A3 (en) * 2006-11-10 2008-09-25 Siemens Energy & Automat Lighting control module contact arm & armature plate
US7968813B2 (en) 2006-11-10 2011-06-28 Siemens Industry, Inc. Switching device contact arm and armature plate
TWI692792B (zh) * 2019-01-15 2020-05-01 易湘雲 開關或用電設備的過熱斷電方法

Also Published As

Publication number Publication date
NO20002823D0 (no) 2000-06-02
EP1059653A3 (de) 2002-01-23
NO20002823L (no) 2000-12-11
CN1276617A (zh) 2000-12-13
JP2001006514A (ja) 2001-01-12

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