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
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
  • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
  • H01H2011/0093—Standardization, e.g. limiting the factory stock by limiting the number of unique, i.e. different components
• • 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
  • H01H2083/205—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 having shunt or UVR tripping device with integrated mechanical energy accumulator
• • 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
  • H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement

Definitions

• the invention relates to a series of multi-pole circuit breaker different sizes different nominal current capacity with an undervoltage or shunt trip, hereinafter referred to as U / A trigger.
• circuit breakers other than thermomagnetic actuators may also be equipped with a U / A trigger, e.g. according to document EP 619590 Bl.
• An undervoltage release is an electromagnet which actuates the tripping mechanism of the circuit breaker when the power is interrupted. In the current-carrying state, the system is in rest position. The control takes place with a normally closed contact. Undervoltage release trigger in case of power failure, the switch to z. B. to prevent the automatic restart of engines.
• a shunt release is an electromagnet which, when a voltage is applied, triggers the tripping mechanism of the
• Circuit breaker actuated. When de-energized, the system is at rest. The activation takes place with a closing contact. Shunt releases are used for remote release when z. B. a voltage interruption not to
• the disadvantage is that the proposed U / A trigger requires many items due to the integrated energy storage, takes up a large amount of space and that for
• Circuit breaker with low nominal current capacity of the energy storage is not required or otherwise occupied space.
• the thermal release contains in the main flow paths bimetallic strip, which bend in overcurrent and act on a trip bridge, adjusting means for setting the trigger conditions and a force accumulator, which consists of a latch lever and a clamping lever, which can be mutually braced by means of a tension spring. If the overcurrent exceeds the set value
• the trip bridge is moved and pivots the pawl lever from the engagement area with the clamping lever, causing it under the influence of the tension spring performs a movement that triggers the switching mechanism of the power switching device, which has the opening of the main contacts of the power switching device result.
• resetting the power switching device from the tripped state acts connected to the switching mechanism clamping element against the force of the tension spring on the clamping lever and transferred the energy storage again in the clamped state.
• the invention has for its object to reduce the design and manufacturing costs in terms of the use of U / A triggers in a circuit breaker series. Starting from a circuit breaker series of the type mentioned, the object is achieved by the features of the independent claim, while the dependent claims advantageous developments of the invention can be seen. As a result, a U / A release of the same design is provided for all sizes of the series, so that at least one larger size of the series is available
• Nennstromtriess is equipped with a power storage, which consists of a
• Circuit breaker is the cost of manufacture, storage and assembly the parts of the integrated U / A trigger significantly reduced.
• the effort for the energy storage is irrelevant, since such is usually provided in the sizes higher rated current capacity for the thermal tripping.
• Magnetic armature of the U / A trigger coupled release plunger to interact either directly or indirectly with the latch lever. In the latter case, it is expedient to store an intermediate slide or an intermediate lever between the trigger plunger and latch lever.
• Figure 1 an inventive series in perspective view
• Figure 2 belonging to the series of FIG. 1 U / A trigger in perspective
• FIG. 3 shows a size of low rated current capacity from the series according to FIG. 1 in a broken perspective sectional representation
• Figure 4 the tripping action chain of the size of FIG. 3 in perspective
• Figure 5 a detail of the size of FIG. 3 in the region of its switching mechanism in
• Figure 6 a size higher rated current capacity from the series of Figure 1 in broken perspective sectional view.
• Figure 7 the tripping action chain of the size of Figure 6 in perspective.
• FIG. 8 shows a detail of the size of FIG. 6 in the region of its switching mechanism in FIG
• Fig. 1 shows a series of three-pole circuit breaker, which consists of three sizes 1, 2 and 3 different Nennstromtriess. Of the three sizes 1, 2 and 3, the small size 1 has the lowest nominal current capacity, the medium size 2 the medium and the large size 3 the highest rated current capacity. Each size 1, 2 and 3 is of a switch housing 4, 5 and 6 of insulating
• Each of the three sizes 1, 2 and 3 is optionally equipped with a U / A release 10 of the same design, which can be designed as an undervoltage release or as a shunt release.
• the U / A trigger 10 is in one of the front of the
• Switch housing 4, 5 and 6 accessible receiving space 11 to use and connected to outwardly guided control lines 12.
• the U / A trigger 10 of the same type is shown in Fig. 2 on an enlarged scale.
• the U / A trigger 10 is surrounded by a trigger housing 14 made of insulating molding material. From the trigger housing 14 reaches firstly the outer end of a connected to the armature of the U / A trigger 10 release plunger 16 and on the other the Betchanistsfikiee 19 of a release lever. If, upon the occurrence of a trip condition, the U / A trigger transitions from its idle state to the trip state, the movement of the trigger plunger 16 causes the latch to transition to the tripped state. The main contacts of the circuit breaker are forced open. Before switching the circuit breaker back on, the switch lock must be reset using the control buttons 7, 8 or 9.
• the release lever holds the Trigger plunger 16 and thus the armature while in the rest position until the circuit breaker releases the armature of the U / A trigger 10 via the release lever in the course of switching on the circuit breaker, so that in the event of a trigger condition (undervoltage or working current), the release plunger 16 can move from the rest position.
• Swing lever 22 associated with the control knob 7 switch lock 24 causes the closing and opening of the main contacts, of which in Fig. 3, a fixed contact 26 and a movable contact 28 which moves in a equipped with arc quenching 30 contact space 32 to see an outer Heidelbergpols are.
• Fig. 4 shows how in the resting state of the U / A trigger 10 of the trigger plunger 16 and the magnet armature 17 connected thereto is held on the release lever 20 in its rest position.
• the release lever 20 mounted in the trigger housing 14 and designed as a two-sided lever is acted upon by a trigger tension spring 18 unilaterally fixed in the trigger housing 14 (in the illustration of FIG. 3 in the clockwise direction and in the illustration of FIG. 4 in the counterclockwise direction).
• a first release member 34 is attached on the pivot lever 22 a first release member 34 is attached.
• Swivel lever 22 is supported in the switch lock 24 in a pivot bearing 36 (FIG. 5).
• the pivot lever 22 is pivoted, i. according to Fig. 3 and Fig. 5 in the counterclockwise direction.
• the reference numeral 38 In the course of the switch-on movement of the pivot lever 22 reaches a designated by the reference numeral 38
• Trigger provided with a bimetallic strip 48 and a magnetic release with a hinged armature 50, which also act triggering when an overload or a short circuit.
• a bimetallic strip 48 and a magnetic release with a hinged armature 50 which also act triggering when an overload or a short circuit.
• one of a mounted in the switch housing 4 release shaft 44 is pivoted as shown in FIG. 4 against the restoring action of a torsion spring 46 in the counterclockwise direction and unlatches by means of a protruding from the trigger shaft 44 extension 52, the lock pawl 42 from the switch lock 24.
• Fig. 3 and Fig. 4 not all bimetallic strips 48 and hinged anchors 50 of all three poles can be seen or shown for better illustration.
• the size 2 average rated current capacity also has on the size of 1 described and cooperating functional elements and can be equipped with the U / A trigger 10 type described above. Therefore does not need to be discussed in detail on the size 2.
• the size 3 with high Nennstromtriess will be described with reference to Figures 6 to 8 of the inventive series. Likewise and the same effect as in size 1, the size 3 has the following details: a in
• Switch housing 6 mounted switch lock 25 with a connected to the control knob 9 and mounted in a pivot bearing 37 pivot lever 23; Farther fixed contacts 27, movable contacts 29, arc extinguishing plates 31 in each case a contact space 33; furthermore a verklinkbare with the latching mechanism 25
• Locking pawl 43 and further thermal release with bimetallic strip 49 and magnetic release with hinged anchors 51 In FIG. 6 and FIG. 7, not all bimetallic strip 49 and hinged armature 51 of all three poles can be seen or shown for better illustration.
• This energy accumulator 52 consists of a switch housing 6 with a latch lever 56 pivotally mounted with its pawl lever axis 54, also in the switch housing 6 with a tripping lever 60 pivotally mounted with its trigger lever axis 58 and a tension spring 62 in the form of a spiral compression spring, under the action of which pawl lever 56 and Release lever 60 are held in mutual tensioned state.
• the bimetallic strip 49 and the hinged armature 51 act in overload or short circuit on suitably arranged extensions 64 and 65 of the pawl lever 56.
• the latch lever 56 is pivoted in the illustration of FIG. 6 in the clockwise direction and in FIG. 7 in the counterclockwise direction. By this pivoting, the release lever 60 releases from the
• Relaxing tension spring 62 pivoted in the illustration of FIG. 6 in the clockwise direction and in FIG. 7 in the counterclockwise direction.
• the release lever 60 hits due to the relaxing tension spring 62 with sufficient force on the lock pawl 43 of the switching mechanism 25 and brings this to trigger.
• an intermediate lever 67 is further mounted between the U / A trigger 10 and the latch lever 56. If the U / A trigger 10 reacts to a trigger situation, its trigger plunger 16 strikes the free end of the intermediate lever 67, pivots it in the clockwise direction according to FIG. 7, so that the intermediate lever 67 strikes the latch lever 56. As a result, the energy storage 52 is relaxed and the
• the switching mechanism 25 size 3 requires higher forces to trigger than the switching mechanism of sizes 1 and 2. These higher forces can be used by the Bimetallic strip 49 and hinged anchors 51 as well as for the entire series
• Pawl lever 56 The energy storage 52 is now available for a new triggering process.
• Lock pawl 43 results. Otherwise, the mentioned effect chain would lead to a delayed releasing of the U / A release and is caused by the switch-on direction of the
• Swing lever 22 and 23 (according to Figures 5 and 8 in the counterclockwise direction) advanced arrangement of the second release element 35 against the first release element 34 compensated in time.
• the invention described above finds application for the protection of
• the invention can be designed such that the release plunger 16 of the U / A release 10 acts directly on the latch lever 56 of the energy accumulator 52 without the use of an intermediate lever. It is also in accordance with the invention, if instead of an intermediate lever 67, an intermediate slide between Release plunger 16 and latch lever 56 is arranged. Also within the meaning of the invention, a stored in the switch housing 6 and between the release lever 60 of the energy accumulator 52 and the lock pawl 43 mounted intermediate member.

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• Details Of Connecting Devices For Male And Female Coupling (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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ID=47019031

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (1)

Citations (5)

Family Cites Families (2)

• 2011
  • 2011-10-17 EP EP11185442.8A patent/EP2584582A1/de not_active Withdrawn
• 2012
  • 2012-10-17 EP EP12772793.1A patent/EP2769399B1/de active Active
  • 2012-10-17 BR BR112014009331A patent/BR112014009331A2/pt not_active IP Right Cessation
  • 2012-10-17 CN CN201280050816.4A patent/CN103875053B/zh active Active
  • 2012-10-17 WO PCT/EP2012/070587 patent/WO2013057147A1/de active Application Filing

Patent Citations (5)

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