WO2008124962A1 - Déclencheur pour disjoncteur différentiel ouvert au repos - Google Patents

Déclencheur pour disjoncteur différentiel ouvert au repos Download PDF

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Publication number
WO2008124962A1
WO2008124962A1 PCT/CN2007/001164 CN2007001164W WO2008124962A1 WO 2008124962 A1 WO2008124962 A1 WO 2008124962A1 CN 2007001164 W CN2007001164 W CN 2007001164W WO 2008124962 A1 WO2008124962 A1 WO 2008124962A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
trip unit
trip
armature
fault circuit
Prior art date
Application number
PCT/CN2007/001164
Other languages
English (en)
Chinese (zh)
Inventor
Xuguang Li
Xiaobing Dong
Yi Yin
Original Assignee
Hisetec Electronic 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 Hisetec Electronic Co., Ltd. filed Critical Hisetec Electronic Co., Ltd.
Priority to PCT/CN2007/001164 priority Critical patent/WO2008124962A1/fr
Publication of WO2008124962A1 publication Critical patent/WO2008124962A1/fr

Links

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
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly

Definitions

  • the invention relates to a ground fault circuit breaker accessory, in particular to a trip unit for a normally open ground fault circuit breaker.
  • the ground fault circuit breaker is mainly used to cut off the power supply to make necessary protection when the equipment has a high impedance or low resistance short circuit to the ground or the neutral line to the ground. Due to the high sensitivity and fast action of the ground fault circuit breaker, it is unmatched by other protective devices such as fuses and automatic quick switches.
  • the action mechanism of the ground fault circuit breaker to quickly cut off the power supply is a trip unit.
  • the working status of the general trip unit is normally open and normally closed. The normally closed release not only enables the dynamic connection of the moving and static contacts to be realized, but also the mechanical pressure between the dynamic and static contacts completely depends on the electromagnetic thrust of the trip unit or the armature that partially relies on the trip unit.
  • the advantages are reliable operation, simple circuit and mechanism structure, and the disadvantage is that the coil of the trip unit needs to consume part of the power.
  • the normally open type release device relies on providing an instantaneous current to the trip unit coil, and the armature of the trip unit instantaneously leaves the equilibrium position under the driving of the electromagnetic force, and cooperates with the lock mechanism to realize the electrical connection of the static and dynamic contacts.
  • the mechanical pressure between the moving and stationary contacts is provided by the lock structure.
  • the normally open type release is realized by the lock mechanism and the logic circuit, and the mechanism is relatively complicated, but in the normal working state, no current flows through the coil of the trip unit, and no power is consumed.
  • the functionality of the dedicated chip is simple, and the normally closed structure is simple in design. Therefore, the common ground fault circuit breaker generally adopts a normally closed type trip unit.
  • a trip unit for a normally open ground fault circuit breaker comprising a bracket, a static contact, a moving contact connected to the bracket, a lock mechanism, a reset button fixed on the bracket and testing a button, an armature and a trip unit coil, the trip coil comprising a first coil of a driving armature pressing and locking mechanism controlled by a programmable integrated module and a driving armature pulling and locking mechanism controlled by a programmable integrated module Two coils.
  • the programmable integrated module controls the trip unit coil through a switch tube.
  • the invention has the following advantages: Since the normally open type release device is realized by using the bypass pipe and the trip unit, no current flows in the coil and does not consume power; when there is a reverse wiring failure, the coil of the trip unit has no working power supply The armature cannot be driven to realize the lock action, the static and dynamic contacts can not realize the electrical connection, and the reverse wiring protection is realized; when there is a wrong wiring condition, the gate of the switch tube is set to the low level by the programmable integrated module, and tripping The first coil of the device is in an open state, and the electrical connection of the moving and static contacts cannot be realized, and the wrong wiring protection is realized.
  • FIG. 1 is a schematic structural view of a normally open type ground fault circuit breaker of the present invention
  • FIG. 2 is a structural view of the normally open type ground fault circuit breaker when the moving and static contacts are closed;
  • FIG. 3 is a structural view of the normally open type ground fault circuit breaker when the moving and static contacts are separated.
  • a trip unit for a common earth fault circuit breaker including a trip unit.
  • the programmable integrated module I/O port is set to a high level of the switch tube, the switch tube is turned on, and the trip unit is turned on.
  • the second coil 2 the second coil 2 is charged, and the armature 7 is driven by electromagnetic force.
  • the armature 7 drives the slider 10 to move from the position 7a of Fig. 2 to the position 7b of Fig. 3, the lock mechanism 4 is moved from the position 4a of Fig. 2 to the position 4b of Fig. 3, and the movable contact 5 is disengaged by the bracket 3
  • the stationary contact 6 is moved from the position 5a of Fig. 2 to the position 5b of Fig. 3, and the power supply side and the load side are separated by the dynamic and static contacts, thereby realizing the electrical disconnection function in the fault state.
  • the programmable integrated module sets the gate of the switch tube to a high level through the I/O port, and the bidirectional switch tube is turned on, and the second coil 2 of the trip unit is turned on.
  • the second coil 2 is charged, the armature 7 is driven by electromagnetic force, and the armature 7 pulls the lock mechanism 4.
  • the armature 7 is moved from position 7a of Fig. 2 to position 7b of Fig. 3.
  • the lock mechanism is moved from the position 4a of Fig. 2 to the position 4b of Fig. 3.
  • the movable contact 5 is driven away from the static contact 6 by the bracket 3, moves from the position 5a of FIG. 2 to the position 5b of FIG. 3, and the power supply side and the load side are separated by the dynamic and static contacts, thereby realizing the electrical connection in the fault state. Disconnect function.
  • the programmable integrated module sets the gate of the switch tube to the low level through the I/O port, the switch tube is not conducting, the first coil 1 of the trip unit is not charged, and the armature 7 cannot press the lock mechanism 4, which cannot be realized. Lock action. That is, the armature 7 cannot be moved from the position 7b of Fig. 3 to the position 7a of Fig. 2. The lock mechanism 4 cannot be moved from the position 4b of Fig. 3 to the position 4a of Fig. 2. The movable contact 5 cannot be disengaged from the fixed contact 6 by the support 3, and is moved from the position 5b of Fig. 3 to the position 5a of Fig. 2.

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Abstract

La présente invention concerne un déclencheur pour disjoncteur différentiel ouvert au repos. Il comprend un châssis (5), un contact statique (6), un contact mobile (5) connecté au châssis (3), un mécanisme de verrouillage (4), un bouton de rétablissement (8) et un bouton de test (9) montés sur le châssis, un induit et une bobine de déclenchement. La bobine de déclenchement est constituée de la première bobine (1) et de la deuxième bobine (2) commandées par un module d'intégration programmé de façon à faire que l'induit pousse et tire sur le mécanisme de verrouillage.
PCT/CN2007/001164 2007-04-11 2007-04-11 Déclencheur pour disjoncteur différentiel ouvert au repos WO2008124962A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/001164 WO2008124962A1 (fr) 2007-04-11 2007-04-11 Déclencheur pour disjoncteur différentiel ouvert au repos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/001164 WO2008124962A1 (fr) 2007-04-11 2007-04-11 Déclencheur pour disjoncteur différentiel ouvert au repos

Publications (1)

Publication Number Publication Date
WO2008124962A1 true WO2008124962A1 (fr) 2008-10-23

Family

ID=39863216

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/001164 WO2008124962A1 (fr) 2007-04-11 2007-04-11 Déclencheur pour disjoncteur différentiel ouvert au repos

Country Status (1)

Country Link
WO (1) WO2008124962A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1759513A (zh) * 2003-02-03 2006-04-12 莱维顿制造有限公司 利用电桥式触点机构和复位锁止件的断路装置和系统
CN2867577Y (zh) * 2006-02-15 2007-02-07 温州永泰电器有限公司 插座式接地故障断路器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1759513A (zh) * 2003-02-03 2006-04-12 莱维顿制造有限公司 利用电桥式触点机构和复位锁止件的断路装置和系统
CN2867577Y (zh) * 2006-02-15 2007-02-07 温州永泰电器有限公司 插座式接地故障断路器

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