CN101651071B - Electric control breaker with short circuit self-locking function - Google Patents

Electric control breaker with short circuit self-locking function Download PDF

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Publication number
CN101651071B
CN101651071B CN2008100487801A CN200810048780A CN101651071B CN 101651071 B CN101651071 B CN 101651071B CN 2008100487801 A CN2008100487801 A CN 2008100487801A CN 200810048780 A CN200810048780 A CN 200810048780A CN 101651071 B CN101651071 B CN 101651071B
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China
Prior art keywords
circuit
self
electromagnet
breaker
control circuit
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Expired - Fee Related
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CN2008100487801A
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Chinese (zh)
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CN101651071A (en
Inventor
万家盛
汪志强
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Hubei Shengjia Wiring Co Ltd
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Hubei Shengjia Wiring Co Ltd
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Priority to CN2008100487801A priority Critical patent/CN101651071B/en
Publication of CN101651071A publication Critical patent/CN101651071A/en
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Publication of CN101651071B publication Critical patent/CN101651071B/en
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Abstract

The invention relates to an electric control breaker with short circuit self-locking function, which is characterized in that: the breaker is provided with a short circuit self-locking mechanism. Because the breaker is provided with the short circuit self-locking mechanism, the breaker cannot be directly closed after the breaker is off due to a short circuit so as to remind an operator that a short circuit fault is happened and that the breaker can be closed again after causes are found and problems are solved. Under the condition of maintaining all functions of the prior breaker, the breaker additionally has the short circuit self-locking function to overcome the defect that the breaker after the short circuit is closed again to cause breaker burning or fire disasters in the prior art.

Description

Electric-controlled type has the circuit breaker of short circuit self-locking function
Technical field
The invention belongs to a kind of low-voltage electrical apparatus, is the circuit breaker that a kind of electric-controlled type has short circuit self-locking function specifically.
Background technology
Mainly be to constitute (Fig. 1) at the circuit breaker (being commonly called as air switch) that uses at present by shell, operating grip, self-locking gangbar, dropout linkage, movement arm and operating point (contact); Its course of work is: the manipulation operations handle makes the self-locking gangbar drive the movement arm motion; The contact is linked to each other with the sheet metal of output accomplish the switch closure process, the gangbar of self-locking simultaneously cooperates with the dropout linkage accomplishes closed self-locking (Fig. 2).For circuit is protected; In existing circuit breaker, also be provided with overcurrent action Agency And sheet metal protection mechanism; Its course of work is: when the electric current that flows through circuit breaker surpasses the current ratings certain value; The lower end that overcurrent coil in the overcurrent actuating mechanism makes the actuating strut action of overcurrent actuating mechanism push the dropout linkage is rotated the dropout linkage, and the self-locking gangbar breaks away from the dropout linkage and accomplishes circuit breaker and break off, and reaches the purpose of protection; The course of work of bimetal leaf protection mechanism is: when the electric current that flows through circuit breaker surpasses the current ratings certain value; Make bi-metal plate deformed and touch the rotation of dropout linkage; The self-locking gangbar breaks away from the dropout linkage and accomplishes circuit breaker and break off, and reaches the purpose of protection.But after circuit breaker broke off, the actuating strut of its overcurrent actuating mechanism or bimetallic sector-meeting recovered reset condition; When if load is short-circuited; Though above-mentioned circuit breaker can be accomplished overcurrent protection, still exist need not to find out circuit breaker disconnect cause (because operating personnel do not know the overcurrent protection short circuit) close circuit breaker once more, to such an extent as to burn circuit breaker or cause the defective of fire; This type of picture accident repeatedly has been shown in medium.
Summary of the invention
The purpose of this invention is to provide a kind of when circuit is short-circuited; After circuit breaker breaks off; Must carry out reset operation (is short circuit to remind the operator) again the electric-controlled type of close circuit breaker have the circuit breaker of short circuit self-locking function, to overcome the defective of burning circuit breaker in the prior art or causing fire.
To achieve these goals; The present invention is provided with short-circuit self-locking mechanism in circuit breaker; Short-circuit self-locking mechanism comprises self-locking mechanism and resetting device, and its self-locking mechanism is the mechanism that control dropout linkage keeps the overcurrent protection state, and its resetting device is to make the dropout linkage recover the mechanism of reset condition; Be characterized in: self-locking mechanism is made up of electromagnet, a control circuit for electromagnet that is arranged in the case for circuit breaker, and electromagnet is connected with the control circuit for electromagnet line; Resetting device is connected and composed by a shift knob and control circuit for electromagnet line, and wherein the movement arm of electromagnet contacts with the upper end of dropout linkage in the circuit breaker.Said control circuit for electromagnet is made up of transducer and the automatically controlled self-locking control circuit of transducer, the current status of sensor circuit breaker inside conductor, and the output of transducer is connected with the automatically controlled self-locking control circuit of transducer.
Above-mentioned control circuit for electromagnet is by tongue tube and tongue tube is automatically controlled constitutes from lock control circuit, and electromagnet is connected from the lock control circuit line with tongue tube and tongue tube are automatically controlled, and tongue tube is arranged on by the circuit breaker inside conductor.
Above-mentioned control circuit for electromagnet is by instrument transformer and instrument transformer is automatically controlled constitutes from lock control circuit, and instrument transformer passes the circuit breaker inside conductor, and the output of instrument transformer is connected from lock control circuit with instrument transformer is automatically controlled.
Because the present invention is provided with short-circuit self-locking mechanism in circuit breaker; Make the present invention after the circuit breaker that is short-circuited breaks off phenomenon; Direct close circuit breaker, reminding operator's accident that is short-circuited, close circuit breaker again after should ascertaining the reason and deal with problems.The present invention has increased short circuit self-locking function keeping under the situation of original circuit breaker all functions, thus overcome in the prior art because of after the short circuit again close circuit breaker cause the defective of burning circuit breaker or causing fire.
Description of drawings
Fig. 1 is present circuit breaker off-state structural representation.
Fig. 2 is present breaker closing status architecture sketch map.
Fig. 3 is the embodiment of the invention 1 a closure state structural representation.
Fig. 4 is the embodiment of the invention 1 a self-locking state structural representation.
Fig. 5 is the embodiment of the invention 2 closure state structural representations.
Fig. 6 is the embodiment of the invention 2 self-locking state structural representations.
Fig. 7 is the stereogram of the embodiment of the invention 2.
Fig. 8 is automatically controlled from the lock control circuit schematic diagram for tongue tube of the present invention.
Fig. 9 is automatically controlled from the lock control circuit schematic diagram for instrument transformer of the present invention.
Among the figure: 1-shell, 2-operating grip, 3-self-locking gangbar, 4-dropout linkage, 5-overcurrent actuating mechanism, 6-bimetal leaf, 7-movement arm, 8-operating point, 9-shift knob, 10-electromagnet, 11-electromagnet movement arm, 12-tongue tube, 13-instrument transformer, 14-control circuit.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.
The present invention is under the situation that keeps former breaker structure constant (all functions are constant); A short-circuit self-locking mechanism is set in circuit breaker in addition to be constituted; Short-circuit self-locking mechanism comprises self-locking mechanism and resetting device; Its self-locking mechanism is the mechanism that control dropout linkage keeps the overcurrent protection state, and its resetting device is to make the dropout linkage recover the mechanism of reset condition.
Embodiment 1:
Self-locking mechanism of the present invention is arranged on by one that electromagnet, tongue tube and tongue tube in the case for circuit breaker is automatically controlled to be constituted from lock control circuit (Fig. 8); Electromagnet is connected from the lock control circuit line with tongue tube and tongue tube are automatically controlled; Resetting device is made up of a shift knob; Tongue tube is arranged on by the circuit breaker inside conductor, wherein the movement arm of electromagnet contact with the upper end of dropout linkage in the circuit breaker (Fig. 3).
The operation principle of present embodiment is: when circuit breaker was short-circuited, the rated current owing to be much higher than circuit breaker through the electric current in the circuit breaker inside conductor produced high-intensity magnetic field around the lead; Make the other tongue tube adhesive of lead, tongue tube is automatically controlled from lock control circuit work, and magnet spool gets; The movement arm action of electromagnet; Movement arm promotes the dropout linkage and rotates (circuit breaker being broken off with the overcurrent actuating mechanism), and remains on trip status and can not recover, thereby makes and both made the closed procedure handle; Can not make breaker closing, and accomplish short circuit self-locking (Fig. 4).Recovery operation if desired only need press the button, makes automatically controlledly to quit work from lock control circuit work, and the magnet spool outage, the movement arm of electromagnet recovers, and the gangbar of promptly threading off is recovered, and just closed procedure handle once more makes breaker closing.
Embodiment 2:
Self-locking mechanism of the present invention is arranged on by one that electromagnet, instrument transformer and instrument transformer in the case for circuit breaker is automatically controlled to be constituted from lock control circuit (Fig. 9); Resetting device is made up of a shift knob; Instrument transformer passes the circuit breaker inside conductor; The output of instrument transformer is connected from lock control circuit with instrument transformer is automatically controlled, wherein the movement arm of electromagnet contact with the upper end of dropout linkage in the circuit breaker (Fig. 5).
From the circuit theory diagrams difference of lock control circuit, other principles are identical with embodiment 1 except that automatically controlled for the operation principle of present embodiment.
Tongue tube of the present invention is automatically controlled to be made up of power circuit, comparison circuit, latching circuit, reset circuit and controlling output circuit from lock control circuit (Fig. 8); Its power circuit is made up of diode D1-D4, resistance R 1, RB2, R3, capacitor C 1, IC 1; Comparison circuit is made up of resistance R 4, R5, variable resistor W IC 2; Latching circuit is made up of diode D6; Reset circuit is made up of sensitive switch REST, and controlling output circuit is made up of capacitor C 3, resistance R 6, triode Q, diode D5, electromagnet coil XQ.When the circuit failed because, around conductor, can produce powerful magnetic field, tongue tube NS is by the adhesive conducting; Voltage is input to the in-phase input end of comparison circuit through dry reed tube NS and the reference voltage of comparison circuit inverting input compares, and the output high potential drives triode Q conducting, and this high potential makes the circuit self-locking through the in-phase input end that diode D6 feeds back to comparator simultaneously; All the time be in high potential state; The electromagnet action promotes transmission mechanism threads off switch, cuts off the electricity supply, and has only through pressing the REST switch to make the output of comparator become electronegative potential; Triode is failure to actuate by electromagnet, and circuit breaker could close a floodgate.
Instrument transformer of the present invention automatically controlled from lock control circuit (Fig. 9) by power circuit, comparison circuit, short-circuit detecting circuit, latching circuit; Release circuit and controlling output circuit constitute; Its power circuit is made up of diode D1-D4, resistance R 1, RB2, R3, capacitor C 1, IC 1; Comparison circuit is made up of resistance R 4, R5, variable resistor W IC 2; Latching circuit is made up of diode D6, and release circuit is made up of sensitive switch REST, and controlling output circuit is made up of capacitor C 3, resistance R 6, triode Q, diode D5, electromagnet coil XQ.Its principle is: when the circuit failed because; Transformer inducedly go out voltage relatively through the reference voltage of the in-phase input end that is input to comparison circuit after capacitor C 2 filtering and the diode D7 rectification and comparison circuit inverting input, output high potential driving triode Q conducting, this high potential makes the circuit self-locking through the in-phase input end that diode D6 feeds back to comparator simultaneously; All the time be in high potential state; The electromagnet action promotes transmission mechanism threads off switch, cuts off the electricity supply, and has only through pressing the REST switch to make the output of comparator become electronegative potential; Triode is failure to actuate by electromagnet, and circuit breaker could close a floodgate.
The present invention also can be set to conventional overcurrent by short circuit current, accomplishes the overcurrent self-locking, makes the present invention be transformed into a kind of circuit breaker with overcurrent self-locking function.
The content of not doing in this specification to describe in detail belongs to this area professional and technical personnel's known prior art.

Claims (5)

1. an electric-controlled type has the circuit breaker of short circuit self-locking function; In circuit breaker, be provided with short-circuit self-locking mechanism; Short-circuit self-locking mechanism comprises self-locking mechanism and resetting device, and self-locking mechanism is the mechanism that control dropout linkage keeps the overcurrent protection state, and its resetting device is to make the dropout linkage recover the mechanism of reset condition; Self-locking mechanism is made up of electromagnet, a control circuit for electromagnet that is arranged in the case for circuit breaker, and electromagnet is connected with the control circuit for electromagnet line; Resetting device is connected and composed by a shift knob and control circuit for electromagnet line; Wherein the movement arm of electromagnet contacts with the upper end of dropout linkage in the circuit breaker; It is characterized in that: control circuit for electromagnet is made up of transducer and the automatically controlled self-locking control circuit of transducer; The current status of sensor circuit breaker inside conductor, the output of transducer is connected with the automatically controlled self-locking control circuit of transducer.
2. electric-controlled type as claimed in claim 1 has the circuit breaker of short circuit self-locking function; It is characterized in that: transducer is a tongue tube; Control circuit for electromagnet is by tongue tube and tongue tube is automatically controlled constitutes from lock control circuit; Electromagnet is connected from the lock control circuit line with tongue tube and tongue tube are automatically controlled, and tongue tube is arranged on by the circuit breaker inside conductor.
3. electric-controlled type as claimed in claim 2 has the circuit breaker of short circuit self-locking function; It is characterized in that: tongue tube is automatically controlled to be made up of power circuit, comparison circuit, latching circuit, reset circuit and controlling output circuit from lock control circuit; Its power circuit is made up of diode D1-D4, resistance R 1, R2, R3, capacitor C 1, IC 1; Comparison circuit is made up of resistance R 4, R5, variable resistor W, IC 2; Latching circuit is made up of diode D6, and reset circuit is made up of sensitive switch REST, and controlling output circuit is made up of capacitor C 3, resistance R 6, triode Q, diode D5, electromagnet coil XQ.
4. electric-controlled type as claimed in claim 1 has the circuit breaker of short circuit self-locking function; It is characterized in that: transducer is an instrument transformer; Control circuit for electromagnet is by instrument transformer and instrument transformer is automatically controlled constitutes from lock control circuit; Electromagnet is connected from lock control circuit with instrument transformer and instrument transformer are automatically controlled, and instrument transformer passes the circuit breaker inside conductor.
5. electric-controlled type as claimed in claim 4 has the circuit breaker of short circuit self-locking function; It is characterized in that: instrument transformer is automatically controlled to be made up of power circuit, comparison circuit, latching circuit, release circuit and controlling output circuit from lock control circuit; Its power circuit is made up of diode D1-D4, resistance R 1, R2, R3, capacitor C 1, IC 1; Comparison circuit is made up of resistance R 4, R5, variable resistor W, IC 2; Latching circuit is made up of diode D6, and release circuit is made up of sensitive switch REST, and controlling output circuit is made up of capacitor C 3, resistance R 6, triode Q, diode D5, electromagnet coil XQ.
CN2008100487801A 2008-08-12 2008-08-12 Electric control breaker with short circuit self-locking function Expired - Fee Related CN101651071B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008100487801A CN101651071B (en) 2008-08-12 2008-08-12 Electric control breaker with short circuit self-locking function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008100487801A CN101651071B (en) 2008-08-12 2008-08-12 Electric control breaker with short circuit self-locking function

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CN101651071A CN101651071A (en) 2010-02-17
CN101651071B true CN101651071B (en) 2012-07-04

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105513915B (en) * 2016-02-15 2017-09-12 佳一电气有限公司 A kind of intelligent breaker combination unit
CN105632846B (en) * 2016-03-15 2017-11-24 佳一电气有限公司 A kind of circuit breaker actuating mechanism
CN109659203A (en) * 2018-12-24 2019-04-19 厦门宏发开关设备有限公司 A kind of miniature circuit breaker abnormal protection device and miniature circuit breaker

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