CN201392791Y - Molded case circuit breaker - Google Patents

Molded case circuit breaker Download PDF

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Publication number
CN201392791Y
CN201392791Y CN200920145218U CN200920145218U CN201392791Y CN 201392791 Y CN201392791 Y CN 201392791Y CN 200920145218 U CN200920145218 U CN 200920145218U CN 200920145218 U CN200920145218 U CN 200920145218U CN 201392791 Y CN201392791 Y CN 201392791Y
Authority
CN
China
Prior art keywords
circuit breaker
molded case
draw bar
case circuit
adjusting
Prior art date
Application number
CN200920145218U
Other languages
Chinese (zh)
Inventor
严剑峰
Original Assignee
浙江嘉凯电气有限公司
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 浙江嘉凯电气有限公司 filed Critical 浙江嘉凯电气有限公司
Priority to CN200920145218U priority Critical patent/CN201392791Y/en
Application granted granted Critical
Publication of CN201392791Y publication Critical patent/CN201392791Y/en

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Abstract

The utility model relates to a molded case circuit breaker, which comprises a drawbar and a bimetallic strip, wherein the drawbar is arranged on the frame of the molded case circuit breaker; the utility model is provided with an adjusting support arranged on the base of the molded case circuit breaker, wherein an adjusting knob is arranged on the adjusting support, and an adjusting plate connected with and driving the drawbar, wherein the adjusting knob connects with and drives the adjusting plate to slide left and right. A setting current adjustable mechanism is added to the utility model without lowering the performance of the product, therefore the molded case circuit breaker with un-adjustable rated current is changed to the adjustable circuit breaker with the rated current within the range of 0.8 to 1.0 In, which improves the performance-price ratio of the molded case circuit breaker greatly.

Description

Mold cased circuit breaker
Affiliated technical field
The utility model relates to a kind of mold cased circuit breaker, relates to the adjustable mold cased circuit breaker of a kind of rated current specifically.
Background technology
In distribution system, it is to determine according to technical indicators such as short circuit current maximum in the rated voltage in the circuit, load current and this circuit that the user selects the mold cased circuit breaker of which kind of model, specification for use.In case these indexs are determined, major parameter such as the rated operational current of its circuit breaker (In), rated operational voltage (Ue), specified short circuit breaking capacity (Icn), protection classification (power distribution protection and motor protection) and profile and installation dimension and index have also just been determined.In these indexs, the rated voltage of subscriber's line, maximum short circuit current, protection classification and product design and installation dimension can not change.And for big or small the determining of circuit breaker rated operational current (In), designing unit determines according to the line load electric current of field of employment maximum often.Yet the size of the line load electric current (Ie) of actual field of employment is a uncertain number, and its size changes with the variation of electric appliance load operating position.Therefore, big for the fixing mold cased circuit breaker of traditional load current value if its load current value selects, the delay protection characteristic inefficacy of circuit breaker be can cause and circuit or equipment burnt out.If it is little that its load current value selects, can cause the regular tripping operation of circuit breaker to make the equipment can't operate as normal.If selected for use to have the adjustable circuit breaker of rated current and just can address these problems, when the user drops into electrical appliance for a long time, rated current is transferred a little bigger, when user's less input electrical appliance, rated current can be turned down a little.It is less to have the adjustable circuit breaker of rated current now on the market, and the manufacturing cost height, fetch long price.
Summary of the invention
The purpose of this utility model provides the adjustable mold cased circuit breaker of a kind of rated current.
The utility model technical scheme that adopts of dealing with problems is:
A kind of mold cased circuit breaker, comprise draw bar, bimetal leaf, described draw bar is located on the described mold cased circuit breaker frame, it is characterized in that: have an adjusting support, described adjusting is propped up and is erected on the described mold cased circuit breaker base, and described adjusting support is provided with adjusting knob; Have an adjustable plate, described adjustable plate connection also drives described draw bar; Described adjusting knob in succession and drive described adjustable plate and horizontally slip.
The one side of described adjustable plate is a linear slope, and the another side of described adjustable plate is provided with boss, and described draw bar is provided with slotted hole, and described boss is stuck in the described slotted hole.
The operation principle of mold cased circuit breaker delayed release is: when mold cased circuit breaker passed through rated current (In), bimetal leaf is heated, and (caloric value was I 2Rt) bending, the shortage of heat that is produced when having enough gaps, bimetal leaf to pass to rated current (In) for a long time between bimetal leaf and the draw bar is so that bimetal leaf is bent to and promotes draw bar and rotate, and breaker mechanism can not move yet.When distribution line generation overload fault, electric current increases, the further heated bending of bimetallic sector-meeting, and this moment, draw bar was promoted by bimetal leaf through after certain time-delay, and draw bar rotates forward and makes circuit breaker tripping, has realized the overload protection to circuit and equipment.By above analysis as can be known, the circuit breaker that rated current is constant, if the gap between bimetal leaf and the draw bar dwindles, then its rated current will descend thereupon, utilizes this principle can realize that the rated current of described mold cased circuit breaker is adjustable.
The beneficial effects of the utility model: under the situation that does not reduce properties of product, increased the setting current adjustable mechanism, make mold cased circuit breaker by the non-adjustable interior adjustable circuit breaker of rated current (0.8~1.0) In scope that becomes of rated current, improved the cost performance of mold cased circuit breaker greatly.
Description of drawings
Fig. 1 is the utility model three-dimensional structure schematic diagram
Fig. 2 is the utility model vertical view
Fig. 3 is an A portion enlarged drawing among Fig. 2
Fig. 4 is the utility model governor motion structural representation
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Shown in Fig. 1,2,3,4, the utility model provides a kind of mold cased circuit breaker, comprises draw bar 1, bimetal leaf 2, and draw bar 1 is installed on the circuit breaker frame, under the effect of external force, can rotate forward behind the breaker closing, can drive operating mechanism during rotation and make breaker open operation.Regulate support 4 and be installed on the circuit breaker base, adjustable plate 3 one sides have three linear slope through Theoretical Calculation and verification experimental verification, and another side then has two boss 7, and adjustable plate 3 is stuck in the slotted hole 6 of draw bar 1 by boss 7, can horizontally slip.Adjusting knob 5 is installed in to be regulated on the support 4, can carry out the rotation of 180 degree, and the lower end of adjusting knob 5 is eccentric wheels 8, can rotate between two positive stop blocks 9 of adjustable plate 3.When adjusting knob 5 rotated, the eccentric wheel 8 of adjusting knob 5 drove adjustable plate 3 and slides, thereby utilized the inclined-plane on the adjustable plate 3 to reach the distance of regulating between draw bar 1 and the bimetal leaf 2.When adjusting knob 5 was transferred to high order end, this moment, draw bar 1 was nearest with bimetal leaf 2, and rated current is 0.8In.When adjusting knob 5 was transferred to the centre position, draw bar 1 was placed in the middle with bimetal leaf 2 distances, and rated current is 0.9In.When adjusting knob 5 is transferred to low order end, draw bar 1 and bimetal leaf 2 distances farthest, rated current is 1.0In.

Claims (2)

1, a kind of mold cased circuit breaker, comprise draw bar, bimetal leaf, described draw bar is located on the described mold cased circuit breaker frame, it is characterized in that: have an adjusting support, described adjusting is propped up and is erected on the described mold cased circuit breaker base, and described adjusting support is provided with adjusting knob; Have an adjustable plate, described adjustable plate connection also drives described draw bar; Described adjusting knob connects and drives described adjustable plate and horizontally slips.
2, a kind of mold cased circuit breaker according to claim 1 is characterized in that: the one side of described adjustable plate is a linear slope, and the another side of described adjustable plate is provided with boss, and described draw bar is provided with slotted hole, and described boss is stuck in the described slotted hole.
CN200920145218U 2009-03-12 2009-03-12 Molded case circuit breaker CN201392791Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200920145218U CN201392791Y (en) 2009-03-12 2009-03-12 Molded case circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200920145218U CN201392791Y (en) 2009-03-12 2009-03-12 Molded case circuit breaker

Publications (1)

Publication Number Publication Date
CN201392791Y true CN201392791Y (en) 2010-01-27

Family

ID=41599612

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200920145218U CN201392791Y (en) 2009-03-12 2009-03-12 Molded case circuit breaker

Country Status (1)

Country Link
CN (1) CN201392791Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102110556A (en) * 2011-02-25 2011-06-29 贵州长征开关制造有限公司 Overload setting value-adjustable circuit breaker
CN102683124A (en) * 2011-03-10 2012-09-19 北京正北元电器有限公司 Overload alarm non-tripping device of thermomagnetic plastic housing circuit breaker
CN103295813A (en) * 2013-06-30 2013-09-11 贵州华阳电工有限公司 Bidirectional independent adjustable switch support mechanism
CN103474303A (en) * 2013-08-13 2013-12-25 德力西电气有限公司 Molded case circuit breaker with hinged draw bar
CN105390350A (en) * 2015-12-08 2016-03-09 上海电科电器科技有限公司 Overload long-delay protection mechanism
CN106206199A (en) * 2016-09-26 2016-12-07 常熟开关制造有限公司(原常熟开关厂) The trip gear of low-voltage circuit breaker

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102110556A (en) * 2011-02-25 2011-06-29 贵州长征开关制造有限公司 Overload setting value-adjustable circuit breaker
CN102683124A (en) * 2011-03-10 2012-09-19 北京正北元电器有限公司 Overload alarm non-tripping device of thermomagnetic plastic housing circuit breaker
CN103295813A (en) * 2013-06-30 2013-09-11 贵州华阳电工有限公司 Bidirectional independent adjustable switch support mechanism
CN103295813B (en) * 2013-06-30 2015-11-18 贵州华阳电工有限公司 Two-way independent adjustable switch support mechanism
CN103474303A (en) * 2013-08-13 2013-12-25 德力西电气有限公司 Molded case circuit breaker with hinged draw bar
CN103474303B (en) * 2013-08-13 2015-12-16 德力西电气有限公司 A kind of breaker of plastic casing with hinge-type draw bar
CN105390350A (en) * 2015-12-08 2016-03-09 上海电科电器科技有限公司 Overload long-delay protection mechanism
CN106206199A (en) * 2016-09-26 2016-12-07 常熟开关制造有限公司(原常熟开关厂) The trip gear of low-voltage circuit breaker

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100127

Termination date: 20130312