CN202230965U

CN202230965U - Overvoltage protection type minisize breaker with width of 36 mm

Info

Publication number: CN202230965U
Application number: CN2011200609990U
Authority: CN
Inventors: 李晨阳
Original assignee: BEIJING BURTON ELECTRIC Co Ltd
Current assignee: BEIJING BURTON ELECTRIC Co Ltd
Priority date: 2011-03-10
Filing date: 2011-03-10
Publication date: 2012-05-23
Anticipated expiration: 2021-03-10

Abstract

The utility model relates to an overvoltage protection type minisize breaker with a width of 36 mm, which can be used in places like homes, and integrates the functions of short circuit protection, overload protection and overvoltage protection therein, wherein the width of the breaker is only 36 mm, the L electrode portion of the breaker is a body portion, and the breaker can perform short circuit protection and overload protection on circuits through an electromagnetic system and a thermal release system, the N electrode portion of the breaker is a release portion for overvoltage protection, and the release portion mainly comprises a release mechanism and an electronic circuit board. When the electronic circuit board detects an overvoltage fault, an iron core in a circuit board coil is driven to extend towards left under the action of a solenoid force, to trigger the mechanism and further to trigger a linkage shaft at the L electrode side, such that the whole breaker is disconnected, and the overvoltage protection function of the breaker is realized; and the test button of the N electrode side is pressed, such that the reliability of the overvoltage motion of the breaker can be verified.

Description

Width is the overvoltage protection type miniature circuit breaker of 36mm

Technical field

The field is the low-voltage electrical apparatus field under the utility model, is that a kind of family expenses and similar site use short circuit, overload, three kinds of defencive functions of the overvoltage circuit breaker as one, and the width of circuit breaker is 36mm.

Background technology

The first item of 7.6.1 regulation in " the civil buildings electrical design standard " implemented on August 1st, 2008: low-voltage distributing line should act on and cut off power supply or send alarm signal according to different faults classification and concrete engine request installing short-circuit protection, overload protection, earth fault protection, overvoltage and under voltage protection.This prescribed specific low-voltage distributing line need increase overvoltage protection.At present, the producer that produces circuit breaker is in order to realize over-voltage protection function, employing be that the pattern of overvoltage release and circuit breaker assembly unit realizes.This realization pattern takies very big cabinet space for a moment, and two can make the mode of connection very complicated, and three meetings increase various costs, four meeting spent materials, and the waste resource, therefore also impracticable.

Summary of the invention

In order to solve the deficiency that existing circuit breaker assembly unit overvoltage annex causes aspects such as width is big, wiring is complicated, increase cost, waste resource; The utility model provides a kind of overpressure-proof type miniature circuit breaker; This circuit breaker is two moduluses wide (36mm) only; But have short-circuit protection, overload protection, three kinds of functions of overvoltage protection, and can test the reliability of circuit breaker overvoltage action through test button.

The utility model solves the technical scheme that its technical problem adopted: adopt the wide insulation crust of 36mm, be made up of two parts, L utmost point part and N utmost point part.The L utmost point of circuit breaker partly is the body part of circuit breaker, realizes short-circuit protection and overload protection function to circuit respectively through electromagnetic system and hot tripping system.The N utmost point side of circuit breaker is the dropout part of overvoltage protection; The mechanism and the electronic circuit board of realizing over-voltage protecting function that mainly comprise dropout; Three interfaces on the electronic circuit board weld conducting strip, test loop conducting strip and the N utmost point lead-in wire of the L utmost point respectively, to obtain voltage.When electronic circuit board detects circuit and the overvoltage fault occurs; Will impel the iron core in the electronic circuit board coil under the effect of screwed pipe power, to hit left, actuating mechanism, and then touch the universal driving shaft of L utmost point side; Make whole circuit breaker disjunction; So just make whole circuit breaker realize over-voltage protection function, press the test button of N utmost point side equally, can verify the reliability of circuit breaker overvoltage action.In addition, clear and definite wiring sign is arranged, as long as just passable on the circuit breaker by normal L line and the wiring of N line.

The beneficial effect of the utility model is that circuit breaker has short-circuit protection, overload protection, three kinds of functions of overvoltage protection simultaneously, and width has only 36mm, has realized the characteristics that the little function of volume is many, has made things convenient for manufacturer and user biglyyer.

Description of drawings

Fig. 1 is the outline drawing of the utility model circuit breaker;

Fig. 2 is the structural representation of the utility model circuit breaker L utmost point side;

Fig. 3, Fig. 4 are the structural representations of the utility model circuit breaker N utmost point side.

Embodiment

Fig. 1 is the outline drawing of circuit breaker, width dimensions 36mm.Fig. 2 is a circuit breaker L utmost point side structure sketch map, and L utmost point side mainly is made up of handle (30), electromagnetic system (27), hot tripping system (37), arc control device (26), trip link (36).After the close handles (30), the fixed contact in moving contact in the hot tripping system (37) and the electromagnetic system (27) is connected, and behind the disjunction handle (30), dynamic and static contact breaks off, and circuit breaker is in trip status.Hot tripping system comprises tripping mechanism in (37), and when short trouble appearred in circuit, the dynamic and static iron core adhesive in the electromagnetic system (27) impelled push rod to eject, and touches the tripping in the hot tripping system (37), thereby makes circuit breaker tripping, plays the effect of short-circuit protection; When overload fault appearred in circuit, the bimetal leaf in the hot tripping system (37) was crooked to the right, stirs trip link (36) simultaneously, makes circuit breaker tripping thereby stir tripping, plays the effect of overload protection; The effect of arc control device (26) is that the electric arc that the circuit breaker disjunction produces is extinguished protective circuit breaker itself rapidly.

Fig. 3, Fig. 4 are circuit breaker N utmost point side structure sketch map.The N utmost point side of circuit breaker mainly is made up of N utmost point fixed contact contact group (1), N utmost point moving contact contact group (3), electronic circuit board (23), guard shield (12), spring leaf (9), tripping mechanism (comprising 7,13,14,15,16,17,18,19), tripping button spring (8), test button (11).Three interfaces of electronic circuit board (24) are firm with the wire bonds that N utmost point moving contact contacts in the group (3) with conducting strip (10), conducting strip (22) respectively.After the close handles (30); Moving contact in the N utmost point moving contact contact group (3) contacts group (1) fixed contact and connects with N utmost point fixed contact; This connection will be prior to the connection of the dynamic and static contact of L utmost point side, and when connecting, spring leaf (9) is connected with the conducting strip in the electromagnetic system (27); Thereby give electronic circuit board (23) power supply, make it have over-voltage protection function.Behind the disjunction handle, the moving contact in the N utmost point moving contact contact group (3) contacts group (1) fixed contact and breaks off with N utmost point fixed contact, and this breaks off wants the back in the disconnection of the dynamic and static contact of L utmost point side, and simultaneously, the conducting strip in spring leaf (9) and the electromagnetic system (27) breaks off.In use, when occurring the overvoltage fault in the circuit, the iron core (20) in electronic circuit board (23) coil hits left under the effect of screwed pipe power; Touch push rod (15); Push rod (15) touches dropout part (18), then makes tripping (13) action, and tripping (13) touches the universal driving shaft on the hot tripping system (37); Make circuit breaker tripping, played the overvoltage protection effect.

Claims

1. the overvoltage protection type miniature circuit breaker that width is 36mm is made up of two parts, i.e. L utmost point part and N utmost point part is characterized in that:

The L utmost point of circuit breaker is a body part partly, has short circuit, overload protection function;

The N utmost point of circuit breaker partly for overvoltage action dropout part, forms interlock with body part, realizes the over-voltage protection function of circuit breaker.