CN201773801U

CN201773801U - Novel under-voltage tripper

Info

Publication number: CN201773801U
Application number: CN2010202575852U
Authority: CN
Inventors: 邹城华; 李巍; 卢权胜; 王兴仙
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2010-07-08
Filing date: 2010-07-08
Publication date: 2011-03-23
Anticipated expiration: 2020-07-08

Abstract

The utility model relates to a novel under-voltage tripper, which comprises a housing, a tripping mechanism, a coil, a movable iron core, a spring and an internal control circuit, wherein the internal control circuit is arranged in the housing and comprises an AC power supply access E1 and an AC power supply access E2, a resistor R1, a rectifier bridge D1, a bipolar transient voltage suppressor D2, a DC output end A1 and a DC output end A2; and in the novel internal control circuit structure, and the resistor and the transient voltage suppressor are used for protecting the rectifier bridge, so that the current output fluctuation range of the rectifier bridge is small, and the coil action is stable.

Description

Novel under-voltage release

Technical field

The utility model relates to the under voltage protection field, relates generally to a kind of under-voltage release.

Background technology

Various electric operations in the life need suitable voltage, and overvoltage and under voltage all can influence the useful life of electrical equipment, even cause various accidents.When undertension, the operation principle of under-voltage release is: under-voltage release is when its terminal voltage is reduced to a certain prescribed limit, make circuit breaker that a kind of release of delaying time or not having the time-delay disconnection be arranged, when supply voltage descends (even slowly descending) in 70% to 35% scope of rated operational voltage, under-voltage release should operate, under-voltage release equals 35% o'clock of release rated operational voltage at supply voltage, and under-voltage release should be able to prevent that circuit breaker closing is complete; When supply voltage is equal to or greater than the rated operational voltage of 85% under-voltage release, under hot condition, should be able to guarantee that circuit breaker is reliably closed.Therefore, when certain voltage drop takes place supply voltage in the protected circuit, can cut off the electricity supply by the automatic disconnection circuit breaker damage that makes following load appliance of this circuit breaker or electric equipment avoid under voltage.During use, the under-voltage release coil is connected on the circuit breaker electric source, and after the under-voltage release energising, circuit breaker could close a floodgate, otherwise circuit breaker closes not brake application.

The existing circuit breaker internal control circuit only carries out rectification with a rectifier bridge, and the pick-up voltage fluctuation range is bigger, exceeds the prescribed limit of national standard, causes the under-voltage release operating characteristics stable inadequately.

The utility model content

In order to address the above problem, the utility model provides that a kind of scope range of the fluctuation of voltage is little, operating characteristics stable, safer reliable novel under-voltage release.

The technical solution adopted in the utility model is: a kind of novel under-voltage release, comprise shell, tripping mechanism, coil, moving iron core, spring, also comprise an internal control circuit, described internal control circuit is located in the shell, it is characterized in that: described internal control circuit comprises AC power access port E1, E2, comprises resistance R 1, rectifier bridge D1, bipolarity Transient Suppression Diode D2 and dc output end A1, A2;

Described AC power access port E1 is connected with resistance R 1 one ends, and resistance R 1 other end is connected with bipolarity Transient Suppression Diode D2 one end with rectifier bridge D1 first input end;

Described AC power access port E2 is connected with the bipolarity Transient Suppression Diode D2 other end and rectifier bridge D1 second input;

Described rectifier bridge D1 positive output end is connected with dc output end A1, and rectifier bridge D1 negative output terminal is connected with dc output end A2, and dc output end A1, A2 are connected with the coil two ends respectively.

Technical advantage of the present utility model is: adopt resistance and Transient Suppression Diode protection rectifier bridge, make that the electric current output pulsation scope of rectifier bridge is little, coil motion is stable.

Below accompanying drawing is combined with embodiment, further describe the present invention.

Description of drawings

Fig. 1 is the present embodiment overall schematic

Fig. 2 is a present embodiment internal control circuit electrical schematic diagram

Fig. 3 is present embodiment circuit PCB figure

Concrete enforcement

With reference to figure 1, this novel under-voltage release comprises shell 1, armature 2, coil 3, wiring board 4, reset button 5, tripping mechanism 6, moving iron core 7, spring 8; All parts are located in the shell 1, wiring board 4 is provided with internal control circuit, internal control circuit is connected with AC power by the power interface on the shell, the internal control circuit dc output end is connected with Inside coil 3, when voltage during less than normal operation of circuit breaker voltage, the internal control circuit output current is little, can't overcome spring 8 elastic force, cause circuit breaker to disconnect, voltage is in the normal operation of circuit breaker voltage range time, and coil 3 attractions are enough big, make iron core 7 adhesives, tripping mechanism is resetted, cause breaker closing.The hand-reset when effect of reset button 5 is the under-voltage release fault.

With reference to figure 2, Fig. 3, introduce the concrete operation principle of internal control circuit, internal control circuit connects AC power by access port E1, E2; Resistance R 1 and rectifier bridge D1 series connection, resistance R 1 plays the dividing potential drop current limliting, protection core parts rectifier bridge D1; Bipolarity Transient Suppression Diode D2 is in parallel with rectifier bridge D1, when rectifier bridge D1 both end voltage during near its maximum withstand voltage, bipolarity Transient Suppression Diode D2 punctures, bipolarity Transient Suppression Diode D2 and resistance R 1 constitute the loop, rectifier bridge D1 no longer switches on, thereby effectively protect rectifier bridge D1, so the puncture voltage of bipolarity Transient Suppression Diode D2 will be lower than the maximum withstand voltage of rectifier bridge D1, because wiring board adopts AC power, so bipolarity Transient Suppression Diode D2 selects ambipolar TVS pipe for use, can two-way admittance; Alternating current is rectified into direct current through rectifier bridge D1, by dc output end A1, A2 switch-on coil, makes device for under-voltage releasing equipment action message in the voltage range of regulation.

Respectively be technical staff's notice; though the utility model is further described according to the foregoing description; but invention thought of the present utility model is not limited only to present embodiment, if be based on the variation of invention thought of the present utility model, all in the utility model protection range.

Claims

1. novel under-voltage release, comprise shell, tripping mechanism, coil, moving iron core, spring, also comprise an internal control circuit, described internal control circuit is located in the shell, it is characterized in that: described internal control circuit comprises AC power access port E1, E2, comprises resistance R 1, rectifier bridge D1, bipolarity Transient Suppression Diode D2 and dc output end A1, A2;

Described AC power access port E2 is connected with the other end and rectifier bridge D1 second input of bipolarity Transient Suppression Diode D2;

Described rectifier bridge D1 positive output end is connected with dc output end A1, and rectifier bridge D1 negative output terminal is connected with dc output end A2; Dc output end A1, A2 are connected with the coil two ends respectively.