CN2476095Y - Under-voltage trip - Google Patents

Abstract

The utility model provides a voltage losing release, comprising a releasing spring, an armature, a U shape iron core and an electromagnetic coil L. The electromagnetic coil L is sleeved and fixed on the U shape iron core. The utility model is characterized in that the electromagnetic coil consists of three windings. The dotted terminals of two windings among the three windings are connected. The third winding is connected between the different-name terminals of the two windings. The connection terminals of the three windings are correspondingly connected with the three-phase power. On the base of the existing release, the utility model improves the structure and wiring of the electromagnetic coil a little, thus the voltage losing release and phase lacking release are realized. If a control button is added, the branch-excitation release function can be realized, so the utility model is a multi-function voltage losing release.

Description

No-voltage release

The utility model provides a kind of no-voltage release, belongs to that voltage is lower than predetermined value and the protection switch technical field of moving.

Release is as a kind of protection switch, and its application is boundless.Existing release, its function is all more single, as Chinese patent communique disclosed utility model patent on August 5th, 1992: a kind of noiselessness undervoltage tripping device, it is characterized in that: form with the pull bar that is connected with the armature other end by being fixed on the back-moving spring on the support, the coil that a utmost point is equipped with charged source joint, the U sections core that another utmost point is connected with armature, rectifier diode is connected with power connection with the circuit series connection back of coil and fly-wheel diode parallel connection, and the pole-face that armature contacts with iron core is the plane.It adopts DC power supply is the solenoid power supply; save the short-circuited conducting sleeve on the core structure; advantage is to have eliminated electromagnetic noise; processing technology is simple; cost reduces; but it remains a kind of release of function singleness, can only realize that circuit does not have to press or voltage release action, breaker open operation when being reduced to certain value, and no longer have other defencive function.

The purpose of this utility model provides and a kind ofly can overcome above-mentioned defective, simple in structure, multiple functional no-voltage release.

The purpose of this utility model is achieved in that

Comprise retracting spring, armature, U sections core and solenoid, wherein the solenoid suit is fixed on the U sections core, it is characterized in that: solenoid is made up of three windings, wherein there is the end of the same name of two windings to join, the 3rd winding of serial connection between its different name end, the link correspondence of three windings connects three phase mains.

Described no-voltage release, serial connection one normally closed button L between arbitrary link of three windings is with connected phase power supply _A

Its operation principle is: on the basis of existing release, only change solenoid structure and with the annexation of three phase mains, when voltage just often, the electromagnetic attraction that solenoid produces is greater than the reaction force of retracting spring, armature is attracted on the U sections core, release is failure to actuate, and circuit breaker successfully closes a floodgate; Do not press or voltage when being reduced to certain value when circuit has, just less than the reaction force of retracting spring, armature discharges the electromagnetic attraction that solenoid produces, and release moves, breaker open operation; Lack arbitrary phase time in three phase mains, just less than the reaction force of retracting spring, armature discharges the magnetic attraction that solenoid produces, the release action, and circuit breaker is because of the phase shortage separating brake; If serial connection one normally closed button is possessing on the basis of above-mentioned functions on arbitrary terminals of solenoid, can realize long-range shunted exciter tripping operation by controlling normally closed button.

The utility model compared with prior art has following advantage: simple in structure, multiple functional.

Fig. 1 is the circuit diagram that the utility model solenoid is connected with three phase mains;

Fig. 2 is the circuit diagram that utility model is set up a normally closed button embodiment;

Below in conjunction with accompanying drawing the utility model is described further:

Among Fig. 1: suit is fixed on solenoid on the U sections core by three winding L _1～3Form, two winding L are wherein arranged _1～2End of the same name join, between its different name end the serial connection the 3rd winding L ₃, three winding L _1～3The link correspondence connect three phase mains.Like this when circuit does not have pressures, voltage is reduced to and lacks arbitrary phase time in certain value or the three phase mains, the electromagnetic attraction that solenoid L produces is just less than the reaction force of retracting spring, armature release, and release moves, breaker open operation.

Embodiment shown in Figure 2 is promptly on embodiment basis shown in Figure 1, in winding L _2～3The junction and connected A phase power supply between the serial connection one normally closed button L _A, increased the shunt opening function, press normally closed button L _A, make winding L _2～3The junction and A mutually power supply disconnect, the electromagnetic attraction of whole solenoid is less than the reaction force of retracting spring, armature discharges, the release action, breaker open operation is realized Long-distance Control.

Inventive point of the present utility model does not lie in the variation of mechanical connecting structure between the elements such as armature in the release, U sections core, retracting spring; but on the basis of original release; only change solenoid structure and with the annexation of three phase mains; and set up control switch accordingly; make it on the basis of original release simple function; have no-voltage trip, phase shortage dropout, shunted exciter tripping function, become no-voltage release with kinds of protect function.

Claims (2)

1, a kind of no-voltage release, comprise retracting spring, armature, U sections core and solenoid, wherein the solenoid suit is fixed on the U sections core, it is characterized in that: solenoid is made up of three windings, wherein there is the end of the same name of two windings to join, the 3rd winding of serial connection between its different name end, the link correspondence of three windings connects three phase mains.

2, no-voltage release as claimed in claim 1 is characterized in that: serial connection one normally closed button L between arbitrary link of three windings is with connected phase power supply _A

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