CN209298050U - A kind of surge back-up protection device - Google Patents

Abstract

The utility model discloses a kind of surge back-up protection device; including breaker body; end of incoming cables, leading-out terminal, tripping mechanism and short-circuit protection coil on the breaker body are set; the tripping mechanism and the short-circuit protection coil are sequentially connected in series between the end of incoming cables and the leading-out terminal, constitute major loop, and the short-circuit protection coil can control the tripping mechanism tripping；Can be by the fracture of over-voltage breakdown it is characterized in that, being equipped on the major loop, an overcurrent coil also in parallel between the end of incoming cables and the leading-out terminal, the overcurrent coil can control the tripping mechanism tripping.The utility model is not necessarily to as the prior art, it is necessary to reach overload or short circuit current is just protected, fever caused by deteriorating because of surge protector is effectively avoided to cause fire.

Description

A kind of surge back-up protection device

Technical field

The utility model relates to breaker technical field more particularly to a kind of surge back-up protection devices.

Background technique

The protector of present surge protector front end generally uses miniature circuit breaker or fuse to protect.When surge is protected Tripping protection device and major loop contact when shield device shorted to earth or overload, the surge protector of isolated fault.As shown in Figure 1, It is a kind of existing surge back-up protection device, comprising: end of incoming cables 01, leading-out terminal 02, and it is connected to 01 He of end of incoming cables in turn Coil 03 and deformable metal 04 between leading-out terminal 02, the coil 03 are used to realize short-circuit tripping, and the deformable metal 04 is used To realize thermal tripping.

But cause short circuit or the breakdown of overload seldom in reality, surge protector mainly generates deterioration and causes absolutely under overvoltage Edge reduces generation leakage this electric current of circuit and there was only several amperes, and the electric current of overload or short circuit, therefore breaker or molten is far not achieved Disconnected device will not be protected, but this several amperes electric current due to resistance it is very big, fever is very serious, causes to catch fire.In fact many electronic boxs Fire is all caused in this way, that is to say, that there is protection blind spot in the breaker or fuse of existing protection surge protector, Fire caused by generating heat due to surge protector deterioration is not protected.

Summary of the invention

Aiming at the problems existing in the prior art, the purpose of this utility model is to provide one kind to effectively prevent because product is bad Change the surge back-up protection device that fever causes fire.

To achieve the above objectives, the utility model adopts the following technical solution.

End of incoming cables on the breaker body, outlet is arranged in a kind of surge back-up protection device, including breaker body End, tripping mechanism and short-circuit protection coil, the tripping mechanism and the short-circuit protection coil are sequentially connected in series in the end of incoming cables Between the leading-out terminal, major loop is constituted, the short-circuit protection coil can control the tripping mechanism tripping；Its feature exists In being equipped on the major loop can be by the fracture of over-voltage breakdown, the also parallel connection one between the end of incoming cables and the leading-out terminal A overcurrent coil, the overcurrent coil can control the tripping mechanism tripping.

As a further illustration of the above scheme, the spacing of the fracture two sides is 0.3 ± 0.03mm.

As a further illustration of the above scheme, being respectively equipped with electric discharge plate in the two sides of the fracture.

As a further illustration of the above scheme, the peace of the number of ampere turns of the overcurrent coil and the short-circuit protection coil The number of turns is identical.

As a further illustration of the above scheme, the setting electric current of the overcurrent coil is 3A.

As a further illustration of the above scheme, being equipped on the breaker body makes the tripping mechanism resume contacts Combined floodgate spanner.

As a further illustration of the above scheme, being equipped with arc-chute and arc extinguishing magnetic blow-out plate, structure on the breaker body At arc-control device, for eliminating the electric arc generated when the tripping mechanism separates.

The beneficial effects of the utility model are:

By the way that fracture is arranged, it is ensured that electric current preferentially flows through overcurrent coil；When overvoltage passes through major loop, fracture can be hit Electric discharge is worn, surge protector is allowed to play a role, it is ensured that overcurrent protection coil is not damaged because of surge；When surge protector exists When the Leakage Current generated under power-frequency voltage is more than the setting electric current of overcurrent coil, tripping mechanism separating brake is driven, protection is played and makees With；Since this body structure determines by overcurrent coil for the setting electric current of overcurrent coil, facilitates user independently to select, such as 3A, be not necessarily to As the prior art, it is necessary to reach overload or short circuit current is just protected, effectively avoid causing because surge protector deteriorates Fever cause fire.

Detailed description of the invention

Fig. 1 show existing surge back-up protection device structural schematic diagram, and arrow represents current direction in figure.

Fig. 2 show surge back-up protection device structural schematic diagram provided by the utility model.

01: end of incoming cables, 02: leading-out terminal, 03: coil, 04: deformable metal.

1: breaker body, 2: end of incoming cables, 3: leading-out terminal, 4: tripping mechanism, 5: short-circuit protection coil, 6: fracture, 7: mistake Current coil, 8: combined floodgate spanner, 9: arc-chute, 10: arc extinguishing magnetic blow-out plate.

Specific embodiment

In the description of the present invention, it should be noted that for the noun of locality, if any term " center ", " transverse direction ", " longitudinal direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position Relationship is set, narration the utility model is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning It must have a particular orientation, constructed and operated with particular orientation, should not be understood as the specific protection model for limiting the utility model It encloses.

In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include One or more this feature, in the utility model description, " at least " is meant that one or more, unless otherwise bright It is really specific to limit.

In the present invention, except as otherwise clear stipulaties and restriction, if any term " assembling ", " connected ", " connection " term It should go to understand as broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It is also possible to machine Tool connection；It can be directly connected, be also possible to be connected by intermediary, can be and be connected inside two elements.For For those of ordinary skill in the art, can understand as the case may be above-mentioned term in the present invention specifically contain Justice.

In utility model, unless otherwise specified and limited, fisrt feature second feature "upper" or "lower" can be with It is directly contacted including the first and second features, also may include that fisrt feature and second feature are not direct contacts but pass through it Between other characterisation contact.Moreover, fisrt feature second feature " on ", " under " and " above " include fisrt feature It right above second feature and oblique upper, or is only to indicate that first feature horizontal height is higher than the height of second feature.First Feature second feature " on ", " under " and " below " include that fisrt feature is directly under or diagonally below the second feature, or only Only indicate that first feature horizontal height is lower than second feature.

Below with reference to the attached drawing of specification, specific embodiment of the present utility model is further described, makes this reality With novel technical solution and its benefits are clearer.It is exemplary for describing embodiment below with reference to attached drawing , it is intended to it explains the utility model, and should not be understood as limiting the present invention.

As shown in Fig. 2, a kind of surge back-up protection device, including breaker body 1, it is arranged on the breaker body 1 End of incoming cables 2, leading-out terminal 3, tripping mechanism 4 and short-circuit protection coil 5, the tripping mechanism 4 and the short-circuit protection coil 5 according to Secondary be connected between the end of incoming cables 2 and the leading-out terminal 3 constitutes major loop, and the short-circuit protection coil 5 controls the tripping Mechanism 4 threads off；It can be by the fracture 6 of over-voltage breakdown, in the end of incoming cables 2 and institute it is characterized in that, being equipped on the major loop An overcurrent coil 7 also in parallel between leading-out terminal 3 is stated, the overcurrent coil 7 is when the electric current passed through is more than setting electric current The tripping mechanism 4 is controlled to thread off.

Wherein, the spacing of 6 two sides of fracture is 0.3 ± 0.03mm.In the present embodiment, preferably in the fracture 6 two Side is respectively equipped with electric discharge plate, to guarantee pressure release effect of discharging.

The number of ampere turns of the overcurrent coil 7 is identical as the number of ampere turns of the short-circuit protection coil 5, enough to guarantee to have Tripping magnetic attraction.The setting electric current of the overcurrent coil 7 is determined by its structure；In the present embodiment, preferred overcurrent coil 7 Setting electric current is 3A.

Further, combined floodgate spanner 8 is additionally provided on the breaker body 1.After tripping mechanism 4 disengages, i.e., rear quilt After protective device starting, it can manually close a floodgate and (determine in the unspoiled situation of SPD) by combined floodgate spanner 8, make tripping mechanism 4 It resumes contacts, so that unspoiled SPD be made to take back circuit again.

Further, it is additionally provided with arc-chute 9 and arc extinguishing magnetic blow-out plate 10 on the breaker body 1, constitutes this surge The arc-control device of back-up protection device, for eliminating the electric arc generated when tripping mechanism 4 separates.

A kind of surge back-up protection device provided in this embodiment, its working principles are as follows: in the master of existing miniature circuit breaker Increase a 0.3mm or so fracture on circuit, for discharging overvoltage, overvoltage releases rear fracture and restores insulation；Work as surge When short circuit current occurs in protector failure, the open circuit protection coil of miniature circuit breaker is cut off the power, and is shielded；In end of incoming cables With a leading-out terminal coil in parallel, the parameter of coil guarantee by when 3 Ampere currents can effective disjunction miniature circuit breaker, this coil It is identical as the number of ampere turns of short-circuit protection coil, when the leakage circuit that surge protector generates under power-frequency voltage is more than 3 ampere-hours Breaker open operation is driven, is shielded；It effectively prevent fever caused by deteriorating because of surge protector to cause fire.

From the foregoing description of structures and principles it should be understood by those skilled in the art that, the utility model It is not limited to above-mentioned specific embodiment, it is equal using the improvement of techniques well known and substitution on the basis of the utility model The protection scope of the utility model is fallen in, the protection scope of the utility model should be limited by each claim and its equivalent It.The part not illustrated in specific embodiment is the prior art or common knowledge.

Claims (7)

1. a kind of surge back-up protection device, including breaker body, end of incoming cables on the breaker body, outlet are set End, tripping mechanism and short-circuit protection coil, the tripping mechanism and the short-circuit protection coil are sequentially connected in series in the end of incoming cables Between the leading-out terminal, major loop is constituted, the short-circuit protection coil can control the tripping mechanism tripping；Its feature exists In being equipped on the major loop can be by the fracture of over-voltage breakdown, the also parallel connection one between the end of incoming cables and the leading-out terminal A overcurrent coil, the overcurrent coil can control the tripping mechanism tripping.

2. a kind of surge back-up protection device according to claim 1, which is characterized in that the spacing of the fracture two sides is 0.3±0.03mm。

3. a kind of surge back-up protection device according to claim 1, which is characterized in that set respectively in the two sides of the fracture There is electric discharge plate.

4. a kind of surge back-up protection device according to claim 1, which is characterized in that the number of ampere turns of the overcurrent coil It is identical as the number of ampere turns of the short-circuit protection coil.

5. a kind of surge back-up protection device according to claim 1, which is characterized in that the setting electricity of the overcurrent coil Stream is 3A.

6. a kind of surge back-up protection device according to claim 1, which is characterized in that be equipped on the breaker body The tripping mechanism is set to resume contacts the spanner that closes a floodgate.

7. a kind of surge back-up protection device according to claim 1, which is characterized in that be equipped on the breaker body Arc-chute and arc extinguishing magnetic blow-out plate constitute arc-control device, for eliminating the electric arc generated when the tripping mechanism separates.