阅读说明：本技术 具有故障录波性能的断路器装置 (Circuit breaker device with fault recording performance ) 是由 曾俊 华龙元 吴亚迪 张志华 宋骥 刘伟 耿真磊 于 2020-07-09 设计创作，主要内容包括：一种具有故障录波性能的断路器装置,包括第二壳体、第三壳体、断路器主体和双层电流采集器；所述第二壳体和第三壳体扣合起来形成中空壳体一,所述中空壳体一内的空间设置有所述断路器主体和在所述断路器主体旁的双层电流采集器；所述双层电流采集器用于对所述断路器主体进行故障录波。结合其它结构有效避免了现有技术中断路器都不具备故障录波功能的缺陷。(A circuit breaker device with fault recording performance comprises a second shell, a third shell, a circuit breaker main body and a double-layer current collector; the second shell and the third shell are buckled to form a first hollow shell, and the circuit breaker main body and a double-layer current collector beside the circuit breaker main body are arranged in the space in the first hollow shell; the double-layer current collector is used for carrying out fault recording on the breaker main body. The defect that the breaker does not have the fault recording function in the prior art is effectively overcome by combining other structures.)

1. A circuit breaker device with fault recording performance is characterized by comprising a second shell, a third shell, a circuit breaker main body and a double-layer current collector;

the second shell and the third shell are buckled to form a first hollow shell, and the circuit breaker main body and a double-layer current collector beside the circuit breaker main body are arranged in the space in the first hollow shell;

the double-layer current collector is used for carrying out fault recording on the breaker main body.

2. The circuit breaker apparatus with fault recording capability of claim 1, wherein said double-layer current collector comprises a current transformer and a rogowski coil, said current transformer and the rogowski coil having the same diameter as the current transformer are stacked together and wrapped with an insulating sheath.

3. The circuit breaker apparatus with fault recording capability according to claim 2, wherein the rogowski coil is a hard rogowski coil.

4. The circuit breaker apparatus with fault recording capability of claim 1, further comprising a first housing, an electrically operated mechanism and a circuit board;

the first shell and the second shell are buckled to form a second hollow shell;

and the circuit board and the electric operating mechanism are arranged in the space in the hollow shell II.

5. The circuit breaker apparatus with fault recording capability of claim 4, wherein the electric operating mechanism comprises a micro motor, a cross worm, a first double-layer reduction gear, a second double-layer reduction gear, a third double-layer reduction gear, a special-shaped protruding gear, a handle linkage push rod and a trip lever;

the cross worm is sleeved at the output end of the micro motor;

the belt cross worm, the double-layer reduction gear I, the double-layer reduction gear II, the double-layer reduction gear III and the special-shaped gear with the bulge are sequentially meshed;

the special-shaped belt convex gear is sleeved on the handle linkage push rod.

6. The circuit breaker apparatus with fault recording capability of claim 4, wherein the circuit breaker body comprises an incoming terminal, an arc extinguishing chamber, a short circuit release, a bimetal adjusting screw, a contact, a bimetal, a handle, a status indication frame and an outgoing terminal.

7. The circuit breaker apparatus with fault recording capability of claim 4, wherein the double layer current collector and the micro motor are both connected to the circuit board.

Technical Field

The invention belongs to the technical field of circuit breakers, and particularly relates to a circuit breaker device with fault recording performance.

Background

A low-voltage circuit breaker (once called an automatic switch) is a switching device which can not only connect and disconnect normal load current and overload current, but also connect and disconnect short-circuit current. The low-voltage circuit breaker has certain protection functions such as overload, short circuit, leakage protection and the like besides the function of starting control in the circuit. It can be used to distribute electric energy, protect power supply circuit and motor, and can automatically cut off circuit when they have serious overload or short circuit and under-voltage faults, and its function is equivalent to the combination of fuse switch and over-and under-heat relay. Moreover, after the fault current is cut off, parts do not need to be changed generally, and the method is widely applied.

In recent years, more and more circuit breakers with an electric energy metering function and circuit breakers with a remote control function appear to replace the traditional circuit breakers, and although the functions are more and more, the reliability is reduced. With the increasing expansion of the scale of power grids, an intelligent circuit breaker with complete functions of fault diagnosis, post-accident data analysis, protection and the like is urgently needed, and the intelligent circuit breaker plays an important role in safe and reliable operation of a power system.

And the fault recording is a scheduling end network fault diagnosis system based on fault recording information. The fault recorder is used for a power system, can automatically and accurately record the change conditions of various electrical quantities in the processes before and after a fault when the system has the fault, and has important functions of analyzing and comparing the electrical quantities, analyzing and processing the fault, judging whether protection acts correctly or not and improving the safe operation level of the power system.

At present, the circuit breaker does not have a fault recording function.

Disclosure of Invention

In order to solve the problems, the invention provides a circuit breaker device with a fault recording function, which effectively overcomes the defect that the circuit breakers in the prior art do not have the fault recording function.

In order to overcome the defects in the prior art, the invention provides a solution for a circuit breaker device with a fault recording performance, which comprises the following specific steps:

a breaker device with fault recording performance comprises a second shell 4, a third shell 7, a breaker main body 5 and a double-layer current collector 6;

the second shell 4 and the third shell 7 are buckled to form a first hollow shell, and the circuit breaker main body 5 and a double-layer current collector 6 beside the circuit breaker main body 5 are arranged in the space in the first hollow shell;

the double-layer current collector 6 is used for carrying out fault recording on the breaker main body 5.

Further, the double-layer current collector 6 comprises a current transformer 6-1 and a Rogowski coil 6-2, wherein the current transformer 6-1 and the Rogowski coil 6-2 with the same diameter as the current transformer are stacked together and wrapped by an insulating skin.

Further, the Rogowski coil 6-2 is a rigid Rogowski coil.

Further, the circuit breaker device with the fault recording performance further comprises a first shell 1, an electric operating mechanism 3 and a circuit board 2;

the first shell 1 and the second shell 4 are buckled to form a second hollow shell;

the circuit board 2 and the electric operating mechanism 3 are arranged in the space in the hollow shell II.

Further, the electric operating mechanism 3 comprises a micro motor 3-1, a cross worm 3-2, a double-layer reduction gear I3-3, a double-layer reduction gear II 3-4, a double-layer reduction gear III 3-5, a special-shaped protruding gear 3-6, a handle linkage push rod 3-7 and a tripping lever 3-8;

the cross worm 3-2 is sleeved at the output end of the micro motor 3-1;

the belt cross worm 3-2, the double-layer reduction gear I3-3, the double-layer reduction gear II 3-4, the double-layer reduction gear III 3-5 and the special-shaped gear with the bulge are sequentially meshed;

the special-shaped gear with the bulge 3-6 is sleeved on the handle linkage push rod 3-7;

furthermore, the breaker main body 5 comprises an incoming wiring terminal 5-1, an arc extinguish chamber 5-2, a short circuit release 5-3, a double-metal adjusting screw 5-4, a contact 5-5, a bimetallic strip 5-6, a handle 5-7, a state indicating frame 5-8 and an outgoing wiring terminal 5-9.

Further, the double-layer current collector 6 and the micro motor are both connected to the circuit board 2.

When the power utilization network is normal, the circuit breaker carries out electric energy metering through high accuracy current transformer, in case the power utilization network appears unusually, if the short circuit appears, transship, high pressure scheduling problem, the circuit breaker can gather the problem current waveform through the rogowski coil and carry out the record, based on the characteristics that the rogowski coil is unsaturated forever, even there is very high fault current, the rogowski coil still can be complete gather the fault current out, guarantees the reliability of record wave function.

The invention has the beneficial effects that:

the invention not only has the short circuit and overload protection function of the traditional circuit breaker, but also can automatically and accurately record the change conditions of various electrical quantities in the processes before and after the fault when the system has the fault, thereby being beneficial to analyzing and comparing the change conditions of the electrical quantities, analyzing and processing accidents, judging whether the protection acts correctly and improving the safe operation level of the power system. The current detection mode of the invention adopts a scheme of a high-precision current transformer and a Rogowski coil, wherein the high-precision current transformer is used for measuring electric energy, and the current is 2 times of the rated current to the maximum; the Rogowski coil is used for fault recording and protection, and the maximum current can be 10 times of the rated current; therefore, the accuracy of electric energy metering is ensured, and the complete waveform of the fault can be recorded when the fault occurs.

Drawings

Fig. 1 is a component diagram of a circuit breaker apparatus having fault recording capability of the present invention.

Fig. 2 is a structural view of the electric operating mechanism of the present invention.

Fig. 3 is a structural view of the breaker main body of the present invention.

Fig. 4 is a schematic structural diagram of the double-layer current collector of the present invention.

Fig. 5 is a structural view of the Phillips worm of the present invention.

Fig. 6 is a structural view of a profile toothed lobe according to the present invention.

FIG. 7 is a front schematic view of the handle-linked pusher of the present invention.

FIG. 8 is a reverse side schematic view of the handle-linked pusher of the present invention.

Fig. 9 is a structural view of the trip lever of the present invention.

Fig. 10 is a structural view of the double-gold adjusting screw of the present invention.

Detailed Description

The invention will be further described with reference to the following figures and examples.

As shown in fig. 1 to 4, the circuit breaker apparatus with fault recording capability includes a second housing 4, a third housing 7, a circuit breaker main body 5, and a double-layer current collector 6;

the second shell 4 and the third shell 7 are buckled to form a first hollow shell, and the circuit breaker main body 5 and a double-layer current collector 6 beside the circuit breaker main body 5 are arranged in the space in the first hollow shell; the breaker main body 5 is fixedly connected in the space in the first hollow shell in a threaded connection mode. The double-layer current collector 6 is used for carrying out fault recording on the breaker main body 5. The second casing 4 and the third casing 7 may be fastened together by screwing bolts. Double-deck current collector 6 is used for right circuit breaker main part 5 carries out the trouble record ripples, has effectively avoided the defect that the circuit breaker all does not possess the trouble record ripples function among the prior art. The double-layer current collector 6 is a novel current collector and comprises a high-precision current transformer 6-1 and a Rogowski coil 6-2, wherein the high-precision current transformer 6-1 and the Rogowski coil 6-2 with the same diameter as the high-precision current transformer are stacked together and wrapped by an insulating skin. The high-precision current transformer can realize 0.5S-level electric energy metering, and the accuracy of the electric energy metering is ensured at high precision; the rogowski coil is a hollow annular coil, has two types of flexibility and rigidity, and can be directly sleeved on a conductor of a measured circuit breaker body 5 to measure alternating current. The Rogowski coil 6-2 adopts a rigid Rogowski coil. The rigid Rogowski coil adopts a circuit board drawing mode, is suitable for measuring alternating current in a wider frequency range, has no special requirements on conductors and sizes, has quicker instant response capability, and is particularly suitable for occasions needing wide-frequency and large-current measurement similar to the fault recording function of the invention. The circuit breaker device with the fault recording performance further comprises a first shell 1, an electric operating mechanism 3 and a circuit board 2; the first shell 1 and the second shell 4 are buckled to form a second hollow shell; the circuit board 2 and the electric operating mechanism 3 are arranged in the space in the hollow shell II. The circuit board 2 can be a single chip microcomputer. The Rogowski coil is a hollow annular coil and comprises a coil and a framework, the framework is flexible and rigid, the flexible framework is called as a flexible Rogowski coil, the rigid framework is called as a rigid Rogowski coil, a drawing circuit board belongs to rigid materials, and the Rogowski coil is manufactured in a drawing circuit board mode, namely a lead is drawn on the circuit board according to a certain rule.

The electric operating mechanism 3 comprises a micro motor 3-1, a cross worm 3-2, a double-layer reduction gear I3-3, a double-layer reduction gear II 3-4, a double-layer reduction gear III 3-5, a special-shaped protruding gear 3-6, a handle linkage push rod 3-7 and a tripping lever 3-8; the cross worm 3-2 is sleeved at the output end of the micro motor 3-1; the belt cross worm 3-2, the double-layer reduction gear I3-3, the double-layer reduction gear II 3-4, the double-layer reduction gear III 3-5 and the special-shaped gear with the bulge are sequentially meshed; the special-shaped gear with the bulge 3-6 is sleeved on the handle linkage push rod 3-7.

The working principle of the electric operating mechanism is as follows: the electric operating mechanism is driven by a micro motor 3-1, the micro motor 3-1 drives a cross worm 3-2 to rotate, the cross worm 3-2 drives a double-layer reduction gear I3-3 to rotate, the double-layer reduction gear I3-3 drives a double-layer reduction gear II 3-4 to rotate, the double-layer reduction gear II 3-4 drives a double-layer reduction gear III 3-5 to rotate, the double-layer reduction gear III 3-5 drives a special-shaped convex gear 3-6 to rotate, the special-shaped convex gear 3-6 pushes a handle to link with a push rod 3-7 to push the handle to rotate clockwise to realize electric switching-on operation, or the special-shaped convex gear 3-6 pushes the handle to link with the push rod 3-7 to push a tripping lever 3-8 to realize electric switching-off operation.

The cross worm is arranged on the micro motor 3-1 and can synchronously rotate forwards and backwards along with the micro motor 3-1 as shown in figure 5. The lower figure is a cross-worm with structure not mounted on the micro-motor 3-1.

As shown in fig. 6, the protruding part of the protruding gear 3-6 can be used to push the handle to rotate in conjunction with the push rod 3-7, so as to drive the handle to close the switch, and the protruding part of the protruding gear 3-6 can be used to push the trip lever 3-8 to trigger the switch. The lower drawing shows the structure of the special-shaped gear when the special-shaped gear is not installed.

The handle linkage push rod is synchronous with the action of the handle as shown in figures 7 and 8, the handle linkage push rod rotates clockwise, the handle also rotates clockwise, the handle linkage push rod rotates anticlockwise, and the handle also rotates anticlockwise. The lower drawing shows the structure of the handle linked push rod when not installed.

The tripping lever is shown in fig. 9, the counterclockwise rotation of the convex part in the special-shaped gear 3-6 with the convex is used for pushing the tripping lever 3-8 to trigger the brake opening. Fig. 9 is a structure of the uninstalled trip levers 3 to 8.

The connection relation of all parts of the disconnecting breaker main body 5 is shown in fig. 3, an incoming wiring terminal 5-1, a short-circuit release 5-3, a contact 5-5, a bimetallic strip 5-6 and an outgoing wiring terminal 5-9 are sequentially connected in series, and a connecting line between the bimetallic strip 5-6 and the outgoing wiring terminal 5-9 needs to penetrate through the double-layer current collector 6. The handles 5-7 can control the on/off of the contact, and the state indicating frame indicates the on/off state of the contact.

The double-metal adjusting screw is shown in fig. 10, and has the function of adjusting the angle and the bending degree of the bimetallic strip 5-6. The structure is shown in fig. 10.

The breaker main body 5 comprises an incoming wiring terminal 5-1, an arc extinguish chamber 5-2, a short circuit release 5-3, a double-metal adjusting screw 5-4, a contact 5-5, a bimetallic strip 5-6, a handle 5-7, a state indicating frame 5-8 and an outgoing wiring terminal 5-9. The double-layer current collector 6 and the micro motor are both connected to the circuit board 2. Therefore, the double-layer current collector 6 can transmit collected signals to the circuit board 2, and in addition, the circuit board 2 can also operate the micro motor to operate.

When the power utilization network is normal, the circuit breaker carries out electric energy metering through high accuracy current transformer, in case the power utilization network appears unusually, if the short circuit appears, transship, high pressure scheduling problem, the circuit breaker can gather the problem current waveform through the rogowski coil and carry out the record, based on the characteristics that the rogowski coil is unsaturated forever, even there is very high fault current, the rogowski coil still can be complete gather the fault current out, guarantees the reliability of record wave function.

The present invention has been described in an illustrative manner by the embodiments, and it should be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, but is capable of various changes, modifications and substitutions without departing from the scope of the present invention.