CN205159228U - a circuit breaker - Google Patents

Abstract

The utility model discloses a breaker, including shell, conducting rod, play wire sleeve and operating device, the conducting rod is established on the shell, it establishes respectively in the shell both sides to go out wire sleeve and operating device, the conducting rod outside is provided with insulation support, insulation support is connected with the conducting rod veneer, the conducting rod bottom is provided with insulated isolation cover and vacuum interrupter, it is provided with electrically conductive the clamp to go out wire sleeve one side, the electrically conductive clamp and play wire sleeve electric connection, the electrically conductive clamp and conducting rod swing joint, electrically conductive double bottom portion has set gradually flexible coupling and insulating pull rod, insulating pull rod is connected through flexible coupling and electrically conductive the clamp, insulating pull rod one side is provided with the pivot, insulating pull rod is connected through pivot and operating device transmission, and this breaker is insulating effectual, uses safe and reliable, convenient operation, and compact structure, it is small.

Description

a circuit breaker

technical field

The utility model relates to the technical field of power distribution equipment, in particular to a circuit breaker.

Background technique

A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into For high-voltage circuit breakers and low-voltage circuit breakers, the division of high and low voltage boundaries is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances.

Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. Combination with overheat and underheat relays, etc., and generally do not need to change parts after breaking the fault current. At present, it has been widely used. Power distribution is an extremely important link in the generation, transmission and use of electricity. Distribution The electrical system includes transformers and various high and low-voltage electrical equipment. Low-voltage circuit breakers are widely used electrical appliances. The main contacts of low-voltage circuit breakers are closed manually or electrically. After the main contacts are closed, The free release mechanism locks the main contact in the closed position, the coil of the overcurrent release and the thermal element of the thermal release are connected in series with the main circuit, the coil of the undervoltage release is connected in parallel with the power supply, and when the circuit is short-circuited Or serious overload, the armature of the over-current release will pull in, so that the free release mechanism will act, and the main contact will disconnect the main circuit. When the circuit is overloaded, the heating element of the thermal release will bend the bimetal and push The free tripping mechanism operates. When the circuit is undervoltage, the armature of the undervoltage release is released, which also makes the free tripping mechanism act. The shunt release is used for remote control. In normal operation, its coil is disconnected. Electric, when distance control is required, press the start button to energize the coil.

At present, the existing circuit breakers have complex structures, general insulation effect, inconvenient operation and low operation safety performance.

Utility model content

The technical problem to be solved by the utility model is to provide a circuit breaker with good insulation effect, safe and reliable use, convenient operation, compact structure and small volume.

In order to solve the above problems, the utility model adopts the following technical scheme: a circuit breaker, including a casing, a conductive rod, an outlet casing and an operating mechanism, the conductive rod is arranged on the casing, and the outgoing casing and the operating mechanism are respectively set On both sides of the casing, insulating sleeves are provided outside the conductive rod, and the insulating sleeve is glued to the conductive rod. The bottom of the conductive rod is provided with an insulating isolation cover and a vacuum interrupter, and the installed casing maintains a compact structure. Small size, the conductive rod can keep the current connected smoothly, the insulating sleeve and the insulating isolation cover can maintain good insulation effect, the vacuum interrupter can eliminate the arc, and keep the use safe and reliable, and the conductive clip can conveniently control the opening and closing of the circuit , the operating mechanism can control the movement of the insulating pull rod through the rotating shaft, a conductive clip is provided on one side of the outlet bushing, the conductive clip is electrically connected to the outlet bushing, the conductive clip is movably connected to the conductive rod, and the conductive clip The bottom is provided with a flexible connection and an insulating pull rod in turn. The insulating pull rod is connected to the conductive clip through a flexible connection. A rotating shaft is provided on one side of the insulating pulling rod, and the insulating pulling rod is connected to the operating mechanism through the rotating shaft.

Preferably, an opening spring is provided on one side of the insulating pull rod, and the opening spring can make the conductive clip be in an opening state.

Preferably, one side of the opening spring is fixedly connected to the housing to keep the structure of the opening spring stable.

Preferably, the bottom of the housing is provided with feet to keep the installation stable and reliable.

Preferably, a current transformer is arranged outside the outlet bushing to keep the operation safe and reliable.

The beneficial effects of the utility model are: the set shell keeps compact structure and small volume; the conductive rod can keep the current connected smoothly; The use is safe and reliable, the conductive clip can conveniently control the opening and closing of the circuit, and the operating mechanism can control the movement of the insulating pull rod through the rotating shaft.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural diagram of a circuit breaker of the present invention.

detailed description

Referring to Fig. 1, a circuit breaker includes a casing 1, a conductive rod 2, an outlet casing 3 and an operating mechanism 4, the conductive rod 2 is arranged on the casing 1, and the outgoing casing 3 and the operating mechanism 4 are respectively Located on both sides of the shell 1, the outer side of the conductive rod 2 is provided with an insulating sleeve 5, the insulating sleeve 5 is glued to the conductive rod 2, and the bottom of the conductive rod 2 is provided with an insulating isolation cover 6 and a vacuum interrupter 7. A conductive clip 8 is provided on one side of the outlet sleeve 3. When in use, the conductive rod 2 and the outlet sleeve 3 are respectively connected to the circuit, and the opening spring 12 separates the conductive clip 8 from the conductive rod 2. The circuit is disconnected, and the rotating shaft 11 drives the insulating pull rod 10 to move through the operating mechanism 4, so that the conductive clip 8 is in contact with the conductive rod 2, and the circuit can be connected. The conductive clip 8 is electrically connected to the outlet bushing 3, and the conductive clip 8 is movably connected with the conductive rod 2, the bottom of the conductive clip 8 is provided with a soft connection 9 and an insulating pull rod 10 in turn, the insulating pull rod 10 is connected with the conductive clip 8 through the flexible connection 9, and a rotating shaft is arranged on one side of the insulating pull rod 10 11 , the insulating pull rod 10 is in drive connection with the operating mechanism 4 through the rotating shaft 11 .

An opening spring 12 is also provided on one side of the insulating pull rod 10 , and when in use, the opening spring 12 can make the conductive clip 8 in an opening state.

One side of the opening spring 12 is fixedly connected with the casing 1, and the structure of the opening spring 12 is kept stable during use.

The bottom of the housing 1 is provided with feet 13, which keep the installation stable and reliable during use.

A current transformer 14 is arranged on the outer side of the outlet bushing 3 to keep the operation safe and reliable during use.

When in use, the conductive rod 2 and the outlet bushing 3 are respectively connected to the circuit, the opening spring 12 separates the conductive clip 8 from the conductive rod 2, the circuit is disconnected, and the rotating shaft 11 drives the insulating pull rod 10 to move through the operating mechanism 4 , so that the conductive clip 8 is in contact with the conductive rod 2, and the circuit can be connected.

The beneficial effects of the utility model are: the set shell keeps compact structure and small volume; the conductive rod can keep the current connected smoothly; The use is safe and reliable, the conductive clip can conveniently control the opening and closing of the circuit, and the operating mechanism can control the movement of the insulating pull rod through the rotating shaft.

The above is only a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any change or replacement that is not thought of through creative work should be covered within the scope of protection of the utility model Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (5)

1. a circuit breaker, it is characterized in that: comprise shell, conducting rod, outlet casing tube and operating mechanism, described conducting rod is located on shell, described outlet casing tube and operating mechanism are located at shell both sides respectively, described conducting rod arranged outside has insulating sleeve, described insulating sleeve glues together with conducting rod and is connected, insulated isolation cover and vacuum interrupter is provided with bottom described conducting rod, described outlet casing tube side is provided with conductive clip, described conductive clip and outlet casing tube are electrically connected, described conductive clip is flexibly connected with conducting rod, be disposed with bottom described conductive clip and be flexible coupling and insulated tension pole, described insulated tension pole to be connected with conductive clip by being flexible coupling, described insulated tension pole side is provided with rotating shaft, described insulated tension pole is in transmission connection by rotating shaft and operating mechanism.

2. circuit breaker according to claim 1, is characterized in that: described insulated tension pole side is also provided with tripping spring.

3. circuit breaker according to claim 2, is characterized in that: described tripping spring side is fixedly connected with shell.

4. circuit breaker according to claim 1, is characterized in that: described outer casing bottom is provided with leg.

5. circuit breaker according to claim 1, is characterized in that: described outlet casing tube arranged outside has current transformer.