阅读说明：本技术 塑壳断路器 (Plastic case circuit breaker ) 是由 祁升龙 刘海涛 何玉鹏 朱林 李磊 陈彪 芦翔 别亚峰 马海军 牛健 尹亮 栗 于 2021-01-28 设计创作，主要内容包括：本发明提供塑壳断路器,属于电力电子技术领域。包括一次电路、二次电路和铁质薄板,铁质薄板上设有开孔,一次电路中设置有传感器,一次电路和二次电路分别设置在铁质薄板的两边,通过铁质薄板隔离一次电路的电磁干扰,传感器的二次引线通过开孔转接到二次电路。本发明还提供另一种塑壳断路器,包括一次电路、二次电路和电感磁环,一次电路中设置有传感器,传感器的二次引线穿过电感磁环中心后接到二次电路,电感磁环设置在二次引线靠近二次电路的一端。(The invention provides a molded case circuit breaker, and belongs to the technical field of power electronics. Including primary circuit, secondary circuit and iron sheet metal, be equipped with the trompil on the iron sheet metal, be provided with the sensor in the primary circuit, primary circuit and secondary circuit set up respectively on the both sides of iron sheet metal, keep apart the electromagnetic interference of primary circuit through the iron sheet metal, and the secondary lead wire of sensor passes through the trompil and switches to the secondary circuit. The invention also provides another molded case circuit breaker which comprises a primary circuit, a secondary circuit and an inductance magnetic ring, wherein a sensor is arranged in the primary circuit, a secondary lead of the sensor penetrates through the center of the inductance magnetic ring and then is connected to the secondary circuit, and the inductance magnetic ring is arranged at one end of the secondary lead, which is close to the secondary circuit.)

1. The utility model provides a moulded case circuit breaker, its characterized in that includes primary circuit, secondary circuit and iron sheet metal, be equipped with the trompil on the iron sheet metal, be provided with the sensor in the primary circuit, the primary circuit with the secondary circuit sets up respectively the both sides of iron sheet metal, through the iron sheet metal is kept apart the electromagnetic interference of primary circuit, the secondary lead wire of sensor passes through the trompil is transferred to the secondary circuit.

2. A molded case circuit breaker according to claim 1, wherein the sensor is a temperature sensor, a secondary lead of the temperature sensor is connected to the secondary circuit through a first opening of the thin iron plate, a lead of a voltage terminal in the primary circuit is connected to the secondary circuit through a second opening of the thin iron plate, and a lead of a current terminal in the primary circuit is connected to the secondary circuit through a third opening of the thin iron plate.

3. A molded case circuit breaker according to claim 1, wherein the opening in the ferrous thin plate is a circular hole.

4. A molded case circuit breaker according to claim 1, wherein the sheet thickness of the iron thin plate is not more than 1 mm.

5. A molded case circuit breaker is characterized by comprising a primary circuit, a secondary circuit and an inductance magnetic ring, wherein a sensor is arranged in the primary circuit, a secondary lead of the sensor penetrates through the center of the inductance magnetic ring and then is connected to the secondary circuit, and the inductance magnetic ring is arranged at one end, close to the secondary circuit, of the secondary lead.

6. A molded case circuit breaker as recited in claim 1, wherein the sensor is a temperature sensor, a secondary lead of the temperature sensor is re-connected to the secondary circuit through a center of the first inductor magnetic ring, a lead of a voltage terminal in the primary circuit is re-connected to the secondary circuit through a center of the second inductor magnetic ring, a lead of a current terminal in the primary circuit is re-connected to the secondary circuit through a center of the third inductor magnetic ring, the center of the first inductor magnetic ring is disposed at an end of the secondary lead of the temperature sensor close to the secondary circuit, the center of the second inductor magnetic ring is disposed at an end of the lead of the voltage terminal close to the secondary circuit, and the center of the third inductor magnetic ring is disposed at an end of the lead of the current terminal close to the secondary circuit.

Technical Field

The invention relates to the technical field of power electronics, in particular to a molded case circuit breaker.

Background

At present, analog electronic devices are mostly selected for use to achieve the purposes of measurement, monitoring or protection in simple electronic molded case circuit breakers, along with the development of computer technology, digital electronic devices are more and more, functions are more and more powerful, cost performance is improved, and the digital electronic devices can be widely applied to the molded case circuit breakers to achieve the functions of measurement, monitoring, protection, communication and the like of electric equipment.

Compared with an analog electronic device, the digital electronic device has weaker anti-electromagnetic interference capability, the core function of the plastic shell switch is to switch on and off larger current, strong electric interference signals can be generated near a main contact of the plastic shell switch, and particularly at the moment of switching on and off the current, the electromagnetic interference signals are very strong, so that the electronic device can not normally work or even be damaged due to serious interference on the nearby weak electric signals. The prior art proposes to separately set up primary equipment and secondary equipment, installs in the space of difference, and the lead wire of extension sensor makes interference signal nature decay through increaseing the distance to reduce interference signal's influence, this kind of mode with primary equipment and secondary equipment separately set up can occupy great space, increases area, and the connecting wire is more between primary equipment and the secondary equipment in addition, and the construction is complicated, separately maintains primary equipment and secondary equipment, and it is more to occupy the manpower.

Disclosure of Invention

In view of this, the present invention provides a molded case circuit breaker, which improves the structure of an electronic molded case circuit breaker, improves the anti-interference capability of weak current signals of the molded case circuit breaker, and reduces or even eliminates the influence of strong electromagnetic interference signals generated in a primary circuit on a secondary circuit.

The technical scheme adopted by the embodiment of the invention for solving the technical problem is as follows:

the utility model provides a moulded case circuit breaker, includes primary circuit, secondary circuit and iron sheet metal, be equipped with the trompil on the iron sheet metal, be provided with the sensor in the primary circuit, the primary circuit with the secondary circuit sets up respectively the both sides of iron sheet metal, through the iron sheet metal is kept apart the electromagnetic interference of primary circuit, the secondary lead wire of sensor passes through the trompil is transferred to the secondary circuit.

Preferably, the sensor is a temperature sensor, a secondary lead of the temperature sensor is switched to the secondary circuit through a first open pore of the iron sheet, a leading-out wire of a voltage end in the primary circuit is switched to the secondary circuit through a second open pore of the iron sheet, and a leading-out wire of a current end in the primary circuit is switched to the secondary circuit through a third open pore of the iron sheet.

Preferably, the opening hole on the iron sheet is a round hole.

Preferably, the sheet thickness of the ferrous sheet does not exceed 1 mm.

The embodiment of the invention also provides a molded case circuit breaker, which comprises a primary circuit, a secondary circuit and an inductance magnetic ring, wherein a sensor is arranged in the primary circuit, a secondary lead of the sensor penetrates through the center of the inductance magnetic ring and then is connected to the secondary circuit, and the inductance magnetic ring is arranged at one end of the secondary lead, which is close to the secondary circuit.

Preferably, the sensor is a temperature sensor, a secondary lead of the temperature sensor is connected to the secondary circuit through the center of the first inductance magnetic ring, a lead-out wire at a voltage end in the primary circuit is connected to the secondary circuit through the center of the second inductance magnetic ring, a lead-out wire at a current end in the primary circuit is connected to the secondary circuit through the center of the third inductance magnetic ring, the center of the first inductance magnetic ring is arranged at one end, close to the secondary circuit, of the secondary lead of the temperature sensor, the center of the second inductance magnetic ring is arranged at one end, close to the secondary circuit, of the lead-out wire at the voltage end, and the center of the third inductance magnetic ring is arranged at one end, close to the secondary circuit, of the lead-out wire at the current end.

According to the technical scheme, the plastic case circuit breaker provided by the embodiment of the invention has the advantages that by improving the structure of the electronic type plastic case circuit breaker, the weak current signal anti-interference capability of the plastic case circuit breaker can be improved, the influence of strong electromagnetic interference signals generated in a primary circuit on a secondary circuit can be reduced or even eliminated, the primary high-voltage circuit and the secondary weak current circuit can be very close to each other, the occupied space of equipment is reduced, and the reliability of the equipment is improved.

Drawings

Fig. 1 is a schematic structural diagram of a molded case circuit breaker according to a first embodiment of the present invention.

Fig. 2 is a schematic structural view of a ferrous thin plate according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a second molded case circuit breaker according to an embodiment of the present invention.

In the figure: the circuit comprises a primary circuit 1, a secondary circuit 2, an iron sheet 3, an inductance magnetic ring 4, a temperature sensor 11, a voltage end 12, a current end 13, a first opening 31, a second opening 32, a third opening 33, a first inductance magnetic ring 41, a second inductance magnetic ring 42 and a third inductance magnetic ring 43.

Detailed Description

The technical scheme and the technical effect of the invention are further elaborated in the following by combining the drawings of the invention.

The embodiment of the invention provides a molded case circuit breaker, which comprises a primary circuit 1, a secondary circuit 2 and an iron thin plate 3, wherein the iron thin plate 3 is used as an electromagnetic isolation material and is provided with an opening, a sensor is arranged in the primary circuit 1, the primary circuit 1 and the secondary circuit 2 are respectively arranged at two sides of the iron thin plate 3, electromagnetic interference generated by the primary circuit 1 is isolated through the iron thin plate 3, and a secondary lead of the sensor in the primary circuit 1 is switched to the secondary circuit 2 through the opening on the iron thin plate 3.

As shown in fig. 2, the hole on the iron sheet 3 is a circular hole, the thickness of the sheet material of the iron sheet is not more than 1mm, the iron sheet 3 is provided with a plurality of holes, the primary circuit 1 is provided with a temperature sensor 11, the secondary lead of the temperature sensor 11 is switched to the secondary circuit 2 through the first hole 31 of the iron sheet 3, the outgoing line of the voltage terminal 12 in the primary circuit 1 is switched to the secondary circuit 2 through the second hole 32 of the iron sheet 3, and the outgoing line of the current terminal 13 in the primary circuit is switched to the secondary circuit 2 through the third hole 33 of the iron sheet 3.

Through the wiring mode, after the circuit is electrified, the iron sheet 3 can play an electromagnetic isolation role between the primary circuit 1 and the secondary circuit 2, electromagnetic interference signals generated when the primary circuit 1 is switched on and switched off are reduced or eliminated, and the influence on digital electronic devices in the secondary circuit 2 is reduced.

As shown in fig. 3, another molded case circuit breaker according to an embodiment of the present invention further includes a primary circuit 1, a secondary circuit 2, and an inductance magnetic ring 4, wherein a sensor is disposed in the primary circuit 1, a secondary lead of the sensor passes through a center of the inductance magnetic ring 4 and then is connected to the secondary circuit 2, and the inductance magnetic ring 4 is disposed at one end of the secondary lead of the sensor, which is close to the secondary circuit 2.

As shown in fig. 3, a temperature sensor 11 is disposed in a primary circuit 1, a secondary lead of the temperature sensor 11 is connected to a secondary circuit 2 through the center of a first inductance magnetic ring 41, an outgoing line of a voltage terminal 12 in the primary circuit 1 is connected to the secondary circuit 2 through the center of a second inductance magnetic ring 42, an outgoing line of a current terminal 13 in the primary circuit 1 is connected to the secondary circuit 2 through the center of a third inductance magnetic ring 43, wherein the center of the first inductance magnetic ring 41 is disposed at one end of the secondary lead of the temperature sensor 11 close to the secondary circuit 2, the center of the second inductance magnetic ring 42 is disposed at one end of the outgoing line of the voltage terminal 12 close to the secondary circuit 2, and the center 43 of the third inductance magnetic ring is disposed at one end of the outgoing line of the current terminal 13 close to the.

Through the wiring mode, after the secondary circuit 2 is electrified, the inductance magnetic ring 4 can play a role in absorbing electromagnetic interference signals generated when the primary circuit 1 is switched on and switched off near the secondary circuit 2, and the influence on digital electronic devices in the secondary circuit 2 is reduced.

According to the molded case circuit breaker provided by the embodiment of the invention, through improving the structure of the electronic molded case circuit breaker, the weak current signal anti-interference capability of the molded case circuit breaker is improved, the influence of strong electromagnetic interference signals generated in a primary circuit on a secondary circuit is reduced and even eliminated, so that the primary high-voltage circuit and the secondary weak current circuit can be very close to each other, and the occupied space of equipment is reduced.

By adopting the embodiment of the invention, the reliability of the secondary circuit can be improved, the electronic molded case circuit breaker is used for replacing the original purely mechanical molded case circuit breaker, the protection level of the power utilization circuit can be improved, the low-voltage circuit protection has selectivity, speed and sensitivity, and the safety performance of power utilization can be improved.

By adopting the embodiment of the invention, the primary circuit and the secondary circuit can be compactly installed and integrated. The primary and secondary fusion electronic molded case circuit breaker can reduce the volume of an installation cabinet body and greatly reduce the installation space.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.