CN-224217366-U - High-voltage sampling capacitor group, mortise-tenon connected circuit board and circuit breaker

Abstract

The utility model provides a mortise-tenon connection circuit board and a circuit breaker, which are characterized in that ceramic capacitors are combined in a serial connection and parallel connection mode, ceramic capacitors with corresponding capacitance values are selected for voltage division according to the capacitance value to be finally achieved, the withstand voltage level of the whole capacitor is obviously improved, and accordingly the national standard lightning pulse test requirement is met. Further, the assembly mode of the mortise and tenon structure is adopted, so that space interference with other functional parts on the pole is avoided, and matching with the installation space of the existing pole is realized.

Inventors

• ZHANG HUI
• LIN TIANZHU
• ZHAO FEI
• WANG BO
• ZHANG XIAOLONG

Assignees

• 上海宏力达国际贸易有限公司

Dates

Publication Date

20260508

Application Date

20241113

Claims (8)

1. 1. A mortise-and-tenon joint circuit board, characterized in that the circuit board includes: The ceramic capacitor comprises a plurality of groups of ceramic capacitor units which are connected in series, wherein each group of ceramic capacitor units comprises a plurality of ceramic capacitors which are connected in parallel, and the ceramic capacitors in two adjacent ceramic capacitor units are connected in a one-to-one correspondence manner; N main PCB boards and connecting plates; A plurality of mounting positions of the ceramic capacitors are arranged in the main PCB; And the first main PCB and the N main PCB are respectively connected with the connecting plates in a mortise-tenon mode.
2. 2. The mortise-and-tenon joint circuit board according to claim 1 wherein the ceramic capacitor has a first electrode and a second electrode; In any group of ceramic capacitor units, the first electrodes of the ceramic capacitors are connected in parallel to form a first common electrode; the second electrodes of the ceramic capacitors are connected in parallel to form a second common electrode; the second common electrode of the ceramic capacitor in the former ceramic capacitor unit is connected with the first common electrode of the ceramic capacitor in the latter ceramic capacitor unit.
3. 3. The mortise-tenon joint circuit board according to claim 2 is characterized in that a plurality of ceramic capacitor units are sequentially connected in series along a first direction to form ceramic capacitor groups, the ceramic capacitor groups are arranged at intervals along a second direction, ceramic capacitor units in two adjacent ceramic capacitor groups along the second direction are connected in series head and tail, and the first direction and the second direction are two directions which are mutually perpendicular in the same plane.
4. 4. A mortise-and-tenon joint circuit board according to claim 3 wherein a plurality of the ceramic capacitors are equidistantly and parallelly arranged along the second direction.
5. 5. The mortise-tenon joint circuit board according to claim 4 wherein the surface of the PCB is treated with a gold plating.
6. 6. The mortise-and-tenon joint circuit board according to claim 5 wherein the ceramic capacitors on two adjacent main PCB boards are respectively mounted on two opposite sides of the main PCB boards.
7. 7. The mortise-tenon joint circuit board according to claim 5 or 6, wherein a plurality of through holes which are equidistantly and parallelly arranged are formed in the connecting plate.
8. 8. A circuit breaker comprising a high voltage sampling capacitor bank according to any of claims 1-7.

Description

High-voltage sampling capacitor group, mortise-tenon connected circuit board and circuit breaker Technical Field The utility model relates to the technical field of electronic equipment manufacturing, in particular to a mortise-tenon joint circuit board and a circuit breaker. Background The high voltage sampling capacitor in the market at present commonly adopts a ceramic capacitor series connection mode to realize high voltage resistance, and particularly selects the ceramic capacitor with the corresponding capacitance value for voltage division according to the capacitance value to be finally achieved. However, since the chip ceramic capacitor package existing in the market is large and limited by the specifications of the post, the design of a single PCB often cannot meet the requirements. At the same time, the traditional PCB layout also results in a bulky overall structure. In addition, the series connection of a large number of ceramic capacitors inevitably brings about a heat dissipation problem, and local overheating is likely to occur. In addition, in the prior art, the connection between the PCB boards depends on wire connection, so that the assembly difficulty is increased, and the reliability is easily reduced due to too many connection points. Disclosure of utility model The utility model provides a mortise-tenon connected circuit board and a circuit breaker, which improve the withstand voltage level of an integral capacitor. The utility model provides a high-voltage sampling capacitor group which comprises a plurality of groups of ceramic capacitor units connected in series, wherein each group of ceramic capacitor units comprises a plurality of ceramic capacitors connected in parallel, and the ceramic capacitors in two adjacent ceramic capacitor units are connected in a one-to-one correspondence manner. The ceramic capacitor comprises a ceramic capacitor unit, a first electrode, a second electrode, a first common electrode, a second common electrode and a first common electrode, wherein the ceramic capacitor unit is provided with a first electrode and a second electrode, the first common electrode is formed after the first electrodes of the ceramic capacitors are connected in parallel in any group, the second common electrode is formed after the second electrodes of the ceramic capacitors are connected in parallel in the ceramic capacitor unit, and the second common electrode of the ceramic capacitor in the former ceramic capacitor unit is connected with the first common electrode of the ceramic capacitor in the latter ceramic capacitor unit. Further, a plurality of ceramic capacitor units are sequentially connected in series along a first direction to form ceramic capacitor groups, the ceramic capacitor groups are arranged at intervals along a second direction, ceramic capacitor units in two adjacent ceramic capacitor groups along the second direction are connected in series head and tail, and the first direction and the second direction are two directions which are mutually perpendicular in the same plane. Further, a plurality of ceramic capacitors are equidistantly and parallelly arranged along the second direction. The utility model also provides a mortise-tenon connected circuit board, the mortise-tenon connected circuit board is internally provided with the high-voltage sampling capacitor group with the structure, and the circuit board comprises: N main PCB boards and connecting plates; a plurality of ceramic capacitor mounting positions are arranged in the main PCB; And the first main PCB and the N main PCB are respectively connected with the connecting plates in a mortise-tenon mode. Furthermore, the surface of the PCB is treated by adopting gold melting. Further, the ceramic capacitors on two adjacent main PCB boards are respectively arranged on two opposite surfaces of the main PCB boards. Further, a plurality of through holes which are distributed in parallel at equal intervals are formed in the connecting plate. The utility model also provides a circuit breaker, wherein the high-voltage sampling capacitor group is arranged in the circuit breaker. Compared with the prior art, the utility model has at least the following technical effects: In the utility model, ceramic capacitors are combined in a serial and parallel mode, ceramic capacitors with corresponding capacitance values are selected for voltage division according to the capacitance value to be finally achieved, the withstand voltage level of the whole capacitor is obviously improved, thus the national standard lightning pulse test requirement is met, in addition, the ceramic capacitors in each group of units are connected in parallel to disperse voltage stress, the pressure burden of a single capacitor is reduced, the one-to-one correspondence connection between adjacent units ensures uniform voltage distribution, and certain capacitors are prevented from bearing over high voltage. Drawings FIG. 1 is a schematic diagram of a