Direct-current tandem high-voltage circuit breaker

Abstract

The utility model relates to the field of circuit breakers, and discloses a direct-current series connection type high-voltage circuit breaker which comprises a first insulating base, a contact arc extinguishing mechanism is detachably arranged on the front side of the first insulating base, an operating mechanism is rotatably arranged on the front side of the contact arc extinguishing mechanism, a second insulating base is arranged on the front side of the operating mechanism, and the second insulating base is arranged on the front side of the operating mechanism. An insulating rotating shaft is rotatably arranged in the middle of the front side wall of the second insulating base, an insulating middle cover is arranged on the front side of the second insulating base, and an insulating upper cover is arranged on the front side of the insulating middle cover. According to the direct-current series connection type high-voltage circuit breaker, through the arrangement of the series connection type connecting plates, when a plurality of ports of the circuit breaker are connected in series, the segment voltage of each port is reduced, so that the voltage pressure of different segments is reduced through a multi-stage series connection structure, and the occurrence of electrical faults is reduced.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, and in particular to DC series high-voltage circuit breakers. Background Technology

[0002] A DC circuit breaker, also known as a contactless air switch, is a switching device that automatically disconnects the circuit when the current exceeds the rated current. The working principle of a DC circuit breaker is primarily based on the thermal effect of current. When current flows through a conductor, it generates heat, causing the conductor's temperature to rise. If the current is too high, the conductor's temperature will rise rapidly, leading to damage to the insulation material and even causing safety accidents such as fires. A DC circuit breaker determines whether there are abnormal conditions such as overload or short circuits in the circuit by detecting the conductor's temperature or the magnitude of the current. Once an abnormality is detected, the circuit breaker will automatically disconnect the circuit to prevent safety accidents.

[0003] DC circuit breakers are primarily used in applications requiring DC power supply and protection, such as in the new energy sector: widely applied in solar photovoltaic and wind power generation systems, as well as energy storage systems to protect battery packs; in the transportation sector: used for power supply system protection in urban rail transit, and charging circuit protection in electric vehicle charging facilities; in the industrial sector: used in industrial automation control systems to protect circuits and equipment from overload or short-circuit faults. They are also used in industries such as metallurgy and chemicals to protect the safe operation of critical equipment; in the power system sector: playing a vital role in DC transmission systems to ensure the safe and stable operation of the system. Furthermore, in flexible DC transmission systems, they are used to achieve fault isolation and power restoration functions.

[0004] Existing DC circuit breakers experience significant stress when used under high voltage conditions, which can easily lead to electrical faults and limit their applicability. Therefore, a DC series-connected high-voltage circuit breaker has been proposed. Utility Model Content

[0005] The present invention addresses the technical problem that existing DC circuit breakers are subjected to high pressure when used under high voltage conditions, which can easily lead to electrical faults and have low applicability. The present invention provides a DC series high voltage circuit breaker.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A DC series high-voltage circuit breaker includes a first insulating base. A contact arc-extinguishing mechanism is detachably mounted on the front side of the first insulating base. An operating mechanism is rotatably mounted on the front side of the contact arc-extinguishing mechanism. A second insulating base is mounted on the front side of the operating mechanism. An insulating shaft is rotatably mounted on the middle of the front sidewall of the second insulating base. An insulating middle cover is mounted on the front side of the second insulating base, and an insulating top cover is mounted on the front side of the insulating middle cover. In use, the first insulating base, second insulating base, insulating middle cover, and insulating top cover provide insulation protection for the circuit breaker, preventing leakage. Simultaneously, it can disconnect the circuit in the event of a short circuit, protecting the circuit. The operating mechanism allows for manual control of the circuit breaker.

[0008] Furthermore, the rear cross-sections of both the first insulating base and the second insulating base are rectangular.

[0009] Furthermore, several series-connected plates are provided at the connection points between the first insulating base and the two side edges of the contact arc-extinguishing mechanism. These series-connected plates are made of pure copper. By setting the series-connected plates, when multiple ports of the circuit breaker are connected in series, the segment voltage of each port is reduced. This multi-stage series structure reduces the voltage pressure of different segments, decreases the occurrence of electrical faults, and offers high applicability.

[0010] Furthermore, insulating protective covers are provided on both sides of the contact arc extinguishing mechanism.

[0011] Furthermore, the contact arc-extinguishing mechanism includes an arc-extinguishing chamber, which is disposed on the side of the contact arc-extinguishing mechanism facing the first insulating base. The arc-extinguishing chamber allows for rapid extinguishing of the electric arc when the circuit breaker disconnects the circuit, preventing damage to equipment and personnel from the arc.

[0012] Furthermore, the arc-extinguishing mechanism has a moving contact and a stationary contact respectively provided on both sides of the side wall away from the first insulating base. The moving and stationary contacts work together to connect or disconnect the circuit during a break.

[0013] Furthermore, a transmission mechanism is provided between the contact arc-extinguishing mechanism and the operating mechanism. By driving the transmission mechanism through the operating mechanism, the moving contact of the contact arc-extinguishing mechanism can be controlled to contact or separate from the stationary contact, thereby controlling the on / off state of the circuit.

[0014] The beneficial effects of this utility model are:

[0015] 1. The DC series high-voltage circuit breaker of this utility model, by setting a series connection plate, can reduce the segment voltage of each port when multiple ports of the circuit breaker are connected in series, thereby reducing the voltage pressure of different segments through the multi-stage series structure and reducing the occurrence of electrical faults. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal disassembled structure of this DC series high voltage circuit breaker;

[0017] Figure 2 This is a top view of the structure of this DC series high voltage circuit breaker;

[0018] Figure 3 This is a cross-sectional structural schematic diagram of the DC series high voltage circuit breaker;

[0019] Figure 4 This is a schematic diagram of the circuit connection structure of this DC series high-voltage circuit breaker.

[0020] Explanation of reference numerals in the attached drawings: 1. First insulating base; 2. Series connecting plate; 3. Insulating protective cover; 4. Contact arc extinguishing mechanism; 5. Operating mechanism; 6. Second insulating base; 7. Insulating rotating shaft; 8. Insulating middle cover; 9. Insulating upper cover; 10. Arc extinguishing chamber; 11. Moving contact; 12. Stationary contact. Detailed Implementation

[0021] The following will describe the concept and technical effects of this utility model clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of this utility model.

[0022] like Figure 1-4 As shown, a DC series high-voltage circuit breaker includes a first insulating base 1. A contact arc-extinguishing mechanism 4 is detachably mounted on the front side of the first insulating base 1. An operating mechanism 5 is rotatably mounted on the front side of the contact arc-extinguishing mechanism 4. A second insulating base 6 is mounted on the front side of the operating mechanism 5. An insulating shaft 7 is rotatably mounted on the middle of the front side wall of the second insulating base 6. An insulating middle cover 8 is mounted on the front side of the second insulating base 6, and an insulating upper cover 9 is mounted on the front side of the insulating middle cover 8. In use, the first insulating base 1, the second insulating base 6, the insulating middle cover 8, and the insulating upper cover 9 provide insulation protection for the circuit breaker, preventing leakage. Simultaneously, they can disconnect the circuit in case of a short circuit, protecting the circuit. The circuit breaker can be manually controlled via the operating mechanism 5.

[0023] The rear cross-sections of both the first insulating base 1 and the second insulating base 6 are rectangular.

[0024] Several series-connecting plates 2 are provided at the connection points on both sides of the first insulating base 1 and the contact arc-extinguishing mechanism 4. The series-connecting plates 2 are made of pure copper. By setting the series-connecting plates 2, when multiple ports of the circuit breaker are connected in series, the segment voltage of each port is reduced, thereby reducing the voltage pressure of different segments through the multi-stage series structure, reducing the occurrence of electrical faults, and making it highly applicable.

[0025] Insulating protective covers 3 are provided on both sides of the contact arc extinguishing mechanism 4.

[0026] The contact arc extinguishing mechanism 4 includes an arc extinguishing chamber 10, which is disposed on the side of the contact arc extinguishing mechanism 4 facing the first insulating base 1. The arc extinguishing chamber 10 can quickly extinguish the arc when the circuit breaker disconnects the circuit, preventing the arc from causing damage to equipment and personnel.

[0027] The arc-extinguishing mechanism 4 has a moving contact 11 and a stationary contact 12 respectively provided on both sides of the side wall away from the first insulating base 1. The moving contact 11 and the stationary contact 12 work together to connect or disconnect the circuit when it is broken.

[0028] A transmission mechanism is provided between the contact arc-extinguishing mechanism 4 and the operating mechanism 5. By driving the transmission mechanism through the operating mechanism 5, the moving contact 11 of the contact arc-extinguishing mechanism 4 can be controlled to contact or separate from the stationary contact 12, thereby controlling the on / off state of the circuit.

[0029] Working principle: During use, the circuit breaker is insulated and protected by the first insulating base 1, the second insulating base 6, the insulating middle cover 8, and the insulating top cover 9 to prevent leakage. It can also cut off the circuit during a short circuit, protecting the circuit. The circuit breaker can be manually controlled via the operating mechanism 5. The arc-extinguishing chamber 10 quickly extinguishes the arc when the circuit breaker breaks the circuit, preventing damage to equipment and personnel. The moving contact 11 works in conjunction with the stationary contact 12 to connect or disconnect the circuit during a break. The operating mechanism 5 drives the transmission mechanism to control the contact arc-extinguishing mechanism 4 to make or separate the moving contact 11 and the stationary contact 12, thereby controlling the circuit's on / off state. By setting up a series connection plate 2, when multiple ports of the circuit breaker are connected in series, the segment voltage of each port is reduced, thus reducing the voltage pressure of different segments through a multi-stage series structure, reducing the occurrence of electrical faults, and offering high applicability.

[0030] The above embodiments are only some embodiments of this utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the protection scope of this utility model.

Claims

1. A DC series high-voltage circuit breaker, characterized in that: The device includes a first insulating base (1), a contact arc extinguishing mechanism (4) is detachably provided on the front side of the first insulating base (1), an operating mechanism (5) is rotatably provided on the front side of the contact arc extinguishing mechanism (4), a second insulating base (6) is provided on the front side of the operating mechanism (5), an insulating shaft (7) is rotatably provided in the middle of the front side wall of the second insulating base (6), an insulating middle cover (8) is provided on the front side of the second insulating base (6), and an insulating top cover (9) is provided on the front side of the insulating middle cover (8). Several series connecting plates (2) are provided at the connection points between the first insulating base (1) and the two sides of the contact arc extinguishing mechanism (4).

2. The DC series high-voltage circuit breaker according to claim 1, characterized in that... The rear cross-sections of the first insulating base (1) and the second insulating base (6) are both rectangular.

3. The DC series high-voltage circuit breaker according to claim 1, characterized in that... The series connection plate (2) is made of pure copper.

4. The DC series high-voltage circuit breaker according to claim 1, characterized in that... Insulating protective covers (3) are provided on both sides of the contact arc extinguishing mechanism (4).

5. The DC series high-voltage circuit breaker according to claim 1, characterized in that... The contact arc extinguishing mechanism (4) includes an arc extinguishing chamber (10), which is located on the side of the contact arc extinguishing mechanism (4) facing the first insulating base (1).

6. The DC series high-voltage circuit breaker according to claim 1, characterized in that... The contact arc extinguishing mechanism (4) has a moving contact (11) and a stationary contact (12) respectively on the side wall away from the first insulating base (1).

7. The DC series high-voltage circuit breaker according to claim 1, characterized in that... A transmission mechanism is provided between the contact arc extinguishing mechanism (4) and the operating mechanism (5).

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