High-voltage switching device

Abstract

A high-voltage switching device is characterized by comprising a first power supply, a second power supply and an interlocking device, and the interlocking device comprises a circuit breaker QF1 and a circuit breaker QF2. The first power supply is connected with the circuit breaker QF1 through a knife switch Q1, the second power supply is connected with the circuit breaker QF2 through a knife switch Q2, and the circuit breaker QF1 and the circuit breaker QF2 supply power to a load after being connected together; the knife switch Q1 is connected with a voltage transformer TV1 through a circuit breaker 1FU and is used for detecting whether the first power supply is electrified or not so as to switch on a switch corresponding to the interlocking device; and the knife switch Q2 is connected with the voltage transformer TV2 through the circuit breaker 2FU and is used for detecting whether the second power supply is electrified so as to switch on a switch corresponding to the interlocking device.

Description

Technical Field

[0001] The utility model relates to the field of power supply switching, and particularly relates to a high-voltage switching device. Background Art

[0002] At present, the power supply switching devices on the market are all applicable to low voltage levels, that is, levels of 0.4 kV and below. When the voltage reaches 690 V and above, only some joint-venture brands can achieve it, with high costs and complex structures. Content of the Utility Model

[0003] To solve the above problems, the present technical solution provides a high-voltage switching device.

[0004] To achieve the above purpose, the present technical solution is as follows:

[0005] A high-voltage switching device includes a first power supply and a second power supply, and further includes an interlocking device. The interlocking device includes a circuit breaker QF1 and a circuit breaker QF2;

[0006] The first power supply is connected to the circuit breaker QF1 through a knife switch Q1, the second power supply is connected to the circuit breaker QF2 through a knife switch Q2, and the circuit breaker QF1 and the circuit breaker QF2 are connected together to supply power to a load;

[0007] The knife switch Q1 is connected to a voltage transformer TV1 through a circuit breaker 1FU, and is used to detect whether the first power supply is powered on to conduct the corresponding switch of the interlocking device;

[0008] The knife switch Q2 is connected to a voltage transformer TV2 through a circuit breaker 2FU, and is used to detect whether the second power supply is powered on to conduct the corresponding switch of the interlocking device.

[0009] In some embodiments, the voltage transformer TV1 includes three induction coils, and each induction coil is respectively connected to three endpoints of a controller KZQ through a circuit breaker 1FU1, a circuit breaker 1FU2, and a circuit breaker 1FU3. The controller KZQ is linked with the interlocking device.

[0010] In some embodiments, the voltage transformer TV2 includes three induction coils, and each induction coil is respectively connected to three endpoints of the controller KZQ through a circuit breaker 2FU1, a circuit breaker 2FU2, and a circuit breaker 2FU3.

[0011] The beneficial effects of the present application are:

[0012] This application collects the voltages of two power sources through two voltage transformers. If any one of the power sources is powered on, the corresponding circuit breaker is driven to turn on through an interlocking device, and then this power source will work to supply power to the load, realizing automatic switching and delivery. The structure is simple and the cost is lower compared with others. Brief Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for description in the embodiments.

[0014] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0015] Figure 2 is a schematic structural diagram of the voltage transformer in the embodiment of the present invention. Detailed Embodiments

[0016] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the following further details the present invention with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] The currently generally adopted power source switching device is applicable to the 400V voltage level. When the voltage is 690V, 800V or 1000V, only joint-venture brands are available, and domestic manufacturers basically do not produce them.

[0018] This application aims to solve the problem that fast switching between two power sources can also be achieved at high voltage levels, ensure the reliability and continuous power supply of the system, and ensure the normal operation of equipment and loads. Please refer to Figure 1 As shown, a high-voltage switching device includes a first power source (normal power source) and a second power source (standby power source), and further includes an interlocking device. The interlocking device includes a circuit breaker QF1 and a circuit breaker QF2;

[0019] The first power source is connected to the circuit breaker QF1 through a knife switch Q1, the second power source is connected to the circuit breaker QF2 through a knife switch Q2, and the circuit breaker QF1 and the circuit breaker QF2 are connected together to supply power to the load;

[0020] The knife switch Q1 is connected to a voltage transformer TV1 through a circuit breaker 1FU, and is used to detect whether the first power source is powered on to turn on the corresponding switch of the interlocking device;

[0021] The knife switch Q2 is connected to a voltage transformer TV2 through a circuit breaker 2FU, and is used to detect whether the second power source is powered on to turn on the corresponding switch of the interlocking device.

[0022] The principle of this application is simple and the cost is lower. It mainly consists of two knife switches (Q1, Q2), two circuit breakers (QF1, QF2), two groups of voltage transformers (TV1, TV2), a controller, a mechanical interlocking device and circuit breakers (1FU, 2FU).

[0023] The purpose of the present utility model is to solve the problem that when at a high voltage level, stable and reliable automatic switching of two power sources can be achieved, thereby effectively ensuring the continuity of the power supply system.

[0024] Reference Figure 2 , the voltage transformer TV1 includes three induction coils, and each induction coil is respectively connected to three endpoints of the controller KZQ through the circuit breaker 1FU1, the circuit breaker 1FU2 and the circuit breaker 1FU3. The controller KZQ is linked with the interlocking device.

[0025] The voltage transformer TV2 includes three induction coils, and each induction coil is respectively connected to three endpoints of the controller KZQ through the circuit breaker 2FU1, the circuit breaker 2FU2 and the circuit breaker 2FU3.

[0026] Reference Figure 2 , this figure is the electrical control schematic diagram. In the figure, 1FU1~3 and 2FU1~3 are circuit breakers for short-circuit protection of the control circuit. This scheme converts the voltage through the voltage transformers TV1 and TV2 into a voltage suitable for the operation of the controller. When the normal power supply loses power, that is, there is no voltage on the primary side of the voltage transformer TV1, and the power receiving ends NA, NB, NC, NN of the controller KZQ cannot collect the normal power supply. At this time, as long as the standby power supply is powered, the low voltage converted by the voltage transformer TV2 is connected to the power receiving ends RA, RB, RC, RN of the controller. The controller KZQ can automatically switch to the standby power supply end by collecting the standby power supply, thus effectively solving the automatic switching of two high voltage levels.

[0027] The above are only the preferred embodiments of this application and are not used to limit the scope of implementation of this application. All other embodiments with the same or similar principles and basic structures as this application are within the protection scope of this application.

Claims

1. A high voltage switching device, characterized in that: It includes a first power source and a second power source, and also includes an interlocking device, wherein the interlocking device includes a circuit breaker QF1 and a circuit breaker QF2; The first power supply is connected to the circuit breaker QF1 through the knife switch Q1, and the second power supply is connected to the circuit breaker QF2 through the knife switch Q2. The circuit breaker QF1 and the circuit breaker QF2 are connected together to supply power to the load; The knife switch Q1 is connected to the voltage transformer TV1 through the circuit breaker 1FU, and is used to detect whether the first power supply has power, so as to turn on the switch corresponding to the interlocking device; The knife switch Q2 is connected to the voltage transformer TV2 through the circuit breaker 2FU, and is used to detect whether the second power supply has power, so as to turn on the switch corresponding to the interlocking device.

2. A high voltage switching device according to claim 1, characterized in that: The voltage transformer TV1 includes three induction coils, each of which is connected to three terminals of the controller KZQ through the circuit breaker 1FU1, the circuit breaker 1FU2 and the circuit breaker 1FU3 respectively, and the controller KZQ is linked with the interlocking device.

3. A high voltage switching device according to claim 2, characterized in that: The voltage transformer TV2 includes three induction coils, each of which is connected to three terminals of the controller KZQ via a circuit breaker 2FU1, a circuit breaker 2FU2 and a circuit breaker 2FU3.

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