Control circuit for mobile power supply

Abstract

The utility model discloses a control circuit for a mobile power supply, which comprises switches, indicating lamps and a fuse, the switches comprise a key switch and three-phase air switches, the indicating lamps comprise a first indicating lamp and a second indicating lamp, and the two air switches are connected in series to form a main control loop. The two ends of the main control loop are a wire outlet end used for being connected with a load and a wire inlet end used for being connected with an external power supply, the first indicating lamp is connected to the wire inlet end, the second indicating lamp is connected to the wire outlet end, and each phase wire of the wire outlet end is grounded through the key switch; the main loop is formed through the two air switches connected in series, double insurance of on-off operation of the switches is guaranteed, whether electricity exists or not is indicated through the indicator lamp, use is convenient, manual discharging is carried out on the main loop and the load connected with the wire outlet end, and operation safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a control circuit for a mobile power supply. Background Art

[0002] For the maintenance work of mine electrical equipment, the electrical equipment needs to be tested with power on usually. During the test process, the power cut and power on operation procedures need to be strictly implemented. It is necessary to meet the requirements of secondary power cut and power on, and it is also necessary to perform the operations of checking the electricity and discharging the equipment after the test. When discharging, it is also necessary to ensure that the protective earthing and working earthing do not affect each other. Originally, one person was responsible for the power cut and power on of the distribution cabinet, and one person was responsible for the power cut and power on of the feed switch. At the same time, during the actual operation process, one person needed to check and test the equipment for faults. The three-person operation greatly restricted the work efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is: the problem that the existing secondary power cut and power on operation requires the cooperation of multiple people and reduces the work efficiency.

[0004] To solve the above technical problem, a technical solution provided by the utility model is: a control circuit for a mobile three-phase power supply, including a switch, an indicator light and a fuse. The characteristics are: the switch includes a key switch and a three-phase air switch, the indicator light includes a first indicator light and a second indicator light. The two air switches are connected in series to form a main control loop. The two ends of the main control loop are an outgoing line end for connecting with a load and an incoming line end for connecting with an external power supply. The first indicator light is connected to the incoming line end, the second indicator light is connected to the outgoing line end, and each phase line of the outgoing line end is grounded through the key switch.

[0005] Further, fuses are connected in series to both the first indicator light and the second indicator light.

[0006] Further, the colors of the first indicator light and the second indicator light are different.

[0007] The beneficial effects of the utility model are:

[0008] In this application, a main circuit is formed by two air switches connected in series to ensure double insurance for the on-off operation of the switch, and the indicator light is used to indicate whether there is electricity, which is convenient to use. At the same time, manual discharging is carried out on the main circuit and the load connected to the outgoing line end to ensure the operation safety.

[0009] The purpose, characteristics and advantages are more obvious and easy to understand. The following specific preferred embodiments are given and detailed descriptions are made in conjunction with the accompanying drawings as follows. Brief Description of the Drawings

[0010] To more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the attached drawings required for the description of the embodiments. Obviously, the attached drawings in the following description are only one of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these drawings.

[0011] Figure 1 This is the circuit diagram of the present application. Detailed implementation manners

[0012] The following will describe the embodiments of the present utility model in more detail with reference to the attached drawings. Although some embodiments of the present utility model are shown in the attached drawings, it should be understood that the present utility model can be implemented in various forms and should not be construed as limited to the embodiments described herein. Instead, these embodiments are provided to more thoroughly and completely understand the present utility model. It should be understood that the attached drawings and embodiments of the present utility model are only for exemplary purposes and are not used to limit the protection scope of the present utility model.

[0013] It should be understood that the various steps recorded in the method implementation manners of the present utility model can be executed in different orders and / or executed in parallel. In addition, the method implementation manners can include additional steps and / or omit the steps shown. The scope of the present utility model is not limited in this regard.

[0014] The names of the messages or information exchanged between multiple devices in the implementation manners of the present utility model are only for illustrative purposes and are not used to limit the scope of these messages or information. Embodiment

[0015] As Figure 1 shown, a control circuit for a mobile three-phase power supply, two three-phase air switches QF1 and QF2 are connected in series to form a main control loop. The two ends of the main control loop are an outgoing line terminal for connecting to a load and an incoming line terminal for connecting to an external power supply. The first indicator light HL1 is connected to the incoming line terminal, the second indicator light HL2 is connected to the outgoing line terminal, and each phase line U, V, W of the outgoing line terminal is grounded through push-button switches SB1, SB2, and SB3.

[0016] Among them, fuses FU1 and FU1 are connected in series with both the first indicator light HL1 and the second indicator light HL2; the first indicator light HL1 is green, and the second indicator light HL2 is red.

[0017] In use, connect the incoming line terminal of the main control circuit to the upper-level power distribution cabinet. The upper-level power distribution cabinet and the feeder switch are powered on in sequence. The first indicator light HL1 lights up, indicating that the three-phase lines U1, V1, and W1 at the incoming line terminal are energized. Connect the three-phase lines U2, V2, and W2 at the outgoing line terminal to the electrical equipment. When powering on, push the air switches QF1 and QF2 to the ON position in sequence. The main circuit is conducted, and the closing indicator light HL2 is energized and lights up. U2, V2, and W2 are energized, and the electrical equipment is energized.

[0018] After the maintenance of the electrical equipment is completed and the secondary power supply ends, the maintenance personnel inform the supervisor to cut off the power. The supervisor pushes the air switches QF2 and QF1 to the OFF position in sequence. U2, V2, and W2 lose power, and the closing indicator light HL2 goes out. Then, cut off the power of the upper-level feeder switch and the power distribution cabinet in sequence. The opening indicator light HL1 goes out. Press SB1, SB2, and SB3 in sequence to discharge the main circuit to the ground.

[0019] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here. Various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A control circuit for a mobile power source, comprising a switch, an indicator light and a fuse, characterized in that: The switch includes a push button switch and a three-phase air switch, and the indicator light includes a first indicator light and a second indicator light. The two air switches are connected in series to form a main control circuit. The two ends of the main control circuit are an output terminal for connecting to a load and an input terminal for connecting to an external power supply. The first indicator light is connected to the input terminal, and the second indicator light is connected to the output terminal, and each phase line of the output terminal is grounded through a push button switch.

2. A control circuit for a mobile power source according to claim 1, characterized in that: The first indicator light and the second indicator light are both connected in series with a fuse.

3. A control circuit for a mobile power source according to claim 2, characterized in that: The first indicator light and the second indicator light have different colors.

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