Practical training device for meter installation and power connection of high-voltage metering cabinet

Abstract

The utility model relates to the technical field of practical training, and discloses a high-voltage metering cabinet meter installation and power connection practical training device comprising a cable maintenance channel chamber, the top of the cable maintenance channel chamber is fixedly connected with a PT handcart chamber, the top of the PT handcart chamber is fixedly connected with a metering chamber, and the interior of the metering chamber is fixedly connected with a three-phase three-wire intelligent meter. The left side and the right side of the interior of the metering chamber are fixedly connected with combined junction boxes, the interior of the PT handcart chamber is fixedly connected with a first PT handcart, the rear side of the first PT handcart is electrically connected with a bus, the other end of the bus is fixedly connected with a plurality of insulators, the rear side of the interior of the PT handcart chamber is fixedly connected with a current transformer, and the rear side of the interior of the PT handcart chamber is fixedly connected with a power supply. And the exterior of the insulator is fixedly connected to the interior of the metering chamber. According to the utility model, the training practical operation environment of trainees is consistent with the actual working environment, and the meter installation and power connection skills of the trainees can be more efficiently improved.

Description

Technical Field

[0001] This utility model relates to the field of training technology, and in particular to a high-voltage metering cabinet meter installation and power connection training device. Background Technology

[0002] Currently, both domestically and internationally, training on high-voltage metering installation and connection skills generally employs simulated cabinets for instruction and practice. However, trainees cannot truly grasp the cabinet structure of a real high-voltage metering cabinet and the practical environment for meter installation and connection. Furthermore, the cabinet's outer shell is designed to be transparent so that trainees can observe and understand the internal structure of the high-voltage metering cabinet.

[0003] This device is based on a real 10kV metering cabinet (KYN28A-12 medium-voltage cabinet type), and is equipped with simulated 10kV voltage transformers and 10kV current transformers with realistic appearance. It uses virtual load digital power supply technology to realize the training and assessment of meter installation, power supply, debugging, energy meter verification and uninterrupted meter replacement for high-voltage metering cabinets.

[0004] In order to address the training methods and operating environment of existing high-voltage metering cabinet installation and connection training devices, and to incorporate a pre-power-on safety detection module that can accurately eliminate dangerous wiring errors such as voltage short circuits and current open circuits, while providing corresponding warnings through the operating software interface and triggering audible and visual alarms and signal indications in the cabinet, a new high-voltage metering cabinet installation and connection training device is proposed to solve the above-mentioned problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a high-voltage metering cabinet installation and power connection training device, which aims to improve the training methods and operating environment of some devices in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-voltage metering cabinet installation and connection training device includes a cable maintenance passage chamber. A PT truck chamber is fixedly connected to the top of the cable maintenance passage chamber. A metering chamber is fixedly connected to the top of the PT truck chamber. A three-phase three-wire smart meter is fixedly connected inside the metering chamber. A junction box is fixedly connected to both the left and right sides inside the metering chamber. A PT truck is fixedly connected inside the PT truck chamber. A busbar is electrically connected to the rear side of the PT truck. Multiple insulators are fixedly connected to the other end of the busbar.

[0008] As a further description of the above technical solution:

[0009] A current transformer is fixedly connected to the rear of the PT truck compartment, and the insulator is fixedly connected to the interior of the metering chamber.

[0010] As a further description of the above technical solution:

[0011] The cable maintenance access room is equipped with observation windows fixedly connected to each of its four external corners, and a safety detection module is fixedly connected to the interior of the cable maintenance access room.

[0012] This utility model has the following beneficial effects:

[0013] In this invention, the training environment for trainees is ensured to be consistent with the actual working environment, which can more efficiently improve trainees' meter installation and power connection skills. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a high-voltage metering cabinet power connection training device proposed in this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of a high-voltage metering cabinet power connection training device proposed in this utility model.

[0016] Legend:

[0017] 1. Cable maintenance access room; 2. PT truck room; 3. Metering room; 4. Three-phase three-wire smart meter; 5. Combined junction box; 6. Observation window; 7. PT truck one; 8. Safety detection module; 9. Insulator; 10. Current transformer; 11. Busbar. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1 to 2The device uses a real 10kV metering cabinet, model KYN28A-12 medium-voltage cabinet. Metering room 3 mainly houses a three-phase three-wire smart meter 4, a load control terminal, and a junction box 5. Trainees can complete wiring training between the three-phase three-wire smart meter 4, the load control terminal, and the junction box 5 in this area. PT truck room 2: The PT truck is an important component of the high-voltage metering device, mainly providing voltage signals for the metering circuit. Cable maintenance passage room 1: This part is a component of the actual high-voltage metering cabinet. During meter installation and connection training, trainees do not need to operate this part. To make full use of this space, the safety detection module 8, which serves the meter installation and connection testing section, is placed here.

[0020] The front doors of both the metering room 3 and the PT truck room 2 are equipped with observation windows 6, allowing trainees to directly observe the internal structure of the cabinet. The current transformer 10 is also a crucial component of high-voltage metering, primarily providing current signals to the metering circuit. Four transparent observation windows 6 are located on the side of the cabinet, allowing trainees to visually understand the installation methods of the internal busbar 11, PT truck 7, insulators 9, etc.

[0021] The training device is designed using the typical primary main wiring method of a real high-voltage metering cabinet. As can be seen from the main wiring diagram, the cabinet mainly consists of PT handcart 7, current transformer 10, and a live display.

[0022] The training device operates by default with intermediate relay JK1 in normal mode, where the secondary voltage and current signals of the voltage transformer (PT) and current transformer are directly connected to the three-phase meter for measurement. When intermediate relay JK1 activates, the meter's wiring is switched to the safety detection module, which then performs detection and analysis on the meter's wiring. The safety detection and analysis mainly includes voltage short-circuit detection and current open-circuit detection.

[0023] Voltage short-circuit detection primarily checks for short circuits between phase A, phase B, phase C, and the neutral wire. The logic sequence for phase A voltage detection is as follows: JK11 is closed, then JK14 is closed. If there is no short circuit, the analysis result is 0, indicating normal operation; a result of 1 indicates a short circuit between phase A and phase B. Then JK15 is closed. If there is no short circuit, the analysis result is 0, indicating normal operation; a result of 1 indicates a short circuit between phase A and phase C. Finally, JK16 is closed. If there is no short circuit, the analysis result is 0, indicating normal operation; a result of 1 indicates a short circuit between phase A and the neutral wire (N phase). The analysis principle for other phases is the same.

[0024] The principle of open-circuit current detection is illustrated using phase A current as an example. After the training device enters detection mode, the high-side IA+ and low-side IA- of phase A current at the end of the electricity meter are connected to safety detection module 8. If there is no open circuit, the analysis logic result is 1, indicating normal operation; a result of 0 indicates an open circuit in phase A current. The detection and analysis principles for other phases are the same as above.

[0025] Working principle: In normal operation mode, PT truck 7 provides voltage signals to the metering circuit, and current transformer 10 provides current signals to the metering circuit. These signals are directly connected to the three-phase three-wire smart meter 4 for measurement. Trainees can observe the internal structure and equipment operation through the observation window 6 at the front door of the metering room 3 and PT truck room 2.

[0026] When the detection mode is required, intermediate relay JK1 activates, switching the power meter's wiring to the safety detection module. Safety detection module 8 then begins detecting and analyzing voltage and current signals. Voltage short-circuit detection sequentially checks for short circuits between phases A, B, and C and the neutral wire. Taking phase A as an example, JK11, JK14, JK15, and JK16 close sequentially to detect whether a short circuit exists between phase A and phases B, C, and N. The logical result for each detection step is 0 indicating normal operation and 1 indicating a short circuit.

[0027] Simultaneously, the current open-circuit detection module 8 detects the current of phase A and analyzes the connection status between IA+ and IA-. If the analysis result is 1, it indicates a normal connection; if it is 0, it indicates an open circuit in phase A. The current detection logic for other phases is the same as that for phase A.

[0028] Through these tests, trainees can complete wiring training and fault detection analysis of the equipment inside the high-voltage metering cabinet, ensuring the safe operation of the device and the accuracy of metering.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-voltage metering cabinet installation and connection training device, comprising a cable maintenance passageway (1), characterized in that: The top of the cable maintenance passage room (1) is fixedly connected to a PT truck room (2), the top of the PT truck room (2) is fixedly connected to a metering room (3), the inside of the metering room (3) is fixedly connected to a three-phase three-wire smart meter (4), the inside of the metering room (3) is fixedly connected to a combined junction box (5) on both the left and right sides, the inside of the PT truck room (2) is fixedly connected to a PT truck (7), the rear side of the PT truck (7) is electrically connected to a busbar (11), and the other end of the busbar (11) is fixedly connected to multiple insulators (9).

2. The high-voltage metering cabinet power connection training device according to claim 1, characterized in that: A current transformer (10) is fixedly connected to the rear side of the PT truck compartment (2), and the insulator (9) is fixedly connected to the outside of the metering chamber (3).

3. The high-voltage metering cabinet power connection training device according to claim 2, characterized in that: The cable maintenance access room (1) is fixedly connected to four external corners with observation windows (6), and a safety detection module (8) is fixedly connected inside the cable maintenance access room (1).

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