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Case sharing of high voltage protection device detected by sealing detector

The high voltage protection device plays an important role in protecting the normal and safe operation of various devices in the high voltage cabinet, such as short circuit protection, overload protection, single-phase grounding protection and so on. Due to the particularity of the device, people have very high requirements for its sealing. If the high-voltage protection device is not sealed, the seal is not qualified, the device will have the risk of leakage in the process of use, or even irreparable. Therefore, manufacturers will test the sealing performance of the device before leaving the factory. Due to its particularity, different manufacturers will have their own methods for the sealing performance test of high voltage protection devices, but the accuracy of the test results is not satisfactory.

Among them, Harris technology is very experienced in the sealing test of high voltage protection devices. For different products, different types and sizes of high-voltage protection devices, there are mature sealing detection schemes, which are suitable for different high-voltage protection devices.

Sealing tester of high voltage protection device

1、 Display of testing difficulties of high voltage protection device

1. The volume of the high voltage protection device is large, and the appearance of the device is rich. Just above is the grid with the same length and distance. There are several butt twists on one side of the device, and the overall structure is precise;

2. The special structure of the high-voltage protection device makes it difficult to detect its sealing performance. In the early design and production process of the device, the shell of the device will be treated specially, and the butt joint and the connecting wire play the role of connecting the outside, so it is impossible to use the mold to conduct the fully closed detection;

High voltage protection device

2、 The breakthrough of testing difficulties of high voltage protection device

Mold tooling for sealing test of high voltage protection device

1. According to the special shape of the high-voltage electric protection device, Harris technology specially uses the sealing tester integrated with tooling and mold, and customizes a tooling fixture for the high-voltage electric protection device. Because there is a grille with air outlet on the top of the device, and the bottom is in a closed state, it can inflate into the grille, and its sealing can be judged by the change of internal air pressure.

Details of sealing test for high voltage protection device

2. During the detection, as long as the high-voltage protection device is placed in the mold, the program is set, and the upper mold closes the grid, when the instrument starts, it will automatically inflate the grid above the device, and the air pressure of the instrument will slowly rise. When the air pressure is charged to the set value, the interior of the high-voltage protection device will be in a constant state, At this time, the induction tube will determine the flow value to detect whether the internal air flow of the device meets the standard.

Display of sealing tester for high voltage protection device

3、 Parameter table of sealing tester for high voltage protection device

Operation interface of high voltage protection device sealing detector

1. High flexibility, the function can be added or deleted according to the demand.

2. It has strong expansibility and can quickly form multi-channel test, which greatly shortens the development cycle of automation.

3. The analysis and control system can adopt industrial control computer plus control card or embedded system to facilitate the docking and implementation of MES system.

4. The screen size supports customization, and the embedded system is equipped with 7 "customizable 10.4" 12 "15" as standard; Industrial computer mode, screen size is not limited.

5. The standard configuration adopts Harris full function valve island, positive and negative pressure forms and 8 test methods; Two pressure forms and five test methods can be written into more than 20 test functions.

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