Henan Hengyu Electric Group Co., Ltd.
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The problem of selecting a casing box for a box transformer
2025-02-07
The issue of the casing of box transformers has become more complex due to the influence of standards. Originally, there was no mention of casing classification in the technical conditions for ordering box transformers formulated by the Ministry of Electric Power of China or the standards for modular substations formulated by the Ministry of Machinery. However, since the introduction of IEC-1330 (1995 edition) "High voltage/low voltage pre installed box substations" into China and the equivalent Chinese GB/T17467-1998 standard, there have been provisions on casing classification. The article on casing in IEC-130 (1995 edition) is now excerpted:
The problem of selecting standardized cabinets for box transformers
2025-02-07
Due to the mandatory use of standardized cabinets in the past to avoid type testing, four low-voltage cabinets are generally installed in low-voltage rooms, forming iron cabinets with a small appearance. Looking back at foreign products, the high-voltage side is an SF6 switchgear, and the low-voltage side is not installed in the cabinet but directly assembled with components, resulting in a very small volume.
The superiority of intelligent control devices for high-voltage switchgear
2025-02-07
The primary wiring diagram of the high-voltage switchgear is displayed using dynamic modules. Real time dynamic simulation display is formed by graphic symbols of circuit breakers, isolation cars, busbars, current transformers, voltage transformers, and grounding switches. This dynamic simulation wiring diagram can dynamically display the opening/closing of circuit breakers, opening/closing of grounding switches, energy storage status, working/testing position of cars, and dynamic anti false flashing prompts of circuit breakers and grounding switches during the process. The on duty personnel can intuitively and accurately know the current status of the main circuit of the high-voltage switchgear, thereby obtaining more intuitive, rich, and accurate status information.
The shortcomings of traditional high-voltage switchgear in terms of control
2025-02-07
The door of the high-voltage switchgear is always sealed during operation. Traditional high-voltage switchgear uses organic glass pasted on the cabinet door to indicate the primary wiring of the high-voltage switchgear. This indication method is static. Only the on duty personnel can know the function of this high-voltage switchgear, and cannot know the actual working status of the primary components inside this high-voltage switchgear.
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