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The problem of selecting a casing box for a box transformer

7.1 Regarding the grading issue of the casing box:; The issue of the casing of the box transformer has become more complex due to the influence of standards. Originally, there was no mention of the classification of the box transformer in the technical conditions for ordering box transformers formulated by the Ministry of Electric Power of China or the standards for composite substations formulated by the Ministry of Machinery...
Date：2024-03-22
The problem of selecting standardized cabinets for box transformers

Due to the mandatory use of standardized cabinets in the past to avoid type testing, four low-voltage cabinets are generally installed in the low-voltage room, 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 large volume...
Date：2024-03-22
The superiority of intelligent control devices for high-voltage switchgear

2.1 The superiority of displaying the actual J=working state; 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 is performed once...
Date：2024-03-22
The shortcomings of traditional high-voltage switchgear in terms of control

1.1 Shortcomings in displaying actual work status; 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. It can only be known to the on duty personnel...
Date：2024-03-22
What are the conditions for differential protection of transformer main transformer

1) Main transformer and bushing lead out line fault. 2) Protection secondary line fault. 3) Current transformer open circuit or short circuit. 4) Internal fault of the main transformer....
Date：2024-03-22
瓦斯保护的变压器范围是什么

1)变压器内部的多相短路。2)匝间短路，绕组与铁芯或外壳短路。3)铁芯故障。4)油面下将或漏油。5)分接开关接触不良或导线焊接不牢固。...
Date：2023-12-28
干式变压器的过载能力

干式变压器的过载能力与环境温度、过载前的负载情况(起始负载)、变压器的绝缘散热情况、发热时间常数等有关。若有需要，可向生产厂索取干式变压器的过负荷曲线。 (1)选择、...
Date：2023-12-20
干式变压器特征

(1)无油、无污染、难然阻燃、自熄防火。 (2)绝缘温升等级高：F级绝缘，变压器温升可达100K。SC(B)10系列温升下降了17K，进一步提高了变压器的过载能力和使用寿命。&n...
Date：2023-11-29
箱变低压总开关的作用问题

箱变本来应该是一个简易电气设备，因此元件尽量减少，母排接头，特别是总母线回路是重载接头应尽量减少，从国外进口箱变可见都是容量不大，结构简单的产品。电业安全规程规定在人员接触前必须断开电源，...
Date：2023-11-20
箱变内变压器要装瓦斯继电器问题

箱变本来应该是一种简易产品，但是现在有愈搞愈复杂的趋势。现在有些地区规定变压器容量超过800kVA时要装瓦斯继电器，这样一来高压侧就必须装断路器，装了断路器就必须要解决操作电源问题，这样本来是一种简易...
Date：2023-10-30

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