Description
Description of High Voltage Electrical Switchgear
A box-type transformer, commonly known as a compact substation, integrates traditional transformers, high voltage electrical switchgear, and low-voltage control equipment within a single enclosed box-type housing. This innovative design delivers outstanding advantages such as small size, light weight, low noise, minimal energy loss, and high reliability, making it widely adopted in residential communities, commercial centers, light rail stations, airports, industrial plants, enterprises, hospitals, schools, and other key locations.
As an integrated power distribution solution, the compact substation’s core lies in the organic combination of three key elements: power transformers, high voltage electrical switchgear, and low voltage control devices. Its operating principle involves assembling critical components—including a pressure-start system, armored cables, substation automation systems, DC systems, and supporting technical equipment—in a predefined sequence. All these parts are then installed into a fully sealed, toughened box structure that provides comprehensive protection against water, dust, and rodent damage. This integration not only ensures operational stability but also simplifies on-site installation and maintenance. Today, box-type transformers equipped with advanced high voltage electrical switchgear have become indispensable in modern power engineering construction, driving efficient and safe power distribution across diverse sectors.
Parameter of High Voltage Electrical Switchgear
| Description | Unit | Data | |
| HV compartment | Rated Frequency | Hz | 50 |
| Rated voltage | kV | 6 10 35 | |
| Max operating voltage | kV | 6.9 11.5 40.5 | |
| Power frequency withstand voltage | kV | 32/36 42/48 95/118 | |
| (phase to ground and between phases)/ disconnector fracture | |||
| lightning impulse withstand voltage | kV | 60/70 75/85 185/215 | |
| (phase to ground and between phases)/ disconnector fracture | |||
| Rated current | A | 400 630 | |
| Rated short-time withstand current | kA | 12.5(2S) 16(2S) 20(2S) | |
| Rated peak withstand current | kA | 32.5 40 50 | |
| LV compartment | Rated voltage | V | 380 200 |
| Rated current of main circuit | A | 100~3200 | |
| Rated short-time withstand current | kA | 15 30 50 | |
| Rated peak withstand current | kA | 30 63 110 | |
| Branch current | A | 10 ~ 800 | |
| Number of branch circuits | / | 1 ~ 12 | |
| Compensation capacity | kVA R | 0 ~ 360 | |
| Transformer | Rated capacity | kVA | 50~2000 |
| hort-circuit impedance | % | 4 6 | |
| Tapping range | / | ±2×2.5% ±5% | |
| Connection group symbol | / | Yyn0 Dyn11 | |
Feature of High Voltage Electrical Switchgear
Our High Voltage Electrical Switchgear stands out in the industry with its exceptional design and performance, incorporating the core advantages of modern packaged substations. It boasts a more rational internal structure, resulting in a compact footprint that significantly saves installation space compared to traditional equipment. Moreover, it features straightforward and user-friendly operation, facilitating rapid assembly and reducing on-site construction time and labor costs.
Additionally, this high voltage electrical switchgear offers versatile and wide-ranging applications, adapting to diverse power distribution scenarios across industries. Furthermore, it supports flexible combinations—users can customize configurations based on specific project requirements to meet varying power supply needs. Most importantly, it ensures high operational safety and exceptional stability, providing reliable power support for critical infrastructure and industrial operations, making it an ideal choice for various industrial and commercial power distribution needs.























































