XGN66-12 (Z) Box-Type AC Metal-Enclosed Switchgear
Product Detail
XGN66-12 (Z) Box-Type AC Metal-Enclosed Switchgear
1. Product Overview
The XGN66-12 (Z) box-type AC metal-enclosed switchgear is designed for use in three-phase AC 50Hz systems with rated voltages of 3, 6, and 12 kV for power reception and distribution. It employs ZN21-12 and ZN28-12 series vacuum circuit breakers as the main switches, with optional installation of VS1, VD4, or ZN68 series models. The isolating switches utilize GN30-10 series rotary types.
Featuring advanced electronic components and innovative structural design, this modular unit offers easy assembly, low operating force, and convenient maintenance. Its reliable “Five Protection Lockout” system combines compact size, sophisticated housing construction, and fully enclosed compartments. Each compartment — including the instrument room, busbar room, circuit breaker room, and cable room — is independently sealed with natural ventilation outlets for pressure relief, ensuring long service life, minimal maintenance requirements, user-friendly operation, and high reliability.
As a next-generation solution for 12kV fixed switchgears, it complies with the “Five Protection Lockout” standards mandated by China’s Ministry of Machinery Industry and Ministry of Electric Power. The equipment meets both National Standard GB3906-91 (“AC Metal-Enclosed Switchgear for 3–35 kV”) and GB/T11022-1999 (“Common Technical Requirements for High-Voltage Switchgear and Control Equipment”).
2. Main Technical Parameters
| Item | Unit | Parameter |
|---|---|---|
| Rated voltage | kV | 7.2, 12 |
| Dielectric level — 1-minute power frequency withstand voltage test | kV | 32–42 (Isolation gap: 48 kV) |
| Dielectric level — Lightning impulse withstand voltage | kV | 60–75 (Isolation voltage: 85 kV) |
| Rated frequency | Hz | 50 |
| Main busbar rated current | A | 630, 1250, 2000, 2500, 3150 |
| Branch bus rated current | A | 315, 630, 1250, 1600, 2000, 2500, 3150 |
| 4-second thermal stability current (effective value) | kA | 16, 20, 25, 31.5, 40 |
| Rated dynamic stability current (effective value) | kA | 40, 50, 63, 80, 100 |
| Levels of protection | IP3X | |
| External Dimensions (Height × Width × Depth) | mm | 1100 × 1200 × 2600 |
Note: 1. Rated current ≥2000 A; cabinet width 1200 mm. 2. Overhead incoming/outgoing line cabinet depth 1650 mm. 3. Bypass-equipped cabinet depth 1800 mm.
HXGN-12 Ring Main Unit
1. Product Overview
The HXGN-12 ring main unit is an indoor metal-enclosed switchgear designed for 3–10 kV single busbar and single-line segmented systems to receive and distribute electrical power. As a next-generation high-voltage electrical product tailored for urban renovation and construction, its technical specifications comply with GB3906 “3–35 kV AC Metal-Enclosed Switchgear,” the international IPC298 standard, and the “Five Protection” requirements specified in both the Mechanical and Electrical sections.
It achieves an IP3X protection rating, featuring compact size, lightweight construction, simple operation, low operating force, clearly defined breaking points, enhanced safety and maintenance convenience, stable reliability, and, when required, three-phase linkage capability. Comparative analysis with international standards and expert evaluation confirm that its core technologies meet contemporary international benchmarks for similar products.
2. Main Application
Ring main units are designed for three-phase power distribution systems with a rated voltage of 10 kV and a rated frequency of 50 Hz, suitable for use in factories, mines, residential communities, high-rise buildings, schools, parks, and other locations to receive and distribute electrical energy. They can be employed for both ring network power supply and terminal power supply applications.
3. Environmental Conditions for Use
- 3.1 The altitude shall not exceed 1000 m;
- 3.2 The ambient temperature shall not exceed +40°C nor fall below -25°C;
- 3.3 Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%;
- 3.4 The seismic intensity does not exceed 8 degrees;
- 3.5 This product is intended for use in environments free from fire and explosion hazards, with severe penalties for contamination, chemical corrosion, or intense vibration.
Our Commitment
We create high-quality products that give our customers complete peace of mind.
The quickest way to identify the best solution for your needs is to speak with one of our team of experts. We’ll be able to quickly narrow down your options and give you objective advice on the best fit.