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China XGN (XGTD6)-12(2Gas Insulated Metal-Enclosed Switchgear - Reliable Suppliers & Factory Solutions
General
The primary live parts and switches of the switchgear are enclosed in a stainless steel casing, which protects them from external environmental influences. The switchgear employs a modular design, allowing for arbitray arrangement according to different design schemes to achieve combinations of common-box and expandable units. This meets the demand for compact switchgear in various secondary distribution substation. It can be widely applied in small secondary distribution stations, box-type switchgear stations, industrial and mining enterprises, airport, railways, commercial district, high-rise building, highways, subways, tunnels and other places with harsh natural conditions.
Standard
The product quality assurance is based on the continuous improvement of research, development, design, and production processes in compliance with the requirements of the quality system. It fully complies with the latest versions or their revised versions of the following standards, specifications, and guidelines, and is not limited to these.
| IEC62271-200 | AC metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV. |
| EN50181 | Insertion bushings for equipment rated at voltages from 1 kV to 52 kV and currents from 250 A to 2500 A. |
| GB/T3906 | AC metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV |
| GB/T11022 | Common specifications for high-voltage switchgear and controlgear standards |
| DL/T404 | AC metal-enclosed switchgear and controlgear for rated voltages above 3.6 kV and up to and including 40.5 kV |
| GB/T1984 | High voltage AC circuit breaker |
| GB/T1985 | High-voltage alternating-current isolators and earthing switches. |
| GB/T20840 | Instrument transformers - Part 1: General requirements. |
| GB/T11032 | AC Metal oxide surge arresters without gaps |
Type and designation
Service conditions
a. Ambient temperature: - 45℃ - +50℃, the daily average value shall not exceed 35℃
b. Relative humidity: Daily average is not more than 95%, Monthly average is not more than 90%;
c. Altitude: ≤4000m (if the equipment runs above 1000m, please specify it so that the inflation pressure can be adjusted during manufacture);
d. Seismic grade: the seismic intensity shall not exceed grade 8;
e. Pollution: There shall be no Corrosive, flammable gases or other pollution.
※Note: if the service environment exceeds the above conditions, please consult with our company.
Technical parameter
| Item | Unit | Parameters | ||||
| Load switch | Composite apparatus | CB | ||||
| Rated voltage | kV | 12/24 | ||||
| Rated frequency | Hz | 50/60 | ||||
| Rated current | A | 630, 1250 | 125 (Depends on fuse current) | 630,1250 | ||
| Rated insulation level | 1 min power frequency withstand voltage | Phase to phase, phase to earth | kV | 42/65 | ||
| Insulation distance | 48/79 | |||||
| Control and auxiliary circuits | 2 | |||||
| Lightning impulse withstand voltage | Phase to phase, phase to earth | 75/125 | ||||
| Insulation distance | 85/145 | |||||
| Rated short time withstand current | kA/s | 20/4,25/4 | / | 20/4,25/4 | ||
| Rated peak withstand current | kA | 50,63 | / | 50,63 | ||
| Rated short-circuit making current (peak) | kA | 50,63 | Limited by HV fuse | 50,63 | ||
| Rated short-circuit breaking current (r.m.s) | kA | / | Limited by HV fuse | 20/25 | ||
| Rated transfer current | A | / | 1700/1400 | / | ||
| Rated active load breaking current | A | 630 | / | / | ||
| Rated closed loop breaking current | A | 630 | / | 630,1250 | ||
| Mechanical life | Load switch/ circuit breaker | Times | 5000 | 10000 | ||
| Isolating / earthing switch | 5000 | |||||
| Loop resistance | μΩ | ≤150 | / | ≤150 | ||
| Rated inflation pressure (gauge pressure at 20°C) | Mpa | 0.04 | ||||
| Annual SF6 gas loss rate | % | ≤ 0.05 | ||||
| Degree of protection | Cabinet | IP4X | ||||
| Gas chamber | IP67 | |||||
Product features and structure
Product features
● Reasonable design
● Modular design to realize flexible combination and expansion: Functional modularity includes load switch unit (C), load switch + fuse combination unit (F), circuit breaker unit (V), metering cabinet unit (M), bus Pt unit (PT), etc. The switchgear can be combined into a common box type non expandable fixed ring network switchgear through various standard unit modules (in the same SF6 insulated gas box, a total of 6 units can be achieved). Different module combinations can also be designed into expandable units. It can achieve many forms of combination through general full insulation and full shielding bus connection, which can meet the demand for different places, different forms, different needs of customers, and provide a variety of designs for power supply and distribution.
● Others
The user interface and cable wiring are located in the front of the cabinet, which is convenient for users to operate. The instructions of the operation panel are clear, simple, easy to understand, and the interlocking is reliable, so as to effectively prevent and avoid misoperation.
● High safety and reliability
● The primary live part and the switch body are sealed in the stainless steel air box, which is connected to the outside through the bushing to avoid direct contact with the live body. The equipment has a reliable pressure relief device and pressure relief channel, which ensures the safety of personnel and equipment in case of failure; It has perfect mechanical interlocking device, which can prevent misoperation.
● Fully insulated and sealed design
The primary live part (main bus) of the panel and switch itself are sealed in the gas tank of welded stainless steel plate. The main circuit is connected to external through DIN47636 standard bushing that installed on the gas tank. It can also be connected to input and output cable by full insulation, shielding all full sealed separable connector. And protection grade of the gas tank box reach IP67. The inside of the gas tank is not affected by the external environment. It also has the short-term resistance function of flood and condensation.
● Small volume
Small volume, saving floor space.
● Less maintenance
The high-voltage insulation is not affected by the external environment, and is not easy to age. It adopts a maintenance-free vacuum (arc interrupter) switch, which is almost maintenance-free, has a long life cycle and low operating costs.
● Strong environmental adaptability
The high-pressure components are sealed in a gas-filled metal shell, which is especially suitable for harsh environments such as high altitude, severe cold, humidity, salt spray, and pollution.
Product structure
● Outline structure
1. Barometer
2. Operating hole of load switch
3. Operating hole of earthing switch
4. Air box compartment
5. View window
6. Pressure relief chamber
7. Cable room (front door)
8. Disconnector
9. Energy storage operation hole of circuit breaker
10. Fuse (built-in)
11. Live display
12. Secondary instrument room
● Outline structure
Number of units |
1 |
2 |
3 |
4 |
5 |
6 |
W(mm) |
375 |
700 |
1025 |
1350 |
1675 |
2000 |
Note: W (see the table above) ×750×1600mm, with a maximum of 6 co-boxes, and the interval width of each additional unit is 325mm (see the co-box plan table for details). The height of 1600 does not include the secondary instrument room, and the height of the secondary instrument room can be adjusted as required.
Frequently Asked Questions (FAQ)
What are the primary applications of this switchgear?
This switchgear is widely used in small secondary distribution stations, box-type switchgear stations, industrial and mining enterprises, airports, railways, commercial districts, high-rise buildings, highways, subways, tunnels, and other locations with harsh natural environments.
Which international and national standards does this product comply with?
The product fully complies with standards such as IEC62271-200, EN50181, GB/T3906, GB/T11022, DL/T404, GB/T1984, GB/T1985, GB/T20840, and GB/T11032.
What are the limit service conditions for temperature and altitude?
The ambient temperature range is -45℃ to +50℃ (daily average ≤ 35℃). The standard altitude limit is ≤4000m. If operating above 1000m, please specify during manufacture to adjust the inflation pressure.
What is the protection rating (IP code) for the cabinet and gas chamber?
The cabinet itself features a protection rating of IP4X, while the fully sealed stainless steel gas chamber achieves an IP67 rating, protecting it against temporary immersion and condensation.
Why does this switchgear require minimal maintenance?
The high-voltage components are sealed in a gas-filled metal enclosure, shielding them from external pollutants and aging. Additionally, it utilizes a maintenance-free vacuum switch (arc interrupter) which minimizes overall operating costs.
What is the annual SF6 gas leakage rate of this equipment?
The annual SF6 gas loss rate is extremely low, designed to remain at or below 0.05% per year, ensuring long-term operational safety and environmental friendliness.