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China XGN (XGTD6)-12(2Indoor Gas 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 arbitrary 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 substations. It can be widely applied 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 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.
| Standard Code | Description |
|---|---|
| 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℃ to +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.
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 | 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. Includes load switch unit (C), load switch + fuse combination unit (F), circuit breaker unit (V), metering cabinet unit (M), bus Pt unit (PT), etc. Can be combined into a common box type non-expandable fixed ring network switchgear (up to 6 units in the same SF6 insulated gas box) or designed into expandable units connected by fully insulated and shielded busbars.
User interface and cable wiring are in the front for convenient operation. Clear instructions on the operation panel and reliable interlocking prevent misoperation.
High safety and reliability
Primary live parts and switch body are sealed in the stainless steel air box, connected externally through bushings to avoid direct contact. Features a reliable pressure relief device and channel for personnel safety. Perfect mechanical interlocking prevents misoperation.
Fully insulated and sealed design
Primary live parts (main bus) and switch are sealed in a welded stainless steel gas tank. Connected externally via DIN47636 standard bushings. Gas tank protection grade reaches IP67, making it unaffected by external environments, with short-term resistance to floods and condensation.
Small volume & Less maintenance
Saves floor space. High-voltage insulation is protected from the external environment and does not age easily. It adopts a maintenance-free vacuum (arc interrupter) switch, leading to low operating costs and a long life cycle.
Strong environmental adaptability
High-pressure components are sealed in a gas-filled metal shell, 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 CB
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 applications is this switchgear suitable for?
This switchgear is widely applied 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 environmental conditions.
What international and national standards does the switchgear 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 environmental limits for normal service conditions?
The standard service conditions require an ambient temperature between -45℃ and +50℃ (daily average ≤ 35℃), relative humidity under 95% (daily average) and 90% (monthly average), altitude ≤ 4000m, and seismic intensity not exceeding grade 8. The environment must also be free from corrosive or flammable gases.
How does the switchgear ensure safety and reliability?
Safety is ensured through a fully sealed stainless steel gas tank (IP67 rating) that prevents direct contact with live parts. The switchgear is also equipped with reliable pressure relief devices, pressure relief channels, and a complete mechanical interlocking system to prevent operational errors.
Does this switchgear require frequent maintenance?
No, it requires very little maintenance. The high-voltage components are sealed from external environmental influences, preventing aging. Additionally, it uses a maintenance-free vacuum switch (arc interrupter), resulting in a long life cycle and low operational costs.