0102030405
China XGN (XGTD6)-12(2Indoor Gas Insulated Metal-Enclosed Switchgear Suppliers & Factory
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.
| 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
- Ambient temperature: -45℃ to +50℃ (the daily average value shall not exceed 35℃)
- Relative humidity: Daily average is not more than 95%, Monthly average is not more than 90%
- Altitude: ≤4000m (if the equipment runs above 1000m, please specify it so that the inflation pressure can be adjusted during manufacture)
- Seismic grade: The seismic intensity shall not exceed grade 8
- 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, and different needs of customers, providing 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 a 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 the external through DIN47636 standard bushing that is installed on the gas tank. It can also be connected to the input and output cable by full insulation, shielding all fully sealed separable connectors. And the protection grade of the gas tank box reaches 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
1Barometer
2Operating hole of load switch
3Operating hole of earthing switch
4Air box compartment
5View window
6Pressure relief chamber
7Cable room (front door)
8Disconnector
9Energy storage operation hole of circuit breaker
10Fuse (built-in)
11Live display
12Secondary instrument room
Outline structure dimensions
| 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)
Q1: What standards does the switchgear comply with?
A1: The switchgear is designed and manufactured in full compliance with major international and national standards, including IEC62271-200, EN50181, GB/T3906, GB/T11022, DL/T404, GB/T1984, GB/T1985, GB/T20840, and GB/T11032.
Q2: Can this switchgear be used in harsh environmental conditions?
A2: Yes. High-voltage components are sealed inside a gas-filled stainless steel enclosure with an IP67 protection rating, protecting them from ambient factors such as dust, humidity, salt spray, and pollution. It operates reliably in temperatures ranging from -45℃ to +50℃ and is suitable for high altitudes up to 4000m.
Q3: How does the modular design benefit secondary distribution stations?
A3: The modular design allows for a flexible layout tailored to different design schemes. It supports both common-box configurations (up to 6 units inside a single SF6 gas tank) and expandable configurations using fully insulated and shielded bus connectors, making it highly compact and versatile.
Q4: What safety features are integrated into the switchgear?
A4: The switchgear is designed with a fully insulated and sealed structure, preventing direct contact with live parts. It features reliable mechanical interlocking devices to prevent misoperation, as well as dedicated pressure relief channels and devices to protect operators and equipment in the event of an internal fault.
Q5: What are the maintenance requirements for the switchgear?
A5: This switchgear is virtually maintenance-free. High-voltage insulation is sealed off from external environmental degradation, and it utilizes a high-durability vacuum switch (arc interrupter) that has a long operational life cycle and significantly reduces long-term operating costs.
Q6: What are the typical physical dimensions for different unit configurations?
A6: The standard depth and height are 750mm and 1600mm respectively (excluding the secondary instrument room). The width (W) varies by the number of units: 375mm for 1 unit, 700mm for 2 units, 1025mm for 3 units, 1350mm for 4 units, 1675mm for 5 units, and 2000mm for 6 units, with an additional 325mm for each extra unit.