Explore our full range of high- and low-voltage electrical equipment, including switchgear,
transformers,and prefabricated substations designed for reliability and safety.
Functional composite and integrated products
The inflatable housing of the switchgear is made of high-quality 2.5mm thick stainless steel plate welded by laser, ensuring the sealing reliability of the air box and high mechanical strength Good corrosion resistance, the protection level of the inflata
The main circuit adopts a combination of three position switches (connected+isolated+grounded) and vacuum arc extinguishing chambers, which is currently the most mature configuration method in technology and is particularly suitable for the current operat
Environmentally friendly and pollution-free
The insulation medium of QH-Air-12 series gas filling cabinet is zero grade dry air (purchased externally) or 99.99% pure N2 that complies with GB/T8979-2008. Gas leakage will not have any impact on the external environment and does not require any recycl
A complete mechanical chain
The operation panel of QH-Air-12 series gas filling cabinet has a complete five proof mechanical interlocking function, and all interlocking functions are configured internally. Please follow the operating instructions in the order of operation, which is
Flexible and scalable design
The QH-Air-12 series inflatable cabinet is designed with modularity, allowing various modules to be connected through dedicated busbar connectors to achieve diverse unit combinations, maximizing the satisfaction of complex and diverse distribution design
Product Description：
All live parts and switchgear of QH-Air-12/T630-25 atmospheric pressure air insulated environmental protection cabinet are sealed in a stainless steel shell filled with dry air or N2. There are upper isolation switch schemes that meet the requirements of State Grid and lower isolation switches that meet the requirements of South Grid. This switch device is not affected by external environmental conditions and can fully ensure the reliability and safety of operation, thereby ensuring maintenance free operation.
Environmentally friendly switchgear does not use media that have a significant impact on the environment. It has minimal environmental impact throughout the product’s lifecycle and is environmentally adaptable. This product adopts a common box structure with a complete primary solution, which can fully meet various wiring requirements.
Application field：
Suitable for distribution systems with three-phase AC 50Hz and rated voltage of 12kV, it plays a role in the distribution, control, and protection of electrical energy in the power system. As a ring network and terminal power supply equipment, it is widely used in the tapping, segmentation, and multi-source connection of cable networks, suitable for the control and connection of incoming and outgoing lines in urban underground cable ring networks, and the control and connection of incoming and outgoing lines in overhead line hybrid networks. It can also be used for compact box type substations, cable branch boxes, switch stations, wind power plants, small factories, subways and tunnels, residential power distribution, commercial (shopping) centers, hotels, factory power supply, ports, airports, etc.
Technical Parameter：
| project | unit | C-Unit | V-Unit | ||
| load switch | combined electrical apparatus | vacuum circuit breaker | Isolation/Grounding | ||
| rated voltage | kV | 12 | 12 | 12 | 12 |
| power frequency withstand voltage | kV | 42/48 | 42/48 | 42/48 | 42/48 |
| lightning impulse withstand voltage | kV | 75/85 | 75/85 | 75/85 | 75/85 |
| rated current | A | 630 | 630 | 630 | 630 |
| rated short-circuit breaking current | kA | 25 | |||
| rated number of short circuits | 次 | 30 | |||
| closing ability | kA | 63 | |||
| rade (electrical lifespan) | E3 | E2 | |||
| short time withstand current | kA | 20/4s | 20/4s | 25/4s | 25/4s |
| number of mechanical operations | 次 | 10000 | |||
| mechanical operation sequence | O-0.3s-CO-180s-CO | ||||
| protection level switchgear | IP4X | ||||
| protection level gas box | IP67 | ||||
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