R-AIR Atmospheric Sealed Air Insulated Switchgear
The commissioning of atmospheric sealed air insulated switchgear is Huntsman's self-challenge to its own business and technology level, and is Hertzman's phased achievement in striving to achieve the concept goal of "non SF6" for medium voltage power distribution equipments.
R-AIR atmospheric sealed air insulated switchgear is a fully insulated &fully enclosed switchgear that uses clean dry air as the insulating medium, uses vacuum arc extinguishing as the arc extinguishing method, and has been type tested.
R-AIR atmospheric sealed air insulated switchgear not only meets the basic needs of power users for the safety, reliability and continuity of power equipment, but also provides users with new value in compact, intelligent and environmental protection; It is suitable for public distribution network primary and secondary distribution stations, intelligent buildings, industries, infrastructure and other occasions.
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R-AIR
Atmospheric Sealed Air Insulated Switchgear
Characteristic
Environmentally friendly design
The treated dry clean air is used as the insulating medium, and the electrical clearance in the cabinet is 125mm to ensure the electrical performance and compliance.
Fully insulated and fully enclosed design
The main primary electrified devices and components are enclosed in the stainless-steel welded gas cabinet, completely eliminating the contact of personnel and preventing the impact of dust, moisture, foreign matters, small animals, etc. It has the design of atmospheric fully enclosed and fully sealed gas cabinet, which can be used in high altitude areas. The design of the air cabinet with pressure relief valve and the high-strength armored outer sheet metal cabinet with pressure relief channel ensures the safety of operators.
High altitude adaptive design
There are two kinds of air cabinet pressure design, namely, atmospheric and 150KPa. According to the needs, the design mode with pressure can be selected in high altitude areas.
Large current redundancy design
Combined application of 1250A/25KA and 630A/25KA should be more leisurely for high-capacity systems.
High reliability design
The driving form of the steel spindle of the circuit breaker ensures the stability of the mechanical characteristics of the circuit breaker in the whole life cycle. The operating mechanism with a mechanical life of 20000 times ensures the high reliability of the overall switchgear.
Compact design
The width of standard circuit breaker cabinet is 460mm, which can easily meet the requirements of switching posts or other compact applications.
Multiple expansion mode design
Side expansion and top expansion, shared air cabinet and independent air cabinet and other various expansion and combination modes can better adapt to various electric field combinations.
Intelligent design
The intelligent control system and sensors are combined and applied, and the communication function of the device could be used to connect with the DAVID CLOUD system based on Internet of Things technology and cloud computing, or with other systems required by users.
Parameter
Table of Technical Parameters (Common Parameters of Ring Main Unit)
| Name | Unit | Standard parameter | |
| Rated voltage | kV | 12 | |
| Insulating medium | Dry air | ||
Type of arc extinguishing chamber | Vacuum | ||
| Rated frequency | Hz | 50 | |
| Rated current | A | 630/1250 | |
| Temperature rise test current | 1.1Ir | ||
Rated power frequency withstand voltage 1min (phase to ground) | kV | 42 | |
| Peak value of rated lightning impulse withstand voltage (1.2/50s) (phase to ground) | kV | 75 | |
| Rated short-circuit breaking current | kA | 20/25 | |
| Rated short-circuit making current | kA | 50 | |
| Rated short-time withstand current | kA/s | 20/4 | |
Rated peak withstand current | kA | 50 | |
Arc current and arc duration time | kA/s | ≥20/0.5 | |
| Breaking times under rated active load | 次 | 100 | |
Short time power frequency withstand voltage of auxiliary and control circuits | kV | 2 | |
| Control power | Control loop (independent) | V | DC 48/DC110 |
Auxiliary circuit | V | DC 48/DC110 | |
| Energy storage circuit (independent) | DC 48/DC110 | ||
Service life | year | ≥40 | |
| Degree of protection | Cabinet enclosure | IP4X | |
| Air Cabinet | IP67 | ||
| Operator configuration | Electric motor operation, with manual operation function | ||
| Spare auxiliary contact | pair | 6 Dynamic closing 6 Dynamic opening | |
| Automated configuration | Distribution automation interface | ||
