
17.5kv-630A Air/Sf6 Gas Insulation Switch-Gear Type Ring Main Unit
Air Insulated SF6 Ring Main Unit General SF6 ring main unit, with SF6 load switch as the main switch, the whole cabinet is suitable for power distribution automation, and is a compact and expandable metal enclosed switch cabinet. It has the characteristics of simple structure, flexible...
Description
To consistently enhance the management method by virtue of the rule of 'sincerely, fantastic religion and top quality are the base of business development', we extensively absorb the essence of associated goods internationally, and constantly acquire new merchandise to satisfy the needs of shoppers for 3-Phase distribution transformer, insulated ring main units, Dry Type Transformer. We require our employees to be ambitious and pursue higher goals, better quality and better benefits in development. We will improve ourselves and strive to provide you with more perfect and reliable products as soon as possible. The products can be designed in a humanized manner according to the diverse demands of customers. We will establish and improve the management innovation work system, continue to promote management innovation, and improve our corporate governance capability.
Air Insulated SF6 Ring Main Unit
General
SF6 ring main unit, with SF6 load switch as the main switch, the whole cabinet is suitable for power distribution automation, and is a compact and expandable metal enclosed switch cabinet. It has the characteristics of simple structure, flexible operation, reliable interlocking and convenient installation, and can provide satisfactory technical solutions for different applications and users. By adopting the latest sensor technology and protection relay, coupled with advanced technology and flexible assembly projects, SF6 ring main unit can fully meet the ever-changing market demand. It can be equipped with self-produced FLBS36 SF6 load disconnect switch; it can also be combined with the world-class VB4 series vacuum circuit breaker (permanent magnet mechanism manufactured by AREVA) or HD4 type SF6 circuit breaker manufactured by AREVA or manufactured by ABB according to user requirements HD4 type SF6 circuit breaker or a vacuum circuit breaker with permanent magnet mechanism assembled with our VS1-12. The operation method of the main switch inside the ring body can be manual or electrically driven. Used in conjunction with FTU and RTU, it can meet the requirements of "four controls".
Feature
1. The metal-clad fully enclosed structure can prevent dust and small animals from entering.
2. Through the observation window on the door panel, you can clearly see the switch position and general status.
3. The door and the switch operating handle are mechanically interlocked to ensure that the door cannot be opened when the switch is closed, and the switch cannot be closed when the door is open.
4. The switch cabinet uses vacuum switches and solid insulation materials. This environmentally friendly technology avoids the use of SF6 as an insulating gas.
5. The reliable five-proof interlock can effectively prevent misoperation.
Service environment
1. Temperature: -35℃~+40℃
2. Humidity: monthly average humidity 95%; daily average humidity 90%.
3. Altitude: ≤2500m
4. The surrounding air is obviously not polluted by corrosive and combustible gases, vapors, etc.
5. No frequent violent shaking
Technical Date
| No. | Item | Unit | Parameter | |||
| 1 | Rated voltage | kV | 12 | 24 | 36 | |
| 2 | Rated frequency | Hz | 50/60 | |||
| 3 | Rated current | A | 630(1250*) | |||
| 4 | 1min Power frequency withstand voltage | wet | kV | 38 | 50 | 70 |
| dry | kV | 48 | 60 | 85 | ||
| 5 | Lightning impulse withstand voltage | kV | 75 | 125/150 | 170 | |
| 6 | Rated short circuit breaking current (peak) | kA | 80 | 63 | 63 | |
| 7 | Rated active load and close circuit breaking current | A | 63 | 50 | 50 | |
| 8 | Rated transferring current | A | 1700 | 1200 | 1200 | |
| 9 | Rated short circuit making current (peak) | kA | 80 | 63 | 63 | |
| 10 | Rated cable(line) charging breaking current | A | 50 and 10 50/10 | |||
| 11 | Cable charge breaking current in earthing fault | A | 20 | 20 | 20 | |
| 12 | Rated withstand current (peak) | kA | 80 | 63 | 63 | |
| 13 | Short time withstand current (2s) | kA | 25 | 20 | 20 | |
| 14 | Mechanism life | times | 5000 | 2000 | 2000 | |
Note: For short circuit break, the peak current is based on fuse plus combination.
Pictures:



We strive to improve the safety of our 17.5kv-630A Air/Sf6 Gas Insulation Switch-Gear Type Ring Main Unit and protect the health and safety of our customers. We're keeping chasing WIN-WIN situation with our consumers. After years of development, the company's product categories continue to increase, the production scale and sales scope continue to expand, thus our company has maintained a good and steady development momentum.
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