Description:
SCHXGN15-12 type Air Insulated Ring Main Unit switchgear (Air Cabinet for short) is a metal-enclosed switchgear which uses FZN25-12 air-insulated vacuum load switch as the main switch. The whole cabinet is air-insulated, compact and expandable. The air cabinet can be combined freely according to different purposes to meet the requirements of end users or network nodes. At the same time, It can meet the needs of various power distribution openers, box substations, cable branch boxes. It’s Widely used in industrial and civil power ring networks and power supply terminals.
Features:
u High insulation and good environmental protection.
u Constant pressure, particularly suitable for high altitude areas. Stronger environmental adaptability than SF6 Gas Ring Main Cabinet without special design.
u Smaller size than traditional Ring Main Cabinet of the same voltage level. Compact and convenient for on-site assembly.
u Complete mechanical interlock function, fully meeting interlocking protection requirements.
u Compact size, easy to install and easy to operate with expandable modular combination. Choosing the best wiring scheme according to customer needs.
u Side or side expansion depending on the installation location.
u Configuring electric, remote control and monitoring devices with simulating the different needs of users.
u Complete and reliable Five-protection system.
Using environment:
u Temperature: Min -25℃~Max+40℃;
u Relative humidity: Daily average ≦95%; Monthly average≦90%;
u Altitude: ≦3000m;
u Shock level: Horizontal acceleration 0.4m/s2,Vertical acceleration 0.15m/s2;
u Installation location: The place with no severe impact, serious pollution and chemical corrosion, no conductive dust and explosion risk.
When the conditions of use exceed the above range, the user shall negotiate with us to determine the allowable range or take corresponding supplementary technical measures.
Technical Parameters:
Item | unit | Load switch | Composite apparatus | Circuit breaker |
Rated voltage | KV | 12 | 12 | 12 |
Rated frequency | Hz | 50/60 | 50/60 | 50/60 |
Rated current | A |
|
|
|
Main bus | A | 630 | 630 | 630 |
Branch bus | A | 630 | 125(Depending on the rated current of the fuser) | 630 |
Rated insulation level | KV |
|
|
|
Power frequency withstand voltage (Phase to phase, Phase to ground) | KV | 40 | 42 | 42 |
Power frequency withstand voltage(Fracture) | KV | 48 | 48 | 48 |
Power frequency(Control and auxiliary circuit) | KV | 2 | 2 | 2 |
Lightning impulse withstand voltage(Phase to phase, Phase to ground) | KV | 75 | 75 | 75 |
Lightning impulse withstand voltage(Fracture)) | KV | 85 | 85 | 85 |
Rated short-time withstand current(r.m.s) | KA |
|
|
|
Main circuit | KA | 20/3s | - | 25/2s |
Ground loop | KA | 20/25 | - | 25/2s |
Stable peak withstand current | KA | 50 | - | 63 |
Rated short-circuit closing current(peak) | KA | 50 | 80 | 63 |
Rated short-circuit breaking current | KA | - | 31.5 | 25 |
Rated take-over current | A | - | 1700 | - |
Rated active load breaking current | A | 630 | - | - |
Rated closed-loop breaking current | A | 630 | - | 630 |
Rated cable-charging breaking current | A | 10 | - | 15 |
IP grade |
| IP3X | IP3X | IP3X |
Mechanical life | Time |
|
|
|
Load switch |
| 5000 | 5000 | 10000 |
Grounding switch |
| 3000 | 3000 | 3000 |