Project | Unit | Breaker | Load switch | Load switch-fuse combination | |
Rated voltage | kV | 12 | 12 | 12 | |
Rated current | A | 630/1250 | 630 | 125 | |
Rated current | Hz | 50 | 50 | 50 | |
1mim power frequency withstand voltage (phase to phase) |
| 42 | 42 | 42 | |
Rated insulation level | 1mim power frequency withstand voltage (isolation break) Power frequency withstand voltage (control and auxiliary circuit) Lightning impulse withstand voltage (phase-to-phase and phase-to-ground) Lightning impulse withstand voltage (isolation break) Rated short-circuit breaking current |
| 48 | 48 | 48 |
kV | 2 | 2 | 2 | ||
| 75 | 75 | 75 | ||
| 85 | 85 | 85 | ||
KA | 20/25 |
| 31.5 | ||
Rated short-circuit making current | KA | 50/63 | 50 | 80 | |
Rated short-time withstand current | KA | 20/25 | 20/25 |
| |
Rated short circuit duration | S | 4/3 | 4/3 |
| |
Rated peak withstand current | KA | 50/63 | 50 |
| |
AC current/transfer current | A |
|
| 3150 | |
Rated operating sequence |
|
| 0-0.3s-CO-180s-CO | ||
Rated gas pressure (gauge pressure at 20℃) | Mpa |
| Normal pressure seal | ||
Pressure release device release pressure (gauge pressure at 20℃) Annual leakage rate Mechanical life | Mpa |
| 0.16 | ||
|
| ≤0.01% | |||
| 10000 | 10000 | 10000 | ||
Annual leakage rate | μΩ | ≤150 | ≤150 | ≤300 | |
The above parameters meet the technical specifications of the Class II grounding system of 12kV ring network switchgear of State Grid Corporation of China, China Southern Power Grid Corporation and Jiangsu Electric Power Company, and are fully compatible with different neutral point grounding methods. | |||||
With WTN series 12kV cable accessories, three-way cable connection combination or two-way cable plus one lightning arrester connection combination can be realized. |