Both load switch cabinet K and primary major loop are sealed in the SF6 air box, and the load switch has “connected”, “isolated”, “grounded” three working positions. At the same time, during the load current breaking process, a special airway is available for “blow” arc extinction on the arc to ensure the safe and reliable breaking performance.
| Model | YCC-K-12/T630-20 | YCC-K-24/T630-20 |
| Type report number | 16Q0192-S | 16Q0191-S |
| Rated voltage | 12kV | 24kV |
| Rated current | 630A | 630A |
| Rated frequency | 50Hz | 50Hz |
| 1min rated short-time power frequency withstand voltage (phase / fracture) | 42/48kV | 65/79kV |
| Rated lightning impulse withstand voltage (phase / fracture) | 75/85kV | 125/145kV |
| Rated active load breaking current | 630A | 630A |
| Closed - loop breaking current of rated distribution line | 630A | 630A |
| Rated cable charging breaking current | 25A | 25A |
| Rated circuit charge breaking current | 1A | 1.5A |
| Rated short circuit closing current | 50kA | 50kA |
| Rated earthing switch short circuit closing current | 50kA | 50kA |
| Rated earth fault breaking current | 31.5A | 31.5A |
| Rated Charging Breaking Current under Rated Earth Fault | 43.3A | 43.3A |
| Rated current under fault conditions | 1.73A | 2.60A |
| Rated short-circuit withstand current (main circuit / ground circuit) | 20kA | 20kA |
| Rated short time withstand current duration | 4s | 4s |
| Rated peak withstand current (main circuit / ground loop) | 50kA | 50kA |
| Partial discharge test | 20pC | 20pC |
| Arc test | 20kA/0.5s | 20kA/0.5s |
| Annual leak rate | ≤0.1% | ≤0.1% |
| Mechanical life | ≥5000 times | ≥5000 times |
| Weight | 1400:130kg/1600:140kg | 1400:130kg/1600:140kg |
