EnglishHigh voltage disconnect switches are essential for ensuring safe electrical isolation in power systems. Designed for both indoor and outdoor applications, they provide visible open points, enable safe maintenance, and support small current operations. Fenarro’s series covers multiple voltage levels and installation environments, helping engineers and procurement teams select the right switch for substations, industrial facilities, and renewable energy projects.
High Voltage Circuit Breakers
Electric Type
Normal Type Circuit Breaker
Vacuum
Fixed & Withdrawable
MCCB
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| NO. | ITEM | UNIT | VALUE | ||
| 1 | Rated voltage | kV | 24 | ||
| 2 | Rated short-time power frequency withstand voltage (1min) | kV | 65/79 (phase-to-phase, ground/opening) | ||
| 3 | Rated lightning impulse withstand voltage (peak) | kV | 125/145 (phase-to-phase, ground/opening) | ||
| 4 | Rated frequency | Hz | 50 | ||
| 5 | Rated current | A | 630, 1250 | 630, 1250, 1600 2000,2500,3150 | 630, 1250, 1600 2000,2500,3150 |
| 6 | Rated short-circuit breaking current | kA | 20/25 | 31.5 | 40 |
| 7 | Rated short-time withstand voltage | kA | 20/25 | 35.5 | 40 |
| 8 | Rated short-circuit duration | s | 4 | ||
| 9 | Rated peak withstand current | kA | 50/63 | 80 | 100 |
| 10 | Rated short-circuit closing current | kA | 50/63 | 80 | 100 |
| 11 | Secondary circuit power frequency withstand voltage (1min) | V | 200 | ||
| 12 | Rated single/back-to-back capacitor group breaking current | A | 630/400(40kA for 800/400) | ||
| 13 | Rated capacitor group closing surge current | kA | 12.5(frequency not exceeding 1000Hz) | ||
| 14 | Mechanical life | time | 20000 | ||
| 15 | Rated current breaking times (electrical life) | time | 20000 | ||
| 16 | Rated short-circuit current breaking times | 50(40kA≤30) | |||
| 17 | Allowable cumulative thickness of dynamic and static contact wear | mm | 3 | ||
| 18 | Energy storage time | s | ≤10 | ||
| 19 | Contact opening distance | mm | 14±1 | ||
| 20 | Overtravel | mm | 3.5±0.5 | ||
| 21 | Contact closing bounce time | ms | ≤2(40kA≤3) | ||
| 22 | Intermittency of three-phase opening and closing | ms | ≤2 | ||
| 23 | Average opening speed (contact separation - 8mm) | m/s | 1.5±0.2 | ||
| 24 | Average closing speed (8mm - contact closure) | m/s | 0.8±0.2 | ||
| 25 | Dominant circuit resistance | μΩ | ≤50(630A)≤45(1250A) ≤35(1600-2000A)≤25(2500A and above) | ||
| 26 | Rated operating sequence | Opening - 0.3s - Closing - 180s - Closing | |||