Model：EEP-24/3150-31.5
Category：Embedded poles
Specifications of Embedded Pole
| Main Technical Specification | Unit | Specification |
| 3150 | ||
| Rated voltage | kV | 24 |
| Rated current | A | 3150 |
| Rated frequency | HZ | 50/60 |
| Short time power frequency withstand voltage(1min) | kV | 65(79) |
| Lightning impulse withstand voltage | kV | 125(145) |
| Rated short circuit breaking current | kA | 31.5 |
| Rated peak withstand current | kA | 80 |
| Rated short circuit making current | kA | 80 |
| Rated short time withstand current | kA | 25 |
| Rated duration of short circuit | S | 4 |
| Rated breaking current of single capacitor bank | A | 400 |
| Rated breaking current of back to back capacitor bank | A | 400 |
| Rated operating sequence | O-0.3s-CO180s-CO | |
| Breaking operations of rated short circuit breaking current | Times | 20 |
| Rated mechanical endurance | Times | 10000 |
| Closing force due to bellow and atmosphere | N | 100±50 |
| Force required to hold contacts open at full stroke | N | 200±50 |
| Circuit resistance at lower limit of rated contact force | mΩ | ≤25 |
| Contacts limit erosion | mm | 3 |
| Gas pressure inside vacuum interrupter | Pa | ≤1x10?3 |
| Localize discharge | Pc | ≤5 |
Mechanical Data Required for the Matched Vacuum Switchgear
| Main Technical Specification | Unit | Specification |
| 3150 | ||
| Clearance between open contacts | mm | 13±1 |
| Average opening speed | m/s | 1.3±0.2 |
| Average closing speed | m/s | 0.6±0.2 |
| Rated of contact force | N | 3150±200 |
| Contact bouncing duration at closing operation | ms | ≤2 |
| Out of simultaneity of contact closing and opening | ms | ≤2 |
| Maximum rebound during opening | mm | ≤2 |
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