PURANA insist on the best material, latest APG technology and highest standard production control, which can make sure that our embedded poles can reach the highest quality:
1. Innovative APG casting can prevent effects shock, moisture and dust on the interrupter;
2. China best vacuum interrupter manufacturer, also it can be designated by clients;
3. All Germany imported epoxy resin, it has good cracking resistance characteristic and glass transition temperature can reach 110℃;
4. Choosing the T2 cooper, shaped by the forging and pressing, then the upper and lower outgoing terminals has good inner compactness and conductivity;
5. All Germany imported glass fiber has excellent shock resistance and tensile strength make sure the best quality of embedded pole.
Definition:
Embedding the vacuum interrupter in a special cast resin makes the pole parts of the circuit-breaker notably robust and at the same time protects the vacuum interrupter from impact, dust, moisture and external damage. PURANA insist on the best material, latest APG technology and highest standard production control, which can make sure that our embedded poles can reach the highest quality. Maintenance-free for life, modular in structure and extremely robust and compact in design – characteristics enabling embedded poles for vacuum circuit breakers to fulfill the highest quality standards and making them highly reliable even in adverse conditions. With their intelligent overall design, the embedded poles can easily be assembled into vacuum circuit-breakers, making them the optimum choice for apparatus manufacturers. As a further plus, embedded poles function is absolutely stable in the widest conceivable range of climatic conditions.
Features:
High dielectric strength without any further external precautions;
Optimum protection of the vacuum interrupter from moisture, dust and external damage;
Suitable for all conceivable climatic conditions and site altitudes;
Absolutely reliable with long service life;
Easy assembly on circuit-breakers;
Highest quality standard;
Maintenance-free;
Efficient increase in dielectric strength without use of greenhouse gases.
Main Technical Datas:
| 1 | Rated voltage | 12KV |
| 2 | Rated Current | 1250A |
| 3 | Rated frequency | 50/60HZ |
| 4 | Rated short-circuit breaking current | 40KA |
| 5 | Breaking operations of rated short-circuit breaking current | 30 times |
| 6 | Rated short-circuit making current | 100KA |
| 7 | Rated peak withstand current | 100KA |
| 8 | Rated short-time withstand current(4s) | 40KA |
| 9 | Rated breaking current of single capacitor bank | 630A |
| 10 | Rated breaking current of back-to-back capactior bank | 400A |
| 11 | Short-time power-frequency withstand voltage (1min) | 42KV/48KV |
| 12 | Lightning impulse withstand voltage (peak) | 75KV/85KV |
| 13 | Circuit resistance at rated contact force | ≤20µΩ |
| 14 | Mechanical endurance | 20000 times |
| 15 | Contact closing force due to bellows and atmosphere | 210±60N |
| 16 | Counterforce at rated contact storke | 350±60N |
| 17 | Contact limit erosion | 3mm |
| 18 | Storage life | 20 years |
| 19 | Partial discharge | ≤1PC |
| 20 | Rated operating sequence | 0-0.3s-CO-180s-CO |
Mechanical Datas of Vacuum Circuit Breaker:
| 1 | Rated contact stroke | 9±1mm |
| 2 | Contact connect storke | 4±1mm |
| 3 | Average opening speed | 1.1±0.2m/s |
| 4 | Average closing speed | 0.6±0.2m/s |
| 5 | Rate contact pressure | 4200±300N |
| 6 | Contact bouncing duration at closing operation | ≤2ms |
| 7 | Out of simultaneity of contact closing and opening | ≤2ms |
| 8 | Max. Overtravel | ≤2mm |
Drawing of Embedded Pole:
Mixed-Embedded All-in Machine:
Automatic Machine of Raw Material:
Production Equipments:
Production Testers:
Testing before Ex-work:
Warehousing:
