This circuit breaker is used for control and protection of up to 40.5kV power
systems.
It uses vacuum insulation, as a self-energy arc suppression principle and a reliable
spring operating mechanism, which provides the breaker with high breaking capacity,
low
operating power and high reliability.
The circuit breaker is available in
three-phase
designs, following IEC 62271-100 Standard.
Designed as per IEC 62271-100
1. Vacuum interruption
2. Sealed for life poles
3. Porcelain clad construction of lower Pole part is suitable for outdoor substation
ensures protection from hazardous conditions
4. Long electrical life with proven vacuum interrupters that utilize the excellent arc
quenching and insulating properties of type tested vacuum technology
5. Suitable for auto-closure duty cycle
6. Simple and reliable spring mechanism minimizes operating energy and ensures longer
mechanical life
7. Simple installation structure mounted with option of further extension
8. The complete breaker can be shipped as one unit with minimal adjustments to be made
on
site. As an option the breaker can be shipped in knocked- down kits which can be easily
assembled at site
9. Simple design - minimizes spare parts
10. A robust steel angle structure is used for mounting the breaker which can be
extended
for mounting current transformers depending on customer requirements.
| Technical Data | |||||
| S/N | Item | Unit | Parameter | ||
| 1 | Rated voltage | kV | 40.5 | ||
| 2 | Rated current | A | 630, 1250, 1600,2000 | ||
| 3 | Rated short-circuit breaking current | kA | 20 | 25 | 31.5 |
| 4 | Rated short-circuit making current <peak) | 50 | 63 | 63 | |
| 5 | Rated short-time withstand current | 20 | 25 | 31.5 | |
| 6 | Rated peak withstand current | 50 | 63 | 80 | |
| 7 | Rated short circuit duration | s | 4 | ||
| 8 | Rated.Insulation Level for 1 min P.F. withstand voltage | kV | 95 | ||
| Rated.Insulation Level for lightning impulse withstand voltage | 185 | ||||
| 9 | Rated operating sequence | 0-0.3s-C0-180s-CO | |||
| 10 | Breaking times of rated short-circuit breaking current | time | 30 | ||
| Mechanical Data | |||
| No. | Item | Unit | Data |
| 1 | Open Distance of Contact | Mm | 20±2 |
| 2 | Contacting travel of Contact | 3±1 | |
| 3 | Avg. closing speed | m/s | 0.8±0.3 |
| 4 | Avg. opening speed | 1.8±0.3 | |
| 5 | Closing time | ms | 40~100 |
| 6 | Opening time | 20~60 | |
| 7 | Closing/ Opening time | ≤65 | |
| 8 | Three phase opening asynchronism | ≤2 | |
| 9 | Three phase closing asynchronism | ≤2 | |
| 10 | Bounce time of contact closing | ≤5 | |
| 11 | Circuit resistance of each phase | μΩ | ≤60 |
| 12 | Contact self-closing pressure | N | 180±50 |
| 13 | Centre distance between phase | mm± | 700±5 |
