Vacuum Circuit Breaker
Introduction - Vacuum Circuit BreakerMZZ61-12 Series Vacuum Circuit Breaker is applied to the power system of 50Hz three-phase AC and 12kV rated voltage. This product meets the GB1984-89 standards. Its overall structures are the switch integrate or separate with the operation mechanism. The integrated structure is the basic structure of MZZ61-12 and the separated structure MZZ61A-12 can be used in various fixed switch cabinet such as: GG-1A(Z), XGZ2A10(Z), etc. It can configure CD17, CD10A DC Electromagnetic actuator and CT17, CT19 spring energy-storage actuator.
Environmental Conditions - Vacuum Circuit Breaker
1. Environmental temperature: maximum temperature +40°C, minimum temperature -15°C
2. Altitude: Lower than 1000m
3. Environmental humidity:
- Daily average relative humidity: ≤95%
- Monthly relative humidity: ≤90%
- Daily saturated evaporation pressure: ≤2.2×10-3MPa
- Monthly saturated evaporation pressure: ≤1.8×10-3MPa
4. Earthquake intensity lower than 8 degree.
5. No dew, flammable, explosive, serious contamination, chemical corrosion or dramatic shock.
Model Meaning of Vacuum Circuit Breaker
Main technical parameters - Vacuum Circuit Breaker
| Name | Unit | Data | ||||
| 20KA | 25KA | 31.5KA | 40KA | |||
| Rated voltage | KV | 12 | ||||
| Rated frequency | HZ | 5 | ||||
| Rated current | A | 630, 1000, 1250 | 1250, 1600 | 1250, 1600 2000, 2500 |
1600, 2000 2500, 3150 |
|
| Rated short circuit breaking current (peak value) | KA | 20 | 25 | 31.5 | 40 | |
| Rated short circuit closed current (peak value) | KA | 50 | 63 | 80 | 100 | |
| Rated peak value dynamic stable current | KA | 50 | 63 | 80 | 100 | |
| 4S thermal stable current tolerance | KA | 20 | 25 | 31.5 | 40 | |
| Rated insulation level | 1min working frequency voltage tolerance | KV | 42 | |||
| Lightening impact voltage tolerance (peak value) | 75 | |||||
| Rated operation order | 0-T-CO.T″-CO | |||||
| Mechanical life span | Times | 10000 | ||||
| Rated times of short circuit breaking current | Times | 30 | 20 | |||
| Rated actuator closing switch current (DC) | V | 110, 200 | 220 | |||
| Rated actuator opening switch current (DC) | V | 110, 200 | ||||
| Name | unit | Data | ||
| Contact open size | Mm | 11±1 | ||
| Excess travel(compression length of contact spring) | Mm | 4±1 | ||
| Different periods of three-phase open/close the switch | Ms | ≦2 | ||
| Contact bouncing time of closing switch | Ms | ≦2 | ||
| Average Switch opening speed (from 6MM ) | M/s | 1.1±0.2 | ||
| Average Switch closing speed | M/s | 0.6±0.2 | ||
| Switch opening time | maximum operation voltage | S | ≦0.06 | |
| Minimum operation voltage | ≦0.08 | |||
| Switch closing time | S | ≦0.2 | ||
| Resistance of each phase main circuit | μΩ | ≦40 | ≦30 | |
| Allowed accumulated attrition thickness of dynamic and static contact | Mm | 3 | ||
| Data model code | 20KA 25KA 31.5KA | 40KA |
| A | 230 | 275±1 |
| B | 600 | 690 |
| C | 707 | 842 |
| D | 560 | 652 |
| E | 293 | 342 |
| F | 227±1 | 227±1 |
| Rated current | 20KA 25KA 31.5KA | 40KA | ||
| Code | A | B | A | B |
| Data | 250 | 610 | 275 | 690 |
MZZ61-12 Series Vacuum Circuit BreakerBack
Complete set switchgear-Power Control System
