Overview
ZN85-40.5 indoor high-voltage vacuum circuit breaker is an indoor high-voltage switchgear with a rated voltage of 35kV and three-phase AC 50Hz. It is suitable for control or protection switches in power plants, substations, industrial and mining enterprises and other transmission and distribution systems, especially for breaking important loads and frequent operations in high-altitude areas.
Operating Conditions
1. Altitude: 1000m and below;
2. Environmental temperature: upper limit+40 ℃, lower limit -25 ℃;
3. Relative humidity: daily average relative humidity not exceeding 95%, monthly average relative humidity not exceeding 90%.
4. Seismic intensity not exceeding 8 degrees;
5. A place free from flammable, explosive, or chemically corrosive substances and intense vibrations.
Model and meaning
Technical Data
| Item | Unit | Parameter | |||||||
| Rated voltage | kV | 40.5 | |||||||
| Rated current | A | 1250 | 1600 | 2000,2500 | |||||
| Rated short-circuit breaking current | kA | 25 | 31.5 | 25 | 31.5 | ||||
| Rated peak withstand current | 63 | 80 | 63 | 80 | |||||
| Rated short-time withstand current | 25 | 31.5 | 25 | 31.5 | |||||
| Rated short-circuit closing current | 63 | 80 | 63 | 80 | |||||
| Rated short-circuit current breaking Times | Times | 20 | |||||||
| Rated operating sequence | / | O-0.3s-CO-180s-CO | |||||||
| Rated insulation level | 1min power frequency withstand voltage | kV | 95 | ||||||
| Rated lightning impulse withstand voltage (peak) | 185 | ||||||||
| Mechanical life | Times | 10000 | |||||||
| Rated single capacitor bank breaking current | A | 630 | |||||||
| Rated back-to-back capacitor bank breaking current | A | 400 | |||||||
| Rated operation voltage | V | AC/DC; 220/110 | |||||||
| Open clearance between contacts | mm | 20±2 | |||||||
| Overtravel | V | 7.5±1.5 | |||||||
| Contact closing bounce time | ms | ≤3 | |||||||
| Three-phase, switching synchronism | ms | ≤2 | |||||||
| The main galvanic circle resistance | μΩ | ≤40 | |||||||
Overall and mounting dimensions(mm)
