ZW7A-30KV(40.5KV) Outdoor High Voltage Vacuum Circuit Breaker
This product is suitable for a 30KV(40.5KV), 50HZ three-phase distribution system and can effectively handle load switching currents, overload currents, and short-circuit currents. Additionally, it can serve as the main incoming switch for medium-voltage SVG-enabled power stations, suitable for locations below 2000 meters in altitude, with a spacing of 710mm, and supports custom dimensions to meet installation requirements above 4500 meters.
Product Mainly composed of an integrated pole, current transformer, operating mechanism, and enclosure.
Product uses vacuum as both the insulating medium and arc-extinguishing medium, making it an ideal product to replace DW oil circuit breakers.
The dimensions are reduced by 260mm compared, making it suitable for installation in spaces with limited positions.
| Tech. parameters | Unit | data | ||
| Rated voltage | KV | 40.5 | ||
| Rated insulation level | 1min power frequency withstand voltage | Dry test | KV | 95 |
| (Effective values) | Wet test | KV | 80 | |
| Lightning impulse withstand voltage (peak) | KV | 185 | ||
| Rated current | A | 1250/1600/2000 | ||
| Rated short-circuit breaking current | KA | 20/25/31.5/40 | ||
| Rated sequence of operations | break-0.3s-make and break-180s-make and break | |||
| Rated capacitor bank breaking current | A | 400 | ||
| Rated breaking times of short-circuit breaking current | times | 30 | ||
| Rated short-circuit closing current (peak) | kA | 50/63/80/100 | ||
| Rated peak withstand current | kA | 50/63/80 | ||
| Rated short-time withstand current | kA | 20/25/31.5/40 | ||
| Rated short-circuit duration | S | 4 | ||
| Total breaking time | s | ≤0.08 | ||
| Mechanical life | times | 20000 | ||
| Rated operating voltage and rated voltage of auxiliary circuit | V | AC, DC 220, 110 | ||
| Clearance between open contacts | mm | 22±2 | ||
| Contact contact stroke | mm | 4±1 | ||
| Average breaking speed | m/s | 1.7±0.2 | ||
| Average making speed | m/s | 0.7±0.2 | ||
| Contacts closing bounce duration | ms | ≤3 | ||
| The three phases non-synchronism | ms | ≤2 | ||
| Closing time | ms | ≤150 | ||
| Opening time | ms | ≤60 | ||
| The DC resistance of each phase circuit | mΩ | ≤100 | ||
Environmental conditions:
1.Ambient air temperature: +60℃ to -30℃
2.Altitude not exceeding 2000m
3.Wind pressure not exceeding 700Pa (equivalent to wind speed of 34m/s)
4.No frequent severe movements
5.Air pollution level: Grade III
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Tel：+86 15538537280
Email：lycnelectric@163.com
Add：No. 9 Duyu Street, Luolong District, Luoyang City, Henan Province
