In the field of 12kV distribution network, ZW20-12 outdoor vacuum circuit breaker redefines the standard of high-voltage protection equipment with three major innovations: fully sealed maintenance free, intelligent ecology, and extreme environment adaptation.
1、 Core advantage: Why replace traditional Circuit breakers?
Dimension | ZW20-12 | Traditional SF6 circuit breaker | Oil immersed Circuit Breaker |
Environmental protection | Vacuum arc extinguishing, zero greenhouse gas emissions | SF6 leakage (GWP=23500) | Mineral oil contaminated soil |
Maintenance cost | 30 years maintenance free (tested>10000 operations) | annual inspection+gas replenishment | oil change every 5 years |
Extreme environment | stable operation at -40 ℃~+60 ℃ (measured in high cold/coastal areas) | liquefaction risk below -25 ℃ | sudden increase in viscosity at low temperatures |
Installation efficiency | lifting+wiring ≤ 1 hour (modular design) | vacuuming+inflation>4 hours | complex oil treatment |
2、 Technological Disruption: Three Major Innovation Breakthroughs
1. Permanent magnet spring hybrid drive mechanism
-0.05 second opening: The permanent magnet provides initial explosive force, and the spring mechanism completes subsequent actions, which is three times faster than pure springs
-Anti rejection design: Capacitive energy storage ensures no external power when switching (successfully tested in heavy rain power outage scenarios)
2. Zero arc vacuum extinguishing chamber
-Longitudinal magnetic field control: arc diffusion speed increased by 5 times, breaking 40kA current without reignition
-Ceramic metalized packaging: leakage rate<10 ?12 Pa · m 3/s, with a lifespan equivalent to that of the equipment body
3. Smart Cloud Edge Collaboration System
-Fault pre diagnosis: Vibration sensor recognition mechanism jamming (7-day advance warning)
-Thunder chase mode: The reclosing action strategy dynamically adjusts with the intensity of the thunderstorm (connected to the meteorological API)
3、 Scenario based application cases
1. Hainan typhoon season (Typhoon Wipha 2023)
-37 ZW20-12 units of Lingshui Photovoltaic Power Station successfully cut off 23 faults and zero misoperation in level 12 wind and salt spray
-Comparison: SF6 circuit breakers in the same field have insulation degradation due to moisture intrusion, and cannot be overlapped after tripping
2. Power supply for Qinghai Tibet Railway (Nagqu section)
-Operating continuously for 3 years without auxiliary heating at an altitude of 4800 meters/-38 ℃
-Traditional oil circuit breakers require daily hot start under the same operating conditions
Oil&Gas exploited
Automotive Manufacturing
Transportation & Dlistrlbutlon
Manufacture
Industrial Construction
Green Energy
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