DENGGAO ELECTRIC CO., LTD.  

Product Name: High Voltage Pole-Mounted Vacuum Circuit Breaker Function: Conventional Circuit Breaker, Overcurrent Protection Type: Circuit Breaker Installation: Fixed Arc-extinguishing Medium: Vacuum Operation: Manual Type Breaking Capacity: High Voltage Circuit Breakers Trademark: DGG Transport Package: Export Box Origin: China HS Code: 8504311000 Product Description GeneralNew problem of distrbution network as below:1. When the main trunk circuit modified,the branch line failure rate is rising;2. Due to the failure of branch line user and protect mismatch,spread to the whole feeder power outages and lead to liability disputes;3. Transformer substation grounding selected-line equipment can not satisfy quick find grounding point demand;4. Due to protective circuits with multilevel add delay,worsening of power network working.FZW28-12F type excellent solve the problem as above.Boundaries switch (watch-dog) functionsTechnical specificationNo.ItemUnitData1Rated frequencyHz502Rated voltagekV123Rated short-time power frequency withstand voltageInterphase, to earth(wet)kV/min34/1Interphase, to earth(dry)42/1Interrupter fracture, isolated fracture(dry test)49/1Auxiliary control circuit to earth2/14Rated lightning impulse withstand voltageInterphase, to earthkV75Arc extinguish chamber Break, Isolation break855Rated currentA6306Rated short-time withstand current and durationkA/s20/47Rated peak withstand currentkA508Rated short-circuit making current(peak)509Leak rate of year≤0.5%10Main circuit resistanceμΩ≤55011Machanical lifeTimes10000Note: If altitude over than 1000m, the rated insulation level should be modify as appropriate.