Model Number: GYJ-0051-#6871 Brand Name: GAOYAN Key Specifications/Special Features: Supply 2017 new vacuum breaker from china LW24-40.5/72.5T, H.V.A.C. dead tank type SF6 gas Circuit Breakers is a new kind of circuit breaker with self-blast interrupter and spring operating mechanism, on the basis of technology of product imported from Mitsubishi, JapanThe latest achieve- arc extinguishing principle of gas-blast pressure adapting with breaking-current is employed, by which most of energy required for breaking rated for short-circuit current are acquired from arc itselfTherefore, the demand for operating power is reduced significantlyThe three pole interrupters are placed inside three metal enclosures respectivelyThe circuit breaker can be mechanically three-phase gang operatedBoth remote electrical control and local manual control can be realizedType CT20-Ⅱ spring operating mechanism, provided with the product, is a kind of mechanism with low operating power, minimum maintenance work needed and high reliability. The product reaches international advanced level in the respect of main technical performance No.ITEM UNIT LW9-40.5 LW9-72.5/T LW25-126/T LW25-252/T 1 Rated Voltage kV 40.5 72.5 123/145 252 2 Rated Frequency Hz 50 50 50 50 3 Rated Normal Current A 3150/4000 3150/4000 2000,3150,4000 4000 4 Rated Short-circuit Breaking Current kA 50 31.5/40 31.5/40 40,50 5 Rated Short Circuit Making Current kA 125 80/100 80/100 100,125 6 Rated Short-time Withstand Current and Duration kA 50(3s) 31.5（4s）/40（4s） 31.5（4s）/40（4s） 40（4s）/50(4s) 7 Rated Peak Withstand Current kA 125 80/100 80/100 100,125 8 Short-line Fault Breaking Current kA Le*90% Le*75% 9 Rated out-of –phase Breaking current kA Le*25% 10 Creepage distance cm/ kV 3.1 3.1 2.5,3.1 2.5,3.1 11 1 min Power Frequency Withstand Voltage Dry Test Across Open Breaks kV 95+23.4
160+42 230+95 460+145 To Earth kV
95 160 275 460 Wet Test Across Open Breaks kV 95 160+42 230+95 460+145 To Earth kV 185+33 160 275 460 12 Rated Lightning Frequency Withstand Voltage Across Open Breaks kV 185 350+59 650+100 1050+200 To Earth kV 350 650 1050 13 5 min Power Frequency Withstand Voltage Under Zero-gauge Pressure kV 1.3*40.5*√3 1.3*72.5*√3 1.3*145*√3 1.3*252*√3 14 Closing Time ms ≤150 ≤150 ≤150 ≤100