Application
Actastheprotectingandcontrollingunitforgridequipmentsandindustrialminingenterprises’equipments,LW8-40.5 type outdoor SF6 circuit breaker is an outdoor device used in AC 50HZ three-phase 40.5KV power system.It is applicable to locations that need frequent operating in rated current or under repeatedly on/off short circuit current. Containing the current transformer for measurement and protection, it can directly replace SW2-35 less oil circuit breaker and various types of oil circuit breaker with transition bracket. It can also be used as a tie breaker and switching capacitor group situations with CT14 type spring mechanism.
Standards
GB1984
GB/T28001-2011 idt OHSAS18001:2007
GB/T24001-2004 idt ISO14001:2004
Features
Excellent breaking performance, short burning arc time, long life;
Mechanical life of more than 3000 times;
Operation frequently, each can be installed 12 current transformers;
New type SF6 MKZ pointer type density meter, pressure gauge reading is not affected by temperature changes;
Environmental Condition
Ambienttemperature:-30℃~+40℃
Altitude:≤3000m
Wind pressure:≤700Pa
Relative humidity:daily average relative humidity: ≤95%;monthly average relative humidity≤90;daily average saturated vapor pressure ≤2.2KPa;monthly average value ≤1.8KPa
Air pollution level:Ⅲ
Earthquake intensity:≤8 degree
The installation should be free from fire, explosion, severe vibration, chemical corrosion and serious pollution
Main Technical Parameters
| Description | Unit | Data | ||
| Ratedvoltage | KV | 40.5 | ||
| Ratedinsulationlevel | Lightningimpactwithstandvoltage(fullwavepeak) | 185/215(isolatingbreak) | ||
| 1minpowerfrequencywithstandvoltage | 95 | |||
| Ratedcurrent | A | 1600 | 2000 | |
| Meachanicallife | Times | 3000 | ||
| RatedSF6gaspressure(at20℃) | Mpa | 0.45 | ||
| Self-lockingpressure(at20℃) | 0.45 | |||
| Lowestworkingambienttemperature | ℃ | -30 | ||
| Ratedshortcircuitbreakingcurrent | KA | 25 | 31.5 | |
| Ratedshortcircuitmakingcurrent(peak) | 63 | 80 | ||
| Ratedshortwithstandcurrent(Thermalsteadycurrent) | 25 | 31.5 | ||
| Ratedpeakwithstandcurrent(dynamicsteadycurrent) | 63 | 80 | ||
| Ratedout-of-phasebreakingcurrent | KA | 63 | 80 | |
| Durationofratedshortcircuitcurrent | S | 4 | ||
| Closingtime(atratedoperatingvoltage) | ≤1 | |||
| Openingtime(atratedoperatingvoltage) | ≤0.07 | |||
| Ratedoperatingsequence | (O)-0.3S-(CO)-180S-(CO) | |||
| Ratedbreaking/makingsiglecapacitorcurrent | A | 400 | ||
| Nosofbreakingratedshortcircuitbreakingcurrent | times | 15 | 10 | |
| Yearlygasleakege | %/years | ≤1 | ||
| WatercontentinSF6(at20℃) | PPM(V) | ≤150 | ||
| Ratedvoltageofassembiedspringoperatingmechanism | V | -220 | ||
| Voltageofclosingcoil,openingcoil | AC:220 | |||
| DC:220 | ||||
| Voltageofchargingmotor | V | AC:220 | ||
| DC:220 | ||||
| SF6Weight | KG | 8 | ||
| Breakingweightincludingoperatingmechanism | 1400 | |||
Note:Please contact the factory to confirm the latest parameters