Standards：GB/T28001-2011 idt OHSAS18001:2007
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 | ||
| Rated voltage | KV | 40.5 | ||
| Rated insulation level | Lightning impact withstand voltage(full wave peak) | 185/215(isolating break) | ||
| 1min power frequency withstand voltage | 95 | |||
| Rated current | A | 1600 | 2000 | |
| Meachanical life | Times | 3000 | ||
| Rated SF6 gas pressure(at 20℃) | Mpa | 0.45 | ||
| Self-locking pressure(at 20℃) | 0.45 | |||
| Lowest working ambient temperature | ℃ | -30 | ||
| Rated short circuit breaking current | KA | 25 | 31.5 | |
| Rated short circuit making current(peak) | 63 | 80 | ||
| Rated short withstand current(Thermal steady current) | 25 | 31.5 | ||
| Rated peak withstand current(dynamic steady current) | 63 | 80 | ||
| Rated out-of-phase breaking current | KA | 63 | 80 | |
| Duration of rated short circuit current | S | 4 | ||
| Closing time(at rated operating voltage) | ≤1 | |||
| Opening time(at rated operating voltage) | ≤0.07 | |||
| Rated operating sequence | (O)-0.3S-(CO)-180S-(CO) | |||
| Rated breaking/making sigle capacitor current | A | 400 | ||
| Nos of breaking rated short circuit breaking current | times | 15 | 10 | |
| Yearly gas leakege | %/years | ≤1 | ||
| Water content in SF6(at 20℃) | PPM(V) | ≤150 | ||
| Rated voltage of assembied spring operating mechanism | V | -220 | ||
| Voltage of closing coil, opening coil | AC:220 | |||
| DC:220 | ||||
| Voltage of charging motor | V | AC:220 | ||
| DC:220 | ||||
| SF6 Weight | KG | 8 | ||
| Breaking weight including operating mechanism | 1400 | |||
Note: Please contact the factory to confirm the latest parameters
