1.Features
LW58-252 outdoor three-phase pocelain-pole eletric equipment is new type of circuit breaker.It uses SF6 gas as arc extinction and insulation medium. The arc extinction chamber adopts the world''s leading self-energy double-action acr extinction approach, coupled with new type spring operating mechanism. It is featured by long service life, less operating power, low noise and high reliablity. The general technical performance achieve the global leading level.
2. Ambinent Conditions
Ambinent Temperature: -50oC ¡«+50oC
Altitude: ¡Ü2000m
Wind Speed: ¡Ü34m/s
Daily range of Temperature: ¡Ü25oC
Sunlight: ¡Ü1000W/m2
Average monthly humidity: ¡¡¡Ü90%
Earthquake Level: Level 8
Ice Thickness: ¡Ü10mm
Air Pollution: ¡ÜGB/T 5582 Level IV
Appplication: Outdoor, without fire, explosion, chemincal corrosion and severe quake
3. Main technical data of breaker
No
Name
Unit
Value
1
Rated voltage
kV
252
2
Rated power frequency
withstand voltage (1min)
To earth
460
Between interrupter
460+146
3
Rated thunder impulse
withstand voltage
1050
1050+206
4
Rated frequency
Hz
50
5
Rated current
A
4000
6
Amplitude factor
1.3
7
Rated short-circuit breaking current
kA
8
Rated short-circuit making current(peak)
125
9
Rated current withstand current
10
Rated peak value withstand value
11
Rated short-circuit duration
s
12
Rated out-of-phase breaking current
12.5
13
Breaking current of close-in fault
90%lk£¬75%lk
14
Rated line-charging breaking current
200
15
Operating sequence
O-0.3s-CO-180s-CO
16
Resistance other main circuit
¦Ì¦¸
¡Ü55
17
Rated gauge pressure of SF6(20¡æ)
Mpa
0.6
18
Minimum functional gauge pressure(20¡æ)
0.550.015/0.50.015
19
Annual leakage rate of SF6
¡Ü0.5%
20
Amount of water of SF6(V/V)
ppm
¡Ü150
21
Mechanical life
times
6000
22
Electrical level of radio interference
¦ÌV
£¼500
23
Creepage distance
mm
¡Ý8660
¡Ý6900
24
Weight of the SF6
kg
25
Weight of the circuit breaker
1500
Note: external insulation levels is changed by modified coefficient. Every 2000m of altitude ,K=1.13: Altitude 3000m, k=1.28.