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MV Distribution Air insulated pole mounted load break switches LBS11-15KV
General
All overhead power transmission lines require an Air Break Switch, which is primarily used to connect or disconnect (on/off switching) the power system of a specific section of overhead line and transformer from the main distribution line. This enables the user to isolate a section of the overhead wire without disrupting the remaining power transmission system.
Service and Installation Conditions
- Service and Installation Conditions
1.1. height above sea level: ≤3000m
1.2. Air temperature: -40℃～+50℃
1.3. Relative humidity: Daily mean 95%, monthly average 90%
1.4. Maximum wind speed: ≤34m/ｓ
1.5. Earthquake intensity: ＜8 degree
1.6. Icing thickness: ＜10mm
1.7. Thickness of snow: ＜35mm
1.8. Irradiance: ＜0.1W/cm2
1.9. Pollution grade: Ⅲ class、Ⅳclass
1.10. Installation site: No fire disaster, explosion danger, chemical corrosion and frequent strenuous vibration places
Product structure
Model and Definitions
Technical parameters
|
Item |
Unit |
Data |
||
|
Rated voltage |
kV |
12 |
24 |
36 |
|
Rated frequency |
Hz |
50/60 |
||
|
Rated current |
A |
400 / 630 |
||
| Rated short-circuit withstand/breaking current |
kA |
12.5 |
||
| Rated short-circuit making current (peak) |
kA |
31.5 |
||
| Rated peak withstand current |
kA |
31.5 |
||
| Rated short-circuit time |
Sec |
1 |
||
| Mechanical Operations |
Times |
5000 |
||
| Power frequency withstand voltage (1 min) |
kV |
28/32 |
50/60 |
70/80 |
| Lightning impulse withstand voltage (peak) |
kV |
76/85 |
125/145 |
170/190 |
>> Service conditions
Hydropower station #1
Factory and mining enterprises #2
Ring network power supply #3
Petrochemical Enterprises #4
COMPANY INTRODUCTION
