designed for control and protection of the electric power distribution and transimission system with voltage up to 40.5kV
1.General Description
LW8-40.5 series outdoor high voltage SF6 circuit breaker is 3-phase DC 50 Hz outdoor high voltage equipment. Is designed for control and protection of the electric power distribution and transimission system with voltage up to 40.5kV. It could be also applied circuit breaker connection and switching operation of capacity bank.
2.Main Features
2.1 LW8-40.5 is outdoor tank structure,mechanism,simple structure, convenient debugging installation, maintenance cycle length.
2.2 Good breaking performance, arcing time short,break short current 40kA
capacity current 630A.
2.3 The high pollution levels,altitude ≤3000m
2.4 surface is deal with dacromet or hot-dip galvanizing,shell use Astainless steel materials, corrosion resistance capability.
2.5 Every phase with 4 CT, or outside CT,measure accuracy could reach 0.2s
2.6 Combined with the transition stent devices for the oil and other products to replace.
3.Main technical Data
No. | Name | Unit | Data | |
1 | Rated voltage | kV | 40.5 | |
2 | Rated insulation level | Lighting impulse voltage (rms) Power frequency withstand voltage 1min | kV kV | 185/215(break) 95/118(break) |
3 | Rated current | A | 2000 | |
4 | Mechanicalendurance | Time | 3000 | |
5 | SF6 gas rated pressure (20 ) | MPa | 0.45 | |
6 | SF6 gas re-filled pressure (20 ) | MPa | 0.42 | |
7 | SF6 gas lock-out pressure (20) | MPa | 0.40 | |
8 | Rated short circuit breaking current | kA | 31.5 | |
9 | Rated short circuit making current (rms) | kA | 80 | |
10 | Rated short withstand current (thermal stability current) | kA | 31.5(4s) | |
11 | Rated withstand current (rms) (dynamic stability current )(rms) | kA | 80 | |
12 | Rated out-phase breaking current | kA | 10 | |
13 | Close time (rated operation voltage ) | ms | t≤100 | |
14 | Open time (rated operation voltage) | ms | t≤65 | |
15 | Rated operation sequence |
| o-0.3s-co -180s-co | |
16 | Rated CO single capacity bank current | A | 400 | |
17 | Annual leakage of gas | % | £1 | |
18 | SF6 moisture content20 | ppm (v/v) | £150 | |
LW8-40.5 Series Outdoor High Voltage SF6 Circuit Breaker
