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LW58 - 252 outdoor self energy high-pressure sulfur hexafluoride circuit breaker is a three-phase ac 50 hz outdoor high voltage electric transmission and transformation equipment, By Opening or closing the rated current and fault current and conversion circuit to realizing the protection,control and operation of the power transmission and transformation system. The product can open or close brake and operate the auto reclosing very fast and realize the linkage of three pole electric.
The circuit breaker using the latest design principle, And it has much feature such as simple construction,small volume material consumption, It is necessary to the operation of the energy is small and high reliability,easy to install,low noise and so on. It is developed a new generation of high-pressure sulfur hexafluoride circuit breakerby ourselves.
2 Use of environmental conditions
2.1Ambient temperature: -40--+ 50
2.2Wind pressure:≤700 pa
2.3Altitude:≤3000m
2.4Seismic intensity:≤9degrees
2.5Air polluted degree: level
3 Nominal parameter
No. | Name | Main technical parameters |
1 | Rated voltage, KV | 220 KV, 252KV |
2 | Rated insulation level,kV
| See table 2 |
3 | Rated frequency,Hz | 50 |
4 | Rated current,A | 2500 |
5 | Rated short circuit breaking current,kA | 40 |
6 | Rated short-time withstand current,kA | 40 |
7 | Rated peak withstand current,kA | 100 |
8 | Rated short time continual time,s | 3 |
9 | Rated peak withstand current,kA | 100 |
10 | Short-line fault breaking current,kA | 30/36 |
11 | Rated clearing energized current,A | 125 |
12 | Rated out-of-phase breaking current,kA | 10 |
13 | Accumulative opening times of rated short circuit on power flow,time | 20 |
14 | First pole to clear factor | 1.3 |
15 | Pressure of SF6-gas(20),MPa | See table 3 |
16 | The rated voltage of control circuit and auxiliary circuit | See table 4 |
17 | Rated operating sequence | open-0.3s-close- open-180s-close- open | |
18 | Mechanical behavior | See table 5 | |
19 | Major loop resistance,μΩ | £50 | |
20 | Static tension of terminal | Longitudinal FshA N | 1500 |
Horizontal FshB N | 1000 | ||
Vertical direction FtVm N | 1250 | ||
21 | Mechanical endurance of circuit breaker,time | 5000 | |
22 | Leakage rate of SF6-gas in one year | ≤1% | |
23 | moisture content of SF6-gas(V/V) ,10 | ≤150 | |
24 | Stroke of the contact,mm | 200 | |
25 | Contact connection stroke,mm | 28 | |
