| Model: | - |
|---|---|
| Brand: | - |
| Origin: | Made In China |
| Category: | Electronics & Electricity / Other Electrical & Electronic |
| Label: | - |
| Price: |
US $22120
/ pc
|
| Min. Order: | 1 pc |
| Last Online:27 Feb, 2019 |
Introduction
The LW□-252/4000-50 self-extinction Ac circuit breaker which is outdoor type finds its universal range of applications for the electrical system with elevation not greater than 2000m, ambient temperature not lower than-30C, dirtiness grade not higher than IV, alternating current 50Hz and the maximum voltage 126kV. It is used for cutting the rated current, malfunction current or switching the circuitry, to control and protect the electrical system, and it can also be used for connecting with the circuit breaker
The gas of the SF6 is employed as the arc-extinguishing medium and the dielectric material. The self-extinction technology and the new-type spring operating mechanism are introduced in the SF6 circuit breaker. Thus the circuit breaker has good qualities with long electrical life, low operation power, lower noise, high reliability, simple structure, small and long overhaul periods. It can fully replace the import same type one.
Caracteristic of structure
The breaker introduces the three-phase porcelain -pole with single interrupter structure. A spring operating mechanism is supplied and the mechanical action of the three-phase is inner connected. The gas of the SF6 is connected in the three-phase pole parts. A density controller with temperature compensation is used to monitor the gas of the SF6. Because of the self-extinction arc control principle and optimized design, it improves the efficiency of mechanism and reduces the operating power
Excellent breaking performance and long electrical life
High mechanism reliability and can be operated frequently
Because of the high insulation intensity and excellent contact movement, the breaking capacity current will not re-burn
The circuit breaker has high outer insulation level and ratio creepage distance is greater than. So it has excellent performance of resisting the filth and the earthquake, it is also can be operated safely under the environment with atrocious weather
High carrying ability: it has high capability margin as the temperature of each contact rises when it is under temperature rise test in the circuit (1.2 times 0f 4000A)
The appearance of the breaker is compact, and the installation and deb ing is very easy. The maintenance is also very convenient
|
No. |
Name |
Unit |
Value |
|
|
1. |
Rated voltage |
KV |
252 |
|
|
2. |
Rated power frequency withstand voltage(1 min) |
To earth |
KV |
460 |
|
Between interrupter |
460+146 |
|||
|
3. |
Rated thunder impulse withstand voltage |
To earth |
1050 |
|
|
Between interrupter |
1050+206 |
|||
|
4. |
Rated frequency |
HZ |
50 |
|
|
5. |
Rated current |
A |
4000 |
|
|
6. |
Amplitude factor |
1.3 |
||
|
7. |
Rated short-circuit breaking current |
KA |
50 |
|
|
8. |
Rated short-circuit making current(peak) |
KA |
125 |
|
|
9. |
Rated short-circuit withstand current |
KA |
50 |
|
|
10. |
Rated peak value withstand current |
KA |
125 |
|
|
11. |
Rated short-circuit duration |
S |
3 |
|
|
12. |
Rated out-of-phase breaking current |
KA |
12.5 |
|
|
13. |
Breaking current of close-in fault |
KA |
90%lk,75%lk |
|
|
14. |
Rated line-charging breaking current |
A |
200 |
|
|
15. |
Operating sequence |
0-0.3s-CO-180s-CO |
||
|
16. |
Resistance of the main circuit |
µΩ |
≤55 |
|
|
17. |
Rated gauge pressure of SF6(20℃) |
Mpa |
0.6 |
|
|
18. |
Minimum functional gauge pressure(20℃) |
Mpa |
0.55±0.015/0.50±0.015 |
|
|
19. |
Annual leakage rate of SF6 |
≤0.5% |
||
|
20. |
Amount of water of SF6(V/V) |
ppm |
≤150 |
|
|
21. |
Mechanical life |
times |
10000 |
|
|
22. |
Electrical level of radio interference |
µ V |
<500 |
|
|
23. |
Creepage distance |
Between interrupter |
mm |
≥8660 |
|
24. |
To earth |
≥6900 |
||
|
25. |
Each filled with SF6 gas weight |
kg |
25 |
|
|
26. |
Weight per breaker |
kg |
1500 |
|
Main technical data of structure
|
No. |
Name |
Unit |
Value |
|
|
1. |
Auxiliary circuit voltage |
V |
DC220V,AC220V |
|
|
2. |
The voltage/current of the opening and closing coils |
V/A |
DC110/4;Dc220/2.5 |
|
|
3. |
Energy storage motor |
Rated voltage |
V |
DC220V,AC220V |
|
The range of normal working voltage |
V |
5%-110% |
||
|
Power |
W |
600 |
||
|
4. |
The energy storage time of motor |
s |
≤15 |
|
|
5. |
The loop voltage of the heater and the lamp |
V |
AC220V |
|
|
6. |
Rated voltage of the auxiliary switch |
V |
DC220V,AC220V |
|
|
7. |
Rated current of the auxiliary switch |
A |
10 |
|
|
8. |
Contacts of the auxiliary switches |
10 normal opened contacts and 10 normal closed contacts |
||
Mechnical adjustment of the breaker
|
No. |
Name |
Unit |
Value |
|
1. |
Center distance between poles |
mm |
3000-4000 |
|
2. |
Strode length of the moving |
mm |
160±3 |
|
3. |
Contact stroke length of the moving contact |
mm |
50±2 |
|
4. |
Switch- off time |
m/s |
30±5 |
|
5. |
Switch- on time |
m/s |
90±15 |
|
6. |
Break time |
ms |
≤60 |
|
7. |
Switch-on/off time |
ms |
≤80 |
|
8. |
Switch- off/on time |
ms |
300 |
|
9. |
The time difference of the opening of three phases |
ms |
≤3 |
|
10. |
The time difference of the closing of three phases |
ms |
≤5 |
Order notice
The type and the specification of the circuit breaker.
Rated electric parameter(voltage, current, rated short-circuit breaking current and so on)
Environmental condition(temperature, altitude, filth level and so on)
Rated electric parameter of control loop(rated voltage of energy storage motor, rated voltage of the opening and closing coils).
The name and the number of the accessories when required.
The connection of the primary upper terminal.
1. Weight: 4500kg( with gas)
Total weight of gas: 24kg
2. Foundation load: static state 4500kg(three level)
1500kg(each pole)
Dynamic horizontal direction F: 2500kg
Vertical direction(upward): 3500kg;
Vertical direction(downward): 6000kg
3. Level degree of concrete surface not exceeds 1.5mm
4. Mounting hole for connection of terminal block and primary line, users shall drill as required on site
Material of terminal block: aluminum alloy 2A12-T4
| Payment Terms: | TT/LC |
|---|---|
