LW30-126 SF6 Circuit Breaker is principle of self-energy arc extinguishing is adopted, and the breaking performance is excellent; the arcing time period, the electric life is long, and the operation noise is small. The SF6 gas with excellent insulation and arc extinguishing performance is used as the insulating arc extinguishing medium, which has no danger of burning and explosion, and can be used in densely populated areas. The circuit breaker is equipped with a spring operating mechanism, which is simple and compact, safe and reliable.
1. Before installing the SF6 pipeline, the pipeline must be thoroughly blown with dry nitrogen, and the sealing of all pipeline flanges should be good.
2. Before installing the air pipe, the pipe must be thoroughly blown with dry air. During the installation process, it is necessary to strictly prevent dust and sundries from falling into the pipe.
3. When filling with SF6 gas, measures should be taken to prevent the SF6 gas from getting wet.
4. After filling with SF6 gas, use a leak detector to check the pipe joints and flanges, and there must be no gas leakage.
5. In the compressed air system (nitrogen), all joints and flanges should be checked under the specified pressure, and no air leakage is allowed.
Model Description
L :Sulfur Hexafluoride Circuit Breaker
W:Outdoor
30 :Design Number
126:Rated voltage:110kV、126kV、145kV
▢:Rated current:3150A
▢:Rated short-circuit breaking current:31.5kA、40kA
Working Environment：
◆Installation method: side-mounted, middle-mounted
◆Ambient air temperature: upper limit +40℃, lower limit -30℃ ;
◆Altitude: ≤2000m (if the altitude needs to be increased, the rated insulation level should be increased accordingly);
◆Wind pressure: no more than 700Pa (equivalent to wind speed of 34m/s);
◆Amplitude: earthquake intensity 8 degrees;
◆Contamination level: Class I;
◆Maximum daily temperature difference: no more than 25℃.
Main Technical Parameters
|
Serial number |
Parameter |
Unit |
Value |
||
|
LW30-126W/T3150-40 |
LW30-126W/T4000-40(H) |
||||
|
1 |
Applicable environment |
|
Applicability in normal alpine regions |
||
|
2 |
Rated voltage |
kV |
110/126/145 |
||
|
3 |
Rated frequency |
Hz |
50(60) |
||
|
4 |
Rated current |
A |
3150 |
||
|
5 |
first opening coefficient |
|
1.5 |
||
|
6 |
Rated short-circuit breaking current Ik |
kA |
40 /31.5 |
||
|
7 |
Rated short-circuit making current (peak value) |
kA |
100/ 80 |
||
|
8 |
Rated short-circuit withstand current |
kA |
40 /31.5 |
||
|
9 |
Rated peak withstand current |
kA |
100/ 80 |
||
|
10 |
Rated short circuit duration |
S |
4 |
||
|
11 |
Rated out-of-step breaking current |
kA |
10 /8 |
||
|
12 |
Near zone fault breaking current |
kA |
90% IK, 75% IK |
||
|
13 |
Rated line charging switching current |
A |
31.5 |
||
|
14 |
Nominal Operation Sequence |
|
0-0.3S-C0-180S-C0 |
||
|
15 |
Main circuit resistance |
µΩ |
≤65 |
||
|
16 |
Mechanical life |
Second-rate |
6000 or 10000 |
||
|
17 |
radio interference level |
µV |
≤500 |
||
|
18 |
Creepage distance |
between fractures |
mm |
3906/3150 |
|
|
to the ground |
kg |
3906/3150 |
|||
Structure and Mounting Dimensions
Q: Can we get a sample for reference?
A: Yes, as long as the goods are conventional type, and you will be charged sample cost plus related shipping cost. Once you place an order to us, we can return or deduct the sample cost to you.
Q: How to solve the quality problems after sales?
A: Take photos of the quality problems and send to us for our checking and confirming, we will make a satisfied solution for you within 3 days.
Q: What is the lead time?
A: The lead time depends on the quantities ordered, generally within 25-35days upon the receipt of advance payment.
Q: What is your terms of payment ?
A: We accept West Union, T/T, irrevocable L/C at sight. Prefer T/T 30% deposit before production, the balance against copy of B/L.
Q: Can you print our brand on the product?
A: Yes, of course, we also do OEM to print client’s brand on the product
