66kv 72.5kv High Voltage Outdoor LW36-72.5 SF6 Circuit Breaker uses sulfur hexafluoride (SF6) gas as the arc extinguishing medium. The sulfur hexafluoride gas not only has good arc extinguishing performance, but also has very good electrical insulation performance. When compressed by the gas cylinder, it sprays to the arc and extinguishes the arc. The simple principle of breaking is shown in Figure 1. The circuit breaker has many advantages, such as simple structure, good breaking performance, and balanced operation. It is also an ideal switch for capacitor banks and reactor banks.
66kv 72.5kv High Voltage Outdoor LW36-72.5 SF6 Circuit Breaker can break various abnormal short circuits smoothly, such as grounding of two poles on both sides of the circuit breaker at the same time in reversed-phase state, near-zone faults, and other faults including the end faults of the circuit breaker. It has low noise in operation, simple structure and compact size. Due to the simple structure and the small burning loss of the arc extinguishing chamber contacts of the circuit breaker when it is interrupted in sulfur hexafluoride gas, the maintenance workload of the circuit breaker is small, and the maintenance work of the circuit breaker is small. The cycle is relatively long.The sulfur hexafluoride circuit breaker has a long service life, a long maintenance cycle, and can adapt to frequent operations in a short period of time, with good safety and durability. Under the condition of full capacity of 50kA, the sulfur hexafluoride circuit breaker can continuously open and close 19 times, and the accumulated current of interruption has reached 4200kA.
Model Description
L :Sulfur Hexafluoride Circuit Breaker
W:Outdoor
36 :Design Number
72.5:Rated voltage:72.5kV
▢: Rated current:2500A、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 |
|
1 |
Rated voltage |
kV |
72.5 |
|
2 |
Rated current |
A |
2500/3150 |
|
3 |
Rated short-circuit breaking current |
kA |
31.5/40 |
|
4 |
Rated short-circuit making current (peak value) |
kA |
80 |
|
5 |
Rated short-time withstand current |
kA |
31.5/40 |
|
6 |
Rated short circuit duration |
S |
4 |
|
7 |
Rated peak withstand current (peak) |
kA |
80 |
|
8 |
Near zone fault breaking current |
kA |
31.5×75% |
|
9 |
Rated out-of-step breaking current |
kA |
31.5×25% |
|
10 |
first open pole coefficient |
|
1.5 |
|
11 |
Opening time |
S |
≤0.03 |
|
12 |
Breaking time |
S |
≤0.06 |
|
13 |
Closing time |
S |
≤0.15 |
|
14 |
split time |
S |
≥0.3 |
|
15 |
united time |
S |
0.06 |
|
16 |
Weight of sulphur hexafluoride gas charged into circuit breaker |
kg |
3.5 |
|
17 |
Circuit breaker gross weight |
kg |
1000 |
|
18 |
Mechanical life |
Second-rate |
3000 |
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
