| Customization: | Available |
|---|---|
| Breaking Capacity: | High Voltage Circuit Breakers |
| Operation: | Electric Type |
|
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Application
SF6 circuit breakers are widely used in high-voltage power systems due to their excellent arc-quenching performance and compact design. Key applications include:
1.High-voltage transmission networks (72.5 kV-800 kV) for fault interruption and gridprotection.
2.Gas-insulated switchgear (GlS) in urban substations, where space efficiency and pollutionresistance are critical.
3.Renewable energy plants (wind/solar farms) to manage frequent switching and faultcurrents.
4.Industrial power systems for protecting large motors, transformers, and distributionnetworks.
5.Railway electrification, ensuring safe interruption of 25 kV AC traction power.
Keystone
SF6 circuit breakers are indispensable in modern power systems because of their:
1.Superior arc extinction: SF6 gas rapidly absorbs free electrons, quenching arcs 100x fasterthan air.
2.High dielectric strength: Allows for compact designs, reducing substation footprint.
3.Low maintenance: Sealed construction ensures long service life (20+ years) with minimalupkeep.
4.Environmental adaptability: Operates reliably in polluted, humid, or extreme climates.
5.Flexible configurations: Available in dead-tank, live-tank, and GlS-compatible designs.
Usual Service Conditions
SF6 circuit breakers are designed to operate under the following standard conditions:
1.Ambient temperature: -30°c to +40°C (special designs available for extreme climates).
2.Altitude: Up to 1000 m above sea level (derating may apply for higher elevations).
3.Humidity: s95% relative humidity (non-condensing).
4.Installation: Suitable for indoor (Gls) or outdoor installations.Mechanical endurance: 2,000-10,000 operating cycles, depending on design.Electrical endurance: Capable of interrupting rated short-circuit currents (up to 63 kA ormore).
| Parameter | Specification | Unit |
| Rated Voltage | 72.5-800 | kV |
| Rated Current | 1250-6300 | A |
| Rated Short-circuit Breaking Current | 25-63 | kA |
| Rated Short-time Withstand Current | 25-63 (3s) | kA |
| Rated Peak Withstand Current | 63-160 | kA |
|
No. |
Name |
Main technical parameters |
|
1 |
Rated voltage, KV |
245 , 252 |
|
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 |
FAQ
Q 1. Are you a factory or trading company?
A.We are a factory.
Q 2. Where is your factory located? How can I visit there?
A. Our factory is located in Wenzhou City, Zhejiang Province, China. You can fly to Longwan airport directly. All our clients,from home or abroad, are warmly welcome to visit us!
Q 3. What's the payment term?
A. We accept TT, 30% deposit and 70% before shipment, Western Union, L/C At Sight is ok! We'll show you the photos of the products and packages before you pay the balance.
Q 4. Tell me the standard of package? What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q 5. Would you accept to use our logo ?
A. If you have good quantity,it absolute no problem to do OEM.
Q 6. How about the transport?
A. If the number of goods is small we usually use TNT,DHL,FEDEX,EMS and some express you offered. If the number of the goods is big usually we use the FWD you offered or we provided. Either by sea or by air is OK.
Q 7. What is your Production lead time / delivery time?
A: Generally, it will take 25 to 30 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Silicone rubber's regular product is 1,000/ week , Porcelain's need 2-3 weeks about 1000 pcs.
Q8. How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
A: 2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.
A: 3.Most goods we have the type report according the IEC STANDARD
Q9. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the courier cost.
Q10. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q11. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q12.What certificates do you have?
A:ISO9001,OHSAS18001,ISO14001 certificate and Type test report of product.
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