Ⅰ Product Overview:
Lw3-12 Sulfur Hexafluoride Circuit Breaker is a type of high-voltage electrical equipment suitable for power transmission and distribution systems. This product is widely used in various fields such as power plants, substations, industrial and mining enterprises, petrochemicals, metallurgy, and other urban power grid systems.
The switch structure is compact, the layout is reasonable, and all the tests meet the requirements of primary and secondary fusion of the State network; The unified parameter protection CT, zero sequence CT and zero sequence voltage sensor has the characteristics of wide measuring range, high measuring accuracy and high reliability, and complete analog quantity is convenient to accurately determine various line faults.
Ⅱ Structure:
Lw3-12 Sulfur Hexafluoride Circuit Breaker comprises several essential components, including an operating mechanism, interrupter unit, and control cabinet. The operating mechanism provides energy required for switching operation, and it can be manually or electrically operated.
The interrupter unit includes an SF6 arc-extinguishing chamber, contact system, and other auxiliary devices. The SF6 circuit breaker uses SF6 gas as an arc-extinguishing and insulating medium to achieve excellent breaking and short-circuit current interruption performance. The contact system is used to establish and break the circuit. The control cabinet comprises a control circuit, protection devices, and other auxiliary devices used to control and protect the circuit breaker.
Ⅲ Main Technical Parameters:
|
No. |
Parameters |
Unit |
Parameter Value |
|
|
1 |
Rated Voltage |
kV |
12 |
|
|
2 |
Rated insulation level |
kV |
42 |
|
|
a) lmin frequency withstand voltage (rms) |
kV |
42 |
||
|
Fracture |
kV |
48 |
||
|
to ground |
kV |
42 |
||
|
b)Rated lightning impulse withstand voltage (peak) |
kV |
85 |
||
|
Fracture |
kV |
85 |
||
|
To ground |
kV |
75 |
||
|
3 |
Rated frequency |
Hz |
50 |
|
|
4 |
Rated current |
A |
630 |
|
|
5 |
Rated short-time withstand current |
kA |
20 |
|
|
6 |
Rated short-circuit closing current (peak) |
kA |
50 |
|
|
7 |
Rated peak withstand current |
kA |
50 |
|
|
8 |
Rated short-circuit duration |
4 |
||
|
9 |
Rated operating sequence |
O-0.3s-CO-180s-CO |
||
|
10 |
Rated short-circuit current breaking times |
Ops |
30 |
|
|
11 |
Mechanical life |
Ops |
10000 |
|
|
12 |
Rated voltage of energy storage motor |
V |
24V/110V/220V |
|
|
13 |
Rated operating voltage |
Opening coil |
V |
24V/110V/220V |
|
Closing coil |
||||
|
14 |
SF6 gas rated pressure (gauge pressure) |
Mpa |
0.35 |
|
Ⅳ The main features:
1. The main box shell of the circuit breaker is made of 3mm stainless steel plate, which is a fully sealed structure, the protection grade is IP67, and the annual leakage rate of SF6 gas shall not be greater than 0.5%.
2. The shell is located on the ground easy to observe, obvious opening and closing position indicator, the indicator is reliably connected with the operating mechanism, indicating reliable action. The surface of the shell is raised, and it will not store water for a long time.
3. the diameter of 12mm anti-rust ground screw, ground point marked with grounding symbol.
4. The shell has a handling handle to avoid pulling out the line casing. The hoisting ring can keep the switchgear in suspension level, and there is no friction contact between the hoisting chain and any part, so as to avoid scratching the spray layer on the surface of the box during the hoisting process.
5. The circuit breaker is configured with three-phase current transformer, zero sequence current transformer and zero sequence voltage sensor. Current transformer ratio: phase current 600/1 (5); Zero sequence current 20/1; Accuracy level: The measurement accuracy level is 0.5, and the protection is 10P(5P10). Zero sequence current accuracy level 10P5; Zero sequence voltage accuracy class is 3P. Measurement and protection CT capacity: >1VA (600A/1A), >2.5VA (600A/5A) zero-sequence CT capacity: 20.5VA, to meet the supporting requirements (considering the cable length of 12 meters, cooperate with FTU and line loss module to meet the line loss measurement and fault determination requirements).
6. configuration and interface with a common box structure, spring mechanism. The circuit breaker has a set of built-in current transformer to provide 1a, Ib, Ic, I0 current signals. A zero sequence voltage sensor is built into the circuit breaker. Aviation socket, aviation plug and cable should be fully sealed waterproof structure.
Ⅴ Advantages:
Functional and safe performance are good.
Compact switch structure, reasonable layout,
All tests are in line with the requirements of primary and secondary fusion of the State grid;
It has the characteristics of wide measuring range, high measuring accuracy and high reliability, and complete analog quantity, which is convenient to accurately determine various faults of the line.
OEM/ODM Services:
At Shaanxi Yuguang Electric Co., Ltd., we understand the importance of customization. That's why we offer comprehensive OEM and ODM services to meet your specific requirements. Whether you need private labeling or custom product development, our experienced team is here to assist you every step of the way.
Certificates:
We take pride in our commitment to quality and safety. Our products are certified to meet the highest industry standards, including:
3C Certification
ISO 9001 Certification
21 Utility Model Patents and Design Patents

Why Choose Us:
State-of-the-art Manufacturing Equipment
Extensive Testing Facilities
Comprehensive Quality Assurance Processes
ISO 9001 Certified Quality Management System
One-year Warranty on All Products
Large Production Capacity
FAQ:
Q: What is the warranty period for your products? A: We offer a one-year warranty on all our products.
Q: Can you customize products according to our specifications? A: Yes, we provide OEM and ODM services to meet your specific requirements.
Q: Are your products compliant with international standards? A: Yes, our products meet all relevant international standards.
Q: What is the lead time for orders? A: The lead time depends on the quantity and customization requirements. Please contact us for more information.
Q: Do you provide technical support? A: Yes, we offer comprehensive technical support to our customers.
Packaging:
Wooden Box Packaging
Carton Packaging
Foam-filled Packaging
Waterproof and Moisture-proof Packaging
Customized Packaging
International Standard Packaging
Logistics:
Sea Freight
Air Freight
Land Transportation
Multimodal Transport
Express Delivery Services
Contact Us:
Ready to take your electrical projects to the next level? Contact us today at ygvcb@hotmail.com to discuss your requirements and explore partnership opportunities with Shaanxi Yuguang Electric Co., Ltd. Let's create a brighter future together.


