LW3 (PGS)-12 Outdoor High-voltage Sulfur Hexafluoride Circuit Breaker
Contact Info
- Xiangyang Industrial Zone, Liushi Town, Yueqing City,
- 李经理
- 15167417505
- 864640886@qq.com
The LW3-12 series circuit breakers are high-voltage electrical equipment that uses SF6 gas as the arc extinguishing and insulating medium. They are mainly applied to power systems with a rated voltage of 12kV and a rated frequency of 50Hz, and are particularly suitable for undertaking control and protection functions in small and medium-sized substations and distribution branch lines.
I. Product Overview and Features
This product is an updated product in the construction of urban and rural power grids, and its performance-to-price ratio is better than other outdoor circuit breakers of the same voltage level.
Main features include:
Compact structure: Adopts a three-phase common tank design, with simple structure and compact layout.
Reliable performance: Applies rotating arc technology, which improves arc extinguishing efficiency and electrical service life. Its arc extinguishing and insulation performance are reliable, and it has a long electrical life.
Convenient operation: The power output is rotary type, with good sealing effect. The moving mass of the body is small, which reduces the operating force and extends the mechanical service life.
Easy maintenance: Compared with vacuum and oil circuit breakers, it has significant advantages in terms of structure, weight, safety, maintenance and cost.
Flexible configuration: The body structure is independent, and products with different performances and installation methods can be derived. Special arrangements can be made according to user needs, and protection and measurement transformers with different transformation ratios can be configured.
II. Main Technical Parameters
| Serial Number | Item Name | Parameter |
|---|---|---|
| 1 | Rated Voltage | 12 kV |
| 2 | Rated Current | 400 A, 630 A, 1000 A |
| 3 | Rated Short-circuit Breaking Current | 6.3 kA, 8 kA, 12.5 kA, 16 kA, 20 kA |
| 4 | Rated Short-circuit Making Current (peak value) | 16 kA, 20 kA, 31.5 kA, |
| 5 | Rated Short-time Withstand Current | 8 kA, 12.5 kA, 16 kA, 20 kA |
| 6 | Rated Thermal Stability Time | 4 s |
| 7 | Rated Operating Sequence | Open - 180s - Close-open - 180s - Close-open (Type Ⅰ) / Open - 0.5s - Close-open - 180s - Close-open (Type Ⅱ) |
| 8 | Rated Gas Pressure (20°C) | 0.35 MPa |
| 9 | Working Gas Pressure (20°C) | 0.25 MPa |
| 10 | Mechanical Service Life | ≥ 2000 times?5 or 3000 times |
| 11 | Annual Gas Leakage Rate | ≤ 1% |
| 12 | Breaking Current at Zero Gauge Pressure | 400 A, 630 A |
III. Operating Environmental Conditions
This series of circuit breakers is suitable for the following environments:
Altitude: No more than 1000 meters.
Ambient Temperature: -40°C to +40°C.
Pollution Level: Suitable for Grade Ⅱ and Grade Ⅲ polluted environments.
Installation Site: No fire or explosion hazards, no severe pollution, chemical corrosion or severe vibration.
Wind Pressure: No more than 700Pa (equivalent to wind speed of 34m/s).
Seismic Intensity: No more than 8 degrees.
IV. Product Model and Configuration
The products are mainly divided into Type Ⅰ and Type Ⅱ, the difference lies in the equipped operating mechanism:
LW3-12 Type Ⅰ: Equipped with manual energy-storage spring operating mechanism, mainly used for pole-mounted installation.
LW3-12 Type Ⅱ: Equipped with electric energy-storage spring operating mechanism. In addition to local manual operation, it can also realize remote control and automatic reclosing operation, and is suitable for small and medium-sized substations.
V. Ordering Instructions
The following information needs to be clarified when ordering:
Product model, specification and rated parameters.
Required quantity and delivery date.
Category and transformation ratio of the installed current transformers.
Control voltage and power supply type (AC or DC) of Type Ⅱ circuit breakers.
Distribution mode of incoming and outgoing line terminals (horizontal or vertical).
Whether the gas pressure gauge needs electric contacts.
Other special requirements, such as the transformation ratio and accuracy of special current transformers, changes in installation methods, etc.
| Electrical Equipment & Supplies/High Voltage Electrical/High Voltage Circuit Breakers | |
