Our factory
We are professional manufacturer of current transformer ,voltage transformer, Vacuum Circuit Breakers/Recloser,Isolation switches,Dropout Fuse Cut-out,Lightning Arresters,High and Low Voltage Cabinets,Metering Devices,Power Distribution Transformers etc.
General
LW3-12/630-20 intelligent outdoor high voltage pole-mounted SF6 circuit breaker is a new generation product developed by our company in response to the new requirements of the state grid for the primary and secondary contact of the pole-mounted switch. The switch configuration fully meets the requirements of the state grid for the primary and secondary contact of the complete set, which is convenient for the state grid to purchase uniformly and produce in batches. The switch is compact in structure, reasonable in layout, and complete in functions, and its standard meets the requirements of Guotong for secondary integration; The protection CT, zero sequence CT and zero sequence voltage sensor with unified parameters are characterized by wide measurement range, high measurement accuracy, and high reliability. The horizontal measurement is convenient for accurately determining various faults of the line. It is an ideal switching device to achieve "distribution network automation" and has the ability to split and close load currents, overload currents, and short circuit currents.
Main Advantages
The circuit breaker is designed according to the technical and process requirements of the switch without maintenance. With a simple structure, excellent arc extinguishing and insulation performance, small operation power, high rated parameters, long electrical life, and maintenance-free period (20 years), and other significant advantages: ☆ The shell is made of stainless steel, meeting the corrosion resistance requirements for permanent use;
☆ Explosion proof pool pressure device is added to prevent the circuit breaker from bursting due to the increase of arc fault pressure inside the switch;
☆ The incoming and outgoing line terminals are changed into insulated terminals, which can effectively avoid the interphase flashover fault caused by external factors;
☆ Low air pressure locking device is installed to make the air pressure under dual control, which improves the reliability of switch operation;
☆ Change the incoming and outgoing line end sleeves to organic insulator type, completely eliminating the crack of porcelain bottle caused by external force and lightning and the crack caused by porcelain factor, greatly improving the reliability of circuit breaker operation;
☆ Manual locking device is installed to effectively prevent misoperation during power failure operation;
☆ The interphase distance of the switch is increased to 250mm, which can greatly reduce interphase flashover and short circuit faults;
☆ The process of inlet and outlet bushing is improved to effectively prevent interphase flashover caused by electric discharge during switch operation;
☆ The inrush current controller can be installed, which can effectively screen the closing inrush current, and facilitate the setting of overcurrent delay and overcurrent break protection.
☆ Automatic controller is provided, which can be operated manually. It can not only be operated locally but also be controlled remotely or the main control can be combined with the FTU interface. The use of this product can not only reduce the floor area, reduce the project cost and eliminate the fire hazard, but also improve its functional characteristics and anti-corrosion performance, which can greatly improve the operation reliability of the power system.
Model Description
Usage: Environmental Conditions
- Altitude: ≤ 3000m,
- Ambient temperature: -40 oC ~ +45 oC,
- Maximum daily temperature difference: ≤ 25 K
- Humidity: ≤ 95%,
- Wind Speed: 34m/s
- Wind pressure: 700Pa
- Pollution level: III Type, IV Type
- Seismic Intensity: 8 level
- Installation Site:No fire, explosion, chemical corrosion and frequent violent vibration.
Main Technical Parameters
| No. |
Item |
Unit |
Data |
| 1 |
Rated Voltage |
kV |
12 |
| 2 |
Rated Insulation Level |
Lightning Impulse Withstand Voltage (Full-wave Peak Value) |
75 |
| Power Frequency Withstand Voltage (1 minute) |
42 |
| Rain Withstand Voltage Test |
34 |
| Reverse Phase impact Pressure |
85 |
| 3 |
Insulation level under zero gauge pressure |
Power Frequency Withstand Voltage (1 minute) |
30 |
| Reverse Phase Withstand Voltage (1 minute) |
30 |
| Maximum Phase Voltage (5 min) |
|
9 |
| 4 |
Rated Current |
|
400, 630 |
| 5 |
Rated Short-Circuit Breaking Current (0.25MPa, 200C time) |
Times |
16, 20 |
| 6 |
Outgoing phase grounding reclosing breaking current |
Mpa |
14, 17.4 |
| 7 |
Breaking current under zero gauge voltage |
Mpa |
400, 630 |
| 8 |
Rated Operating Sequence |
Type I |
|
O - 180s - C/O - 180s - C/O |
| Type II |
|
O - 0.3s - C/O - 180s - C/O |
| 9 |
Rated Short-Circuit Closing Current (Peak Value) |
kA |
40, 50 |
| 10 |
Rated Withstand Current (Peak Value) |
40, 50 |
| 11 |
Rated Short-time Withstand Current |
16, 20 |
| 12 |
Rated Short-circuit Continuous Time |
4 |
| 13 |
Rated winding charging breaking current |
25 |
| 14 |
Rated line charging breaking current |
S |
16 |
| 15 |
Rigid closing speed |
2.0 ± 0.2 |
| 16 |
Rigid component speed |
3.6 ± 0.2 |
| 17 |
Opening distance of dynamic and static contacts |
|
37 ± 2 |
| 18 |
Total travel of the conductive rod |
A |
58 ± 2 |
| 19 |
Conducting rod overtravel |
Times |
22 ± 2 |
| 20 |
Three-phase synchronism of opening and closing |
% year |
≤ 2 |
| 21 |
Main circuit resistance of each phase |
PPm (V) |
≤ 130 |
| 22 |
Rated Working Pressure |
V |
0.35 (200C) |
| 23 |
Minimum Working Pressure |
|
0.25 (200C) |
| 24 |
Annual Gas Rate |
|
≤ 0.05 |
| 25 |
Mechanical Stability Operation |
Kg |
10000 |
| 26 |
Water content of SF6 gas |
|
≤ 150 |
| 27 |
Weight |
|
150 |
| Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate. |
Outline And Installation Dimension
Our Customer
Our customers are located all over the world.
Test Reports
All products have undergone professional testing and certification.
Photos of Product
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