Item:high voltage sf6 circuit breaker Excellent Arc Extinguishing Performance: SF6 gas is highly effective at extinguishing electrical arcs. Compact Structure: The design is simple and space-efficient, allowing for easier integration. Good Opening Performance: Ensures reliable operation with balanced performance. Sealed Design: Minimizes operational noise for quieter performance. Low Maintenance Needs: Reduces inspection and maintenance workload significantly.
Item:high voltage sf6 circuit breaker
The LW36-72.5 is an outdoor three-pole AC 50 Hz high-voltage circuit breaker, designed primarily for the protection of power transmission and transformation lines. It can also serve as a tie circuit breaker. This breaker is assembled on a frame, and operation is not possible with just one pole.
Features:
Excellent Arc Extinguishing Performance: SF6 gas provides outstanding electrical insulation and arc extinction.
Superior Breaking Performance: Delivers effective breaking capabilities with low operating noise.
Compact and Simple Design: The structure is straightforward and space-efficient.
Low Maintenance Workload: Maintenance requirements are minimal, with longer intervals between maintenance cycles.
Item:high voltage sf6 circuit breaker
High-voltage SF6 circuit breakers are designed to operate effectively under a variety of environmental conditions. Key aspects of their working environment include:
Outdoor Installation:
These circuit breakers are typically installed outdoors and are designed to withstand weather elements such as rain, snow, and high humidity.
Temperature Range:
They can function effectively in a wide temperature range, often from -30°C to +40°C (-22°F to +104°F), depending on specific design standards.
Altitude:
SF6 circuit breakers are suitable for operation at high altitudes. However, performance may need to be adjusted at extreme elevations due to lower air density.
Pollution Levels:
Designed to resist the effects of environmental pollution, such as dust and salt, these breakers often have enhanced insulation and protective features
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 |
Insulation Failure:
Deterioration of insulation materials can lead to breakdown, allowing electrical arcing or short circuits.
Gas Leakage:
Loss of SF6 gas due to leaks can compromise insulation and arc-extinguishing capabilities.
Mechanical Malfunction:
Issues with mechanical components, such as the operating mechanism or linkages, can prevent the breaker from functioning correctly.
Overcurrent or Overload:
Excessive current beyond the rated capacity can cause overheating and damage to the circuit breaker.
A1:What is an SF6 circuit breaker?
Q1: An SF6 circuit breaker uses sulfur hexafluoride (SF6) gas as an insulating and arc-extinguishing medium to protect electrical circuits from overloads and faults.
A2: What are the key features of high-voltage SF6 circuit breakers?
Q2:Key features include excellent insulation and arc-extinguishing properties, compact design, low operating noise, and minimal maintenance requirements.
A3:What is the operating principle of an SF6 circuit breaker?
Q3:It operates by using SF6 gas to quench arcs that occur during circuit interruption, allowing for rapid and reliable disconnection of electrical faults.
A4:How does temperature affect the performance of SF6 circuit breakers?
Q4:SF6 circuit breakers are designed to operate effectively across a wide temperature range, but extreme temperatures may affect gas pressure and insulation properties.