LW8-40.5 35kV Outdoor AC High Voltage SF6 Circuit Breaker

The LW8(A)-40.5 outdoor AC SF6 Circuit Breaker is a three-phase, 50Hz outdoor high-voltage electrical device designed for use in power systems with a rated voltage of 40.5 kV. It utilizes SF6 gas as the arc-quenching and insulating medium, with a compressed gas arc-extinguishing mechanism, providing superior interrupting capability. This circuit breaker is suitable for applications in power substations, power plants, and distribution networks where it can reliably switch both rated and short-circuit currents. It is also ideal for use as a link breaker or for disconnecting capacitor banks. The device includes a built-in current transformer for measurement and protection purposes, making it an excellent choice for upgrading older breaker systems.

Product Structure

The breaker features a porcelain column design with three distinct phases, each equipped with a separate arc-extinguishing chamber filled with compressed air. The three-phase gas is connected by copper tubing. The key components of the breaker include the porcelain housing, current transformer, arc extinguishing chamber, absorber, operating mechanism, transmission box, base frame, connecting rods, and springs. The porcelain sleeve serves as the support and insulation for connecting the breaker’s main circuit to the power system. It also forms part of the pressure vessel, providing robust strength and ensuring airtightness.

Applications:

• Power Transmission and Distribution: Suitable for use in substations, transformer stations, and power distribution networks.
• Switching Operations: Effectively handles rated currents, short-circuit currents, and emergency disconnections.
• Capacitor Bank Protection: Can disconnect capacitor banks safely, ensuring smooth system operations.
• Ideal Replacement: A great option for replacing older, outdated circuit breakers in the system.

Environmental Conditions:

• Altitude: Up to 3000 meters above sea level.
• Ambient Temperature: From -30°C to +45°C.
• Pollution Level: Suitable for environments classified as Level II, III, or IV.
• Humidity: Daily average humidity not exceeding 95%, with a monthly average of no more than 90% (at 25°C).
• Wind Pressure: Not exceeding 700Pa, equivalent to wind speeds up to 34 m/s.
• Usage Conditions: Ideal for areas free from flammable materials, explosion risks, chemical corrosion, and severe vibrations.

LW8-40.5  SF6 Circuit Breaker  Technical Parameters

LW8-40.5 SF6 Circuit Breaker Dimension Drawing Reference

LW8-40.5 SF6 circuit breaker ordering instructions
Circuit breaker model, specifications;
Rated electrical parameters (voltage, current, breaking current, etc.)
Environmental conditions (ambient temperature, altitude, environmental pollution level);
Actuator operating voltage and motor voltage;
Number, current ratio, and level combination of internal or external current transformers. Secondary load;
Name and quantity of spare parts, special tools, and equipment (need to be ordered separately).