Primary & Secondary Integrated Pole-Mounted SF6 Load break Switch 12kV

  • Primary & Secondary Integrated Pole-Mounted SF6 Load break Switch 12kV
Key attributes
Brand ROCKWILL
Model NO. Primary & Secondary Integrated Pole-Mounted SF6 Load break Switch 12kV
Rated voltage 12kV
Rated normal current 630A
Rated frequency 50/60Hz
Series FLW34
Product descriptions from the supplier
Description

 Product Overview

The FLW34-12/630-20 Outdoor AC High-Voltage Load Switch is a three-phase outdoor high-voltage device designed for 12kV, 50Hz power systems. It is engineered for urban and rural overhead distribution networks, where it reliably switches load currents, closes short-circuit currents, and interrupts no-load transformer currents and cable charging currents over short distances.
This primary-secondary integrated model combines switching performance with intelligent monitoring capabilities, making it an ideal solution for modern smart grid applications.

 Key Features

  • High-Purity SF6 Insulation & Arc Extinguishing: Uses 99.99% pure SF6 gas for excellent insulation and fast arc extinction, ensuring safe and stable operation.
  • Hermetically Sealed Stainless Steel Housing: Argon arc-welded stainless steel enclosure provides superior corrosion resistance and airtightness, protecting internal components from harsh outdoor conditions.
  • Low-Energy Storage Motor: Reduces power consumption for electric operation, lowering long-term operational costs.
  • All-Weather Adaptability: Performs reliably in extreme temperatures, high humidity, and heavy pollution, making it suitable for diverse outdoor environments.
  • 100% Maintenance-Free Design: The fully sealed structure and corrosion-resistant materials eliminate the need for regular servicing, minimizing lifecycle costs.
  • Low-Pressure Lockout: Automatically triggers mechanical and electrical locking when SF6 pressure drops to 0.03–0.07MPa, preventing unsafe operation.
  • High-Strength Insulation: Delivers robust dielectric performance to withstand transient overvoltages and pollution levels up to Class IV.
  • Explosion-Proof Safety Device: Equipped with a pressure relief mechanism that safely releases internal pressure during faults, protecting personnel and equipment.

Technical Specifications

Parameter Specification
Rated Voltage 12kV
Rated Frequency 50Hz
Rated Current 630A
Rated Short-Time Withstand Current (4s) 20kA
Rated Peak Withstand Current 50kA
Controller Operating Voltage AC 220V
Auxiliary Circuit Voltage DC 24V
Mechanical Life 3,000 operations
Service Life ≥15 years
Rated SF6 Gas Pressure (25°C, gauge) 0.12MPa
Annual SF6 Leakage Rate ≤1%
Operation Mode Spring-actuated (manual/electric/intelligent)
Operating Environment
  • Temperature Range: -35°C to +40°C
  • Altitude: ≤1,000m (custom insulation available for higher elevations)
  • Pollution Class: IV
  • Seismic Resistance: ≤8 degrees
  • Wind Speed: ≤35m/s

 Application Scenarios

  • Urban & Rural Distribution Grids: The core switching device for 12kV overhead feeder lines in city and rural power networks.
  • Smart Grid Integration: Primary-secondary integration supports remote monitoring and control, enabling efficient fault handling and grid automation.
  • Industrial Power Supply: Protects outdoor power distribution for factories, mines, and industrial parks.
  • Renewable Energy Projects: Used in solar and wind farm distribution systems to manage load currents and integrate with grid protection schemes.
  • Critical Infrastructure: Ensures reliable power supply for hospitals, data centers, and commercial facilities via outdoor feeder lines.
 
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