FZRN25-12D Indoor 12kV 3-Phase Vacuum Pressurised Air Load Break Switch Combination

FZRN25-12D Indoor H.V. Vacuum Pressurised Air Load Break Switch

Product Overview

The FZRN25-12D is an advanced indoor vacuum load switch and combined electrical apparatus designed for 12kV, AC 50Hz three-phase ring networks or terminal power supplies. It is engineered for load control and short-circuit protection, capable of breaking currents up to the rated short-circuit level. This switch is ideal for industrial electrical equipment, managing load on and off-loads, closed-loop currents, and cable recharging currents.

Key Features & Advantages

• Innovative Compact Design: Features a unique transmission structure where the arc extinguishing chamber only bears high pressure during closing and breaking, resulting in a smaller size and lighter weight.

• One-Time Operation: Realizes synchronized, one-time operation of both the isolation fracture and the interrupter fracture.

• Enhanced Safety: Equipped with a grounding valve interlocked with the grounding switch located between the static and moving contacts to ensure operator safety and facilitate maintenance.

• Versatile Functionality: Includes both manual and electric operation functions to suit different distribution requirements.

Technical Specifications

Environmental Conditions

• Ambient Air Temperature: Upper limit of +40°C and a lower limit of -25°C.

• Altitude: Installation site altitude should not exceed 1000m.

• Humidity: Daily average relative humidity ≤ 95%; monthly average ≤ 90%.

• Air Quality: Surrounding air must be free from significant pollution by corrosive or flammable gases and water vapor.

• Seismic Intensity: Should not exceed 8 degrees.