FZN25-12 Indoor Medium Voltage Vacuum Load Break Switch

Overview

The FZN25-12/FZ(R)N25-12D indoor high-voltage vacuum load switch and FZRN25-12D/T200-31.5 indoor high-voltage vacuum load switch-fuse combination unit are designed for three-phase AC 50Hz, 12kV distribution systems. These devices are oil-free, non-toxic, and pose no risk of fire or explosion, making them ideal for use in industrial and mining enterprises, as well as urban building substations. The combination unit provides more reliable protection for transformers and other electrical equipment than traditional circuit breakers, making it particularly suitable for ring networks, dual radiation power supply units, and box-type substations.

Operating Environment & Application Scope

•The load switch and combination unit are designed for three-phase AC 50Hz, 12kV distribution systems and are widely used in industrial enterprises, distribution substations, and substations as protection and control equipment.

•These devices can handle load currents, loop currents, no-load transformer, and cable charging currents. The FZRN25-12D/T200-31.5 combination unit is especially suitable for load control and short-circuit protection, with a grounding switch capable of closing short-circuit currents for enhanced system safety.

Operation and Functional Features

1.Multi-functional Design: The devices feature both manual and motorized operating mechanisms, facilitating remote control and operation of the power system.

2.Safety and Reliability: The products are oil-free and non-toxic, eliminating the risk of fire and explosion, making them ideal for use in urban buildings and industrial environments.

3.High Adaptability: Capable of operating in environments with pollution level IV, these devices are resistant to corrosive gases, steam, or salt mist, and have excellent wind resistance.

Operating Conditions

1.Temperature Range: -40℃ to +40°C, suitable for various climate conditions.

2.Altitude: Suitable for use at altitudes up to 3000m; the insulation level should be correspondingly increased with higher altitudes.

3.Pollution Level: Designed for use in pollution level IV environments, effectively dealing with dust, smoke, corrosive gases, steam, or salt mist.

4.Wind Resistance: Wind speed should not exceed 34m/s (equivalent to 700Pa on the cylindrical surface).

Precautions

•Ensure that the device meets the above operating environment requirements during installation and use.

•For special or non-standard conditions, please contact us to develop a suitable application plan.

Technical Information