Indoor AC HV Vacuum Load Break Switch

Indoor AC high-voltage vacuum load switch (hereinafter referred to as load switch) is suitable for three-phase AC 50Hz, 12kV power supply network, as a break load current and close short-circuit current. The product can be equipped with manual and motor operating mechanisms, especially suitable for places with severe conditions, long maintenance cycles and frequent operation requirements.

Vacuum load switch-fuse combination with fuse (hereinafter referred to as combination appliance) FZRN25A-12(D)/T200-31.5 can break the short-circuit current for short-circuit protection. The product has a mechanism tripping, equipped with a fuse with an impactor, when passing the overload current or short-circuit current, the fuse is blown, and the impactor hits the tripping device to make the load switch automatically open to avoid phase loss operation.

Key Features

• High - efficiency Arc Extinction and Breaking Capacity：Leveraging the high insulation strength and rapid arc - extinction characteristics of the vacuum interrupter, it can quickly extinguish the arc and reliably break load currents, overload currents, and even short - circuit currents under certain conditions. This significantly reduces the ablation of the contacts by the arc and extends the electrical service life of the equipment. For example, in a frequently operated power distribution system, it can stably perform circuit switching operations, reducing the probability of failures.
• High Insulation Performance：The vacuum environment itself has extremely high insulation performance. Coupled with a reasonable insulation structure design, the indoor AC high - voltage vacuum load break switch can operate reliably in high - voltage environments, effectively preventing phase - to - phase and phase - to - ground short circuits and ensuring the safety and stability of the power system.
• Fast Switching:Equipped with an advanced operating mechanism, it can achieve fast switching operations with short switching times. It can quickly isolate faulty circuits, reducing the impact of faults on the system. For instance, in the event of a short - circuit fault, it can rapidly cut off the circuit, limit the duration of the short - circuit current, and reduce the risk of equipment damage.

Technical Parameters

 Operating Environmental Conditions

• Ambient Air Temperature: Maximum +40°C, Minimum -10°C
• Altitude: Not exceeding 1000m
• Relative Humidity: Daily average not greater than 95%, Monthly average not greater than 90%
• Seismic Intensity: Less than Grade 8
• Ambient Air Shall Be Free from Pollution by Corrosive, Flammable Gases, Water Vapor and Other Harmful Gases