HV load switch: environmental requirements and applications

2025-05-12 11:26:06

High voltage Load switches are key control equipment for power distribution systems of 12kV and below, requiring strict matching of environmental conditions and precise selection. This article analyzes its operational requirements and typical application scenarios to help you optimize power system design.

Environmental condition requirements

Altitude limit: ≤ 2000 meters (exceeding the limit requires reduced capacity for use)

Temperature range: -25 ℃~+40 ℃ (cold/heat resistant models should be selected for extreme climates)

Humidity control: Daily average ≤ 95%, monthly average ≤ 90% (IP65 protection level selected for humid areas)

Non polluting environment: Prohibit conductive dust and corrosive gases (explosion-proof design is required in chemical areas)

Safe place: Keep away from sources of fire, explosives, and severe vibrations

Core application scenarios

Urban and rural power grid Terminals

Control 10kV distribution transformer (such as S11-500kVA)

Box type substation incoming and outgoing line protection (suitable for European/American type box type substations)

Loop power supply system

Dual power switching unit (such as HXGN17 ring main unit)

Main control switch of cable branch box (with fuse combination)

industrial power distribution

Factory distribution room busbar segmentation (FN16 series load switch)

Mining explosion-proof type (Ex d IIC certification)

New energy access

Photovoltaic substation transformer protection (12kV/1250A specification)