EnglishLV Switchgear
LV switchgear comprises electrical distribution assemblies rated up to 1,000 V AC or 1,500 V DC, incorporating circuit breakers, disconnect switches, fuses, contactors, and protective relays within enclosed panels. These assemblies are designed for power distribution, motor control, and circuit protection in low-voltage networks. Construction types include fixed-mounted and draw-out configurations, with form divisions (Form 1 through Form 4) per IEC 61439-1 and -2 defining internal separation degrees. Enclosure protection ratings range from IP20 to IP66 depending on installation environment. Main busbar current ratings typically span from 100 A to 6,300 A. Applications include industrial plants, commercial buildings, data centers, and residential distribution boards. Compliance with IEC 61439 series and GB/T 7251 standards governs type-tested design verification. Routine maintenance covers contact cleaning, thermal imaging inspection, and functional testing of tripping mechanisms.
