Защита LED-фасада от перенапряжений: координация AC, 24V DC и DMX

Инженерное руководство по интерфейсам, нагрузкам и границам защиты.

Три уровня защиты

Map AC supply, 24V DC branches and DMX signalling as separate conductive interfaces. IEC treats AC and signalling SPDs in distinct application standards [S2][S4].

Пример с 24 светильниками

Illustrative case: 24 fixtures × 36W = 864W. Eight fixtures per 24V group equal 288W and an ideal 12A load. Audit 11 conductive interfaces; this is an interface count, not a device prescription.

Порядок координации

1. Draw protection boundaries and cable routes.
2. Obtain equipment surge-withstand data.
3. Select interface-compatible protection.
4. Verify short direct connections, bonding and maintenance.

FAQ

A cabinet SPD does not automatically prove remote fixtures are protected. Final device ratings, quantities and locations are 待确认.

Источники

1. IEC 62305-4
2. IEC 61643-11
3. IEC 61643-21
4. LIKELIGHT product reference

Author: LikeLight Tom, Operations. Technical reviewer: 待确认. Evidence reviewed August 23, 2026.