Protection des façades LED contre les surtensions : coordonner AC, 24V DC et DMX

Guide technique pour cartographier les interfaces, charges et limites de protection.

Trois niveaux de protection

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].

Exemple de 24 luminaires

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.

Méthode de coordination

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.

Sources

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.