Compact Type 2+3 AC Surge Protection for 3P+N Systems
LY1-D20/3(S)+1 is a compact 3P+N pluggable Type 2+3 AC surge protective device for three-phase plus neutral systems. Its coordinated MOV and GDT structure provides L-N and N-PE protection with 10kA nominal discharge current and 20kA maximum discharge current for downstream and final-distribution applications.
Protection Classe II+III / Type 2+3 pour circuits AC en aval
3P+N configuration with L-N and N-PE protection
Coordinated MOV and GDT surge-protection technology
Modules plugables avec indication visuelle et contact à distance en option
Applications appropriées
LY1-D20/3(S)+1 is suitable for three-phase plus neutral systems requiring coordinated Type 2+3 surge protection close to downstream equipment and final distribution circuits.
Tableaux de sous-distribution
For downstream protection in commercial and industrial three-phase plus neutral distribution boards.
Panneaux de Contrôle Industriels
Suitable for machinery controls, automation cabinets, HVAC panels, and production equipment.
Commercial Facilities
Helps protect office buildings, retail systems, building controls, and sensitive commercial loads.
Panneaux CA d'onduleurs solaires
For three-phase solar inverter AC-side panels when the selected Uc rating matches the system voltage.
FAQ
Common questions about LY1-D20/3(S)+1 compact 3P+N pluggable Type 2+3 AC surge protective device selection.
What is LY1-D20/3(S)+1 used for?
LY1-D20/3(S)+1 is used for downstream and final-distribution surge protection in three-phase plus neutral AC systems. It helps limit transient overvoltage through coordinated L-N and N-PE protection paths.
Que signifie 3P+N ?
3P+N signifie que le SPD est conçu pour trois conducteurs de phase plus le neutre, avec une protection MOV sur les chemins L-N et un chemin de protection GDT entre N-PE.
Is LY1-D20/3(S)+1 a Type 2 or Type 3 SPD?
LY1-D20/3(S)+1 is classified as Class II+III / Type 2+3, making it suitable for coordinated downstream and final-distribution surge protection.
What protection technology does it use?
Il associe une protection MOV à haute énergie sur les chemins L-N et un GDT sur le chemin N-PE, offrant une protection coordonnée contre les surtensions pour les systèmes triphasés avec neutre.
Quelles sont les valeurs de courant de décharge qu'il fournit ?
It provides 10kA nominal discharge current and 20kA maximum discharge current on both the L-N and N-PE protection paths.
Que doit-on confirmer avant de commander ?
Confirm the nominal L-N voltage, required Uc and Up level, 3P+N wiring arrangement, 125A maximum backup-fuse coordination, conductor size, DIN-rail space, and optional remote-contact requirement.
