Coordinated Type 2 AC Surge Protection for 3P+N Systems
LY1-C40/3(S)+1 is a pluggable 3P+N Type 2 AC surge protective device designed for three-phase plus neutral distribution systems. Coordinated MOV and GDT protection paths help limit transient overvoltage between L-N and N-PE while providing fast response and reliable protection for multi-pole AC circuits.
3P+N Type 2 AC SPD for three-phase distribution boards
20kA nominal and 40kA maximum discharge current
MOV protection for L-N and GDT protection for N-PE coordination
Replaceable pluggable modules with optional remote status contact
Suitable Applications
LY1-C40/3(S)+1 is suitable for three-phase plus neutral AC systems requiring coordinated Type 2 surge protection at the sub-distribution or equipment-panel level.
Distribution Boards
For coordinated L-N and N-PE protection in three-phase plus neutral distribution boards.
Industrial Control Panels
Suitable for industrial control cabinets, machinery panels, HVAC systems, and automation equipment.
Commercial Buildings
Helps protect three-phase building power systems from switching surges and lightning-induced overvoltage.
Solar AC Panels
For the AC side of solar installations when voltage rating and 3P+N protection design match the system.
FAQ
Common questions about LY1-C40/3(S)+1 pluggable 3P+N Type 2 AC surge protective device selection.
What is LY1-C40/3(S)+1 used for?
It is used for Type 2 surge protection in three-phase plus neutral AC distribution systems, with coordinated protection between L-N and N-PE.
What does 3P+N mean?
3P+N means the SPD is designed for three-phase plus neutral systems, with L-N protection across the phases and coordinated N-PE protection.
Why does this model use MOV and GDT protection?
MOV elements provide fast voltage clamping on the L-N paths, while the GDT supports coordinated discharge on the N-PE path with low leakage during normal operation.
What discharge current ratings does it provide?
The SPD provides 20kA nominal discharge current In and 40kA maximum discharge current Imax for both L-N and N-PE protection paths.
What voltage options are available?
L-N maximum continuous operating voltage options include 75V, 150V, 275V, 320V, 385V, and 440V AC. The N-PE continuous operating voltage is 255V.
What should be confirmed before ordering?
Confirm the system voltage, 3P+N arrangement, L-N and N-PE protection mode, backup fuse, wiring cross-section, DIN-rail space, and remote contact requirement.
