Compact Type 1+2 AC Surge Protection for 3P+N Systems
LY1-C40M/3(S)+1 is a compact pluggable Type 1+2 AC surge protective device for three-phase plus neutral systems. It provides coordinated L-N and N-PE surge protection, helping limit lightning impulses and transient overvoltage while reducing the DIN-rail space required inside distribution and control panels.
Compact 3P+N configuration for three-phase four-wire systems
7kA L-N and 25kA N-PE impulse discharge capability
20kA nominal and 40kA maximum discharge current
Pluggable modules with visual indication and optional remote contact
Suitable Applications
LY1-C40M/3(S)+1 is suitable for compact three-phase plus neutral AC systems requiring coordinated Type 1+2 surge protection between L-N and N-PE.
Distribution Boards
For incoming surge protection in compact three-phase plus neutral distribution panels.
Industrial Control Panels
Suitable for machinery controls, automation cabinets, HVAC systems, and industrial equipment.
Commercial Buildings
Helps protect three-phase building power systems against switching surges and lightning-induced overvoltage.
Solar AC Output Panels
For three-phase solar inverter AC output panels when the selected voltage version matches the installation.
FAQ
Common questions about LY1-C40M/3(S)+1 compact 3P+N pluggable Type 1+2 AC surge protective device selection.
What is LY1-C40M/3(S)+1 used for?
It is used for compact Type 1+2 surge protection in three-phase plus neutral AC 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 conductors plus neutral, with L-N protection paths and a coordinated N-PE protection path.
What surge ratings does this SPD provide?
It provides 20kA nominal discharge current and 40kA maximum discharge current. Its impulse discharge current is 7kA on the L-N paths and 25kA on the N-PE path.
What voltage options are available?
Available L-N maximum continuous operating voltage options are 75V, 150V, 275V, and 320V AC. The N-PE continuous operating voltage is 255V.
What is the benefit of the compact pluggable design?
The compact structure reduces DIN-rail space, while the pluggable cartridges simplify inspection and replacement without removing the complete wired base.
What should be confirmed before ordering?
Confirm the L-N system voltage, 3P+N circuit arrangement, N-PE protection requirement, 63A maximum backup fuse, conductor size, DIN-rail space, and remote-contact requirement.
