Pluggable Type 1+2 AC Surge Protection for 3P+N Systems
LY1-12.5/3(S)+1 is a 3P+N pluggable Type 1+2 AC surge protective device designed for low-voltage distribution systems. It combines high-energy MOV and GDT protection elements for L-N and N-PE protection, helping limit lightning surges and transient overvoltage in three-phase plus neutral AC power circuits.
3P+N Type 1+2 AC SPD for main distribution board protection
L-N and N-PE protection modes with MOV + GDT hybrid design
12.5kA / 50kA Iimp and 20kA / 50kA In surge ratings
Pluggable module design with optional remote contact for status monitoring
Suitable Applications
LY1-12.5/3(S)+1 is suitable for low-voltage 3P+N AC systems where Type 1+2 surge protection is required at the incoming power side or distribution panel level.
Main Distribution Boards
For incoming surge protection in three-phase plus neutral AC distribution boards.
Edificios comerciales
Helps protect commercial electrical systems from lightning-induced surges and switching overvoltage.
Industrial Power Panels
For low-voltage power panels and equipment cabinets requiring 3P+N surge protection.
Solar AC Side Panels
Can be used on the AC side of solar systems when voltage rating and protection mode match the design.
PREGUNTAS FRECUENTES
Common questions about LY1-12.5/3(S)+1 3P+N pluggable Type 1+2 AC surge protective device selection and application.
What is LY1-12.5/3(S)+1 used for?
LY1-12.5/3(S)+1 is used for 3P+N AC surge protection in low-voltage distribution systems. It helps limit transient overvoltage in L-N and N-PE protection paths.
What does 3P+N mean?
3P+N means the SPD is designed for three-phase plus neutral systems, with protection paths between L-N and N-PE.
What is the role of MOV and GDT?
The MOV helps clamp transient overvoltage quickly, while the GDT supports high-energy discharge, especially in the N-PE protection path.
What surge ratings does this SPD provide?
This model provides 12.5kA / 50kA impulse discharge current Iimp, 20kA / 50kA nominal discharge current In, and 50kA / 100kA maximum discharge current Imax for L-N / N-PE protection paths.
What voltage options are available?
Available L-N maximum continuous operating voltage options include 75V, 150V, 275V, and 320V AC. The N-PE continuous operating voltage is 255V.
What should be confirmed before ordering?
Please confirm voltage rating, 3P+N system design, L-N / N-PE protection mode, backup fuse, DIN-rail space, wiring cross-section, and remote contact requirement before ordering.
