Pluggable Type 1+2 AC Surge Protection for Multi-Pole Distribution Panels
LY1-12.5/3(S) is a pluggable multi-pole Type 1+2 AC surge protective device designed for low-voltage distribution systems. With multiple voltage options from 75V to 440V AC, 10kA / 20kA nominal discharge current, 50kA maximum discharge current, and 10kA / 12.5kA impulse discharge current, it helps protect AC power circuits from lightning surges and transient overvoltage.
Multi-pole Type 1+2 AC SPD for low-voltage distribution protection
75V to 440V AC versions for different system voltage requirements
10kA / 20kA In, 50kA Imax, and 10kA / 12.5kA Iimp surge ratings
Pluggable module design with optional remote contact for status monitoring
Suitable Applications
LY1-12.5/3(S) is suitable for low-voltage AC systems where multi-pole Type 1+2 surge protection is required in distribution boards, control cabinets, equipment panels, and building power systems.
Distribution Boards
For incoming AC surge protection in low-voltage distribution boards and power panels.
Commercial Buildings
Helps protect commercial electrical systems from switching surges and lightning-induced overvoltage.
Control Cabinets
For control panels and equipment cabinets requiring compact pluggable SPD protection.
Solar AC Side Panels
Can be used on the AC side of solar systems when voltage rating and protection design match the system requirements.
FAQ
Common questions about LY1-12.5/3(S) pluggable multi-pole Type 1+2 AC surge protective device selection and application.
What is LY1-12.5/3(S) used for?
LY1-12.5/3(S) is used for multi-pole AC surge protection in low-voltage distribution systems. It helps limit transient overvoltage caused by lightning surges or switching events.
What does Type 1+2 mean?
Type 1+2 means the SPD is designed to handle impulse current from lightning surge events and also provide downstream surge limitation for AC distribution systems.
What voltage options are available?
Available maximum continuous operating voltage options include 75V, 150V, 275V, 320V, 385V, and 440V AC. Please select the voltage according to the system design.
What surge ratings does this SPD provide?
This model provides 10kA or 20kA nominal discharge current In, 50kA maximum discharge current Imax, and 10kA or 12.5kA impulse discharge current Iimp depending on voltage rating.
What is the benefit of the pluggable design?
The pluggable module design allows easier inspection and replacement during maintenance, helping reduce wiring work and service time.
What should be confirmed before ordering?
Please confirm voltage rating, pole configuration, backup fuse, DIN-rail space, wiring cross-section, and remote contact requirement before ordering.
