High-Energy Type 1+2 AC Surge Protection for Main Distribution Boards
LY1-B25/2(S) is a monoblock 2-pole Type 1+2 AC surge protective device designed for main distribution boards and low-voltage AC power systems. With 25kA impulse discharge current, 100kA maximum discharge current, and 50kA total discharge current, it helps protect incoming power circuits from lightning surges and transient overvoltage.
Class I+II / Type 1+2 AC SPD for main distribution board protection
25kA Iimp, 25kA In, 100kA Imax, and 50kA Itotal surge rating
2-pole monoblock design for compact AC surge protection installation
Suitable for TN-S network systems and L-PE / N-PE protection modes
Suitable Applications
LY1-B25/2(S) is suitable for AC power systems where high-energy Type 1+2 surge protection is required at the incoming power side or main distribution level.
Main Distribution Boards
For incoming AC power protection in main distribution boards and low-voltage panels.
Bâtiments commerciaux
Helps protect building power distribution systems from lightning-induced surges.
Industrial Power Panels
Suitable for industrial low-voltage panels requiring high-energy surge protection.
Solar AC Side Panels
Can be used on the AC side of solar systems when voltage and protection mode match the design.
FAQ
Common questions about LY1-B25/2(S) 2-pole monoblock AC surge protective device selection and application.
What is LY1-B25/2(S) used for?
LY1-B25/2(S) is used for AC surge protection at the main distribution board or incoming power side. It helps limit lightning surges and transient overvoltage in low-voltage AC systems.
What is the difference between LY1-B25/1(S) and LY1-B25/2(S)?
LY1-B25/1(S) is a single-pole version, while LY1-B25/2(S) is a 2-pole monoblock SPD. The 2-pole version is suitable for applications requiring two-pole protection and includes a total discharge current rating of 50kA.
What surge ratings does this SPD provide?
LY1-B25/2(S) provides 25kA impulse discharge current Iimp, 25kA nominal discharge current In, 100kA maximum discharge current Imax, and 50kA total discharge current Itotal.
Which network system is this model suitable for?
This model is suitable for TN-S network systems when the protection mode, voltage rating, and system design match the application requirements.
Does this model support remote signalling?
Yes. The “S” version can include optional remote contact for SPD status monitoring. Please confirm this requirement before ordering.
What should be confirmed before ordering?
Please confirm system voltage, network system, protection mode, backup fuse, installation space, wiring cross-section, and remote signalling requirement before ordering.
