Type 1+2 Surge Protection for 1000V DC Solar PV Systems
LY1-C40PV/3(S) 1000V (D4) is a three-pole pluggable Type 1+2 DC surge protective device for photovoltaic combiner boxes, inverter DC inputs, and high-voltage DC distribution systems. Its high-energy MOV modules provide coordinated protection with 20kA nominal discharge current, 40kA maximum discharge current, and 6.25kA impulse-current capability.
Class I+II / Type 1+2 protection for 1000V DC systems
Three-pole D4 configuration for photovoltaic DC circuits
20kA In, 40kA Imax, and 6.25kA Iimp ratings
Replaceable cartridges with visual indication and optional remote signaling
Suitable Applications
LY1-C40PV/3(S) 1000V (D4) is intended for photovoltaic and high-voltage DC systems requiring Type 1+2 surge protection and a three-module D4 configuration.
PV Combiner Boxes
Provides surge protection for 1000V DC photovoltaic strings and combiner-box circuits.
PV Inverter DC Inputs
Suitable for protecting the DC input side of string, hybrid, and central solar inverters.
DC Distribution Cabinets
For high-voltage DC distribution boards, switching panels, and photovoltaic equipment cabinets.
Energy Storage DC Systems
Suitable for compatible battery charging cabinets and DC energy-storage circuits up to 1000V DC.
FAQ
Common questions about LY1-C40PV/3(S) 1000V (D4) three-pole pluggable Type 1+2 DC surge protective device selection.
What is LY1-C40PV/3(S) 1000V (D4) used for?
It is designed to protect 1000V DC photovoltaic and DC power systems against lightning-induced surges and switching transient overvoltage. Typical installation locations include PV combiner boxes, inverter DC inputs, and DC distribution cabinets.
Is this a Type 1+2 DC SPD?
Yes. It is classified as Class I+II / Type 1+2 and includes both 8/20μs discharge-current ratings and a 10/350μs impulse-current rating.
What does the D4 configuration mean?
D4 identifies the product’s specific three-module internal and wiring configuration. The installation arrangement should follow the product wiring diagram supplied with the unit.
What discharge current ratings does it provide?
It provides 20kA nominal discharge current In, 40kA maximum discharge current Imax, and 6.25kA impulse discharge current Iimp.
Can the protection modules be replaced separately?
Yes. The pluggable design allows individual protection modules to be inspected or replaced without removing the permanently wired base.
What should be confirmed before ordering?
Confirm the maximum PV system voltage, D4 wiring configuration, grounding arrangement, required voltage protection level, backup-fuse coordination, conductor size, installation location, and optional remote-contact requirement.
