Products
Products
Installation & Application（安装应用） 
Installation Precautions
Wiring Connection
Connect according to the installation diagram: + (positive pole), – (negative pole), and PE (grounding wire).
Grounding Requirement
A reliable PE ground connection is mandatory for proper operation of the surge protective device (SPD).
Fault Indication
If the module status window turns red, the SPD has failed and must be replaced immediately.
Lightning Protection Grounding
Grounding must comply with lightning protection standards:
Use shortest possible grounding wires.
Ground resistance must be<4Ω.
Product Dimension Drawing
Product Installation Diagram
Remote Signal (Dry Contact) Wiring Diagram
Product Schematic Diagram
Technical Parameters（技术参数） Rated voltage (Uₙ): 1200V DC
Maximum continuous operating voltage (U꜀): 1500V DC
Nominal discharge current (Iₙ): 20kA (8/20µs)
Maximum discharge current (Iₘₐₓ): 40kA (8/20µs)
Rated short-circuit current (Iₛ꜀ₚᵥ): 1000A
Voltage protection level (Uₚ): 5.0kV
Remote signaling contacts: 1 NO (Normally Open) + 1 NC (Normally Closed)
Upper wiring (+/-): ≥4mm²
Lower wiring (PE): ≥6mm²
Mounting: 35mm DIN rail (EN 60715 compliant)
Important Notes:
This surge protective device requires regular maintenance (non-maintenance-free product).
Visual status indicator:
Green window: Normal operation
Red window: SPD failure (replace immediately)
Ordering and Model Selection（订货选型） | Product model | Product description |
|---|---|
| NKP40PVDC 1500V-40kA Photovoltaic Surge Protective Devic | Designed for 1600V DC power systems, with a maximum discharge current of 40kA (8/20μs), and standard DIN rail mounting。 |
| NKP40PVDC 1200V-40kA Photovoltaic Surge Protective Devic | Designed for 1200V DC power systems, with a maximum discharge current of 40kA (8/20μs), and standard DIN rail mounting。 |
*Please send the inquiry email containing specific product requirements (such as model, quantity, technical parameters, etc.) to the designated email address salina@kejia.com.
（请将包含具体产品需求（如型号、数量、技术参数等）的询价邮件发送至指定邮箱 salina@kejia.com）
