Introduction A solution for protecting electrical and electronic systems (such as cameras, computers, and PLCs) from high-voltage surges and transient overvoltages caused by lightning strikes or sudden voltage spikes. The device operates by diverting excessive surge current safely to ground, helping protect equipment, prevent fire hazards, and improve system safety.

Device Classification:

• Type 1: Installed at the main distribution board to withstand direct lightning surge currents.
• Type 2: Installed at sub-distribution panels to protect equipment from transient surges and residual lightning effects.
• Type 3: Installed close to sensitive equipment (electronics, telecommunications devices, etc.) to suppress remaining low-level surge voltages.

Description

• Compact, robust, and aesthetically designed with a plug-in modular structure, compliant with IEC 61643-11 standard.
• Made of high-quality engineering plastic, offering excellent durability, heat resistance, and flame-retardant performance.
• Front status indicator window for easy monitoring (green: normal operation – red: replacement required).
• Helps suppress and limit transient overvoltage surges caused by lightning strikes or electrical switching operations.
• Provides reliable protection for control devices, electrical panels, machinery, and residential or industrial electrical systems.
• Quick DIN rail installation inside electrical panels, allowing easy maintenance and module replacement.

Technical Specifications

• Model: SPD-20-A280
• Type: Type 2
• Poles:
  • 2P (L/N): for single-phase system
  • 4P (L1/L2/L3/N): for three-phase system
• Max. Continuous Operating Voltage (Uc): 280V AC
• Nominal Discharge Current (In): 20kA
• Maximum Discharge Current (Imax): 40kA
• Protection Voltage Level (Up): ≤ 1.3kV
• Frequency: 50/60Hz
• Protection Degree: IP20
• Back-up fuse: 63A ~ 100A

Applications:

• Protection for sensitive electronic equipment.
• Residential electrical panels and distribution boards (DB).
• Industrial control panels.
• Electrical systems in factories, offices, and commercial buildings

Struture:

• Surge Protection Module (SPD Module):
  Designed to absorb transient surge voltages caused by lightning or switching operations.
  Featuring a pluggable and replaceable design, the module can be quickly replaced at the end of its service life without disconnecting wiring from the base.
• Plug-in Base (SPD Base):
  Mounted directly onto a DIN rail inside the electrical panel, providing secure mechanical support and electrical connection for the SPD module.
  The base includes wiring terminals for 2P (L/N) or 4P (L1, L2, L3, N) configurations, along with a PE grounding terminal located at the bottom.
• Advantages:
  Quick replacement of damaged or end-of-life SPD modules without removing wiring inside the electrical panel.
  Reduced maintenance time and easier servicing.
  Wiring terminals available for L, N (2P) or L1, L2, L3, N (4P) connections.


Circuit diagram:



Wiring diagram:



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Dimensions



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Technical document

• Surege Protector iLEC SPD-20-A280