Acti 9 is Schneider Electric’s modular final distribution system within the 9 Series, designed to deliver the last level of protection in low‑voltage electrical installations for homes, commercial buildings, and light industrial environments. It is positioned specifically at the final distribution level, downstream of the main and sub‑distribution switchgear.

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What “Final Distribution” means in Acti 9

Final distribution refers to the outgoing circuits that directly feed loads, such as:

• Lighting circuits
• Socket outlets
• HVAC terminal units
• Small motors
• IT and critical power outlets

Acti 9 provides protection, control, indication, and optional monitoring at this level, fully assembled on DIN‑rail modular devices and distribution boards.

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Core Acti 9 final distribution devices

1. Miniature Circuit Breakers (MCB)

• Acti9 iC60 range
• Used for overcurrent and short‑circuit protection of final circuits
• Nominal current: 1–63 A
• Fully compliant with IEC/EN 60898‑1 and IEC/EN 60947‑2(industrial isolation capability)

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2. Residual Current Protection

Provides protection against earth leakage and indirect contact.

• iID RCCB – residual current circuit breakers up to 100 A
• Vigi iC60 – add‑on residual current modules for iC60 MCBs
• iC60 RCBO / iDPN Vigi – combined overcurrent + earth‑leakage protection in one device

These cover final circuit compliance with IEC 61008‑1 and IEC 61009‑1 requirements.

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3. Arc Fault Detection (AFDD)

• Acti9 iARC AFDD
• Detects dangerous series and parallel arc faults
• Used where enhanced fire protection is required, especially in commercial and critical buildings
• Part of the Acti9 Active Safety System concept for final distribution

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4. Surge Protection Devices (SPD)

• Acti9 iPRD / iPRI / iPRC
• Type 2, Type 3, or combined Type 2+3
• Installed at final distribution boards to protect equipment against transient overvoltage events

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Acti 9 Distribution Boards (Final Distribution Boards)

Acti 9 is commonly installed in Isobar P, Easy9, and Acti 9 distribution boards, purpose‑designed for final circuits. Features documented for the Acti 9 final distribution board systems include:

• IP2X / finger‑safe internal protection
• Class II front face devices
• Encapsulated busbar systems
• Plug‑on RCBO technology (PoN) on selected boards
• Outgoing way isolation capability
• Compliance with IEC/BS EN 61439‑3 for assemblies

Boards are available in:

• Single‑phase (SPN)
• Three‑phase (TPN)
• Surface or flush mounting

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Connectivity & Smart Final Distribution (Acti 9 Smart)

Acti 9 can extend beyond pure protection into monitoring and control:

• Acti 9 Smartlink communication system
• Uses Modbus protocol
• Enables:
  • Circuit‑level energy monitoring
  • Load control
  • Integration with facility management systems

This turns a conventional final distribution board into a connected distribution panel, supporting energy efficiency strategies.

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Key advantages of Acti 9 for final distribution

• Safety: VisiSafe™ isolation, Class II insulation, AFDD options
• Continuity of supply: VisiTrip™ fault identification and selective coordination
• Simplicity: Modular DIN‑rail system, unified accessories
• Scalability: From residential DBs to large commercial floor panels
• Compliance: Fully aligned with IEC and BS standards for final circuits

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Where Acti 9 fits in the overall LV architecture

 Transformer / Generator      
↓ 
Main LV Switchboard (ACB/MCCB)         
↓ 
Sub‑distribution (MCCB)         
↓
👉 Acti 9 Final Distribution         
↓ 
Lighting / Power / HVAC / IT Loads 

Acti 9 represents the last protective layer before end‑use equipment.