Why Choose the ABB EPH-S66209-AF Protecta Home AFDD Consumer Unit?
The ABB EPH-S66209-AF is a 9-way, 63 A AFDD-compatible split-load consumer unit from the ABB Protecta Home range, designed for residential and light commercial electrical distribution. Featuring a 63 A main switch isolator and two 63 A residual current circuit breakers (RCCBs), this consumer unit combines central supply isolation with two separately protected residual current circuit groups.
Designed specifically for installations incorporating arc fault detection devices (AFDDs), the EPH-S66209-AF provides 9 outgoing circuit ways and 18 modular positions. Its AFDD-compatible layout accommodates the additional modular space required by suitable protective devices, making it a practical solution for electrical installations where arc fault protection forms part of the circuit design.
Housed in a robust steel enclosure measuring 250 × 490 × 105 mm, the ABB EPH-S66209-AF combines a compact single-row arrangement with flexible circuit distribution. Its two 63 A RCCBs, 63 A main switch and AFDD-ready configuration make it suitable for professionally designed electrical installations using compatible ABB circuit protection equipment.
Key Advantages
- 9-way AFDD-compatible consumer unit designed for modern electrical distribution installations.
- 18 modular positions accommodate compatible arc fault detection and circuit protection devices.
- 63 A main switch isolator provides central supply isolation.
- Two 63 A RCCBs provide separate residual current protection groups.
- AFDD-ready configuration supports installations requiring arc fault detection protection.
- Variable split-load arrangement allows flexible allocation of outgoing circuits.
- Part of the established ABB Protecta Home electrical distribution range.
- Steel enclosure construction provides a durable housing for modular protection equipment.
- 250 × 490 × 105 mm nominal dimensions support practical installation planning.
- Two RCCB groups help organise outgoing circuits and limit the extent of certain residual current interruptions.
- Compatible with appropriately selected ABB AFDD and modular circuit protection equipment.
- Suitable for residential installations, consumer unit replacement and electrical refurbishment projects.
Key Features
- ABB Protecta Home consumer unit series.
- EPH-S66209-AF AFDD-compatible split-load consumer unit.
- 9 outgoing circuit ways.
- 18 modular positions.
- 63 A main switch disconnector / isolator.
- 2 × 63 A residual current circuit breakers.
- Two RCCB-protected circuit groups.
- AFDD-compatible distribution arrangement.
- Variable split-load configuration.
- Durable steel enclosure construction.
- Single-row electrical distribution format.
- Central isolation through the main switch.
- Supports compatible AFDDs and associated outgoing circuit protection devices.
- Designed for professional electrical installation and maintenance.
- Nominal height: 250 mm.
- Nominal width: 490 mm.
- Nominal depth: 105 mm.
- ABB manufacturer order code 1TVC151800S3086.
AFDD-Compatible Electrical Distribution with Dual 63 A RCCBs
The ABB EPH-S66209-AF is designed for electrical installations requiring the flexibility to incorporate arc fault detection devices alongside conventional circuit protection equipment. AFDDs are designed to detect characteristic electrical arcing conditions that may present a fire risk and disconnect the affected circuit when their specified operating criteria are met.
Unlike a conventional consumer unit designed primarily around single-module miniature circuit breakers, the EPH-S66209-AF provides 18 modular positions for 9 outgoing ways. This arrangement allows additional space for compatible AFDD-based protection devices, helping electricians plan circuits where arc fault detection is required or specified.
The consumer unit includes a 63 A main switch isolator, providing a central means of disconnecting the incoming supply. Downstream of the main switch, two 63 A RCCBs establish separate residual current protection groups. These groups allow outgoing circuits to be distributed according to the approved split-load arrangement.
The two RCCBs provide residual current protection for their respective circuit groups. Their 63 A ratings describe current-carrying capacity rather than residual current operating sensitivity. The actual residual current trip characteristics must be confirmed from the installed device specifications.
Importantly, RCCBs, MCBs and AFDDs perform different protective functions. RCCBs detect residual current imbalance, MCBs provide overcurrent protection, and AFDDs detect specified arcing faults. The protective functions available on an individual outgoing circuit depend on the exact combination or integrated type of protective devices selected.
The AF designation identifies the consumer unit's AFDD-compatible configuration; it does not establish that separate AFDD protective devices are included. Suitable AFDDs and other outgoing circuit protection devices should be selected according to ABB compatibility guidance and the electrical installation design.
The variable split-load arrangement allows circuit allocation between the two RCCB groups, subject to the approved busbar and device configuration. This can support improved organisation of electrical circuits, although a residual current fault on one circuit may still disconnect other circuits connected to the same RCCB.
With its steel enclosure and nominal dimensions of 250 × 490 × 105 mm, the EPH-S66209-AF provides a practical platform for indoor electrical distribution. Final device selection, circuit grouping, conductor sizing and installation methods must follow ABB instructions and applicable electrical installation regulations, including relevant BS 7671 requirements.
Typical Applications
- Residential consumer unit installations incorporating AFDD protection.
- Domestic electrical distribution boards requiring 9 outgoing circuit ways.
- Electrical installations requiring a 63 A main switch isolator.
- Split-load distribution boards with two 63 A RCCBs.
- Electrical installations where arc fault protection is specified.
- Lighting and socket outlet circuits using compatible protective devices.
- Consumer unit replacement and electrical refurbishment projects.
- Residential properties requiring additional circuit protection functionality.
- Light commercial electrical distribution installations.
- Professional electrical contracting and building services projects.
