Final Distribution
For end circuits and branch protection in distribution boards. Typically installed in final distribution panels to provide branch overcurrent protection, residual-current protection, isolation control, and surge/abnormal-voltage defense.
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Key Features
- Mostly modular DIN-rail design for fast installation and easy expansion
- Covers common protection needs: overcurrent, residual current, isolation, surge, and abnormal voltage
- Flexible combinations by circuit count and functions for easy panel integration
- Selectable ratings: current, poles, trip curves, and accessories (model-dependent)
Benefits
- Improved electrical safety by mitigating overcurrent, leakage, and surge risks
- Cleaner layout with standardized branch allocation and control for easier inspection
- More efficient maintenance with quicker fault localization and reduced downtime
Subtypes
- MCB (Miniature Circuit Breaker): overload/short-circuit protection for final branches; compact for multi-circuit boards.
- RCBO (Residual Current Breaker with Overcurrent Protection): combines overcurrent + residual-current protection to save space and simplify wiring.
- RCCB (Residual Current Circuit Breaker): leakage/shock protection (typically without overcurrent protection; used with an MCB).
- IS (Isolator Switch): safe isolation and maintenance disconnection; lockable options available (design-dependent).
- SPD (Surge Protection Device): limits surge overvoltage from lightning/switching to protect downstream equipment.
- OUPA (Over/Under Voltage Protector): monitors abnormal voltage and disconnects/restores automatically (model-dependent) to protect sensitive loads.
- Signal/Control Rail Module: DIN-rail modules for signal acquisition, control circuits, or status outputs.
- Modular Contactor: DIN-rail contactor for remote/automatic control and load switching (e.g., lighting, heating).
- Low Voltage Fuse: fast-acting protection for auxiliary/control circuits or specific branches (selection-dependent).
