An SFU (Switch Fuse Unit) panel is an electrical distribution board that combines a manual switch and a fuse in one unit to provide both control and protection against overloads and short circuits. Primarily used for low-voltage (up to 1000V AC) industrial and commercial applications, it ensures safe power isolation and reliable circuit breaking.
Key Aspects of SFU Panels:
- Dual Functionality: Serves as a manual isolator (switching) and an automatic protector (fusing) for electrical circuits.
- Protection mechanism: Contains fuses that melt and break the circuit when high current occurs.
- Applications: Commonly used in industrial, commercial, and residential applications for protection of motors, transformers, and distribution lines.
- Components: Often includes a padlockable handle for safety, a switch mechanism, and replaceable fuse links.
- Context: Unlike modern MCBs, SFUs are designed for high fault capacity and manual, heavy-duty operation
