Here's a structured breakdown: ### **Key Components and Functions:** 1. **Power Supply (240V AC):** - Derived from the 11kV incoming panel, filtered through fuses (F101, F102) for branch protection. **Alarm Circuit:** - **Hooter (Alarm Buzzer):** Activated. A distribution board (also known as panelboard, circuit breaker panel, breaker panel, circuit breaker, electric panel, fuse box or DB box) is a component of an electricity supply system that divides an electrical power feed into subsidiary circuits while providing a protective fuse or circuit. Intelligent power distribution box is composed of traditional leakage protector, air switch, AC contactor and KC868-H8. Compared with the traditional power distribution box, it is safer to cut off the strong power supply remotely, and it can save energy through the timing mode while controlling. The circuit diagram represents an **alarm and protection system** for an **11kV incoming panel**, designed to monitor and respond to faults in an electrical distribution network. Actual wiring diagrams and pictures are provided for real DSC products. This guide assumes that all of the components will work together. A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge protective devices.