How does a power distribution box work

1. Receiving electric energy: The fiber distribution boxes is connected to the power station or substation through cables and receives high-voltage electric energy. These cables are usually made of copper or aluminum and have good electrical conductivity properties.

2. Voltage reduction: For safety reasons, the box needs to convert high-voltage electrical energy into low-voltage electrical energy. This process is accomplished through a transformer. A transformer is an electrical device that converts voltage from one level to another without changing the magnitude of the current. In a box, a transformer usually has two windings: a high-voltage winding and a low-voltage winding. When high-voltage electrical energy is input to the high-voltage winding, the transformer produces a low-voltage output proportional to the input voltage.

3. Distribute electric energy: The reduced low-voltage electric energy needs to be distributed to various electrical equipment. Circuit breakers and contactors in the box perform this function. A circuit breaker is an electrical switch that automatically cuts off a circuit to prevent overloads and short circuits. A contactor is an electromagnetic switch that can control the on and off of a circuit. When a circuit breaker detects excessive current, it quickly cuts off the circuit to protect electrical equipment from damage. The contactor can open or close the circuit as needed to control electrical energy.