Working principle of distribution cabinet

　　Distribution cabinet is an important equipment used for energy distribution and control in the power system. Its main function is to distribute electrical energy from the power supply to various electrical equipment, and to protect and control the circuit. The following is the working principle of the distribution cabinet:

　　1. Electric energy input

　　Input power supply: Distribution cabinets usually receive high voltage electricity from transformers or other power sources, and the power supply is connected to the input end of the distribution cabinet through incoming cables.

　　Current conversion: According to the system design, the input high voltage electricity will be reduced to suitable low voltage electricity through a transformer.

　　2. Electricity allocation

　　Distribution busbar: The input electrical energy is distributed to various branch circuits through the distribution busbar (busbar is a conductor, which can be a metal rod or copper aluminum conductor).

　　Branch circuit: Each branch circuit is connected to different electrical equipment, and the distribution cabinet controls the switch status of these branches through switches (such as circuit breakers or fuses).

　　3. Circuit protection

　　Protection device: The distribution cabinet is equipped with various protection devices, such as circuit breakers, overload protectors, leakage protectors, etc. These devices monitor the current situation in the circuit and automatically cut off the power to prevent faults such as overload, short circuit, and leakage.

　　Fault indication: If a fault occurs, the indicator light of the distribution cabinet will light up to remind the operator to perform inspection and maintenance.

　　4. Control function

　　Control switch: Operators can manually control the on/off of the circuit through the control switch or button on the distribution cabinet, achieving switch control of electrical equipment.

　　Automation control: Modern distribution cabinets can integrate automation control systems, support remote monitoring and control, and improve electricity efficiency and management level.

　　5. Monitoring and alarm

　　Monitoring system: The distribution cabinet is usually equipped with measuring instruments such as ammeters, voltmeters, and power meters to monitor the real-time operation status of the circuit.

　　Alarm system: When abnormal conditions (such as overload, short circuit, etc.) are detected, the distribution cabinet will issue an alarm through the alarm device to remind the operator to take measures.

　　6. Electric energy output

　　Power output: The electrical energy processed by the distribution cabinet will be output to various electrical devices such as motors, lighting fixtures, air conditioners, etc. through outgoing cables, achieving effective distribution of electrical energy.

　　Load balancing: When designing a distribution cabinet, load balancing needs to be considered to ensure that the electrical load of each branch is distributed reasonably and avoid overloading of one branch.

　　Summary

　　The working principle of a distribution cabinet mainly includes the input, distribution, protection, control, monitoring, and output of electrical energy. Through reasonable design and configuration, distribution cabinets can effectively ensure the safe, stable, and efficient operation of the power system, and are essential equipment for power distribution and control.