The selection of electrical components in the power distribution cabinet is a key link to ensure the normal operation and safety and reliability of the power distribution cabinet. The following are some considerations for the selection of electrical components.
First, electrical components should be selected according to the purpose and load type of the power distribution cabinet. If it is used for industrial production, it may need to withstand larger currents and powers, so it is necessary to select components with higher rated currents and powers. For example, for the motor control circuit, it is necessary to select suitable contactors, thermal relays and other components. The rated current of the contactor should be greater than the rated current of the motor to ensure that the circuit can be reliably connected and disconnected when the motor is started and running. The thermal relay should be set according to the rated current of the motor to cut off the circuit in time when the motor is overloaded to protect the motor.
Secondly, consider the performance parameters of the electrical components. For example, the short-circuit breaking capacity of the circuit breaker, the operating current and operating time of the leakage protector, and the fusing characteristics of the fuse. The short-circuit breaking capacity is an important parameter of the circuit breaker, which determines the ability of the circuit breaker to quickly cut off the circuit when a short-circuit fault occurs. The operating current and operating time of the leakage protector should be selected according to the use environment and protection requirements to ensure that the power supply can be cut off in time to protect personal safety when a leakage fault occurs. The fusing characteristics of the fuse should match the characteristics of the load so that it can quickly fuse and protect the circuit when an overload or short circuit fault occurs.
In addition, the brand and quality of the electrical components should be considered. Choosing electrical components of well-known brands and reliable quality can improve the reliability and stability of the power distribution cabinet and reduce the probability of failure. The quality of electrical components can be evaluated by checking the product's certification mark, user reviews, etc. At the same time, pay attention to choosing regular channels to purchase electrical components to ensure product quality and after-sales service.
In addition, the installation method and size of the electrical components should also be considered. Different electrical components have different installation methods and size requirements. It is necessary to select suitable components according to the structure and space of the power distribution cabinet. For example, some small circuit breakers can be installed in a rail installation method, while large circuit breakers may require a fixed installation method. When selecting components, ensure that their size can adapt to the space requirements of the power distribution cabinet for easy installation and maintenance.
Finally, cost factors should be considered. On the premise of meeting the performance and quality requirements, choosing reasonably priced electrical components can reduce the cost of the power distribution cabinet. However, you cannot choose unreliable components just to reduce costs, otherwise it may bring greater costs to the subsequent operation and maintenance.
In summary, the selection of electrical components in the power distribution cabinet needs to comprehensively consider factors such as purpose, load type, performance parameters, brand quality, installation method, size and cost to select suitable electrical components to ensure the normal operation and safety and reliability of the power distribution cabinet.
