Low Voltage Power Cabinet
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As an important equipment in the power distribution system, Low Voltage Power Cabinet is mainly used for power transmission, control, protection and monitoring of electrical equipment and lines in low-voltage power systems. Low-voltage power distribution cabinets are usually composed of electrical control and protection components (such as circuit breakers, contactors, fuses, thermal relays, etc.) and control panels. These components can not only realize the power supply and electrical equipment to receive, distribute and output power, but also protect against overload, short circuit, undervoltage, overvoltage and other conditions in the circuit, thereby improving the safety and efficiency of electrical equipment.
In specific applications, low-voltage power distribution cabinets are widely used in power distribution systems with AC 50Hz, rated working voltage 380V, and rated working current up to 3150A for power users such as power plants, substations, factories and mines, etc., for power conversion, distribution and control of power, lighting and distribution equipment.
How to design a low-voltage power cabinet to achieve optimal performance
- Load assessment: First, clarify the load type (resistive, capacitive, inductive), capacity and possible future expansion needs served by the power cabinet.
- Use environment: Consider the environmental conditions of the installation site, such as temperature, humidity, dust, corrosive gases, etc., to ensure that the materials and protection level (such as IP level) meet the needs of the site.
- Safety standards: Follow national and local electrical safety regulations, such as China’s GB standards and international IEC standards, to ensure design compliance.
- Cabinet type selection: Select the appropriate cabinet type according to the application occasion, such as fixed, drawer, intelligent control cabinet, etc., to ensure easy operation and maintenance.
- Layout optimization: Reasonably layout electrical components to ensure simple wiring, good heat dissipation, reduce mutual interference, and facilitate troubleshooting.
- Heat dissipation design: Use appropriate heat dissipation measures, such as fans, heat sinks, temperature control switches, etc., to keep the temperature in the cabinet within the allowable range and extend the life of the equipment.
- Protection configuration: Reasonably configure electrical protection devices such as overload protection, short circuit protection, leakage protection, etc. to ensure the safety and reliability of the system.
- Power quality: Consider reactive power compensation and harmonic control, select appropriate capacitors, filters, etc. to ensure power quality.
- Wiring specifications: Follow electrical specifications for wiring, ensure that the cross-sectional area of the wire meets the current carrying requirements, and reduce voltage drop and power loss.