Low-voltage complete set of equipment parameter table

Low-voltage complete sets of equipment are modular switchgear assemblies designed for safe power distribution, motor control, and reactive power compensation, typically rated up to 1000V AC or 1500V DC.Rated Electrical ParametersVoltage: Typically 380V, 400V, 660V AC for three-phase systems, with a maximum of 1000V AC or 1500V DC according to IEC 61439 standards .Current: Rated currents generally up to 4000A, depending on the application and design .Frequency: Designed for 50Hz or 60Hz three-phase AC systems .Short-Circuit Withstand: High short-circuit strength is ensured through horizontal busbar arrangements and compartmentalized design .Structural and Mechanical ParametersCabinet Types: Fixed, removable, or withdrawable main circuits, allowing safe connection/disconnection under energized or de-energized conditions .Frame and Assembly: Main frames often use modular steel sections (e.g., 8MF type) with flexible installation holes; cabinets can be fully assembled or partially welded .Compartmentalization: Functional units are separated into bus rooms, cable rooms, and functional unit rooms to isolate circuits and improve safety .Protection Against Environmental Factors: Cabinets provide protection against splash, vibration, electromagnetic interference, and intrusion by animals .Ingress Protection (IP): Commonly IP30 or IP40, depending on the environment .Functional and Safety ParametersProtection: Overcurrent, short-circuit, overload, and leakage protection are integrated .Monitoring and Measurement: Voltage, current, frequency, and power quality monitoring are included for operational safety .Automation and Interlocking: Intelligent features such as remote control, fault diagnosis, predictive maintenance, and safety interlocks prevent misoperation .Temperature Rise Limits: Compliance with IEC 61439 requires verification of temperature rise under rated current to prevent insulation degradation and fire hazards .Dielectric Properties and Shock Protection: Ensures safety against direct and indirect contact .Types of Low-Voltage Complete SetsPower Control Center (PCC): For general power distribution.Motor Control Center (MCC): For centralized motor control.Reactive Power Compensation Cabinet: For capacitor-based reactive power management .Compliance and VerificationStandards: IEC 61439 governs design, testing, and verification, eliminating distinctions between type-tested and partially type-tested assemblies, ensuring uniform safety and performance .Verification Methods: Assemblies are verified through testing, calculation, or comparison with reference assemblies to meet temperature, short-circuit, and dielectric requirements . These parameters collectively define the electrical, mechanical, and functional characteristics of low-voltage complete sets, ensuring safe, reliable, and efficient power distribution in industrial and commercial applications.