Product Overview
The GZDW intelligent high-frequency switching DC power supply cabinet is a modular, high-reliability DC power system designed for power plants, substations, industrial facilities, commercial buildings, and infrastructure projects. It provides stable and reliable DC power for switchgear operating mechanisms, protection and control devices, emergency lighting, and communication equipment.
The product complies with DL/T 5044, GB/T 19826, and relevant international standards, featuring advanced high-frequency switching rectifier technology with intelligent battery management and comprehensive monitoring capabilities. The system ensures continuous and reliable DC power supply even under adverse grid conditions, making it an ideal solution for modern power distribution systems requiring high availability and operational reliability.

Key Features
1. High-Frequency Switching Rectifier Technology
The system employs advanced high-frequency switching rectifier modules with active power factor correction, high efficiency, and wide input voltage range. The rectifier modules are hot-swappable for easy maintenance and system expansion, ensuring continuous operation during module replacement.
2. Intelligent Battery Management
The system features intelligent battery charging and discharging management with automatic temperature compensation, equalized and float charging modes, and battery health monitoring. The battery management system extends battery service life and ensures reliable backup power availability.
3. Modular and Expandable Design
The system is built with modular rectifier units, monitoring units, and battery units, allowing flexible configuration and future capacity expansion. The modular design enables standardized components, simplified maintenance, and reduced spare parts inventory.
4. Comprehensive Monitoring and Control
The integrated intelligent monitoring unit provides real-time monitoring of system parameters including input voltage, output voltage, output current, battery voltage, battery current, ambient temperature, and system status. The monitoring unit supports multiple communication protocols including Modbus, IEC 61850, and IEC 60870-5-101 for seamless integration with SCADA and substation automation systems.
5. High Safety and Reliability
The system incorporates comprehensive protection features including input overvoltage protection, input undervoltage protection, output overvoltage protection, output overcurrent protection, output short-circuit protection, battery reverse connection protection, and overtemperature protection. The cabinet is divided into separate compartments for AC input, rectifier modules, battery units, and DC output for enhanced safety.
6. Advanced Insulation Monitoring
The system includes DC insulation monitoring with automatic line selection for ground fault detection. The insulation monitoring function provides early warning of insulation degradation, preventing equipment damage and ensuring personnel safety.
7. User-Friendly Interface
The system is equipped with a large LCD touch screen display providing intuitive access to system parameters, alarm records, and operating status. The interface supports local operation and configuration with password-protected access levels for enhanced security.
8. Wide Application Compatibility
The system is compatible with various battery types including valve-regulated lead-acid batteries, gel batteries, and lithium batteries. The system supports multiple output voltage levels including 220VDC, 110VDC, and 48VDC for diverse application requirements.

Technical Specifications
Rated Input Voltage: 380VAC ± 15%, 50Hz or 60Hz
Rated Output Voltage: 220VDC, 110VDC, 48VDC (customizable)
Output Current: 10A, 20A, 30A, 50A, 100A, 200A, 300A, 500A (customizable)
Regulation Accuracy: ≤ ± 0.5%
Ripple Factor: ≤ ± 0.5%
Efficiency: ≥ 92% (at rated load)
Power Factor: ≥ 0.92
Battery Type: Valve-regulated lead-acid, gel, or lithium battery (customizable)
Battery Capacity: 20Ah to 3000Ah (customizable)
Communication Protocols: Modbus-RTU, IEC 61850, IEC 60870-5-101, IEC 60870-5-104
Protection Rating: IP30, IP40, IP54 (customizable)
Enclosure Material: High-strength steel plate with electrostatic powder coating
Cabinet Dimensions: 600mm, 800mm (width) x 600mm, 800mm, 1000mm (depth) x 2000mm, 2200mm, 2260mm (height)
Operating Temperature: -5°C to +40°C
Altitude: Up to 3000m above sea level (customizable)

Applications
The GZDW DC power supply cabinet is extensively used in power plants and substations for providing DC power to switchgear operating mechanisms, circuit breaker closing and tripping, protection and control devices, and SCADA systems. Industrial facilities including manufacturing plants, mining operations, petrochemical plants, and metallurgical facilities rely on this system for reliable DC power supply. Commercial and high-rise buildings utilize this system for emergency lighting and critical load backup power. Infrastructure projects such as airports, railway stations, and ports employ this system for communication and signaling equipment. Renewable energy applications including photovoltaic plants and wind farms use this system for control systems, communication equipment, and emergency backup power.

Compliance Standards
DL/T 5044 Technical Specifications for DC Power Supply Systems in Substations, GB/T 19826 General Technical Specifications for DC Power Supply Equipment in Power Plants and Substations, IEC 62040 Uninterruptible Power Systems, and GB/T 20641 General Requirements for Low-Voltage Switchgear Enclosures.

Why Choose Us
Our GZDW DC power supply cabinet features high-frequency switching rectifier technology with high efficiency, wide input voltage range, and hot-swappable modular design for easy maintenance. The intelligent battery management system ensures reliable backup power availability and extended battery service life. We perform comprehensive quality control including electrical verification, protection calibration, and communication protocol testing before delivery. Customization options are available for output voltage, output current, battery capacity, and communication protocols to meet specific project requirements. Our engineering team provides professional technical support for system design, installation, and commissioning. Competitive pricing and efficient manufacturing processes ensure value for money. Comprehensive after-sales service includes installation guidance, commissioning assistance, spare parts supply, and remote technical support. Our DC power supply systems have been installed in numerous projects worldwide with proven reliability and customer satisfaction.