Customizable GZDW DC Power Supply Supply System 110V 220V Intelligent DC Panel Battery Charger Cabinet for Switchboard

Designed to serve as the DC auxiliary power backbone of electrical substations, switchboard installations, and industrial power plants, the Customizable GZDW DC Power Supply Supply System 110V 220V Intelligent DC Panel Battery Charger Cabinet for Switchboard delivers precisely regulated DC output at 24V, 48V, 110V, or 220V while simultaneously maintaining a connected battery bank in a fully charged, ready-to-discharge condition. Certified to IEC 62040 and GB/T 7260 and manufactured under ISO 9001 quality management by JYDQ in Zhejiang, China, the GZDW Series provides the DC operating supply for protection relays, circuit breaker trip and close mechanisms, SCADA remote terminal equipment, telecommunications systems, and emergency lighting — all of which must remain available without interruption even when the AC grid fails completely.

Main Technical Parameters

Technical Performance Parameters

The GZDW Series covers 13 output current ratings — 5, 8, 10, 15, 20, 30, 40, 50, 80, 100, 150, 200, and 250A — paired with 14 compatible battery capacities from 10Ah to 400Ah. This range scales from a compact 12kV urban switching station requiring 5A and 10Ah to a 252kV extra-high-voltage transmission substation demanding 250A and 400Ah battery backup. Voltage and current stabilization accuracy is guaranteed below ±1% across the full 0 to 100% regulation range, ensuring consistent operating voltage regardless of load variation or AC supply fluctuation. The output DC ripple coefficient stays below 1% — on a 220V system, this limits AC ripple to under 2.2V peak-to-peak, protecting digital protection relay switch-mode power supplies from instability. Rectifier conversion efficiency exceeds 90%, acoustic noise is held below 55dB, and the main transformer temperature rise limit of 70°C supports 24-hour continuous operation. Protection degree is IP20 to IP30.

Intelligent Battery Management

The Customizable GZDW DC Power Supply Supply System 110V 220V Intelligent DC Panel Battery Charger Cabinet for Switchboard maintains battery readiness through a three-stage adaptive charging system. The microprocessor controller continuously reads battery terminal voltage, charge and discharge current, and ambient temperature, selecting between float charge for daily maintenance, boost charge for rapid post-discharge recovery, and equalization charge for periodic cell voltage balancing. Temperature-compensated charging voltage automatically adjusts to ambient conditions, preventing thermal runaway in sealed VRLA batteries and insufficient charging in cold-climate installations. An undervoltage protection circuit prevents damaging deep discharge. This active management extends VRLA service life toward 8 to 10 years — substantially longer than the 3 to 5 years typical of basic constant-voltage charger designs — reducing the battery replacement cost that represents the largest single lifecycle expense of a DC supply system.

Protection, Monitoring, and SCADA Integration

AC input monitoring at the GZDW controller continuously checks the three-phase supply for phase loss, phase sequence reversal, under-voltage, over-voltage, and frequency deviation, blocking rectifier operation if supply quality falls outside tolerance. Rectifier module protection responds to overload, short-circuit, over-temperature, and fan failure. On the DC side, bus supervision monitors over/under voltage and earth faults independently on both positive and negative poles. Individual feeder circuit breaker status and load current measurements are available for each DC distribution feeder, enabling rapid isolation of faulted circuits without interrupting the main bus. Standard volt-free alarm contacts provide common, urgent, and non-urgent outputs for substation alarm annunciators. Optional Modbus RTU or IEC 61850 interfaces allow full SCADA integration, supporting remote monitoring, control, and time-stamped event logging.

Application Scenarios

• Substation Protection and Control DC Supply: The GZDW delivers 110V or 220V DC to protection relay systems, circuit breaker trip coils, bay controller units, and local control panels. In substations where circuit breaker 630a-class and higher-rated breakers handle fault clearance, the DC operating supply must remain at rated voltage through the complete trip-close-trip sequence — a condition the GZDW ±1% regulation guarantees under all rectifier load and battery state-of-charge combinations.
• SCADA and Telecom DC Supply: The 48V DC output powers remote terminal units, communication processors, fibre-optic multiplexers, and teleprotection terminals, maintaining grid visibility and control through extended AC outages and enabling coordinated restoration activities.
• Emergency Safety Systems: The 24V or 48V output sustains emergency lighting, fire detection systems, and personnel access control equipment in substation buildings, ensuring evacuation safety during complete station blackout conditions.
• Power Plant Auxiliary DC: In thermal, hydro, and renewable generation facilities, the GZDW powers generator protection, excitation system backup supplies, turbine emergency lube oil pump starters, and coordinated plant shutdown systems that must operate independently of the station AC auxiliary supply.
• Industrial Process and Automation DC: Applications including electrochemical processing, plating lines, DC motor drives, and industrial automation controllers benefit from stable regulated high-current DC with sub-1% ripple. Where power factor regulation equipment operates on the same AC supply bus, the GZDW AC monitoring protects rectifier operation from supply disturbances during reactive power compensation switching events.

Procurement and Installation

The Customizable GZDW DC Power Supply Supply System 110V 220V Intelligent DC Panel Battery Charger Cabinet for Switchboard ships from MOQ of 1 set, priced FOB Ningbo or Shanghai on request, in 25 to 40 working days in export-standard wooden crates with moisture-barrier lining. Payment terms include T/T and L/C at sight; monthly supply capacity is 200 sets. During the substation energization procedure, energize the GZDW first and confirm rectifier output, battery voltage, and earth fault status are healthy before placing any protection relay or circuit breaker mechanism in service. Contact JYDQ for custom specifications and project-specific sizing.

FAQ

1. What is the main function of GZDW DC power supply system?

GZDW is a high-frequency switching DC power supply system. It provides stable DC operating power forprotection, control and tripping circuits of high-voltage switchgear. It can continuously supply power evenwhen AC mains fails.

2. What application scenarios are suitable for GZDW DC system?

It is widely installed in indoor substations, power plants, photovoltaic booster stations and industrialdistribution rooms, matching with KYN28, HXGN, XGN66 and other medium voltage switchgear.

3. What core technical parameters of GZDW can be customized?

We can customize rated DC voltage, battery capacity and system configuration. The overall design can beadjusted according to the total DC load of the whole substation.

4. What certifications do your GZDW DC power supply systems have?

All our GZDW DC power supply systems hold CE certification. We can provide CE documents and complete technical datasheets for tender submission and customs clearance.

5. What warranty service do you provide for GZDW system?

We provide 10 years warranty for all GZDW DC power supply systems. Our technical team provides remote operation guidance and fault analysis support during the whole warranty period.