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China GZDW Series DC Power Supply Cabinet - Reliable Suppliers & Factory for Power Stations and Substations
Detail introduction
The product uses high-frequency switching power module or phase controlled rectifier device as a charging float charging device. GZDW has the characteristics of advanced technical indicators, low maintenance, high efficiency and small size, etc. It intelligently manages battery charging, float charging, and DC power supply working conditions to ensure the service life of batteries. Products equipped with microcomputer controllers (PLC controllers or micro controllers) also have remote control functions, which improve the reliability and automation level of DC systems.
Service conditions
- Installation site: indoor installation (can also be installed in the box type substation);
- Ambient temperature: -10℃ - + 40℃, the daily average temperature is not higher than 35 ℃;
- Altitude: ≤2000m;
- Relative humidity: daily average ≤95%, monthly average ≤90% (20℃);
- Vertical alignment: The product should be mounted vertically, tilt ≤5°;
- Environment protection: Pollution level ≤ 3, no conductive particles in the environment, no explosive media, no harmful gases that corrode or damage insulation, no strong magnetic field interference, and the installation site has good air flow and heat dissipation conditions;
- Seismic safety: The seismic intensity is less than 8, and the installation site is free from severe vibration and impact;
- Magnetic interference: There is no strong electromagnetic interference, and the external magnetic field induction strength shall not exceed 0.5 Mt;
- AC input voltage wave: The AC input voltage is a sine wave, with non-sinusoidal content not exceeding 10%.;
- Voltage asymmetry: The three-phase voltage asymmetry of the AC input voltage shall not exceed 5%.
Working principle
Programmable logic controllers (PLC) or micro controllers can be used as the central execution equipment for the DC power supply cabinet microcomputer monitoring system to comprehensively monitor the operation status of the DC panel, achieving comprehensive control of the system, battery charging and discharging management, battery inspection, bus voltage regulation, and other functions. It also has functions such as parameter setting, data acquisition, operation command setting, alarm, networking, and remote communication (typical configuration: RS485 communication interface, Modbus communication protocol) to ensure safety, reliability, and stability.
Main charging state
Main charging refers to the constant current charging of the battery by the device with a set "charging current". When the voltage rises to the set value of the average charging voltage, the device automatically switches to constant voltage charging state, and the main charging ends at this time. This state is mainly used for battery activation and initial charging.
Uniform Charging State
Uniform charging is when the charging voltage of the device rises to the "Uniform Charging Voltage" value, and the device automatically switches to constant voltage charging. The constant voltage value is the set "Uniform Charging Voltage" value. When the charging current gradually decreases to a certain value, the device will automatically switch to float charging state when the equalization time reaches, so the equalization charging state has a constant voltage current limiting function.
Float charging state
Float charging is a device that charges the battery at a constant voltage in a constant voltage manner, so that the battery is always near full capacity. Floating charging is the long-term working state of a floating charging device, which mainly supplies the working current of normal relays, signals, and control circuits, compensates for the energy loss caused by battery self discharge, and also supplies power to DC loads.
Technical parameters
- AC input voltage: AC380V ± 15%, 50Hz ± 5%; AC220V ± 10% (wall mounted power supply)
- DC output voltage: DC220V，DC110V，DC48V；
- Output current: Control bus (KM) 5-200A, closing bus (HM) 5-3000A;
- Battery Capacity: Lead acid maintenance free battery 10Ah~3000Ah;
- Panel size: 2260mm (height) x 800mm (width) x 600mm (depth) or 2360mm (height) x 800mm (width) x 600mm (depth), can also be customized according to user requirements.
- Technical parameters of charging device: Detailed comparison below.
| Charging device category / Technical parameters Item | KVAD5 thyristor fully controlled floating charging device | High frequency switching power supply charging device |
|---|---|---|
| Voltage stabilization accuracy | ≤ ± 1% | ≤ ± 0.5% |
| Current stabilization accuracy | ≤ ± 1% | ≤ ± 0.5% |
| Ripple factor | ≤ 1% | ≤ 0.1% |
| Efficiency | > 85% | > 90% |
| Noise | < 55dB | < 55dB |
Frequently Asked Questions (FAQ)
1. What are the main benefits of the GZDW DC power supply cabinet?
GZDW features advanced technical indicators, low maintenance, high efficiency, and a compact design. It intelligently manages battery charging and discharging cycles to prolong battery life and offers remote control functionalities via PLC or microcomputer controllers.
2. What are the installation environment requirements for GZDW?
It should be installed vertically (tilt ≤5°) indoors or in box-type substations, with temperatures between -10℃ and +40℃, relative humidity under 95%, altitude below 2000m, and free from severe vibration, electromagnetic interference, or corrosive gases.
3. What is the difference between Main Charging and Uniform Charging?
Main charging is a constant current phase used for initial charging or battery activation until the target voltage is reached. Uniform charging is a constant-voltage, current-limiting process that safely balances the battery capacity before transitioning to the float charging state.
4. Why is the Float Charging state important?
Float charging is the long-term operational state that keeps the battery fully charged. It supplies constant voltage to compensate for self-discharge and powers normal DC loads, ensuring the system is always ready to handle power demands.
5. How does the High-Frequency Switching device compare to the Thyristor device?
The high-frequency switching power supply offers superior voltage and current stabilization (≤ ±0.5% vs. ≤ ±1%), a significantly lower ripple factor (≤ 0.1% vs. ≤ 1%), and higher overall efficiency (>90% vs. >85%) compared to the KVAD5 thyristor device.
6. Can the panel dimensions of the GZDW cabinet be customized?
Yes. While the standard height is 2260mm or 2360mm with a width of 800mm and depth of 600mm, the system panel sizes can be fully customized to meet specific customer and facility requirements.