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GZDW Series DC Power Supply Cabinet from China Suppliers and Factory for Power Stations and Relays
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
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Installation site: indoor installation (can also be installed in the box type substation);
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Ambient temperature: -10℃ - + 40℃, the daily average temperature is not higher than 35 ℃;
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Altitude: ≤2000m;
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Relative humidity: daily average ≤95%, monthly average ≤90% (20℃);
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The product should be mounted vertically, tilt ≤5°;
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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;
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The seismic intensity is less than 8, and the installation site is free from severe vibration and impact;
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There is no strong electromagnetic interference, and the external magnetic field induction strength shall not exceed 0.5 Mt;
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The AC input voltage is a sine wave, with non-sinusoidal content not exceeding 10%.;
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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: See details in the comparison table 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)
Q1: What are the key features and advantages of the GZDW DC power cabinet?
A1: GZDW utilizes advanced high-frequency switching power modules or phase-controlled rectifiers. It offers high efficiency, low maintenance, compact size, and intelligent battery management to prolong battery life. Systems with PLC or microcontrollers support remote control and automation.
Q2: What environmental conditions are required for GZDW installation?
A2: It is designed for indoor or box-type substation installation. The ambient temperature should range between -10℃ and +40℃ (daily average ≤35℃), altitude ≤2000m, and daily average humidity ≤95%. The unit must be mounted vertically with a tilt of ≤5° in a dust-free, non-explosive space.
Q3: How does the GZDW system manage battery charging?
A3: The system operates in three charging states: Main Charging (constant current for activation), Uniform Charging (constant voltage current-limiting charging to balance capacity), and Float Charging (long-term constant voltage charging to offset self-discharge and support DC loads).
Q4: What communication and remote control capabilities does it support?
A4: When configured with PLC or microcomputer controllers, GZDW supports remote communication, data acquisition, parameter settings, fault alarms, and networking, typically utilizing an RS485 communication interface and Modbus communication protocol.
Q5: How does the High-Frequency Switching Power Supply compare with the KVAD5 Thyristor device?
A5: High-frequency switching devices provide superior performance, including higher voltage stabilization accuracy (≤±0.5% vs. ≤±1%), better current stabilization accuracy (≤±0.5% vs. ≤±1%), a significantly lower ripple factor (≤0.1% vs. ≤1%), and higher overall efficiency (>90% vs. >85%).
Q6: What are the standard output voltages and battery capacities supported by GZDW?
A6: GZDW supports DC output voltages of DC220V, DC110V, and DC48V. It is compatible with lead-acid maintenance-free batteries ranging from 10Ah to 3000Ah capacity. Custom panel dimensions are also available.