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GZDW Series DC Power Supply Cabinet - Reliable Solutions from China Suppliers and Factory for Power Systems
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℃ to +40℃, the daily average temperature is not higher than 35 ℃.
Altitude: ≤2000m.
Relative humidity: Daily average ≤95%, monthly average ≤90% (at 20℃).
Mounting: The product should be mounted vertically, with a tilt of ≤5°.
Environment: Pollution level ≤ 3, no conductive particles, no explosive media, no harmful gases that corrode or damage insulation, no strong magnetic field interference, and the installation site must have good air flow and heat dissipation conditions.
Seismic intensity: Less than 8, and the installation site must be free from severe vibration and impact.
Electromagnetic interference: No strong electromagnetic interference, and the external magnetic field induction strength shall not exceed 0.5 Mt.
AC input voltage waveform: 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 (H) x 800mm (W) x 600mm (D) or 2360mm (H) x 800mm (W) x 600mm (D) (customizable).
| 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)
What are the main advantages of GZDW DC power supply cabinets?
GZDW features advanced technical indicators, low maintenance requirements, high efficiency, and a compact size. It utilizes intelligent management for battery charging, float charging, and DC power supply conditions to extend battery life.
What are the environmental requirements for installing GZDW systems?
It should be installed indoors (or in box-type substations) at an altitude of ≤2000m, with ambient temperatures between -10℃ and +40℃, and relative humidity not exceeding 95% daily. The environment must be dust-free, non-explosive, free from corrosive gases, and have low electromagnetic interference.
What are the differences between the three charging states?
Main charging is constant current charging used for battery activation. Uniform charging is constant voltage current-limiting charging to equalize battery cells. Float charging is long-term constant voltage charging to keep the battery near full capacity while compensating for self-discharge.
Does the GZDW system support remote monitoring and communication?
Yes, systems equipped with PLC or micro controllers support remote communication, networking, parameter setting, and data acquisition, typically utilizing RS485 communication interfaces and the Modbus protocol.
How does a High Frequency Switching Power Supply compare to a Thyristor device?
The High Frequency Switching Power Supply offers higher efficiency (>90% vs >85%), better voltage and current stabilization accuracy (≤ ±0.5% vs ≤ ±1%), and a significantly lower ripple factor (≤0.1% vs ≤1%), providing a cleaner and more stable output.