Zhejiang Yuebian Transformer Co., Ltd.

China Manufacturer with main products: Power Transformer, Transformer Substation, Switchgear, Switch Cabinet, Combined Transformer, Distribution Transformer, American Substation,...

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GZ3(GZG) series DC power supply cabinets (intelligent high frequency switch type)

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Specifications

Application
GZ3(GZG) series DC power supply cabinets (intelligent high frequency switch type) are suitable for the DC power supply systems of electric equipment and relay protection device in power plants and transformer substations, used as power supply device for controlling, signal, communication, protection as well as DC emergency lighting and power sets. 
The product adopts high frequency switch type rectifying device, is featured with small volume, light quality, superior technical index, modular design, N+1 warm back-up mode, convenient “four remote”, etc. The product proceeds intelligent management to the charging condition of storage battery and working state of DC power supply cabinet, so that to guarantee service life of storage battery. It is equipped with central controller, with remote control function, improves reliability and automation level of DC system. 
The product is in accordance with JB/T5777.4-2000 General specification and safety requirements for DC power supply equipment of power projects.
Environmental conditions
1. Ambient temperature: -5℃~+40℃, mean monthly temperature not higher than 35℃; 
2. Altitude: 2000m and below  
3. Relative humidity: not exceed 90% (at 25℃), the equipment should be free from condensation during running;
4. The installation site should be free of severe shock or impact , the surrounding medium should be free of explosion hazard or gas or conductive dust that would erode metal and destroy insulation, also should be free from strong magnetic field interference. 
Structural feature
1. Cabinet body is combined structured 
2. The charging/oat charging device adopts multi high frequency rectification modules connected in parallel, N+1 back-up, automatic current sharing. 
3. Perfect monitoring function, high intellectualized, large screen liquid crystal display in Chinese, light and sound alarm, or adopting touch screen. Full intelligent design, DC feeding to each system component like AC distribution and rectification module and realize full-parameter local and remote monitoring and control; main monitoring content covers start/stop of module, charging mode, output voltage regulation, setting of output current limiting point, double-circuit AC automatic switching, automatic management of battery, etc. 
4. The monitoring system is equipped with standard RS-232 or RS485 interface, link up the networks of upper computer, and realize “four remote” functions. 
5. Carry out automatic management and automatic maintenance to the storage battery: real-time monitor the terminal voltage of storage battery, charge and discharge current, control average oat charging automatically and average charging, regular maintenances, etc. 
6. Function of temperature compensation is available at request. 
7. In any case, when the network islanding or when the AC power supply comes across power loss, the storage battery is able to supply power to the control bus without interruption, it guarantees power-off protection and guarantees control and operating power supply for automatic device and HV switch.
 

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