Application and Product Description of GZDW Intelligent Maintenance-free DC Power Supply Screen-Industry dynamics-Yantai Haibo Electrical Equipment Co., Ltd-Haibo Electric

Application and Product Description of GZDW Intelligent Maintenance-free DC Power Supply Screen

DC screen is the abbreviation for DC power operating system. The universal name is Intelligent Maintenance-free DC Power Supply Screen, abbreviated as DC Screen, and the universal model is GZDW, and DC Screen is used to supply this type of DC power.Simply put, a DC screen is a device that provides a stable DC power supply. When a 380V power supply is input, it is directly converted to 220V. When there is no input for both mains and backup power, it is directly converted to battery power supply. DC 220V can also be considered as an industrial emergency power supply.

The power operation power supply in power plants and substations currently uses DC power supply, which provides power for controlling loads, power loads, and DC accident lighting loads, and is the foundation of contemporary power system control and protection. The DC screen consists of an AC distribution unit, a charging module unit, a step-down silicon chain unit, a DC feeding unit, a distribution monitoring unit, a monitoring module unit, and an insulation monitoring unit.Mainly used in small and medium-sized power plants, hydropower stations, various substations, and other users who use DC equipment (such as petrochemicals, mines, railways, etc.) in the power system, suitable for instruments, meters, relay protection, and fault lighting in switch opening and closing and secondary circuits.

HB-GZDW series intelligent high-frequency switch DC power supply system，It is a power operation power supply product developed, designed, and produced by our company. Among them, the design of the centralized monitor, charging module, and each monitoring unit adopts the world's most advanced technology with successful operation experience, and combines the characteristics of China's power system. Widely used in power system substations, substations, small and medium-sized power plants, hydropower stations, etc., as an operating power source for the opening and closing of high-voltage circuit breaker DC operating mechanisms, relay protection, automatic devices, signal devices, etc., and as a DC power source for accident lighting and control.

【Click on the image to learn about the DC power supply HB-GZDW】

The HB-GZDW DC power supply system of Haibo Electric includes a charging monitoring module, 220V charging module, lightning surge absorber, voltage reduction device, instrument, voltage and current acquisition module, and DC feeder monitoring module.

1. The circuit breaker of the charging unit system should be high-quality high breaking DC circuit breaker, and consider the coordination between upper and lower levels. A current time action characteristic curve report should be provided, and it should meet the level 3-4 differential coordination. Each circuit breaker should be equipped with a trip alarm contact.

2. Fuses and switches in important positions such as batteries should be equipped with auxiliary contacts and led from the terminal block.

3. The feeder circuit breaker should have a signal light indicating the on/off status. The main function that the DC feeder monitoring module should have is to monitor the insulation status of the DC bus to ground online (including the insulation status of the DC bus and each feeder branch), and automatically detect faulty branches. It can monitor the positive to ground and negative to ground voltages of the bus, and detect the positive to ground resistance and negative to ground resistance of each branch.

4. The DC feed out requires the selection function of AC/DC branches.

5. The DC main busbar and joints should be able to meet the requirements of long-term current passing, and the busbar should be made of flame-retardant insulated copper busbar.

6. The charging unit should be equipped with a voltage reduction device, and the noise should not exceed 55dB. The silicon chain voltage regulator should have reliable anti open circuit protection function and have remote signal output for operating status.