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DC power component steps

Issuing time:2015-07-16
SHENZHEN Branch Power Technology Co., Ltd.-DC power component steps

DC power supply consisting mainly of two parts. A part of the screen is the battery, and the other part is DC charging screen (DC-screen). Battery screen that can be placed in a multi-cell battery cabinets (800 × 600 × 2260). Battery screen battery is normally provided by 2V-12V battery to 9-108 in series composition, corresponding electrical output voltage is 110V or 220V. Batteries currently used mostly maintenance free valve regulated lead-acid batteries. The main screen is displayed by the current cabinet, rectifier systems, surveillance systems, insulation monitoring unit, battery inspection unit, a switch detection unit, and a series of step-down unit AC input and DC output voltage and current display Distribution Unit .

1, the monitoring system: monitoring system to control the entire DC system, the management of the core, and its main tasks are: the functional units of the system and a battery for long-term automatic monitoring, access to the system in a variety of operating parameters and status, according to the measurement data and running in time for processing, and as a basis for system control, automatic management of the power system to ensure the continuity of its work, reliability and security. Monitoring system is currently divided into two types: one is the button-type there is a touch screen type. : Surveillance systems for human-computer interface, operating parameters for system display, system control operating and system parameters.

2, rectifier systems: power rectifier module is the AC into DC stand-alone module, usually by the current nominal size (eg 2A module, 5A module, 10A module, 20A module, etc.), according to different design concepts It can also be divided into: air-cooled module, independent air duct module, self-cooling module, self-energy and self-cooled module can be self-cooling module. It can be more than one parallel to achieve the N1 redundancy. Module output is 110V, 220V stable adjustable DC voltage. Module itself has a more complete range of protection features such as: input overvoltage protection, output overvoltage protection, output current limiting and output short circuit protection.

3, battery inspection unit: battery inspection unit is on the line battery voltage conditions patrol detected a device ring. Can be detected in real time how much the battery voltage of each section, which section when the battery voltage is higher than or lower than the setting, it will send an alarm signal, and through the monitoring system shows which section is battery failure. Battery inspection unit can generally detect 2V-12V battery and battery patrol loop detection section 1-108.

4, power distribution units: DC panel distribution unit mainly in order to achieve the AC input and DC output voltage display, the device used for other functions such as current display: Power cord, terminals, AC breaker, DC circuit breakers, contactors , lightning, splitters, fuses, switches, buttons, switches, indicators, and current, voltage meter and so on.

5, insulation monitoring unit: DC system insulation monitoring unit is a device that monitors the DC system insulation can be real-time monitoring of the line-to-ground leakage resistance, this value can be set depending on the circumstances. When the line of the insulation is reduced to the set value, it will send an alarm signal. DC system insulation monitoring unit currently has bus insulation monitoring, slip insulation monitoring.

6, Buck unit: buck is a buck regulator device unit, is co-parent input voltage buck units, down unit and then output to control the mother, adjust bus controlling voltage within a set range (110V or 220V). When the co-parent voltage, the buck unit automatically adjusts the output voltage to ensure stability. Step-down unit is also based on the size of the output current to nominal. Step-down unit there are two, one is a level diode chain, one is no class buck chopper. A step-down buck silicon chain have five and seven down, voltage regulation point is 3.5V, ie co-parent 3.5V voltage rise or fall buck silicon chain automatically adjust bus controlling voltage stability. No class buck is a buck chopper module, it is smaller than the diode chain volume, it does not point the output voltage of the voltage regulator than the diode chain to stabilize, and overvoltage, overcurrent, and battery discharge and other functions. But the current step-down chopper stepless technology is not very mature often malfunction, they still use a wide range of diode chain efficiency.

7, the switch detection unit: switch detection unit is a device to switch line detection and alarm dry contact output. For example, in the entire system in which the circuit breaker fails to trip or the fuse blows after which way the switch will send an alarm signal detecting unit, and through the monitoring system which was shown to be faulty circuit breaker tripped or fuse which way It is blown. Currently switch detection unit can be collected 1-108-way switch and multiplex passive dry contact alarm output.

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