DDBG digital integrated cabinet wall mounted DC power supply is designed by our company for small capacity systems; It is suitable for small switching stations and small user substations. The system adopts the integrated design idea and consists of rectifier module, monitoring module, power distribution unit and battery installation box; It has the characteristics of small volume, simple structure and independent system; The monitoring module adopts LCD Chinese menu display, which has perfect system monitoring and battery automation management functions. It has four remote interfaces to connect with the automation system, and provides RS485 host computer communication interface and CDT, MODBUS two communication protocol options.
1. System functional characteristics
It is suitable for forming systems below 38AH/220V and 65AH/110V.
The charging module and monitoring module adopt the hot plug structure, which is convenient for installation and maintenance.
Two 3A/220V and two 5.0A/110V digital intelligent charging modules can be installed.
The monitoring module has a built-in silicon chain, which has the function of automatic voltage reduction. * * * The current is 3A, and the impact current is 30A/0.5S.
The monitor adopts LCD display, Chinese menu and key operation to realize system parameter setting, system working parameter display, system fault indication and other functions.
The monitoring module has the functions of automatic battery management and bus insulation detection to ground.
It provides RS485 communication interface, CDT and MODBUS communication protocol options, and can be connected with substation automation system.
The monitor realizes battery voltage, bus control voltage, bus control current, battery charging and discharging current, and module status detection.
The battery inspection unit can be expanded according to the system requirements.
2. System technical indicators
AC input voltage: 220V ± 20%
Power grid frequency: 50Hz ± 10%
Output voltage range: 90V-130V continuously adjustable (110V system), 180V-265V continuously adjustable (220V system)
Output current limiting: 0.3A-3A/0.5A-5A (single module)
Voltage stabilization accuracy: ≤± 0.5%
Current stabilization accuracy: ≤± 0.5%
Ripple coefficient: ≤± 0.1%
Current sharing degree: ≤ 5%
Efficiency: ≥ 93%
Output overvoltage protection: 280V ± 2V (220V), 140V ± 2V (110V)
Insulation resistance: ≥ 10M
Insulation strength: 2KVAC is applied to output to ground, input to ground, and input to output for 1min without flashover.
Relative humidity: ≤ 90%
Ambient temperature: - 5 ℃～ 45 ℃
3. System structure and installation
3.1. The wall mounted power supply system of DDBG digital integrated cabinet is composed of wall mounted movement, incoming feeder switch, power distribution and chassis.
Wall mounted movement: including two charging modules and one monitoring module;
Incoming feeder switch: including one AC incoming line switch, one battery switch and multiple bus combining and controlling feeder switches;