DC boards are applied for uninterrupted supply of operating control, protection, automatics and signaling circuits, switching devices electromagnets, emergency lighting, critical auxiliary mechanisms, as well as for continuous stations and substations switchgears supply system parameters monitoring.
DC board can be equipped with microprocessor control system, which provides receipt and transmission of data on all main circuits switching devices state and network parameters into remote control system, as well as transmission of signals from operator for drive equipped switching devices closing and opening.
DC boards are connected to DC power supplies: chargers, rechargers and accumulator batteries.
DC board is applied for operation in isolated networks with rated voltage up to 230 V DC.
DC board is equipped according to single line diagram or data sheet of various purposes cabinets:
DC boards provide the following functions:
Automatic withdrawable, plug-in and fixed circuit breakers produced by Schneider Electric (France), ABB (Germany) or other manufacturers can be applied for DC board cabinets.
To prevent accidental contact with live parts outgoing lines automatic circuit breakers are installed behind rotating frames in cabinet middle section behind external doors. Up to 12 three–pole circuit breakers or up to 20 two–pole modular circuit breakers can be installed in one line DC board cabinet.
Molded-case automatic circuit breakers with high shock and vibrations resistance provide electromagnetic compatibility and allow application in tropical climate.
Benefits of automatic circuit breakers applied in DC boards:
DC board can be equipped with microprocessor control system.
Furthermore, industrial controller is installed in one of DC board cabinets, providing receipt and transmission of data on all main circuits switching devices state and network parameters into remote control system, as well as transmission of signals from operator for drive equipped switching devices closing and opening.
Analogue or digital current and voltage monitoring measuring devices can be installed in line cabinets (digital devices can be equipped with RS-485 interface for measurement values output into remote control and automation system).
Bender GmbH (Germany) devices provided for operation in DC isolated networks, are applied for DC boards insulation monitoring. Measured insulation resistance is continuously displayed on LCD screen.
Front panels with color symbolic circuit corresponding to set of switching equipment for each cabinet and visual color LED position indicators (on/off) of switching devices are located on the doors of switchgears. It allows operational staff to be easily informed about condition of power supply circuits of metro power consumers.
Please contact us in case you have any technical queries, requests regarding customized procurement or delivery time of equipment.