SOPT (systems of operational direct current with a wide range of nominal parameters) is a set of converters, storage and distribution devices designed for uninterrupted power supply of critical DC power consumers, as well as monitoring the parameters and status of the power system.
SOPTs are used at power stations, main, network and subscriber substations, power supply centres of power grids, substations and distribution points of industrial and civil facilities.
FPSS can have a centralised or decentralised structure. A centralised DIS uses one set of components, while a decentralised DIS uses two or more components.
Classification of DIS depending on the rated current of busbars:
Series "S"- rated busbar current up to 80 A
Series "M"- rated busbar current up to 160 A
Series "L"- rated busbar current up to 250 A
XL series - busbar current rating up to 630 A
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