The invention relates to an intelligent prefabricated substation, in particular to a set of distribution devices for the transformation and distribution field. The substation comprises a main control module, a measurement module, a display module, a switch control module, a fault recoding function module, an earthing test function module and other function modules. A
single chip microcomputer is arranged on the main control module. The functional modules are controlled by the
single chip microcomputer directly and work relatively independently. The measurement module collects and processes the data of the current and
voltage input signals of a three-phase
AC circuit through an AC sampling method, measures current,
voltage, active power, reactive power,
power factor, phase, frequency and
electric energy parameter, stores measured data in
EEPROM for an upper monitor to read and analyze for later
processing. The switch control module is provided with a
relay, monitors the state of switches, receives switch control commands sent by the upper monitor and makes the corresponding switch work by controlling the
relay. The invention has the advantages of convenient manufacture and quick maintenance.