FACTORY-ASSEMBLED TRANSFORMER SUBSTATION Russian patent published in 2002 - IPC

FIELD: electric energy supply of essential services. SUBSTANCE: unit of high-voltage equipment of factory-assembled transformer substation is fitted with disconnecting switch of internal mounting, grounding knives and mechanical interlocking between disconnecting switch and entrance door, limiter of overvoltage, dry power transformer. Unit of low-voltage equipment has input automatic circuit breakers and automatic circuit breakers of outgoing feeders on which telecontrol, teleindication and telemetering devices are installed. It also includes protective disconnection device with differential switch, microprocessor units of protection and automatics mounted for possible change of settings of protection over telemechanic channels, magnetoelectric contact of sealed type installed for possible automatic disconnection when current reaches critical level. Microprocessor programming units are put on automatic circuit breakers of outgoing feeders. Set of telemechanic aids comprises overvoltage protection system, system of activation of automatic valve releasing air pressure in case of short-circuit, systems of telecontrol, teleindication and telemetering which are connected to telemechanic system of essential service with the aid of telemechanic units and communication channels. Telemechanic system transmits signals to operator with the help of modem and communication line. EFFECT: widened functional potential, increased reliability and safety engineering. 9 cl, 2 dwg