MICROPROCESSOR UNIT FOR RELAY PROTECTIVE GEAR, AUTOMATIC AND REMOTE-CONTROL DEVICES Russian patent published in 2004 - IPC

FIELD: electrical and microprocessor engineering. SUBSTANCE: microprocessor unit that can be used in relay protective gear of equipment installed in metalclad switchgear cubicles to protect bushing, sectionalized, and feeder circuit breakers, transformers, and electric motors and in power transmission lines to control high-voltage circuit breakers has units for electrical isolation and prescaling of input signals in the form of current and voltage, frequency filters unit, analog-to-digital converter, microprocessor system for controlling output relay and signaling system in compliance with protection algorithm, and transceiver with antenna for relay protection, automatic control, measurements, oscillographic testing, recording, controlling, and checking connections. Microprocessor unit performs its functions dispensing with control board having keyboard and minidisplay and does not need organization of data exchange over radio link. EFFECT: reduced size and enhanced functional capabilities of device. 1 cl, 5 dwg