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Functions of the device: · Two (three) phase MTZ with independent endurance of time (directed or not directed). For the directed protection see the "Additional Block of the Direction of Power (BDP)" appendix · A current cut-off 3 steps: TO1, TO2, the TO3 (directed or not directed). · Protection against short circuits on the earth on current (ZNZ) 2 steps: ZNZ1, ZNZ2 · Acceleration of MTZ at turning on of the switch · Remote turning on and shutdown of the switch on a local network · External blocking of protection of input and SV at start-up of MTZ of the departing accessions of section · Logical protection of tires (blocking THAT on input and SV) combined with UROV (removal of the blocking signal at operation of protection of accessions on shutdown · Measurement of currents of phases and current of ZNZ · Storing of current of KZ (8 events with fixing of current and time of KZ) · Port of communication of RS 485 for connection to a local network.
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The microprocessor device of relay protection for own needs of power plants and electric motors
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