8. Complete set of defense cs(connecting switch) -110 kV, bcs(bus connecting switch )-110 kV on current principle with the function dbrs

The complete set of defense can consist of one or a few microprocessor devices and must realize next functions:

• four the step current directed protecting of a zero sequence from contactors;

• maximal current defense (MCD);

• fast-acting MCD (current pinch-off);

• defense at including on a damage;

• action on the three-phase disconnecting;

• freely programmable logic;

• presence of three-phase DBRS;

• internal recorder of events;

• oscillographic testing;

• energyindependent memory;

• measurings of current parameters;

• self-diagnostic of device;

• signaling about the state and functioning of device;

• groups of setpoints: no less 4th;

• synchronization from the outsourcing of exact time;

• support protocol of IEC 61850, and similarly presence of standard international protocols of exchange by information for integration in ACS;

Requirements to software part:

• liquid-crystal screen on a front panel;

• user-programmable light-emitting-diode indicators for signaling;

• front port of Ethernet (Rs232) for connection with a device;

• two back port`s with an optical fibre ethernet-interface for connection with ACS substations;

9. Complete set of automation of management a switch 110 kV with the functions dbrs, ari, fld (fixing of line disconnecting)

The complete set of management automation can consist of one or a few microprocessor devices and must realize next functions:

• Control of switching device (on - off);

• realization of the three-phase disconnecting of switch with starting DBRS;

• fixing of line disconnection (a function is FLD and FLI);

• control of good condition of current chains;

• control of good condition chains of tension (circuit-disconnection fault);

• freely programmable logic;

• free configuration of entrances/outputs of device;

• determination and reflection of current parameters of object;

• synchronization from the outsourcing of exact time;

• amount of groups of setpoints - no less 4th;

• operative blocking for a chart with one switch on joining;

• autoreclosing;

• internal recorder of events;

• oscillographic testing;

• energyindependent memory;

• measurings of current parameters;

• self-diagnostic of device;

• signaling about the state and functioning of device;

• support of protocol of IEC 61850, and also presence of standard international protocols of exchange by information for integration in ACS;

Requirements to software part:

• liquid-crystal screen on a front panel;

• user-programmable light-emitting-diode indicators for signaling;

• front port of Ethernet (Rs232) for connection with a device;

• two back port`s with an optical fibre ethernet-interface for connection with ACS substations;

10. Dbrs function

• reception to on phase or three-phase signals about the wearing-out of outside / inside defense in a time of existence of current in DBRS;

• repeated operating on disconnecting of switch (for a phase / three-phase) without a temporal hitch ("DBRS on itself");

• at starting DBRS from defense, presence of current more setpoint of wearing-out and completion of the set dwell, to form the output signals of the three-phase disconnecting of contiguous switches, prohibition ARI saying no and contiguous switches, to provide disconnecting and prohibition ARI of switches of opposite end of line or middle tension of AT-330/154 (330/110) kV.

• return of elements of dwells DBRS at the successful disconnecting of switches.