RZA of the station equipment of 6-35 kV of an ekr 211 0101

General information

The EKRA 211 0101 terminal is intended for use as protection, automatic equipment, control of the switch and the alarm system of the generator with a power up to 12 MW.

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Functions of protection

• differential current protection with braking -

• MTZ – three-stage maximum current protection against interphase damages -

• control of serviceability of chains of tension -

• ZNR – protection against the asymmetrical mode:

• on current of the return sequence -

• on asymmetry coefficient -

• ZOZZ – protection against single-phase short circuits on the earth:

• on tension of zero sequence -

• on current of zero sequence -

• ZMN – protection of the minimum tension -

• ZPN – protection against increase of tension -

• ZOM – protection of the return power -

• ZPV of BQ – protection against excitement loss (with a possibility of blocking from swings) -

• ZICh – protection against change of frequency -

• ZPR – protection of a rotor against overloads -

• ZPS – protection against a symmetric overload of a winding of the stator -

• ZDZ – protection against arc short circuits (reception and processing of commands from devices of arc protection):

• with control of current -

• without control of current -

• LZSh – logical protection of tires -

• TZOP – current protection of the return sequence -

• UROV – the device of reservation of failure of the switch with UROV current relay.

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Functions of automatic equipment

• disconnection from external chains.

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Functions of management

• AUV – automatic equipment of control of the switch:

• remote control from TP-ACS

• local management -

• blocking from repeated inclusions -

• control of chains of management -

• blocking from external chains.

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Functions of the alarm system

• accounting of a mechanical and switching resource of the switch.

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Structure of the device

• quantity of analog entrances – 11 (7 currents (1 for TTNP), 4 tension) -

• quantity of discrete entrances – 24-

• quantity of discrete exits – 24 (from them 2 switching, 2 two-contact).