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Outdoor three-phase load break switches<br />
SECTOS 24kV NXB and NXBD SF6 load break switch<br />
REC 523 control featu<strong>res</strong><br />
−−Remote monitoring and control from SCADA using SPA,<br />
LON, IEC870-1<strong>01</strong>, Modbus and DNP 3.0 protocols with one<br />
RS-485, two RS-232 serial and fibre optic communication<br />
ports<br />
−−Provides 15 digital inputs and 9 digital outputs including<br />
two power outputs<br />
−−9 analog inputs – 9 sensors CTs and VTs<br />
−−12V DC for powering communication devices<br />
−−21 freely configurable LED’s<br />
−−Reclosing functionality<br />
Metering<br />
−−Phase currents and phase to phase voltages<br />
−−Residual current and voltage<br />
−−Active and reactive power<br />
−−Active and reactive energy<br />
−−Demand values of current and power<br />
−−Frequency<br />
−−Power factor<br />
−−Harmonics<br />
−−Disturbance and event recording<br />
Condition monitoring<br />
−−Control circuit supervision<br />
−−Circuit breaker/disconnector<br />
condition monitoring<br />
−−SF6 p<strong>res</strong>sure of primary equipment<br />
−−Battery condition monitoring<br />
−−Battery deep discharge protection<br />
−−Operations counter for primary equipment<br />
−−Internal self-supervision of the unit<br />
Protection and fault indication capabilities<br />
−−Directional earth-fault protection; two stages (<strong>low</strong>-set and<br />
high-set)<br />
−−Three-phase directional overcurrent protection, two stages<br />
(<strong>low</strong>-set and high-set)<br />
−−Three-phase transformer inrush and motor startup current<br />
detector<br />
−−Non-directional earth-fault protection; two stages (<strong>low</strong>-set<br />
and high-set)<br />
−−Three-phase non-directional overcurrent protection, two<br />
stages (<strong>low</strong>-set and high-set)<br />
−−Three-phase under voltage protection; two stages (<strong>low</strong>-set<br />
and high-set)<br />
−−Circuit breaker failure protection<br />
ABB Medium Voltage Products | Outdoor three-phase load break switches 17
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