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Introduction
7SV512
V1
C53000---G1176---C91
10
1.2
Features
--- Processor system with powerful 16---bit---micro-
processor;
--- Complete digital measured value processing and
control from data acquisition and digitizing of the
measured values up to the trip decisions for the
circuit breakers;
--- Complete galvanic and reliable separation of the
internal processing circuits from the measure-
ment, control and supply circuits of the system,
with screened analog input transducers, binary
input and output modules and DC converter;
--- Highly sensitive current detection;
--- Independent current detectors for monitoring of
current flow through each individual circuit break-
er pole;
--- 2-out-of-4 check of the current detectors;
--- Short reset time, negligible overshoot time;
--- Independent delay times for each circuit breaker
pole;
--- Single-stage or two-stage delay;
--- Can be controlled from circuit breaker auxiliary
contacts; if single-pole control is used, the individ-
ual auxiliary contacts of each pole, or series and
parallel connection of the auxiliary contacts can
be connected;
--- Can be initiated by single-pole or three-pole trip
commands;
--- Can be initiated by different protection relays,
even single-pole or three-pole or both;
--- Instantaneous trip possible in case of defective
circuit breaker;
--- Transmission of trip command to the remote end
possible;
--- Integrated end fault protection for intertrip;
--- Integrated circuit breaker pole discrepancy su-
pervision;
--- Calculation of operational measured values and
indication on the front display;
--- Simple setting and operation using the integrated
operation panel or a connected personal comput-
er with menu-guided software;
--- Communication with central control and storage
devices via serial interfaces is possible by means
of optical fibre;
--- Annunciation storage of the last three network
faults, with optional real time clock;
--- Data storage and transmission for fault records
giving
rapid fault analysis,
detailed fault records;
--- Counting of tripping commands as well as record-
ing of fault data and accumulative addition of the
interrupted fault currents;
--- Continuous self-monitoring right from the d.c. cir-
cuits, through the current and voltage transformer
inputs to the tripping relays, thus achieving maxi-
mum availability and a more corrective than pre-
ventive maintenance strategy.
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