SIPROTEC
®
4 Devices
4-2 7SA522 Manual
C53000-G1176-C119-2
4.1 General
The SIPROTEC
®
4 family is an innovative product series of numerical protective and
control devices with open communication interfaces for remote control and remote
setting, ergonomically designed operator panels, and highly flexible functionality.
4.1.1 Protection and Control
The devices utilize numerical measuring techniques. Complete numerical signal
processing offers high measurement accuracy and long-term consistency, as well as
reliable handling of harmonics and transients. Digital filtering techniques and adaptive
stabilization of measured values ensure the highest security in establishing the devic-
es’ correct responses. Device errors are recognized and quickly annunciated by inte-
grated self-monitoring routines. Failure of protection during a fault is therefore almost
entirely prevented.
You may choose devices with separate protective and process control functions, or
select a solution that implements both requirements.
The following solutions are available:
q
Protection and control in separate devices,
q
Protective devices that provide the capability of control of a circuit breaker or prima-
ry switching device through a communication interface,
q
Devices with combined features that, in addition to protective functions, offer on-site
operation for several circuit breakers and primary switching devices and extensive
substation control functions.
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