Introduction
1-8
7SA6 Manual
C53000-G1176-C156-2
1.3 Features
• Powerful 32-bit microprocessor system.
• Complete digital processing of measured values and control, from the sampling and
digitilization of measured values to close and trip decisions for the circuit breaker.
• Complete galvanic and reliable separation between the internal processing circuits
of the 7SA6 and the external measurement, control, and DC supply circuits
because of the design of the analog input transducers, binary inputs and outputs,
and the DC converters.
• Complete scope of functions which are normally required for the protection of a line
feeder.
• Different pickup modes can be selected enabling the user to adapt the distance
protection system to different network conditions and his requirements.
• Polygonal tripping characteristics with separate setting along the X–axis (reach)
and R–axis (arc resistance reserve) and separate R–setting for earth faults.
• Direction determination is done with unfaulted loop (quadrature) voltages and
voltage memory, thereby achieving unlimited directional sensitivity.
• Compensation of the influence of a parallel line during earth faults is possible.
• Abundance of additional protective and control functions available, some as
options.
• Continuous calculation and display of measured quantities on the front of the
device.
• Simple device operation using the integrated operator panel or by means of a
connected personal computer running DIGSI
®
4.
• Storage of operational data, fault data, and oscillographic fault records with SER
information to be used for analysis and troubleshooting.
• Communication with central control and data storage equipment via serial
interfaces through the choice of data cable, modem, or optical fibers, as an option.
• Constant monitoring of the measurement quantities, as well as continuous self-
diagnostics covering the hardware and software.
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