Introduction
1.3 Characteristics
SIPROTEC, 7RW80, Manual
C53000-G1140-C233-1, Release date 10.2010
20
1.3
Characteristics
General Characteristics
• Powerful 32-bit microprocessor system.
• Complete digital processing and control of measured values, from the sampling of the analog input quanti-
ties to the initiation of outputs, for example, tripping or closing circuit breakers or other switchgear devices.
• Total electrical separation between the internal processing stages of the device and the external transformer,
control, and DC supply circuits of the system because of the design of the binary inputs, outputs, and the
DC or AC converters.
• Easy device operation through an integrated operator panel or by means of a connected personal computer
running DIGSI.
• Continuous calculation and display of measured and metered values on the front of the device.
• Storage of minimum and maximum measured values (slave pointer function)
• Recording of event and fault data for the last 8 system faults (fault in a network) with real-time information
as well as instantaneous values for fault recording for a maximum time range of 18 s.
• Constant monitoring of the measured quantities, as well as continuous self-diagnostics covering the hard-
ware and software.
• Communication with SCADA or substation controller equipment via serial interfaces through the choice of
data cable, modem, or optical fibers.
• Battery-buffered clock which can be synchronized via a synchronization signal at the binary input or via a
protocol.
• Statistics: Recording of the number of trip signals instigated by the device.
• Commissioning aids such as connection and direction check, status indication of all binary inputs and out-
puts, easy testing of port B and influencing of information at port B during test operation.
Voltage Protection 27, 59
• Three-stage undervoltage detection via the positive sequence system of the voltages, phase-to-phase or
phase-ground voltages
• Separate overvoltage detection of the voltages applied or detection of the positive or negative sequence
component of the voltages
• Settable dropout ratio for all elements of the undervoltage and overvoltage protection.
• User-defined characteristic
Frequency Protection 81 O/U
• Monitoring on underfrequency (f<) and/or overfrequency (f>) with 4 frequency limits and delay times that are
independently adjustable
• Insensitive to harmonics and abrupt phase angle changes
• Adjustable undervoltage threshold.
