Table of Contents
Advertisement
Introduction
1.3 Characteristics
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 quan-
tities 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 trans-
former, 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 min./max. measured values (slave pointer function) and storage of long-term mean values
•
Recording of event and fault data for the last 8 system faults (fault in a network) with real-time informa-
tion as well as instantaneous values for fault recording for a maximum time range of 20 s
•
Constant monitoring of the measured quantities, as well as continuous self-diagnostics covering the
hardware 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
outputs, easy testing of port B, and influencing of information at port B during test operation.
Voltage Protection 27, 59
•
Three-element 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 of falling below (f<) and/or exceeding (f>) with 4 frequency limits and time delays that are
independently adjustable
•
Insensitive to harmonics and abrupt phase angle changes
•
Adjustable undervoltage threshold.
Load Restoration
•
4 separately adjustable load restoration stages
•
Individually assignable low frequency stages, which start the load restoration stage (1 to 4 for each load
restoration element)
•
Settable dropout ratio for all stages of the load restoration
•
Monitoring of the settable restoration cycles (no ON/OFF chattering)
20
SIPROTEC 4, 7RW80, Manual
C53000-G1140-C233-4, Edition 07.2018
Advertisement
Table of Contents
