Properties Of The Fault Recorder - Siemens SIPROTEC 5 Manual

1.3

Properties of the Fault Recorder

The 7KE85 fault recorder is built on the flexible and powerful SIPROTEC 5 modular system and can thus also be
used universally in the scope of system solutions. The 7KE85 fault recorder is able to acquire extensive data,
such as measured values and sampled values (SAV), with high precision. It features a large number of analog
and binary inputs and a high sampling frequency. All data are recorded either by way of continuous criteria or
by way of different trigger criteria. Besides storing the data on internal mass storage, they can also transmit it
to central analysis systems. Consequently, you are able to monitor systems for typical characteristics.
The fault recorder continuously records on the one side via the trend recorder and the continuous recorder.
On the other side, the fault recorder records analog and binary data during a fault, for example, a change in
voltage, short circuits or ground faults, using the triggered fast-scan or slow-scan recorders. The 7KE85 fault
recorder captures this high-precision, time-stamped record, including calculated measurands (such as, for
example, power or frequency), for later evaluation. The evaluation is done after reading out from the device
through DIGSI 5 via SIGRA or via the powerful fault record and PQ data analysis system SICAM PQS/SICAM PQ
Analyzer. Recorded data is archived on internal mass storage to prevent data loss in case of a loss of supply
voltage. Recording of faults ensures long recordings with outstanding accuracy. The 7KE fault recorder
captures and processes the measurands and events according to the IEC 61000-4-30 and IEC 61000-4-15
standards.
Poor power quality can lead to a power failure. Effects on power quality consist of and are created chiefly by
large loads (for example, industrial processes), changes in the current network status (switching operations)
and by external effects (for example, lightning). Power quality standards (for example, EN 50160) are used to
specify limits for electric measurands within which connected devices operate properly without large power
losses. The fault recorder is used as a power quality recorder and evaluation device to show the power quality
of an electricity-supply system.
The fault recorder has the following properties:
•
Embedding in the SIPROTEC 5 family with:
- A consistent hardware concept
- Numerous expansion modules
- DIGSI 5 as configuration tool
- A broad selection of functionalities on the basis of function points
•
Fault recording and continuous recording for use in medium-, high-, and ultra high-voltage systems
(substations) and in power plants
1 x Fast-scan recorder
2 x Slow-scan recorder
5 x Continuous recorder
2 x Trend recorder
•
Event recorder for binary signals for monitoring of diverse components, such as circuit breakers, discon-
nectors, etc.
•
PMU communication acc. to IEEE C37.118 standard
•
IEC 61850 communication
•
Sampling frequencies can be set from 1 kHz to 16 kHz
•
Time synchronization via IRIG-B, DCF77, and SNTP
•
External mass storage (Siemens SDHC memory card only) with 16 GB
•
Flexible routing:
- Any desired routing of the measured values on each recorder
- Free combination of the measuring groups for the power calculation
•
Recorded quality code:
- Quality characteristic for each recorded value as well as display of this characteristic in SIGRA/SICAM PQ
Analyzer
•
Recording GOOSE signals
SIPROTEC 5, Fault Recorder, Manual
C53000-G5040-C018-5, Edition 11.2017
Introduction
1.3 Properties of the Fault Recorder
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