Siemens SIP5C, Hardware Description

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SIPROTEC 5 Compact provides the process interfaces, buffers, recorders, and automation functions necessary
for monitoring equipment:
•
Process values are stored together with a time stamp in the operational log
•
The circuit-breaker statistics provide essential data for condition-based maintenance of switchgear
•
Process variables (for example, pressure, SF6 loss, speed, and temperature) are monitored for limit viola-
tions via measuring transducers connected to the sensors.
•
Using external temperature measuring devices that are connected via Ethernet, other measured values
can be captured and processed.
Monitoring power quality
Besides availability, the ultimate consumers demand also a high quality concerning the electrical energy
(power quality). This depends on process management and the responsibility of the power utilities and
consumers among other factors. The increasing use of power electronic components (for example, nonlinear
motor drives, renewable infeeds) can have loading effects on power quality. Switching operations in the elec-
trical power system can result in brief voltage dips. An inadequate power quality can lead to interruptions of
supply, damages, production outages, and high follow-up costs. Consequently, a reliable measurement of the
appropriate power quality features becomes more and more important.
SIPROTEC 5 Compact offers basic detection and recording of some power quality data with PQ Basic:
•
Voltage changes (overvoltage, dips, interruption) and voltage unbalance
•
Harmonic component voltages and currents, THD and TDD
Many applications do not require detections according to the most stringent PQ standards. PQ-Basic offers a
cost-effective, simple solution without having to install and operate additional power-quality devices. In this
way, you can quickly get an overview of your PQ status for the entire power system since all the installed
SIPROTEC 5 Compact devices can simply be upgraded via a firmware update without having to install addi-
tional hardware. You can then, for example, perceive trends and be warned if the power quality has reached
problematic limits at sensitive points. This can be used to detect weak points early so that corrective measures
can be taken.
If a detection and evaluation of the power-system quantities is necessary as per the entire scope of grid codes,
such as the EN 50160 standard, SIPROTEC 5 provides appropriate power quality recorders such as the
SIPROTEC 7KE85. A SICAM PQS system provides centralized data archiving and an elegant evaluation of the
weekly reports as per, for example, EN 50160, among others.
Forms of Devices and On-Site Operation Panels
2.1 Device Design
SIPROTEC 5 Compact, Hardware Description, Manual 21
C53000-G5300-C002-3, Edition 12.2021