Power Protection (P,Q), 3-Phase
Overview of Functions
The 3-phase power protection (P, Q) function (ANSI 32) is used to:
•
Detect whether the active or reactive power rises above or drops below a set threshold
•
Monitor agreed power limits and output warning indications
•
Detect both active and reactive power feedback in the power systems or on electric machines
•
Detect machines (motors, generators) running without load and output an indication to shut them down.
•
Be integrated into any automation solution, for example, to monitor very specific power limits (further
logical processing in CFC)
Structure of the Function
The 3-phase power protection (P, Q) function can be integrated in function groups, which provide measured
voltages and currents of the 3-phases for calculation of the power.
The 3-phase power protection (P,Q) function comes with one factory-set stage each for the active and the
reactive power. The following stages are preconfigured:
•
Power P>
•
Power Q>
•
Power P<
•
Power Q<
A maximum of 4 active power stages and 4 reactive power stages can be operated simultaneously in the func-
tion. The tripping stages have an identical structure.
[dw_GPP 3-phase structure, 2, en_US]
Figure 7-169 Structure/Embedding of the Function
Logical Combination of Output Signals
The operate indications of the active and reactive power stage(s) can be logically combined in CFC. When an
operate indication is present in both the active and the reactive power stage, an alarm indication is generated.
7.22
7.22.1
7.22.2
Protection and Automation Functions
7.22 Power Protection (P,Q), 3-Phase
852 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
To Next Page
Loading...
