Frequency Measurement Fmmxu - ABB RELION SMU615 Technical Manual

1MRS758407 C
7.1.6.7 Technical revision history
Table 227: RESCMMXU Technical revision history
Technical revision
B
C
D
E
7.1.7

Frequency measurement FMMXU

7.1.7.1 Identification
Function description
Frequency measurement
7.1.7.2 Function block
Figure 126: Function block
7.1.7.3 Functionality
The frequency measurement range is 35...75 Hz. The measured frequencies outside
the measurement range are considered to be out of range and the minimum and
maximum values are then shown in parentheses.
When
Hz in a 50 Hz network and 12...90 Hz in a 60 Hz network. The measured frequencies
outside 35...75 Hz are shown in parentheses.
When the frequencies cannot be measured, for example, due to too low voltage
amplitude, the default value for frequency measurement can be selected with the
Def frequency Sel setting parameter. In the "Nominal" mode the frequency is set
to 50 Hz (or 60 Hz) and in "Zero" mode the frequency is set to zero and shown in
parentheses.
7.1.7.4 Signals
SMU615
Technical Manual
Frequency adaptivity is enabled, the measurement range is extended to 10...75
Change
-
Residual current angle and demand value
added to Monitored data view. Recorded da-
ta added for minimum and maximum values
with timestamps.
Monitored data Min demand Io maximum val-
ue range (RESCMSTA2.MinAmps.maxVal.f ) is
corrected to 40.00.
Internal improvement
IEC 61850 IEC 60617
identification identification
FMMXU f
Measurement functions
ANSI/IEEE C37.2
device number
f
203