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7
7.3 Continuous Recorder
98
Digital Fault Recorder, SIMEAS R-PMU, Manual
E50417-H1076-C360-A5, Release 10.2012
7.3.3 Continuous Mean Value Recorder for RMS-values (CRR)
The continuous mean value recorder for rms values – Continuous RMS-value Recorder (CRR) –
stores the arithmetic mean of the fundamental component rms values of currents, voltages and
symmetrical components for every recording interval. The mean value is always calculated over
the complete averaging time.
Table 7-28 provides an exact overview of the values recorded by the DAUs depending on the
input connection.
The maximum recording time can be calculated using the following equation:
where:
t
max
= maximum recording time in days
R = averaging time in seconds
M = parameterized memory space in megabytes (MByte)
D = number of active VCDAUs, VDAUs and CDAUs
Table 7-27 CRR – summary of technical data
Recording time Continuously
Averaging times 1 s, 2 s, 5 s, 10 s, 30 s, 60 s, 120 s, 240 s, 300 s, 360 s,
480 s, 600 s
Usable DAUs VCDAU, VDAU, CDAU
Recorded values Fundamental component rms values, symmetrical
components
Table 7-28 Recorded values of the CRR
VCDAU VDAU CDAU
Star connection
V
L1
, V
L2
, V
L3
, V
N
V
1
, V
2
, V
0
I
L1
, I
L2
, I
L3
, I
N
I
1
, I
2
, I
0
V
L1-1
, V
L2-1
, V
L3-1
, V
N4
V
1-1
, V
2-1
, V
0-1
V
L1-2
, V
L2-2
, V
L3-2
, V
N8
V
1-2
, V
2-2
, V
0-2
I
L1-1
, I
L2-1
, I
L3-1
, I
N4
I
1-1
, I
2-1
, I
0-1
I
L1-2
, I
L2-2
, I
L3-2
, I
N8
I
1-2
, I
2-2
, I
0-2
Delta connection
V
L12
, V
L23
, V
L31
, V
4
V
1
, V
2
I
L1
, I
L2
, I
L3
, I
4,
I
1
, I
2
, I
0
V
L12-1
, V
L23-1
, V
L31-1
, V
4
V
1-1
, V
2-1
V
L12-2
, V
L23-2
, V
L31-2
, V
8
V
1-2
, V
2-2
, V
0-2
I
L1-1
, I
L2-1
, I
L3-1
, I
4
I
1-1
, I
2-1
I
L1-2
, I
L2-2
, I
L3-2
, I
8
I
1-2
, I
2-2
, I
0-2
Monophase V
L1
, V
L2
, V
L3
, V
L4
I
L1
, I
L2
, I
L3
, I
L4
V
L1
, V
L2
, V
L3
, V
L4
V
L5
, V
L6
, V
L7
, V
L8
I
L1
, I
L2
, I
L3
, I
L4
I
L5
, I
L6
, I
L7
, I
L8
t
max
R M
⋅
D
-------------
0.178
1
MByte
-----------------
⋅
=