ABB REG316 4 Series Operating Instructions Manual page 382

ABB Switzerland Ltd
The following table shows scaling examples for the most impor-
tant measured function variables.
Function Meas. variable
UIfPQ f (50Hz)
UIfPQ P
UIfPQ Q
SynchroCheck degrees (180 ° )
Power PN
'MeasScale' is given by:
Processor capacity:
The disturbance recorder function runs on the same central
processing unit (CPU) as the protection functions. The processor
capacity required by the disturbance recorder function as a per-
centage of the total capacity and in relation to the number of sig-
nals is:
20% for 9 analogue and 0 binary signals
·
40% for 9 analogue and 16 binary signals.
·
The disturbance recorder function will thus be generally confined
to recording the analogue variables and be triggered by the gen-
eral start or general trip signals. Changes in the states of binary
signals are nevertheless registered by the event recorder.
Recording duration:
The time during which data are recorded can be determined
from the following relationship:
-
65535
=
t
rec
(2 a
where t : max. recording time
rec
n: Number of events recorded
a: Number of c.t. and v.t. channels recorded
b: Number of Bytes required for binary channels (one
Byte per eight binary signals)
p: duration of one cycle at power system frequency
(e.g. 20 ms for 50 Hz).
3-344
REG 316*4 1MRB520049-Uen / Rev. F
Nominal value 'MeasScale'
20000
820698
820698
31415
1641397
Nominal value
16535
+ ´
(( n 1 ) 22 )
´
p
+ ´
b ) 12
2
52
52
2
105
+
Margin