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4 Measurands and Recording
4.3 Display of Measurands
4.3.2
Measurands and Operational Measurement Uncertainty acc. to IEC 61557-12
Table 4-15 Measurands and their Operational Measurement Uncertainty
Measurands
Current I
Acc. to parameterization
Current unbalance I
unbal
Active power P
+ demand, - supply
Reactive power Q
inductive, capacitive
Apparent power S
1)
Power factor PF
Active power factor cos
1)
Phase angle
Active energy WP
+ demand, - supply
Reactive energy WQ
inductive, capacitive
Apparent energy WS
Subgroup Total harmonics
distortion of voltage THDS V
Subgroup Total harmonics
distortion of current THDS I
Harmonics of current H_xI
1)
Measurement from 2 % of the rated apparent power value onwards in the selected measuring range (see
Chapter 13.2)
66
Unit
Rated Value
A
AC 1 A
AC 5 A
%
-
W
-
var
-
VA
-
-
-
1)
-
-
Degree
-
Wh
-
varh
-
VAh
-
%
-
ph
%
-
ph
A
-
ph
Measurement
Range
20 % to 200 % I
0.2
rated
0 % to 100 % I
0.2
rated
20 % to 200 % I
0.5
rated
20 % to 200 % I
2
rated
20 % to 200 % I
0.5
rated
0.5 inductive to 0.8
1
capacitive
-1 to +1
±1 %
-180° to +180°
±2°
20 % to 200 % I
0.5
rated
Class 0.5S acc. to
IEC 62053-22
20 % to 200 % I
2
rated
Class 2 acc. to
IEC 62053-23
20 % to 200 % I
0.5
rated
0 % to 100 %
±0.5 %
0 % to 100 %
±0.5 %
-
Condition:
10 % I
I
m
Maximum error:
±5 % I
-------------------------------
Condition:
I
< 10 % I
m
Maximum error:
±0.5 % I
SICAM P850/P855, 7KG85xx, Device Manual
E50417-H1040-C482-A6, Edition 10.2018
Operat. Measurem.
Uncertainty
2)
2)
2)
2)
2)
rated
m
rated
rated
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