Siemens Sicam P850 7KG85 Series - Measurands and Operational Measurement Uncertainty Acc. to IEC 61557-12

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