Siemens SICAM MMU 7KG9663, Руководство по эксплуатации устройства, Страница: 36 / 262

4 Measurands and Characteristics
4.2 Display of Measurands
36 SICAM MMU 7KG9663, Device Manual
E50417-H1040-C514-A3, Edition 01.2016
1) for operating condition valid
2) At reference conditions (see Chapter 13.2) are applicable from 0.1 to 1.2 x nominal range
3) Measurement from 2 % of the rated apparent power value onwards in the selected measuring range (see Chapter 13.2)
Active energy WP supply Wh - ±0.5 % ±0.5 %
Reactive energy WQ inductive varh - ±0.5 % ±0.5 %
Reactive energy WQ capacitive varh - ±0.5 % ±0.5 %
Apparent energy WS VAh - ±0.5 % ±0.5 %
Table 4-4 Measurands (cont.)
Measurands Unit Rated Value Operat. Measurem. Uncertainty
acc. to
IEC 61557-12
1)
acc. to
IEC 60688
2)
Table 4-5 Accuracy of the Frequency Measurement
Circuit Accuracy
Voltage to V
a-N
0 % to 15 % V
rated
: invalid
15 % to 30 % V
rated
: 40 mHz
30 % to 120 % V
rated
: 10 mHz
Voltage to V
b-N
0 % to 15 % V
rated
: invalid
15 % to 30 % V
rated
: 40 mHz
30 % to 50 % V
rated
: 30 mHz
50 % to 120 % V
rated
: 20 mHz
Voltage to V
c-N
0 % to 15 % V
rated
: invalid
15 % to 30 % V
rated
: 40 mHz
30 % to 120 % V
rated
: 10 mHz
NOTE
The frequency at measuring circuit V
a-N
is measured first. If the voltage V
a-N
is smaller than 30 % of V
rated
,
the measurement will automatically be carried out at measuring circuit V
c-N
. If the voltages V
a-N
and V
c-N
are
smaller than 30 % of V
nom
, the measurement will automatically be carried out at measuring circuit V
b-N
.
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