Siemens 7KT0310, Руководство пользователя, Страница: 6 / 21

6
SMART 7KT0310 Manual
Measured variables
Measured variable On display On communication
Voltage V
L-N
, V
L-L
● ●
Current
● ●
Neutral current
● ●
Frequency
● ●
Power factor
● ●
Active power
● ●
Reactive power
● ●
Apparent power
● ●
Active energy (Import, Export, Total)
● ●
Reactive energy (Import, Export, Total)
● ●
Apparent energy
● ●
Max demand (current) over set demand period
● ●
Max demand (active, reactive and apparent power) over set demand
period
● ●
Phase angle of 3 phases
● –
THD% (Current)
● ●
THD% (Voltage)
● ●
Individual harmonics (Current)
– ●
Individual harmonics (Voltage)
– ●
–
: Not there
●
: Available
Measuring accuracy
Measured variable Error limits
Voltage V
L-N
0.5% of Full scale (300V AC)
Voltage V
L-L
Full scale 0.5%
Current Phase Current: 0.5% of full scale
Neutral current: 1% of full scale
Frequency 0.1%
For L-N Voltage >20V,
For L-L Voltage >35V
Power factor 0.01 Digit
Active power 1%
Reactive power 1%
Apparent power 1%
Active energy Class 1 (as per IEC 62053-21)
Reactive energy Class 2 (as per IEC 62053-23)
Apparent energy 1%
Phase angle of 3 phases 1%
THD (Current) 1%
THD (Voltage) 1%
Harmonics (Current) 1%
Harmonics (Voltage) 1%
When measuring on external current transformers or voltage
transformers, the accuracy of the measurement depends on the
quality of the transformer.
IEC Standards
Description Standard
Energy accuracy IEC 62053-21 | Active energy
EMC requirements IEC 61326-1: 2012
Degree of protection test (IP) IEC 60529
Safety requirements IEC 61010-1:2010 and
IEC 61010-2-030:2010
Vibration and mechanical shock IEC 62052-11
Certifications
SMART 7KT multifunction meter conforms to IEC
standards, IPC electronics assembly standard and
RoHS