Siemens SENTRON VL Series System Manual page 51

Table 3- 7 Metering function PLUS - Measured values for communication
Measured value
Currents I / I / I , I
L1 L2 L3 n
Ground-fault current I (measurement with external G
g
transformer)
Phase-to-phase voltages V
Star point voltages V , V
L1N
Instantaneous mean value of the phase-to-phase voltages
V
Llavg
Instantaneous means value of the star point voltages V
Apparent power S , S , S
L1 L2
Total apparent power S
total
Active power P , P , P
L1 L2 L3
Total active power P
total
Reactive power Q , Q , Q
L1 L2
Total reactive power Q
total
Power factors cos φ , cos φ
L1
Power factors cos φ
avg
Long-term mean value of currents I
Long-time mean value of 3-phase current
Long-time mean value of active power P
Long-time mean value of 3-phase active power
Long-time mean value of apparent power S
Long-time mean value of 3-phase apparent power
Long-time mean value of 3-phase reactive power
Active energy in normal direction
Active energy in reverse direction
Reactive energy in normal direction
Reactive energy in reverse direction
Frequency
THD for current and voltage
Current and voltage phase unbalance
Accuracy is specified as follows: ± (x%) of the full-scale value + 2 LSD (least significant digit) for one year after
1
calibration; use of a Class 0.5 voltage transformer as well as connection of no more than 3 SENTRON WLs to this
voltage transformer.
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
, V , V
L12 L23 L31
, V
L2N L3N
L3
L3
, cos φ
L2 L3
, I , I
L1 L2 L3
, P , P
L1 L2 L3
, S , S
L1 L2
Range of values
30 ... 8000 A
100 ... 1200 A
80 ... 120% V
n
80 ... 120% V
n
80 ... 120% V
n
80 ... 120% V
Lnavg n
13 ... 8000 kVA
13 ... 24000 kVA
– 8000 ... 8000 kW
– 24000 ... 24000 kVA
– 6400 ... 6400 kvar
– 20000 ... 20000 kvar
– 0,6 ... 1 ... 0,6
– 0,6 ... 1 ... 0,6
30 ... 8000 A
30 ... 8000 A
13 ... 8000 kW
13 ... 8000 kW
13 ... 8000 kW
L3
13 ... 8000 kW
– 24000 ... 24000 kvar
1 ... 10000 MWh
1 ... 10000 MWh
1 ... 10000 Mvarh
1 ... 10000 Mvarh
15 ... 440 Hz
2 ... 100 %
2 ... 150 %
3WL air circuit breakers
3.3 Metering functions
Accuracy (when ordering the
switch + trip unit + metering
function PLUS direct)
1
± 1 %
± 5 %
± 1 %
± 1 %
± 1 %
± 1 %
± 2 %
± 2 %
± 2% (cos φ > 0.6)
± 2% (cos φ > 0.6)
± 4% (cos φ > 0.6)
± 4% (cos φ > 0.6)
± 0,04
± 0,04
± 1 %
± 1 %
± 2% (cos φ > 0.6)
± 2% (cos φ > 0.6)
± 2 %
± 2 %
± 4% (cos φ > 0.6)
± 2 %
± 2 %
± 4 %
± 4 %
± 0.1 Hz
± 3% from the measuring range to
the 29th harmonic
± 1 %
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