Siemens SENTRON VL Series

3WL air circuit breakers
3.3 Metering functions
3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02
51
Table 3- 7 Metering function PLUS - Measured values for communication
Measured value Range of values Accuracy (when ordering the
switch + trip unit + metering
function PLUS direct)
1
Currents I
L1
/ I
L2
/ I
L3
, I
n
30 … 8000 A ± 1 %
Ground-fault current I
g
(measurement with external G
transformer)
100 … 1200 A ± 5 %
Phase-to-phase voltages V
L12
, V
L23
, V
L31
80 … 120% V
n
± 1 %
Star point voltages V
L1N
, V
L2N
, V
L3N
80 … 120% V
n
± 1 %
Instantaneous mean value of the phase-to-phase voltages
V
Llavg
80 … 120% V
n
± 1 %
Instantaneous means value of the star point voltages V
Lnavg
80 … 120% V
n
± 1 %
Apparent power S
L1
, S
L2
, S
L3
13 … 8000 kVA ± 2 %
Total apparent power S
total
13 … 24000 kVA ± 2 %
Active power P
L1
, P
L2
, P
L3
– 8000 … 8000 kW ± 2% (cos φ > 0.6)
Total active power P
total
– 24000 … 24000 kVA ± 2% (cos φ > 0.6)
Reactive power Q
L1
, Q
L2
, Q
L3
– 6400 … 6400 kvar ± 4% (cos φ > 0.6)
Total reactive power Q
total
– 20000 … 20000 kvar ± 4% (cos φ > 0.6)
Power factors cos φ
L1
, cos φ
L2
, cos φ
L3
– 0,6 … 1 … 0,6 ± 0,04
Power factors cos φ
avg
– 0,6 … 1 … 0,6 ± 0,04
Long-term mean value of currents I
L1
, I
L2
, I
L3
30 … 8000 A ± 1 %
Long-time mean value of 3-phase current 30 … 8000 A ± 1 %
Long-time mean value of active power P
L1
, P
L2
, P
L3
13 … 8000 kW ± 2% (cos φ > 0.6)
Long-time mean value of 3-phase active power 13 … 8000 kW ± 2% (cos φ > 0.6)
Long-time mean value of apparent power S
L1
, S
L2
, S
L3
13 … 8000 kW ± 2 %
Long-time mean value of 3-phase apparent power 13 … 8000 kW ± 2 %
Long-time mean value of 3-phase reactive power – 24000 … 24000 kvar ± 4% (cos φ > 0.6)
Active energy in normal direction 1 … 10000 MWh ± 2 %
Active energy in reverse direction 1 … 10000 MWh ± 2 %
Reactive energy in normal direction 1 … 10000 Mvarh ± 4 %
Reactive energy in reverse direction 1 … 10000 Mvarh ± 4 %
Frequency 15 … 440 Hz ± 0.1 Hz
THD for current and voltage 2 … 100 % ± 3% from the measuring range to
the 29th harmonic
Current and voltage phase unbalance 2 … 150 % ± 1 %
1
Accuracy is specified as follows: ± (x%) of the full-scale value + 2 LSD (least significant digit) for one year after
calibration; use of a Class 0.5 voltage transformer as well as connection of no more than 3 SENTRON WLs to this
voltage transformer.