Siemens SENTRON 3WL10 - Page 85

Description
2.8 Electronic trip unit ETU
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
83
Metering functions of the ETUs of the 6-series
Instantaneous values
Measured values
Precision
Reference standard: IEC 61557-12
Metering module
MF required
Currents (rms value)
A
L1, L2, L3, N
1%, class 1
—
Ground fault current
A
I
g
2%
—
Phase-to-phase voltage (rms value)
V
U12, U23, U31
0.5%
●
Phase-to-neutral voltage (rms value)
V
U1, U2, U3
0.5%
●
Phase sequence
—
—
●
Frequency
Hz
f
0.2%
●
Active power
kW
P1, P2, P3, P
tot
2%
●
Reactive power
kvar
Q1, Q2, Q3, Q
tot
2%
●
Apparent power
kVA
S1, S2, S3, S
tot
2%
●
Power factor (p.f.)
L1, L2, L3, N
2%
●
Peak factor
total
—
●
Counter
(recorded since installation or last reset)
Measured values
Precision
Metering module
MF required
Active energy kWh E
p
total
E
p
drawn
E
p
consumed
2% ●
Reactive energy kvarh E
q
total
E
q
drawn
E
q
consumed
2% ●
Apparent energy
kVAh
E
s
total
2%
●
Measuring interval memory of the individual parameters for each interval with a time stamp
Measured value
Clocking
Monitoring period
Metering module
MF required
Current: smallest and largest
A
I
min
, I
max
Fixed or syn-
chronizable via
test device
Duration: 5 to
120 min
Number of inter-
vals: 24
—
Phase-to-phase voltage: smallest
and largest
V U
min
, U
max
●
Active power: mean and largest
kW
P
mean
, P
max
●
Reactive power: mean and largest
kvar
Q
mean
, Q
max
●
Apparent power: mean and largest
kVA
S
mean
, S
max
●
Data log
- can be analyzed with the freely available powerservice software
4)
Recording and storage of measured values with high-resolution sampling rate (buffer memory)
Measured values
Metering module
MF required
Currents
A
L1, L2, L3, N, I
g
—
Voltages
V
U12, U23, U31
●