28
BST
Response time for BS
ϕ
Phase-shift between current and voltage
F
Frequency of the input variable
Fn
Rated frequency
P
Active power of the system P = P1 + P2 + P3
P1
Active powerphase 1
(phase-to-neutral L1 – N)
P2
Active power phase 2
(phase-to-neutral L2 – N)
P3
Active power phase
(phase-to-neutral L3 – N)
Q
Reactive power of the system
Q = Q1 + Q2 + Q3
Q1
Reactive power phase 1
(phase-to-neutral L1 – N)
Q2
Reactive power phase 2
(phase-to-neutral L2 – N)
Q3
Reactive power phase 3
(phase-to-neutral L3 – N)
S
Apparent power of the system
S1
Apparent power phase 1
(phase-to-neutral L1 – N)
S2
Apparent power phase 2
(phase-to-neutral L2 – N)
S3
Apparent power phase 3
(phase-to-neutral L3 – N)
Sr
Rated value of the apparent power of the
system
PF
Active power factor cos
ϕ
= P/S
PF1
Active power factor phase 1 P1/S1
PF2
Active power factor phase 2 P2/S2
PF3
Active power factor phase 3 P3/S3
QF
Reactive power sin
ϕ
= Q/S
QF1
Reactive power factor 1 Q1/S1
QF2
Reactive power factor 2 Q2/S2
QF3
Reactive power factor 3 Q3/S3
LF
Power factor of the system
LF = sgnQ · (1 –
|
PF
|
)
LF1
Power factor phase 1
sgnQ1 · (1 –
|
PF1
|
)
LF2
Power factor phase 2
sgnQ2 · (1 –
|
PF2
|
)
LF3
Power factor phase 3
sgnQ3 · (1 –
|
PF3
|
)
c
Factor for the intrinsic error
R
Output load
Rn
Rated burden
H
Power supply
Hn
Rated value of the power supply
CT
c.t. ratio
VT
v.t. ratio
Measuring input
Waveform: Sinusoidal
Rated frequency:
50 or 60 Hz
Consumption [VA] (with
external power supply): Voltage circuit: U
2
/ 400 kΩ
Current circuit: ≤ I
2
· 0.01 Ω
Thermal rating of inputs
Input variable Number
of
inputs
Duration
of
overload
Interval
between two
overloads
Current
circuit
400 V single-phase AC system
693 V three-phase system
12 A
–––
continu.
–––
120 A
10
1 s
100 s
120 A
5
3 s
5 min.
250 A
1
1 s
1 hour
Voltage circuit
480 V/831 V
1
–––
contin.
–––
600 V/1040 V
1
10
10 s
10 s
800 V/1386 V
1
10
1 s
10 s
1
Maximum 264 V across the power supply when it is obtained
from the measured variable with a power supply unit for
85 - 230 V DC/AC and maximum 69 V with a power supply
unit for 24 - 60 V DC/AC.
Analog outputs
For the outputs A, B and C:
Output
variable Y
Impressed
DC current
Impressed
DC voltage
Full scale Y2
1 ≤ Y2 ≤ 20 mA
5 ≤ Y2 ≤ 10 V
Limits of output
signal for input
overload
and/or
R = 0
1.2 · Y2
40 mA
R
→ ∞
30 V
1.2 Y2
Rated useful
range of output
lead
0 ≤
7.5 V
≤
15 V
Y2
Y2
Y2
≤
Y2
≤
∞
2 mA
1 mA
AC component
of output signal
(peak-to-peak)
≤ 0.02 Y2
≤ 0.02 Y2
The outputs A, B and C may be either short or open-circuited.
They are electrically insulated from each other and from all
other circuits (fl oating).
All the full-scale output values can be reduced subsequently
using the programming software, but a supplementary error
results.