Woodward
Manual MRI3-ITER GB
46
DOK-TD-MRI3 ITERE Rev.A
7. Technical data
7.1 Measuring
circuits
Rated data:
Nominal current I
N
1 A or 5 A
Nominal
frequency
f
N
50/60 Hz adjustable
Power consumption in
current circuit:
at I
N
= 1 A
0.2 VA
at I
N
= 5 A
0.1 VA
Power consumption in
voltage circuit: <1 VA
Thermal withstand capability
in current circuit:
dynamic current withstand
(half-wave)
250
x
I
N
for
1
s
100
x
I
N
for
10
s
30
x
I
N
continuously
4
x
I
N
Thermal withstand capability
in voltage circuit:
continuously
1.5 x U
N
7.2 Common
data
Dropout to pickup ratio:
>97%
Dropout to pickup ratio for
phase current in range
0.2 x I
N
to 0.5 x I
N
:
=
100
%
Returning time: 30 ms
Time lag error class index E:
10 ms
Minimum operating time:
60 ms
Transient overreach at
instantaneous operation:
≥
5%
Permissible interruption of
the supply voltage without
influence on the function:
50 ms
Influences on the current measurement
Auxiliary voltage:
In the range 0.8 <U
H
/ U
HN
<1.2
no
additional
influences
can
be
measured.
Frequency:
in the range 0.9 <f / f
N
<1.1; <0.2% / Hz
Harmonics:
up to 20% of the third harmonic;
<0.08%
per
percent
of
the
third
harmonic
up
to
20%
of
the
fifth
harmonic;
<0.07%
per
percent
of
the
fifth
harmonic
Influences on delay times:
No additional influences can be measured.
For further technical data please refer to manual „MR-Multifunctional relays“.
