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MI408 Schematic ( PDF Datasheet ) - Iskra

Teilenummer MI408
Beschreibung Measuring Transducer
Hersteller Iskra
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Gesamt 2 Seiten
MI408 Datasheet, Funktion
MI408
Measuring transducer for AC current
FEATURES
Measuring of AC current
Low power consumption
Accuracy class: 0.5
Self - powered
Housing for DIN rail mounting
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Picture 2: Measuring transducer for AC current MI408
APPLICATION
Measuring transducer MI408 converts sinusoidal AC current
signal into proportional DC current signal. The analogue
output signal is appropriate for regulation of analog and
digital devices, computer inputs, processing and
electroenergetic systems, etc.
LAYOUT AND MODE OF OPERATION
According to the block diagram (Picture 1), the transformer
(A) serves for the galvanic separation between measuring
input and signal output as well as adaptation of the input signal
to the rectifier unit (B). In the low – pass filter (C) a signal
proportional to the input level will be achieved.
Picture 1: Block diagram
STANDARD VERSIONS
The following transducer versions are available as standard
versions (Table 1).
Input
current
(IN)
Nominal
frequency
(fN)
Output
signal
(0…IOutN)
0…5 mA
1A
50/60 Hz 0…10 mA
5A
0…20 mA
Table 1: Standard versions of MI406
Maximal
external resistance
(RBmax)
3 k
1.5 k
750
Transducers are self – powered, and are mounted on
standard rail 35 x 15 mm (according to DIN EN 50022).
TECHNICAL DATA
INPUT:
Input current, IN (meas. range end value):
Measuring range limit values
0…1 A to 0…7.5 A
Nominal frequency fN:
Frequency range:
50/60 Hz
45…65 Hz
Own consumption:
< 2 VA
Overload capacity:
according to EN 60688: 1992
Measured Number of
quantity applications
(IN)
1.2 x IN
20 x IN
5
Table 2: Overload capacity
Duration
of one
application
continuously
1s
Interval between
two successive
applications
300 s
ANALOG OUTPUT:
Current output, IOutN (out. range end value):
Output range values 0…5 mA, 0…10 mA or 0…20 mA
Burden voltage:
15 V
External resistance:
15V
RBmax.[k]= IOutN [mA]
Response time:
Residual ripple:
< 300 ms
< 1 % p.p.
ACCURACY:
Reference value:
Accuracy class:
Input end value
0.5
Reference conditions:
Ambient temperature:
15…30 °C
Input:
0…100 % IN
Connection:
low-voltage network: via current transformer PT 5 VA
high-voltage network:
via high-voltage current transformer PT 5 VA
POWER SUPPLY:
Power supply from measuring circuit.
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