Monitoring Relays
Current Transformer, 1-Phase AC
Types MI 5, MI 20, MI 100, MI 500
• 1-phase current metering transformer for
use with control relays types:
DUA01, PUA01, DIB02, PIB02, DIC01, PIC01, DWA01,
PWA01, DWB01, PWB01, DWB02, PWB02, DWB03,
PWB03, S 180, H 479
• Measuring ranges:
MI 5:
0.5 -
5 AAC
MI 20: 2 - 20 AAC
MI 100: 10 - 100 AAC
MI 500: 50 - 500 AAC
Product Description
AC current transformers for
5, 20, 100, 500 AAC. Output
voltage (0.4 - 4 Vp) is propor-
tional to measured current.
Ordering Key
Type
Input current
MI 500
Type Selection
Input current
5 AAC
20 AAC
100 AAC
500 AAC
Type no.
MI 5
MI 20
MI 100
MI 500
Input Specifications
MI 5
Current range
Max. current
(continuously)
Max. overload current
(t = 30 s)
Frequency range
Rated insulation voltage
Input-output
Overvoltage category
Dielectric strength
Dielectric voltage
Rated impulse withstand volt.
Power consumption
0.5 - 5 AAC
20 AAC
40 AAC
40 Hz-1 kHz
1000 VAC
rms
IV (IEC 60664)
6 kVAC
rms
12 kV (1.2/50 µs)
< 100 mW/5 A
MI 20
2 - 20 AAC
50 AAC
85 AAC
40 Hz-1 kHz
1000 VAC
rms
IV (IEC 60664)
6 kVAC
rms
12 kV (1.2/50 µs)
< 100 mW/20 A
MI 100
10 - 100 AAC
250 AAC
325 AAC
40 Hz-1 kHz
1000 VAC
rms
IV (IEC 60664)
6 kVAC
rms
12 kV (1.2/50 µs)
< 0.5 W/100 A
MI 500
50 - 500 AAC
750 AAC
1000 AAC
40 Hz-1 kHz
1000 VAC
rms
IV (IEC 60664)
6 kVAC
rms
12 kV (1.2/50 µs)
< 6 W/500 A
Output Specifications
MI 5
Output Voltage
(T
A
= 20°C, R
L
= 9.5 kΩ)
Output impedance
Tolerance of output voltage
@ rated input current
Temperature variation
Rated insulation voltage
(cable)
0.4 - 4 V
p
< 700
Ω
± 5%
± 0.1% per °C
250 VAC
rms
MI 20
0.4 - 4 V
p
< 200
Ω
± 5%
± 0.1% per °C
250 VAC
rms
MI 100
0.4 - 4 V
p
< 40
Ω
± 5%
± 0.1% per °C
250 VAC
rms
MI 500
0.4 - 4 V
p
< 10
Ω
± 5%
± 0.1% per °C
250 VAC
rms
Specifications are subject to change without notice (06.06.13)
1
MI 5, MI 20, MI 100, MI 500
General Specifications
Pollution degree
Ambient temperature
Housing
Dimensions
MI 5, MI 20
MI 100, MI 500
Material
Weight
MI 5, MI 20
MI 100, MI 500
Connection cable
MI 5, MI 20
MI 100, MI 500
Approval
CE-marking
3 (IEC 60664)
- 20° to + 60°C (- 4° to + 140°F)
52 x 45 x 16 mm
95 x 67.5 x 20 mm
ABS
70 g
270 g
1 m, 2 x 0.25 mm
2 m, 2 x 0.25 mm
2
UL
Yes
2
Mode of Operation
The metered conductor is
drawn through the central
hole of the current metering
transformer. Drawing the con-
ductor through the hole sev-
eral times makes it possible
to meter currents below the
nominal range.
If the conductor is drawn
through the central hole e.g. 5
times, the metering trans-
former will register 50 A when
the current in the conductor
is 10 A.
In amplitude and phase the
output voltage is proportional
to the phase current metered.
4 V
p
will then be equal to
the rms-value of the nomi-nal
phase current.
Wiring Diagrams
Motor/generator
black
Latch/
hysteresis
black
Power supply
S 178
Power supply
S 1822
Dimensions
MI 5, MI 20
MI 100, MI 500
2
Specifications are subject to change without notice (06.06.13)
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