Specifications are subject to change without notice 1
Current and Voltage Controls
• 1-phase current metering transformer for
use with control relays types:
S 178, S 180, S 1821, S 1822, SM 115, SY 115, 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
Ordering Key
Type
Input current
Type Selection
Input current Type no.
5 AAC MI 5
20 AAC MI 20
100 AAC MI 100
500 AAC MI 500
voltage (0.4 - 4 Vp) is propor-
tional to measured current.
Input Specifications
MI 5 MI 20 MI 100 MI 500
Current range 0.5 - 5 AAC 2 - 20 AAC 10 - 100 AAC 50 - 500 AAC
Max. current (continuously) 20 AAC 50 AAC 250 AAC 750 AAC
Max. overload current (t = 30 s)
40 AAC 85 AAC 325 AAC 1000 AAC
Rated insulation voltage
Input-output 1000 VACrms 1000 VACrms 1000 VACrms 1000 VACrms
Overvoltage category IV (IEC 60664) IV (IEC 60664) IV (IEC 60664) IV (IEC 60664)
Pollution degree 3 (IEC 60664) 3 (IEC 60664) 3 (IEC 60664) 3 (IEC 60664)
Dielectric strength
Dielectric voltage 6 kVACrms 6 kVACrms 6 kVACrms 6 kVACrms
Rated impulse withstand volt. 12 kV (1.2/50 µs) 12 kV (1.2/50 µs) 12 kV (1.2/50 µs) 12 kV (1.2/50 µs)
Power consumption < 100 mW/5 A < 100 mW/20 A < 0.5 W/100 A < 6 W/500 A
MI 5 MI 20 MI 100 MI 500
Voltage output
(TA= 20°C, RL= 9.5 kΩ) 0.4 - 4 Vp0.4 - 4 Vp0.4 - 4 Vp0.4 - 4 Vp
Output impedance < 700 Ω< 200 Ω< 40 Ω< 10 Ω
Tolerance of output voltage
@ rated input current ± 5% ± 5% ± 5% ± 5%
Temperature variation ± 0.1% per °C ± 0.1% per °C ± 0.1% per °C ± 0.1% per °C
Rated insulation voltage (cable)
250 VACrms 250 VACrms 250 VACrms 250 VACrms
Current Transformer, 1-Phase AC
Types MI 5, MI 20, MI 100, MI 500
Output Specifications
MI 500