Current and Voltage Controls 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: 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 voltage (0.4 - 4 Vp) is proportional to measured current. MI 500 Type Input current Type Selection Input current Type no. 5 AAC 20 AAC 100 AAC 500 AAC MI 5 MI 20 MI 100 MI 500 Input Specifications Current range Max. current (continuously) Max. overload current (t = 30 s) Rated insulation voltage Input-output Overvoltage category Pollution degree Dielectric strength Dielectric voltage Rated impulse withstand volt. Power consumption MI 5 MI 20 MI 100 MI 500 0.5 - 5 AAC 20 AAC 40 AAC 2 - 20 AAC 50 AAC 85 AAC 10 - 100 AAC 250 AAC 325 AAC 50 - 500 AAC 750 AAC 1000 AAC 1000 VACrms IV (IEC 60664) 3 (IEC 60664) 1000 VACrms IV (IEC 60664) 3 (IEC 60664) 1000 VACrms IV (IEC 60664) 3 (IEC 60664) 1000 VACrms IV (IEC 60664) 3 (IEC 60664) 6 kVACrms 12 kV (1.2/50 s) 6 kVACrms 12 kV (1.2/50 s) 6 kVACrms 12 kV (1.2/50 s) 6 kVACrms 12 kV (1.2/50 s) < 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 0.4 - 4 Vp 0.4 - 4 Vp 0.4 - 4 Vp 0.4 - 4 Vp < 700 < 200 < 40 < 10 Output Specifications Voltage output (TA = 20C, RL = 9.5 k) Output impedance Tolerance of output voltage @ rated input current Temperature variation Rated insulation voltage (cable) 5% 5% 5% 5% 0.1% per C 0.1% per C 0.1% per C 0.1% per C 250 VACrms 250 VACrms 250 VACrms 250 VACrms Specifications are subject to change without notice 1 MI 5, MI 20, MI 100, MI 500 General Specifications Mode of Operation Ambient temperature Connection cable Weight The metered conductor is drawn through the central hole of the current metering transformer. Drawing the conductor through the hole several times makes it possible to meter currents below the nominal range. Material/colour Approval - 20 to + 60C (- 4 to + 140F) 2 m PVC, 2 x 0.25 mm2 MI 5, MI 20 70 g MI 100, MI 500 270 g ABS, light grey UL 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 Vp 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 2 MI 100, MI 500 Specifications are subject to change without notice