Active Current Transformer Series WDI
AC/DC Open loop current transformers Description Open loop current transformers The WDI current sensor is an open-loop current transformer designed for measuring direct and alternating currents. The primary current generates a magnetic flux and this is evaluated by means of a magnetic circuit and Hall sensor in the air gap. The signal from the Hall sensor is processed by an electronic circuit and an exact representation of the primary current is output as a voltage. Advantages (electrical) Measurement of direct and alternating currents Voltage output Low power consumption No additional losses in the measuring circuit High-quality UL-listed insulating materials (e.g. UL94-V0 Safe electrically isolated primary and secondary circuits Good price/performance ratio Advantages (mechanical) Low weight Robust housing designs (for horizontal/vertical mounting) Connections: clamps, plugs, flat-cable plugs or cables Wide range of housings with various push-through openings Typical applications Industry, Renewable energy sources, Railway engineering, Energy, automation and building technology Technical specification Type 25 150 300 Primary rated current [A] ÎPN Peak 25 150 300 Max. Primary rated current [A] ÎmaxPN Peak 0- ± 30 0- ± 180 0- ± 360 Secondary current [mA] ÎoutPN ± 5 ± 5 ± 5 Min. Load resistance RBmin ± 15 Vdc ± 30A peak=2 ± 150 peak=2 ± 300 peak=2 . . . ± 180A peak=2 ± 360A peak=2 Max. Load resistance RBmax ± 15 Vdc ± 30A peak=10 ± 150 peak=2 ± 300 peak=2 . . . ± 180A peak=2 ± 360A peak=2 Max. Peak output voltage [V] ÜaN Peak ± 10 ± 10 ± 10 Operating voltage [Vdc] US ± 5% ± 15 ± 15 ± 15 No-load current [mA] IBO (@ ± 15 V) + loutpN 9 9 9 Insulation test voltage[kV] VP r.m.s. 50 Hz 3 3 3 Standing impulse voltage [kV] VW 1,2/50μs 3 5 5 Measuring accuracy 50 Hz [%] FU @IPN, TA=25°C ± 0,6 ± 0,6 ± 0,6 Linearity error [%] FLU @TA=25°C ≤ 1,0 ≤ 1,0 ≤ 1,0 Offset voltage [mV] Uo @IPN = 0, TA = 25°C 20 20 20 Drift offset voltage [mV] △Uo Io -25°C…+70°C 60 60 60 Temperature drift [%K] %/△T ≤ 0,05 ≤ 0,05 ≤ 0,05 Response time [μs] tr @ 90% von IPN < 25 < 25 < 25 Frequency range [kHz] f (-3 dB) DC … 10 (-3 dB) DC … 10 (-3 dB) DC … 10 Ambient temperature [°C] TA -25 to + 75 -25 to + 75 -25 to + 75 Storage temperature [°C] Ts -10 to + 85 -10 to + 85 -10 to + 85 Weight [kg] m 0,075 0,075 0,075 Creepage distance [mm] dCp 4 10 10 Air section [mm] dCpi 3 9 9 Dimensions in mm Type PIN-Conncetion / 4-pole h [mm] b [mm] b1/b2 [mm] t [mm] DL [mm] p/s [mm] a/a1 [mm] c1/c2 [mm] f [mm] e [mm] l [mm] WDI 25 A; O,-U; +U 39 39 – 26,5 10 – 3 x 10/6,5 25/6,5 M4 – 9 WDI 150 A; O,-U; +U 55 – 55/68 26 20,2 45/45 60/– 13/– 4,3 6,0 x 4,0 23 WDI 300 A; O,-U; +U 55 – 55/68 26 20,2 45/45 60/– 13/– 4,3 6,0 x 4,0 23 Data sheet Download our extensive catalog and discover many other REO products. Download Data sheet Certifications