ACTIVE CURRENT TRANSFORMER WDI SERIES
AC/DC Direct-Imaging Current Transformers (Open-Loop Converters) Description Direct-imaging current transformer (Open-Loop Converter) The WDI current sensor is a direct-imaging current transformer designed for measuring DC and AC currents. The primary current flow generates a magnetic flux, which is evaluated in the air gap by means of a magnetic circuit and Hall sensor. An electronic circuit processes the signal from the Hall sensor and outputs an exact image of the primary current with a voltage at the output. Advantages (Electrical) Measurement of DC and AC currents Voltage output low power consumption no additional losses in the measuring circuit high-quality insulation materials listed according to UL safe, electrically isolated primary and secondary circuits good value for money Advantages (Mechanical) low weight robust housing designs (horizontal/vertical mounting) Connections: terminals, plugs, flat connectors or cables Versatile housing options with different through-hole openings Typical Applications Industry, Renewable Energies, Railway Technology, Energy, Automation and Building Technology Technical data Type 25 150 300 Primary current [A] ÎPN Peak 25 150 300 Max. Primary 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 Impulse withstand 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% of 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 Clearance [mm] dCpi 3 9 9 Dimensions in MM Type PIN connection / 4-pin 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 Datasheet All data and configurations can be found in our product datasheet. Download Datasheet Certifications