I = 2..200A AC Current transducer AKR-B420L PN A Split Core transducer for the electronic measurement AC waveforms current, with galvanic isolation between the primary (High power) and the secondary circuits (Electronic circuit). Jumper selectable ranges and True RMS 4-20mA current output. Electrical data Features 1) VFD and SCR waveforms current Primary Nominal Current Analogue Output Signal Type RoHS measurement I (A.t.RMS) I (mA) Date Code PN OUT True RMS responding Split core box 2,5 4-20 AKR 5 B420L JUNE 2006 Current output 10,20,50 4-20 AKR 50 B420L planned Loop powered transducers 100,150,200 4-20 AKR 200 B420L planned Panel mounting Jumper selectable ranges Vc Supply voltage (Loop powered) 24 V DC R Load resistance see power supply diagram L V Rated voltage (CAT III, PD2) 150 V AC b Advantages V RMS Isolation voltage test, 50 Hz, 1mn 3 kV AC d f Frequency bandwith 10-400 Hz Large aperture High isolation between primary and Accuracy - Dynamic performance data secondary circuits Easy to mount X Accuracy I , T =25C 1 % PN A t Response time 90% of I < 600 mS r PN Applications General data VFD Controlled Loads: VFD output indicates how the motor and T Ambient operating temperature (0-95% RH) - 20 ..+ 50 C A attached load are operating. T Ambient storage temperature - 20 ..+ 85 C S SCR Controlled Loads: m Mass 120 g Acurate measurement of phase Safety IEC 61010-1 angle fired or burst fired (time EMC EN 61326 proportioned) SCRs. Switching Power Supplies and Electronic Ballasts: True RMS sensing 1) Note: For 4-20mA output model, no saturation output up to 23 mA. is the most accurate way to measure power supply or ballast Selecting the transducer input power. VFD (Variable Frequency Drive) and SCR (Semi Conductor Rectifier) output waveforms are rough approximations of a sine wave. There are numerous spikes Options on request and dips in each cycle. AKR transducers use a mathematical algorithm called True RMS, which integrates the actual waveform over time. True RMS is the only DIN mounting way to accurately measure distorted AC waveforms. Select AKR transducers for nonlinear loads or in noisy power environments. 060816/5 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Page 1/2 LEM www.lem.comDimensions AKR-B420L (unit : mm, 1mm = 0.0394 inch) 61 13 21.7 30 89.7 61 4.5 77.3 Mechanical characteristics Power Supply diagram General tolerance 1 mm Primary aperture 21.7 mm sq. Panel mounting 2 holes 4.5mm Distance between holes 77.3 mm Connections 2 x UNC8 Cylindric Head Remark Temperature of the primary conductor should not exceed 60C. 060816/5 Page 2/2 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM www.lem.com 3.2 13 21.7 57.2