AC/DC Current Transducer DHR-C420 I = 100 .. 400 A PN The transducer for the electronic measurement of DC & distorted AC waveform currents, with galvanic isolation between the primary circuit (power) and the secondary circuit (measurement). True RMS 4-20 mA current output. Electrical data Primary Nominal Primary AC Current Output current Type 1) DC & AC Current Max. Peak Value Features I (A.t.RMS) I (A) I (mA DC) PN P OUT 100 600 4-20 DHR 100 C420 VFD and SCR waveforms current 200 600 4-20 DHR 200 C420 measurement 300 1000 4-20 DHR 300 C420 True RMS output 400 1000 4-20 DHR 400 C420 4-20 mA current output Panel mounting Eliminates insertion loss R Load resistance < 300 W L 2) Isolated plastic case recognized V Supply voltage + 20 .. 50 V DC C according to UL94-V0 I Current consumption 30 mA + I C OUT I Output current limitation < 25 mA SL Advantages Overload capability (Ampere Turns) 30000 A.t P Large aperture for cable up to Performance data 32mm High isolation between primary X Accuracy I , T = 25C (excluding offset) < 1 % of I and secondary circuits PN A PN e Linearity error (1% of I .. I ) < 1.0 % of I Easy installation L PN PN PN I Output current I =0, T = 25C 4 mA+/- I OUT P A OE Applications I Electrical offset current T = 25C < 1.0 % of I OE A PN TCI Temperature coefficient of I ( 0..+60 C) 3.2 mA/K OE OE VFD Controlled Loads (-40..+70 C) 6.4 mA/K VFD output indicates how the TCI Temperature coefficient of I (% of reading) 0.1 %/K OUT OUT motor and attached load are t Response time to 90 % of I step < 150 ms r PN operating. BW Frequency bandwidth ( 1 dB) DC 20..6000 Hz SCR Controlled Loads Acurate measurement of phase General data angle fired or burst fired (time proportioned) SCRs. Current T Surrounding operating temperature - 40 .. + 70 C A measurement gives faster T Surrounding storage temperature - 40 .. + 85 C S response than temperature m Mass 260 g measurement. IPxx Protection degree IP20 Switching Power Supplies and Electronic Ballasts True RMS sensing is the most 1) accurate way to measure power Notes : The Max. Peak AC Current is the highest peak level of the primary supply or ballast input power. signal that is taken into account for accurate True RMS calculation. Yet the device is designed for maximum continuous True RMS value equal to Application domain I , whereas the output is limited by the above specified output limitation. PN 2) According to the UL 508 Standard for Safety for Industrial Control Energy and Automation Equipment, the supply voltage must not exceed 42VDC. Page 1/4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 120426/21 www.lem.comCurrent Transducer DHR-C420 Isolation characteristics 3) V Rated isolation voltage rms 300 V b according to the standard IEC 61010-1 and with the following conditions: - Reinforced isolation - Over voltage category CAT III - Pollution degree PD2 - Heterogeneous field 4) V Rms voltage for AC isolation test , 50 Hz, 1min 4.0 kV d V 4) w Impulse withstand voltage , 1.2/50 uS 7.3 kV dCp Creepage distance 7.2 mm dCl Clearance distance 7.2 mm CTI Comparative tracking index (Group I) > 600 3) Notes : Between primary conductor voltage and ground. The voltage category could be improved according to the insulation characteristic given by the cable manufacturer. The UL 508 Standard for Safety for Industrial Control Equipment requires that only insulated conductors are used as primary circuit with this transducer. 4) Between primary (completely filling the aperture) and secondary. Transfer characteristics Output in mA 20 4 -Ipn +Ipn Page 2/4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 120426/21 www.lem.com