AC/DC Current Transducer DHR-C420 I = 100 .. 1000 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 2) 500 1800 4-20 DHR 500 C420 ● Panel mounting 2) 600 1800 4-20 DHR 600 C420 ● Eliminates insertion loss 2) 1000 1800 4-20 DHR 1000 C420 ● Isolated plastic case recognized according to UL94-V0 R Load resistance < 300 W L V Supply voltage + 20 .. 50 V DC C Advantages I Current consumption 30 mA + I C OUT I Output current limitation < 25 mA ● Large aperture for cable up to SL Î Overload capability (Ampere Turns) 30000 A.t Ø32mm P ● High isolation between primary Performance data and secondary circuits ● Easy installation X Accuracy @ I , T = 25°C (excluding offset) < ± 1 % of I PN A PN Applications e Linearity error (1% of I .. ± I ) < ± 1.0 % of I L PN PN PN I Electrical offset current, T = 25°C 4 mA OE A ● VFD Controlled Loads TCI Temperature coefficient of I ( 0..+60 °C) ± 3.2 mA/K OE OE VFD output indicates how the (-40..+70 °C) ± 6.4 mA/K motor and attached load are TCI Temperature coefficient of I (% of reading) ± 0.1 %/K OUT OUT operating. t Response time to 90 % of I step < 150 ms r PN ● SCR Controlled Loads BW Frequency bandwidth (± 1 dB) DC 20..6000 Hz Acurate measurement of phase angle fired or burst fired (time General data proportioned) SCRs. Current measurement gives faster T Surrounding operating temperature - 40 .. + 70 °C A response than temperature T Surrounding storage temperature - 40 .. + 85 °C S measurement. m Mass 260 g ● Switching Power Supplies and IPxx Protection degree IP20 Electronic Ballasts True RMS sensing is the most accurate way to measure power 1) supply or ballast input power. Notes : The Max. Peak AC Current is the highest peak level of the primary signal that is taken into account for accurate True RMS calculation. Yet Application domain the device is designed for maximum continuous True RMS value equal to I , whereas the output is limited by the above specified output limitation. PN ● Energy and Automation 2) According to the UL 508 Standard for Safety for Industrial Control Equipment the primary current must not exceed 475 A.t.RMS through the transducer hole. Page 1/4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 100518/20 www.lem.com Current 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. 100518/20 www.lem.com Current Transducer DHR-C420 Safety and warning notes In order to guarantee safe operation of the transducer and to be able to make proper use of all features and functions, please read these instructions thoroughly! Safe operation can only be guaranteed if the transducer is used for the purpose it has been designed for and within the limits of the technical specifications. Ensure you get up-to-date technical information that can be found in the latest associated datasheet under www.lem.com. Caution! Risk of danger Ignoring the warnings can lead to serious injury and/or cause damage! The electric measuring transducer may only be installed and put into operation by qualified personnel that have received an appropriate training. The corresponding national regulations shall be observed during installation and operation of the transducer and any electrical conductor. The transducer shall be used in electric/electronic equipment with respect to applicable standards and safety requirements and in accordance with all the related systems and components manufacturers’ operating instructions. Caution! Risk of electrical shock When operating the transducer, certain parts of the module may carry hazardous live voltage (e.g. primary conductor, power supply). The user shall ensure to take all measures necessary to protect against electrical shock. The transducer is a built-in device containing conducting parts that shall not be accessible after installation. A protective enclosure or additional insulation barrier may be necessary. The transducer shall not be put into operation if the jaw opening is open (split core version) or the installation is not completed. Installation and maintenance shall be done with the main power supply disconnected except if there are no hazardous live parts in or in close proximity to the system and if the applicable national regulations are fully observed. Safe and trouble-free operation of this transducer can only be guaranteed if transport, storage and installation are carried out correctly and operation and maintenance are carried out with care. Page 3/4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 100518/20 www.lem.com Dimensions DHR-C420 (in mm. 1 mm = 0.0394 inch)   Dimensions DHR-C420 (in mm. 1 mm = 0.0394 inch)  25 70 60  6.80 22.28      90 4 15 7   • • •• • • • ••••••••••• 6 78 2NWIKPEQPPGEVQT •• •••• •••••••••• (-%564( •• •2 ••J •Q •G •P ••K ••Z • ••% ••QPVCEV DHR-C420 Connections Connections ● Wires up to Ø 2 mm DHR • Wires up to ∅ 2 mm ● Female connector provided (spring terminal blocks) • Female connector provided (spring terminal blocks) ● User-friendly spring-cage connection for no-tool direct • User-friendly spring-cage connection for no-tool conductor connection Output Connector direct conductor connection 1(Vcc) 2(Iout) 3(NC) 4(GND) Mechanical characteristics 24 VDC Power ● General tolerance ±1 mm Mechanical characteristics (+) ● Primary aperture Ø 32.0 mm • General tolerance ±1 mm ● Panel mounting 4 holes Ø 4.6 mm • Primary aperture ∅ 32.0 mm (-) ● Distance between holes 70.0 mm & 78 mm • Panel mounting 4 holes ∅ 4.6 mm (see above dimensions) • Distance between holes 70 mm & 78 mm For panel mounting, use M4 screws (not supplied) with (see above drawings) appropriate length to panel´s thickness, and tighten to (-) (+) For panel mounting, replace M4 screws by new one (not supplied) 0.75Nm +/-20% torque. Load with appropriate length to panel´s thickness. (Controller, meter etc) Remarks ● The temperature of the primary busbar can not exceed Remarks 90 °C. • The temperature of the primary conductor can not exceed 90 °C. + +2 24 4V VD DC C ● Dynamic performances are the best with a primary I Is s O OU UT T • Dynamic performances are the best with a primary conductor busbar completely filling the primary aperture. completely filling the primary aperture. ● This is a standard model. For different versions I Ip p • This is a standard model. For different versions (supply voltages, (supply voltages, different outputs, bidirectional GND GND GND different outputs, bidirectional measurement,...), please measurements...), please contact us. Page 4/4 contact us. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 100518/20 www.lem.com Page 4/4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 080725/16 www.lem.com  4.60     25  33.80 15 4.60   8.30 32 6.80    10 2.50  40 8.30 70  25.60