Voltage transducer V PN = 1 V Ref: DV 1/SP For the electronic measurement of voltage: DC, AC, pulsed..., with galvanic isolation between the primary and the secondary circuit. Features Bipolar and isolated voltage measurement up to 18 V Current output Input cables for increased isolation, output on faston and M5 studs Footprint compatible with OV, CV4 series and LV -AW/ families. Advantages Low consumption and losses Compact design Good behaviour under common mode variations Excellent accuracy (offset, sensitivity, linearity) Response time 6 µs Low temperature drift High immunity to external interferences. Applications Single or three phases inverter Propulsion and braking chopper Propulsion converter Auxiliary converter High power drives Substations On-board energy meters. Standards EN 5155 EN 511-3- EN 514-1 Isolated plastic case material recognized according to UL 94-VO. Application Domain Traction (fix and onboard). Page 1/8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
DV 1/SP Absolute maximum ratings Parameter Symbol Value Maximum supply voltage (V P =,.1 s) ±34 V Maximum supply voltage (working) (-4.. 85 C) ±V C ±6.4 V Maximum input voltage (-4.. 85 C) 1.8 kv Maximum steady state input voltage (-4.. 85 C) V PN 1 V see derating on figure Absolute maximum ratings apply at 5 C unless otherwise noted. Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may degrade reliability. Isolation characteristics Parameter Symbol Unit Min Comment RMS voltage for AC isolation test 5/6Hz/1 min V d kv 18.5 1 % tested in production Maximum impulse test voltage (1./5 µs exponential shape) kv 3 Isolation resistance R IS MΩ measured at 5 V DC Partial discharge extinction voltage rms @ 1 pc V e V 5 Comparative tracking index CTI V 6 Clearance and creepage See dimensions drawing on page 8 Environmental and mechanical characteristics Parameter Symbol Unit Min Typ Max Ambient operating temperature T A C -4 85 Ambient storage temperature T S C -5 9 Mass m g 6 Standards EN 5155: 7 EN 511-3-: 6 EN 514-1: 1 Page /8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
DV 1/SP Electrical data DV 1/SP At T A = 5 C, ±V C = ±4 V, R M = 1 Ω, unless otherwise noted. Lines with a * in the conditions column apply over the -4.. 85 C ambient temperature range. Parameter Symbol Unit Min Typ Max Conditions Primary nominal voltage, rms V PN V 1 * Primary voltage, measuring range V PM A -18 18 * Measuring resistance R M Ω 133.3 * See derating on figure. For V PM < 18 V, max value of R M is given in figure 1 Secondary nominal current, rms I SN ma 5 * Output range I S ma -75 75 * Supply voltage ±V C V ±13.5 ±4 ±6.4 * Supply rise time (1-9%) ms 1 Current consumption @ V C = ±4 V I C ma + I S 5 + I S Offset current I O µa -5 5 1% tested in production Offset drift I OT µa -5-5 -3 5 5 3 * -5.. 7 C -5.. 85 C -4.. 85 C,1% tested in production Sensitivity G µa/v 41.667 5 ma for 1 V Sensitivity error ε G % -.. Thermal drift of sensitivity ε GT % -.5 -.8 -.8.5.8.8 * -5.. 7 C -5.. 85 C -4.. 85 C Linearity error ε L % -.1.1 * ±18 V range Overall accuracy X G % of V PN -.3 -.9-1. -1..3.9 1. 1. * 5 C; 1% tested in production -5.. 7 C -5.. 85 C, -4.. 85 C Output current noise, rms i no µa rms 14 1 Hz to 1 khz Reaction time @ 1 % of V PN t ra µs 1 Response time @ 9 % of V PN t r µs 48 6 to 1 V step, 6 kv/µs Frequency bandwidth BW khz 1 6.5 1.6 3 db 1 db.1 db Start-up time ms 19 5 * Primary resistance R 1 MΩ 3 * Total primary power loss @ V PN P W.6 * Page 3/8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
DV 1/SP Typical performance characteristics Maximum measuring resistance (Ohm) 5 4 3 1 T A = -4.. 85 C V C = ±13.5 to ±6.4 V 5 1 15 Measuring range (V) Minimum measuring resistance (Ohm) 1 9 8 7 6 5 4 3 1 Vc = ±4 V Vc = ±15 V T A = -4.. 85 C 5 1 15 Nominal input voltage (V) Figure 1: Maximum measuring resistance Figure : Minimum measuring resistance; For T A under 8 C, the minimum measuring resistance is Ω whatever V C Electrical offset drift (ua) 3 1-1 - -3 Max Typical Min -5-5 5 5 75 1 Ambient temperature ( C) Error (%) 1..8.4. -.4 -.8-1. Max Typical Min -5-5 5 5 75 1 Ambient temperature ( C) Figure 3: Electrical offset thermal drift Figure 4: Overall accuracy in temperature Sensitivity drift (%).8.6.4.. -. -.4 -.6 -.8 Max Typical Min -5-5 5 5 75 1 Input V P : 4 V/div Output I S : 1 ma/div Timebase: µs/div Ambient temperature ( C) Figure 5: Sensitivity thermal drift Figure 6: Typical step response ( to 1 V) Page 4/8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
DV 1/SP Typical performance characteristics (continued) 4 35 Typical supply current (ma) 35 3 5 15 1 5 T A = 5 C, V P = 5 1 15 5 3 Supply voltage (± V) Typical supply current (ma) 3 5 15 1 Vc = ±15 V 5 Vc = ±4 V -5-5 5 5 75 1 Ambient temperature ( C) Figure 7: Supply current function of supply voltage Figure 8: Supply current function of temperature Gain (db) 5-5 -1-15 - -5 M Phase (deg) 15 1 5-5 -1-15 -3 MSr 8-Jul-8 1:11:8 1 1 1 1 3 1 4 1 5 Frequency (Hz) Figure 9: Typical frequency response 1 1 1 1 3 1 4 1 5 Frequency (Hz) MSr 8-Jul-8 1:11:8.1 Frequency response Device: DV4/SP4, R M = 5 ohm Frequency response Device: DV4/SP4, R M = 5 ohm -.1 -. -.3-1 - -3 Gain (db) -.4 -.5 -.6 -.7 -.8 Phase (deg) -4-5 -6-7 -.9-8 -1 MSr 8-Jul-8 1:11:8 1 1 1 1 3 1 4 Frequency (Hz) Figure 1: Typical frequency response (detail) -9 MSr 8-Jul-8 1:11:8 1 1 1 1 3 1 4 Frequency (Hz) Page 5/8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
DV 1/SP Typical performance charateristics (continued) Input V P : 5 V/div Output I S : 5 µa/div Timebase: µs/div Input V P : 5 V/div Output I S : 5 µa/div Timebase: µs/div Figure 11: Typical common mode perturbation Figure 1: Detail of typical common mode perturbation (1 V step with 6 kv/µs R M = 1 Ω) (1 V step with 6 kv/µs, R M = 1 Ω) -9 Noise power density spectrum of V(R M ) Device: DV1/SP, R M = 5 ohm 1-4 RMS noise current at I M f c is upper cut off frequency of bandpass, low cut off freq is 1 Hz Device: DV1/SP -1 v n (dbvrms/rthz) -11-1 -13 I n (A) 1-5 1-6 -14-15 1 1 1 1 1 3 1 4 1 5 f (Hz) 1-7 1 1 1 1 1 3 1 4 1 5 f c (Hz) Figure 13: Typical noise power density of V (R M ) with R M = 5 Ω Figure 14: Typical total output current noise (rms) with R M = 5 Ω ( fc is upper cut off frequency of bandpass, low cut off frequency is 1 Hz) Linearity error (%) Device : DV1/SP.5..15.1.5 -.5 -.1 -.15 -. MSr 1-Sep-8 11:4:57 -.5 - -15-1 -5 5 1 15 Input voltage (V) Figure 13 (noise power density) shows that there are no significant discrete frequencies in the output. Figure 14 confirms that because there are no steps in the total output current noise that would indicate discrete frequencies (there is only a small step around 1.5 khz). To calculate the noise in a frequency band f1 to f, the formula is In(f1to f) = In(f) In(f1) with In(f) read from figure 14 (typical, rms value). Example: What is the noise from 1 to 1 Hz? Figure 14 gives In(1 Hz) =.3 µa and In(1 Hz) = 1µA. The output current noise (rms) is therefore Figure 15: Typical linearity error 6 6) (1 1 ) (.3 1 ) = 95µ V Page 6/8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
DV 1/SP Performance parameters definition The schematic used to measure all electrical parameters are: +VC + +HV IS RM VP M V This is the absolute maximum error. As all errors are independent, a more realistic way to calculate the error would be to use the following formula: error = ( error_ component) Figure 16: VP Figure 17: -HV standard characterization schematics for current output transducers (R M = 5 Ω unless otherwise noted) +HV -HV Isolation barrier Isolation barrier - + - standard characterization schematics for voltage output transducers (R M = 1 kω unless otherwise noted) M V VS -VC +VC -VC V Sensitivity and linearity To measure sensitivity and linearity, the primary voltage (DC) is cycled from V PM, then to -V PM and back to (equally spaced V PM /1 steps). The sensitivity G is defined as the slope of the linear regression line for a cycle between ± V PM. The linearity error ε L is the maximum positive or negative difference between the measured points and the linear regression line, expressed in % of the maximum measured value. Magnetic offset Due to its working principle, this type of transducer has no magnetic offset current I OM. Electrical offset The electrical offset current I OE is the residual output current when the input voltage is zero. The temperature variation I OT of the electrical offset current I OE is the variation of the electrical offset from 5 C to the considered temperature. For all the following explanations, the output currents I S, I O, I OT, etc. should be replaced by voltages for transducers with voltage output: V S, V O, V OT etc. Transducer simplified model The static model of the transducer at temperature T A is: I S = G V P + error In which error = I OE + I OT (T A ) + ε G G V P + ε GT (T A ) G V P + ε L G V PM I S G V P V PM T A I OE I OT (T A ) ε G : the secondary current (A) : the sensitivity of the transducer (A/V) : the voltage to measure (V) : the measuring range (V) : the ambient temperature ( C) : the electrical offset current (A) : the temperature variation of I O at temperature T A (A) : the sensitivity error at 5 C at temperature T A ε GT (T A ) : the thermal drift of sensitivity at temperature T A ε L : the linearity error Overall accuracy The overall accuracy X G is the error at ±V PN, relative to the rated value V PN. It includes all errors mentionned above. Response and reaction times The response time t r and the reaction time t ra are shown in the next figure. Both slightly depend on the primary voltage dv/dt. They are measured at nominal voltage. 1 % 9 % V P 1 % t ra t r Figure 18: response time t r and reaction time t ra I s t Page 7/8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
DV 1/SP Dimensions DV 1/SP (in mm.) Connection Mechanical characteristics General tolerance ± 1 mm Transducer fastening 4 M6 steel screws 4 washers ext. 18 mm Recommended fastening torque 5 Nm Connection of primary 1.5 mm cables Connection of secondary 6.3 x.8 mm fastons and M5 threaded studs Recommended fastening torque. Nm Remarks I S is positive when a positive voltage is applied on +HV. The transducer is directly connected to the primary voltage. The primary cables have to be routed together all the way. The secondary cables also have to be routed together all the way. Installation of the transducer is to be done without primary or secondary voltage present. Safety This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer s operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/ or cause serious damage. This transducer is a build-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected. Page 8/8 1June1/version 3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com