For the electronic measurement of voltage: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit.
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1 Voltage transducer DV 64 V P N = 64 V For the electronic measurement of voltage: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. Features Bipolar and insulated measurement up to 95 V Current output Footprint compatible with OV, CV 4 and LV 2-AW/2 families Primary input on M5 threaded studs Secondary output on Faston and M5 threaded studs + Safety nuts Primary on the top. Advantages Low consumption and low losses Compact design Good behavior 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 phase inverters Propulsion and braking choppers Propulsion converters Auxiliary converters High power drives Substations On-board energy meters Energy metering. Standards EN 5155: 27 EN : 217 EN : 215. Application Domain Traction (fixed and onboard). N 97.F Page 1/8
2 DV 64 Absolute maximum ratings Parameter Symbol Unit Value Comment Maximum supply voltage (V P = V,.1 s) ±U C max V ±34 Maximum supply voltage (working) ( 4 7 C) ±U C max V ±26.4 Maximum primary voltage ( 4 7 C) V P max V 95 Maximum steady state primary voltage ( 4 7 C) V P N max V 64 Absolute maximum ratings apply at 25 C unless otherwise noted. Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may degrade reliability. Insulation coordination Parameter Symbol Unit Value Comment RMS voltage for AC insulation test, 5 Hz, 1 min U d kv % tested in production Impulse withstand voltage 1.2/5 µs Û W kv 3 Partial discharge extinction RMS 1 pc U e V 75 Insulation resistance R INS MΩ 2 measured at 5 V DC Clearance (pri. - sec.) d CI mm Creepage distance (pri. - sec.) d Cp mm Case material - - see dimensions drawing on page 8 V according to UL 94 Comparative tracking index CTI 6 Shortest distance through air Shortest path along device body Environmental and mechanical characteristics Parameter Symbol Unit Min Typ Max Ambient operating temperature T A C 4 7 Ambient storage temperature T S C 5 85 Mass m g 62 Page 2/8
3 DV 64 Electrical data At T A = 25 C, U C = ±24 V, R M = 1 Ω, unless otherwise noted. Lines with a * in the conditions column apply over the 4 7 C ambient temperature range. Parameter Symbol Unit Min Typ Max Conditions Primary nominal RMS voltage V P N V 64 * Primary voltage, measuring range V P M V * Measuring resistance R M Ω 133 * For V P M < 95 V, max value of R M is given on figure 1 Secondary nominal RMS current N ma 5 * Secondary current ma * Supply voltage ±U C V ±13.5 ±24 ±26.4 * Rise time of U C (1-9 %) t rise ms 1 Current U C = ± 24 V at V P = V I C ma Offset current I O μa % tested in production Temperature variation of I O I O T µa * 25 7 C 4 7 C, 1 % tested in production Sensitivity G µa/v ma for 64 V Sensitivity error ε G % C Thermal drift of sensitivity ε G T % C * Linearity error ε L % of V P M.1.1 * ±95 V range Overall accuracy X G % of V P N * 25 C; 1 % tested in production 25 7 C 4 7 C Output RMS noise current I no μa 1 1 Hz to 1 khz Reaction 1 % of V P N t ra μs 21 Response 9 % of V P N t r μs 48 6 to 64 V step, 6 kv/µs Frequency bandwidth BW khz Start-up time t start ms * Resistance of primary (winding) R P MΩ 23 * Total primary power V P N P P W.77 * db 1 db.1 db Definition of typical, minimum and maximum values Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values shown in typical graphs. On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower limits and a probability for measured values to lie within this interval. Unless otherwise stated (e.g. 1 % tested ), the LEM definition for such intervals designated with min and max is that the probability for values of samples to lie in this interval is %. For a normal (Gaussian) distribution, this corresponds to an interval between 3 sigma and +3 sigma. If typical values are not obviously mean or average values, those values are defined to delimit intervals with a probability of %, corresponding to an interval between sigma and +sigma for a normal distribution. Typical, maximal and minimal values are determined during the initial characterization of a product. Page 3/8
4 DV 64 Typical performance characteristics Maximum measuring resistance (Ohm) T A = C U C = ±13.5 to ±26.4 V Electrical offset drift (ua) Max 75 Typical 5 Min Measuring range (V) Ambient temperature ( C) Figure 1: Maximum measuring resistance Figure 2: Electrical offset thermal drift Overall accuracy (%) Max Typical Min Sensitivity drift (%).8 Max.6 Typical.4 Min Ambient temperature ( C) Ambient temperature ( C) Figure 3: Overall accuracy in temperature Figure 4: Sensitivity thermal drift V P Input V P : 128 V/div Output : 1 ma/div Timebase: 2 µs/div Figure 5: Typical step response ( to 64 V) Page 4/8
5 DV 64 Typical performance characteristics 4 35 Typical supply current (ma) T A = 25 C, V P = Typical supply current (ma) U C = 15 V 5 U C = 24 V Supply voltage (± V) Ambient temperature ( C) Figure 6: Supply current function of supply voltage Gain (db) MSr 8-Jul-28 1:11: Frequency (Hz) Figure 7: Supply current function of temperature Phase (deg) M MSr 8-Jul-28 1:11: Frequency (Hz) Gain (db) Frequency response Device: DV42/SP4, R M = 5 ohm Figure 8: Typical frequency response Phase (deg) Frequency response Device: DV42/SP4, R M = 5 ohm -1-9 MSr 8-Jul-28 1:11:8 MSr 8-Jul-28 1:11: Frequency (Hz) Frequency (Hz) Figure 9: Typical frequency response (detail) Page 5/8
6 DV 64 Typical performance characteristics continued Input V P : 27 V/div Output : 5 µa/div Timebase: 1 µs/div Input V P : 27 V/div Output : 5 µa/div Timebase: 2 µs/div Figure 1: Typical common mode perturbation Figure 11: Detail of typical common mode perturbation (64 V step with 6 kv/µs R M = 1 Ω) 64 V step with 6 kv/µs, R M = 1 Ω) Device: DV42/SP4, R M = 5 ohm Device: DV12/SP e no (dbvrms/hz 1/2 ) I no (A) f (Hz) f c (Hz) Figure 12: Typical output RMS noise voltage spectral density Figure 13: Typical total output RMS noise current with R M = 5 Ω with R M = 5 Ω (f c is upper cut-off frequency of band low cut off frequency is 1 Hz) Linearity error (% of 6 kv).3%.2%.1%.% -.1% -.2% -.3% Figure 12 (output RMS noise voltage density) shows that there are no significant discrete frequencies in the output. Figure 13 confirms the absence of steps in the total output RMS noise current that would indicate discrete frequencies. To calculate the noise in a frequency band f1 to f2, the formula is: 2 2 I no (f1 to f2) = I no (f2) I no (f1) with I no (f) read from figure 13 (typical, RMS value). Example: What is the noise from 1 to 1 Hz? Figure 13 gives I no (1 Hz) =.32 µa and I no (1 Hz) = 1 µa. The output RMS current noise is therefore. Primary voltage (V) (1 1 6 ) 2 ( ) 2 =.95 µa Figure 14: Typical linearity error Page 6/8
7 The schematic used to measure all electrical parameters are: Performance parameters definition Sensitivity and linearity DV 64 Figure 15: standard characterization schematics for current output transducers (R M = 5 Ω unless otherwise noted) Transducer simplified model The static model of the transducer at temperature T A is: = G V P + ε In which ε = I O E + I O T (T A ) + ε G G V P + ε G T (T A ) G V P + ε L G V P M V P +HV -HV Isolation barrier : secondary current (A) G : sensitivity of the transducer (µa/v) V P : primary voltage (V) V P M : primary voltage, measuring range (V) T A : ambient operating temperature ( C) I O E : electrical offset current (A) I O T (T A ) : temperature variation of I O at temperature T A (µa) ε G : sensitivity error at 25 C ε G T (T A ) : thermal drift of sensitivity at + - M R M +U C V U C To measure sensitivity and linearity, the primary voltage (DC) is cycled from to V P M, then to V P M and back to (equally spaced V P M /1 steps). The sensitivity G is defined as the slope of the linear regression line for a cycle between ±V P M. 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. Electrical offset The electrical offset current I O E is the residual output current when the input voltage is zero. The temperature variation I O T of the electrical offset current I O E is the variation of the electrical offset from 25 C to the considered temperature. Overall accuracy The overall accuracy X G is the error at ± V P N, relative to the rated value V P N. It includes all errors mentioned above. Response and reaction times The response time t r and the reaction time t ra are shown in the next figure. Both depend on the primary voltage dv/dt. They are measured at nominal voltage. ε L temperature T A : linearity error 1 % 9 % 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: V P t r 1 % ε = N ii =1 2 ε ii t ra t Figure 16: response time t r and reaction time t ra Page 7/8
8 DV 64 Dimensions (in mm) d CI d Cp Connection +U C R M U C Mechanical characteristics General tolerance ±1 mm Transducer fastening 4 M6 steel screws 4 washers ext. 18 mm Recommended fastening torque 5 N m Connection of primary M5 threaded studs Recommended fastening torque 2.2 N m Connection of secondary 6.3 x.8 mm Faston and M5 threaded studs Recommended fastening torque 2.2 N m Safety This transducer must be used in limited-energy secondary circuits according to IEC 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. Remarks 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 Installation of the transducer must be done unless otherwise specified on the datasheet, according to LEM Transducer Generic Mounting Rules. Please refer to LEM document N ANE1254 available on our Web site: Products/Product Documentation. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (e.g. primary connections, 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
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