= 1000 V. Voltage transducer DVC 1000-P V P N
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1 Voltage transducer DVC 1-P V P N = 1 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 15 V Voltage output PCB mount 8 pins 5 V unipolar power supply. Advantages Low consumption and low losses Compact design Very low sensitivity to common mode voltage variations Excellent accuracy (offset, sensitivity, linearity) Low temperature drift High immunity to external interferences. Standards EN 5155: 27 EN : 215 EN : 21 IEC 611-1: 21 IEC 618-1: 1997 IEC 618-2: 215 IEC 618-3: 217 IEC : 27 IEC : 21. Application Domain Traction (trackside and onboard) Industrial. Applications Single or three phase inverters AC variable speed drives and servo motor drives Static converters for DC motor drives Uninterruptible Power Supplies (UPS) Power supplies for welding applications. Auxiliary converters Substations. N 97.Q9.6.. Page 1/9
2 DVC 1-P Absolute maximum ratings Parameter Symbol Unit Value Maximum supply voltage (V P = V,.1 s) U C max V 6 Maximum supply voltage (working) ( 4 85 C) U C max V 5.25 Maximum primary voltage ( 4 85 C) V P max V 15 Maximum steady state primary voltage ( 4 85 C) V P N max V 1 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 7.84 Partial discharge RMS test voltage (q m < 1 pc) U t V 15 Insulation resistance R INS MΩ 2 Clearance (pri. - sec.) d CI mm Creepage distance (pri. - sec.) d Cp mm See dimensions drawing on page 9 Shortest distance through air Shortest path along device body Case material - - V According to UL 94 Comparative tracking index CTI V 6 Maximum DC common mode voltage V HV+ + V HVand V HV+ V HV- kv 1.5 V P M 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 22 Page 2/9
3 DVC 1-P Electrical data At T A = 25 C, +U C = +5 V, R M = 2 kω, 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 RMS voltage V P N V 1 * Primary voltage, measuring range V P M V * Measuring resistance R M Ω 2 * Secondary nominal RMS voltage V S N V 3.83 * Secondary voltage V S V * Supply voltage U C DC V * 5 V ±5 % DC Rise time of U C (1-9 %) t rise ms 1 Current U C = +5 V at V P = V I C ma 35 See temperature variation on figure 4 Offset voltage V O V % tested in production Temperature variation of V O V O T mv * 4 85 C Sensitivity G mv/v V for primary 15 V Sensitivity error ε G %.8.8 ε V P N Thermal drift of sensitivity ε G T %.4.4 * Linearity error ε L % of V P M.2.2 ±15 V range Overall accuracy X G % of V P N * 25 C; 1 % tested in production; 4 85 C Output RMS noise voltage V no µv 6 1 Hz to 1 khz Reaction 1 % of V P N t ra μs 1.7 Response 9 % of V P N t r μs 1 to 1 V step, 6 kv/µs Frequency bandwidth BW khz Start-up time t start ms 2 * db 1 db Resistance of primary R P MΩ 12.6 * Total primary power V P N P P W.8 * 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 3/9
4 DVC 1-P Typical performance characteristics Electrical offset drift (mv) 5 25 Mean + 3s Typical Mean - 3s Overall accuracy (%) Mean + 3s Typical Mean - 3s Ambient temperature ( C) Ambient temperature ( C) Figure 1: Electrical offset thermal drift Figure 2: Overall accuracy in temperature Sensitivity drift (%) Mean + 3s Typical Mean - 3s Typical supply current (ma) 5 UC = +5V Ambient temperature ( C) Ambient temperature ( C) Figure 3: Sensitivity thermal drift Figure 4: Supply current function of temperature Input V P : 2. V/div Output V S : 2 mv/div Timebase: 1 µs/div Input V P : 2. V/div Output V S : 5 mv/div Timebase: 5 µs/div Figure 5: Detail of typical common mode perturbation Figure 6: Typical step response ( to 1 V) (1 V step with 6 kv/µs, R M = 2 kω) Page 4/9
5 DVC 1-P Typical performance characteristics Gain (db) Phase (deg) Figure 7: Typical frequency and phase response Gain (db) Phase(deg) Figure 8: Typical frequency and phase response (detail) Page 5/9
6 DVC 1-P Typical performance characteristics continued e no (dbv RMS /Hz 1/2 ) V no (V RMS) 1E-2 1E-3 1E-4 1E-5 1E Figure 9: : Typical output noise voltage spectral density e no Figure 1: Typical total output RMS noise voltage with R M = 2 kω with R M = 2 kω Linearity error (% of V PN ) Primary voltage (V) Figure 9 (output noise voltage spectral density) shows that there are no significant discrete frequencies in the output. Figure 1 confirms the absence of steps in the total output RMS noise voltage that would indicate discrete frequencies. To calculate the noise in a frequency band f1 to f2, the formula is: V V no (f2) 2 V no (f1) 2 no (f1 to f2) = with V no (f) read from figure 1 (typical, RMS value). Example: What is the noise from 1 to 1 khz? Figure 1 gives: V no (1 Hz) = 78 µv and V no (1 khz) = 171 µv. The output RMS noise current is therefore. (171 x 1 6 ) 2 (78 x 1 6 ) 2 = 152 µv Figure 11: Typical linearity error at 25 C Page 6/9
7 DVC 1-P Performance parameters definition The schematic used to measure all electrical parameters is: Figure 12: Standard characterization schematic for voltage output transducers Transducer simplified model The static model of the transducer at temperature T A is: V S = G V P + ε In which ε = V O E + V O T (T A ) + ε G G V P + ε G T (T A ) G V P + ε L G V P M V S G V P V P M T A V O E : secondary voltage (V) : sensitivity of the transducer (V/V) : primary voltage (V) : primary voltage, measuring range (V) : ambient operating temperature ( C) : electrical offset voltage (V) V O T (T A ) : temperature variation of V O at temperature T A (V) ε G : sensitivity error at 25 C ε G T (T A ) : thermal drift of sensitivity at temperature T A : linearity error ε L Sensitivity and linearity 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. Offset The offset voltage V O is the residual output voltage when the input voltage is zero. The temperature variation V O T of the offset voltage V O is the variation of the 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. 1 % 9 % V P V V S 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: 1 % t r ε = N ii =1 2 ε ii t ra Figure 13: response time t r and reaction time t ra t Page 7/9
8 DVC 1-P PCB Footprint in mm. Assembly on PCB Recommended PCB hole diameter Maximum PCB thickness 1.2 mm for primary pin 1.2 mm for secondary pin 2.4 mm Page 8/9
9 DVC 1-P Dimensions (in mm) Connection d CI (mm) d Cp (mm) Mechanical characteristics General tolerance Transducer fastening Remarks.5 mm 8 holes.64 mm Safety This transducer must be used in limited-energy secondary circuits according to IEC V S is positive when a positive voltage is applied on +HV. The transducer is directly connected to the primary voltage. Care must be taken to maintain the creepage and clearance distances with the board design using proper PCB techniques. 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. This is a standard model. For different versions (supply voltages, sensitivity, unidirectional measurements...), please contact us. Caution 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 (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. All installations, maintenance and servicing operations must be carried out by trained operators. Failure to observe the installation instructions may compromise the protection provided by the unit. Page 9/9
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