Voltage transducer V PN = 4 V Ref: DV 4/SP4 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 6 kv Current output Input and output connections by 5 studs + Safety nuts 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 phase 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). 11ay1/version 3 Page 1/8
DV 4/SP4 Absolute maximum ratings Parameter Symbol Value aximum supply voltage (V P =,.1 s) ± 34 V aximum supply voltage (working) (-4.. 85 C) ±V C ± 6.4 V aximum input voltage (DC) (-4.. 85 C) 6 kv aximum steady state input voltage (-4.. 85 C) V PN 4 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 in Comment RS voltage for AC isolation test 5/6Hz/1 min V d kv 18.5 1 % tested in production aximum impulse test voltage (1./5 µs exponential shape) kv 3 Isolation resistance R IS Ω measured at 5 V AC 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 in Typ ax Ambient operating temperature T A C -4 85 Ambient storage temperature T S C -5 9 ass m g 6 Standards EN 5155: 7 EN 511-3-: 6 EN 514-1: 1 11ay1/version 3 Page /8
DV 4/SP4 Electrical data DV 4/SP4 At T A = 5 C, ±V C = ±4 V, R = 1 Ω, unless otherwise noted. Lines with a * in the conditions column apply over the -4.. 85 C ambient temperature range. Parameter Symbol Unit in Typ ax Conditions Primary nominal voltage, rms V PN V 4 * Primary voltage, measuring range V P V -6 6 * easuring resistance R Ω 14 * See derating on figure for I V P I < 6 kv, max value of R is given in figure1 Secondary nominal current, rms I SN ma 5 * Output range I S ma - 71.4 71.4 * 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 µs -5 5 1% tested in production Offset drift I OT µa -8-8 -1 8 8 1 * -5.. 7 C -5.. 85 C -4.. 85 C,1% tested in production Sensitivity G µa/v 11.948 5 ma for 4 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 * ±6 V range Overall accuracy X G % of V PN -.3 -.7-1. -1..3.7 1. 1. * 5 C; 1% tested in production -5.. 7 C -5.. 85 C, -4.. 85 C Output current noise, rms i no µa ms 1 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 4 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 Ω 3 * Total primary power loss @ V PN P W.77 * 11ay1/version 3 Page 3/8
DV 4/SP4 Typical performance characteristics aximum measuring resistance (Ohm) 5 4 3 1 T A = -4.. 85 C V C = ±13.5 to ±6.4 V 4 6 easuring range (V) inimum measuring resistance (Ohm) 1 9 8 7 6 5 4 3 1 Vc = ±4 V Vc = ±15 V T A = -4.. 85 C 1 3 4 5 Nominal input voltage (V) Figure 1: aximum measuring resistance Figure : inimum measuring resistance Under T A = 8 C, the minimum measuring resistance is whatever Vc Electrical offset drift (ua) 1 75 5 5-5 -5-75 -1 ax Typical in -5-5 5 5 75 1 Ambient temperature ( C) Error (%) 1..8.4. -.4 -.8-1. ax Typical in -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 ax Typical in -5-5 5 5 75 1 C1 : V P (84 V/div) C : I s (1 ma/div) Timebase : µs/div Ambient temperature ( C) Figure 5: Sensitivity thermal drift Figure 6: Typical step response ( to 4 V) 11ay1/version 3 Page 4/8
DV 4/SP4 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 Sr 8-Jul-8 1:11:8-3 1 1 1 1 3 1 4 1 5 Frequency (Hz) Phase (deg) 15 1 5-5 -1-15 Sr 8-Jul-8 1:11:8 1 1 1 1 3 1 4 1 5 Frequency (Hz) Figure 9: Typical frequency response.1 Frequency response Device: DV4/SP4, R = 5 ohm Frequency response Device: DV4/SP4, R = 5 ohm -.1 -. -.3-1 - -3 Gain (db) -.4 -.5 -.6 -.7 -.8 -.9 Phase (deg) -4-5 -6-7 -8-1 Sr 8-Jul-8 1:11:8 1 1 1 1 3 1 4 Frequency (Hz) -9 Sr 8-Jul-8 1:11:8 1 1 1 1 3 1 4 Frequency (Hz) Figure 1: Typical frequency response (detail) 11ay1/version 3 Page 5/8
DV 4/SP4 Typical performance characteristics (continued) C1 : V P (1 V/div) F : I s (5 µa/div) Timebase : 1 µs/div C1 : V P (1 V/div) F : I s (5 µa/div) Timebase : µs/div Figure 11: Typical common mode perturbation Figure 1: Detail of typical common mode perturbation (4 V step with 6 kv/µs, R = 1 Ω) (4 V step with 6 kv/µs, R = 1 Ω) RS noise current at I f c is upper cut off frequency of bandpass, low cut off freq is 1 Hz -1 1-4 Device: DV4/SP4-15 -11 v n (dbvrms/rthz) -115-1 -15-13 I n (A) 1-5 1-6 -135-14 -145 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 ) with R = 5 Ω Figure 14: Typical total output current noise (rms) with R = 5 Ω (fc is upper cut off frequency of bandpass, low cut off frequency is 1 Hz) Linearity error (% of 6 kv).3%.%.1%.% -.1% -.% -.3% -6-3 3 6 Primary 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) = 1 µa. The output current noise (rms) is therefore -6 6-6 6) Figure 15: Typical linearity error (1 1 (1 ) 1 (.3 ) (.3 1 1) ) =.95 µ A 11ay1/version 3 Page 6/8 In ( f ) ( f In 1)
DV 4/SP4 Performance parameters definition The schematic used to measure all electrical parameters are: Figure 16: standard characterization schematics for current output transducers (R = 5 Ω unless otherwise noted) Figure 17: standard characterization schematics for voltage output transducers (R = 1 kω unless otherwise noted) 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 P I S G V P V P T A V O V OT (T A ) ε G VP VP +HV -HV +HV -HV Isolation barrier Isolation barrier : 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 voltage (V) : the temperature variation of V O at temperature T A (V) : 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 + - + - V IS R VS +VC -VC V +VC -VC 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 = Sensitivity and linearity To measure sensitivity and linearity, the primary voltage (DC) is cycled from V P, then to -V P and back to (equally spaced V P /1 steps). The sensitivity G is defined as the slope of the linear regression line for a cycle between ± V P. 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. agnetic offset Due to its working principle, this type of transducer has no magnetic offset current I O. 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. Overall accuracy ( error_ component) 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 11ay1/version 3 Page 7/8
DV 4/SP4 Dimensions DV 4/SP4 (in mm) Connection echanical characteristics General tolerance ± 1 mm Transducer fastening 4 6 steel screws 4 washers of ext. 18 mm Recommended fastening torque 5 Nm Connection of primary 5 threaded studs Recommended fastening torque. Nm Connection of secondary 5 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. ain supply must be able to be disconnected. 11ay1/version 3 Page 8/8