1. 1 Digital Voltage Transducer family DV from 1200 to 4200 V RMS DVL from 50 to 2000 V RMS

2. 2 DVL transducer versus DV  New design based on DV technology  Modularity concept (input and output connections)  Reduced input voltage and isolation  More compact same dimensions as AV 100, same footprint as LV 100  Much larger quantities than DV  Will complete LEM family of voltage transducers  Improved technology (technical risk is reduced)  Solution to reduce cost (simplified electronic, worst accuracy than DV, but better than AV and LV, simplification of insulation, production in China, higher quantities …)

3. 3  Very good accuracy and stable in temperature  Partial discharge extinction voltage of 2.7 kV compatible with permanent DC voltages up to 2 kV  Low power consumption and losses  High immunity to fast common mode voltage changes (several kV/  s)  Very low sensitivity to electro magnetic disturbances  Insensitive to magnetic fields  Low output noise  Input voltage from 50V to 2000V  Output current available: ±50mA or 4 to 10mA DVL: the improvements

4. 4 DVL transducer Input terminals Output connecter Input Output terminals

5. 5 DVL transducer Input output cable Other output on request

6. 6 DVL Technology The primary high input voltage is divided using 2 high voltage dividers, able to withstand high dv/dt and having a low thermal drift. A sigma-delta modulator on the primary side converts this analog value to a serial digital signal (bit-stream and clock are encoded together), that allows to transmit data via one single isolated channel (10MHz). Digital data transmission is isolated by a transformer to provide insulation characteristic.

7. 7 DVL Technology On the secondary side the bit-stream is decoded, filtered and transmitted to the micro- controller by a digital filter. A micro-controller transfers data from the digital filter to a 12 bits DA converter, the transfer time is around 7 μs, this define the response time and the bandwidth of the transducer. Once the micro-controller in place, it is also use for offset and gain adjustment during production. Analog output voltage from DA is then filtered and converted into a current (75 mA full scale) using a current generator protected against short circuits. A voltage output is also foreseen if needed.

8. 8 DVL Technology A DC/DC converter connected to customer supply provide different supply voltages for the secondary side, primary side is supplied through an other isolated transformer having the same principle than the one use for data transmission. Using an innovative design, these 2 isolated transformers guarantee insulation and partial discharge level for voltage application up to 2000V, and their low parasitic capacitance reduce the effect of dynamic common mode.

9. 9 DVL typical performance Typical error of reading in temperatureTypical linearity error Accurate and stable in temperature

10. 10 DVL: Main Characteristics

11. 11 DVL: Main Characteristics

12. 12 DVL: Main Characteristics

13. 13 DVL: Main Characteristics

14. 14 Voltage transducers comparison Voltage sensors LV 100-4000/SP15LV 200-AW/2/SP75CV 4-6000/SP4OV 200DV Overall accuracy (-40 to +85°C)  2.7%  2.5%  1%  1.5%  1% Response time at 90% 200  sec500  sec50  sec60  sec50  sec Low frequency common mode perturbation level < 8% after 100  sec< 2.5% after 200  sec< 5% after 100  sec< 5% after 10  sec < 3% during dv/dt Bandwidth –3dB 4.000 hertz1.200 hertz8.000 hertz14.000 hertz12.000 hertz Isolation voltage level 12kV/50hz/ 1min 12kV/50hz/1min 13.4kV/50hz/ 1min 14kV/50hz/ 1min 18.5kV/50hz/ 1min Partial discharge level 2 kV4.8 kV4.6 kV5 kV Consumption on ±24V 30 mA 50 mA120 mA20 mA Noise level< 0.01% 0.2%0.06%0.02% Thickness (mm)99117.5789054

15. 15 Voltage transducers comparison Voltage sensors LV 100-4000/SP15LV 200-AW/2/SP75CV 4-6000/SP4OV 200DV 61000-4-2OK Not done OK 61000-4-3< 8%< 8%(10V/m, 1GHz) < 6% (10V/m, 1GHz) < 4 %(10V/m, 1GHz) < 1.5 % (20V/m, 2.5GHz) 61000-4-4< 200 usNot done< 1.8us< 8us< 10us 61000-4-5OKNot doneOK 61000-4-64 mANot done1.12mA0.22 mA0.38 mA 61000-4-8< 45uANot done< 150uA< 0.1 uA 55011 conducted emmission Not done 60 dBuV/m47 dBuV/m 55011 radiated emmission 35 dBuV/mNot done 40 dBuV/m39.6 dBuV/m

16. 16 Voltage transducers comparison Voltage sensors LV 100-2000/SP12AV 100-2000DVLLV 25 1000 Overall accuracy (-40 to +85°C)  3%  1.7%  1.5%  2.6% Response time at 90% 60  sec30  sec60  sec Not done Low frequency common mode perturbation level < 3% after 50  sec< 2.5% after 40  sec < 3% during dv/dtNot done Bandwidth –3dB 8.000 hertz11.000 hertz12.000 hertzNot done Isolation voltage level 12kV/50hz/ 1min 6.5kV/50hz/1min 8.5kV/50hz/ 1min 4.1kV/50hz/ 1min Partial discharge level 2 kV2.2 kV2.7 kVNot done Consumption on ±24V 40 mA30 mA20 mA Noise level< 0.004%< 0.2%0.02%Not done MTBF (h) 4 646 698 IEC 62380 2 761 894 IEC 62380 1 883 371 IEC 62380 885 739 HDBK 217

17. 17 Voltage transducers comparison Voltage sensors LV 100-4000/SP15AV 100-2000DVL (investigation)LV 25 1000 61000-4-2OK 61000-4-32.1%1.8%0.5% 1% (10V/m, 1GHz) 61000-4-43% / 70 us2% / 30 us OK 5kHZ and 100 kHz 3%/ 5us 61000-4-5OK 61000-4-68%0.6%0.2%2.2% 61000-4-8< 1%0.2%< 0.1%<1% 55011 conducted emmission 25 dBuV/m Not done 44 dBuV/mNot done 55011 radiated emmission 35 dBuV/mNot done47 dBuV/mNot done