Voltage Transducer LV 100 IPN = 10 mA VPN = 100 .. 2500 V For the electronic measurement of voltages : DC, AC, pulsed..., with a galvanic isolation between the primary circuit (high voltage) and the secondary circuit (electronic circuit). Electrical data IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance with ± 15 V ISN KN VC IC Vd @ ± 10 mA @ ± 20 mA 10 mA 0 .. ± 20 mA RM min RM max max max Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption R.m.s. voltage for AC isolation test 1), 50 Hz, 1 mn 0 0 150 50 50 10000 : 2000 ± 15 10 + IS 6 Ω Ω Features • Closed loop (compensated) voltage transducer using the Hall effect • Insulated plastic case recognized according to UL 94-V0. mA V mA kV Principle of use • For voltage measurements, a current proportional to the measured voltage must be passed through an external resistor R 1 which is selected by the user and installed in series with the primary circuit of the transducer. Accuracy - Dynamic performance data XG ε Overall Accuracy @ IPN , TA = 25°C Linearity L ± 0.7 < 0.1 Typ % % Max ± 0.2 ± 0.3 Advantages IO IOT Offset current @ IP = 0, TA = 25°C Thermal drift of IO 0°C .. + 70°C ± 0.2 mA mA tr Response time 2) @ 90 % of VPN 20 .. 100 µs 0 .. + 70 - 25 .. + 85 1900 60 460 EN 50178 °C °C Ω Ω g General data TA TS RP RS m Ambient operating temperature Ambient storage temperature Primary coil resistance @ TA = 70°C Secondary coil resistance @ TA = 70°C Mass Standards • • • • • • Excellent accuracy Very good linearity Low thermal drift Low response time High bandwidth High immunity to external interference • Low disturbance in common mode. Applications • AC variable speed drives and servo motor drives • Static converters for DC motor drives • Battery supplied applications • Uninterruptible Power Supplies (UPS) • Power supplies for welding applications. Notes : 1) 2) Between primary and secondary R 1 = 100 kΩ (L/R constant, produced by the resistance and inductance of the primary circuit). 030131/6 LEM Components w w w .lem.com Dimensions LV 100 (in mm. 1 mm = 0.0394 inch) Front view Left view Connection Top view Mechanical characteristics • General tolerance • Transducer fastening Fastening torque max • Connection of primary Fastening torque max • Connection of secondary Remarks ± 0.3 mm 2 holes ∅ 6.5 mm M6 steel screws 5 Nm or 3.69 Lb - Ft. M5 screw terminals 2.2 Nm or 1.62 Lb - Ft. Faston 6.3 x 0.8 mm • IS is positive when VP is applied on terminal +HT. • This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. Instructions for use of the voltage transducer model LV 100 Primary resistor R 1 : the transducer’s optimum accuracy is obtained at the nominal primary current. As far as possible, R 1 should be calculated so that the nominal voltage to be measured corresponds to a primary current of 10 mA. Example: Voltage to be measured VPN = 1000 V a) R 1 = 100 kΩ/40 W, IP = 10 mA b) R 1 = 400 kΩ/ 5 W, IP = 2.5 mA Accuracy = ± 0.7 % of VPN (@ TA = +25°C) Accuracy = ± 2.5 % of VPN (@ TA = +25°C) Operating range (recommended) : taking into account the resistance of the primary windings (which must remain low compared to R 1, in order to keep thermal deviation as low as possible) and the isolation, this transducer is suitable for measuring nominal voltages from 100 to 2500 V. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.