voltage transducer lv 100 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). e lectrical data i pn primary nominal r.m.s. current 10 ma i p primary current, measuring range 0 .. 20 ma r m measuring resistance r m min r m max with 15 v @ 10 ma max 0 150 w @ 20 ma max 0 50 w i sn secondary nominal r.m.s. current 50 ma k n conversion ratio 10000 : 2000 v c supply voltage ( 5 %) 15 v i c current consumption 10 + i s ma v d r.m.s. voltage for ac isolation test 1) , 50 hz, 1 mn 6 kv accuracy - dynamic performance data x g overall accuracy @ i pn , t a = 25c 0.7 % e l linearity < 0.1 % typ max i o offset current @ i p = 0, t a = 25c 0.2 ma i ot thermal drift of i o 0c .. + 70c 0.2 0.3 ma t r response time 2) @ 90 % of v p max 20 .. 100 s general data t a ambient operating temperature 0 .. + 70 c t s ambient storage temperature - 25 .. + 85 c r p primary coil resistance @ t a = 70c 1900 w r s secondary coil resistance @ t a = 70c 60 w m mass 460 g standards 3) en 50178 notes : 1) between primary and secondary 2) r 1 = 100 k w (l/r constant, produced by the resistance and inductance of the primary circuit) 3) a list of corresponding tests is available features closed loop (compensated) voltage transducer using the hall effect insulated plastic case recognized according to ul 94-v0. 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. advantages 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 s tatic converters for dc motor drives battery supplied applications uninterruptible power supplies (ups) power supplies for welding applications . 980709/5 i pn = 10 ma v pn = 100 .. 2500 v lem components www .lem.com
front view left view top view dimensions lv 100 (in mm. 1 mm = 0.0394 inch) remarks i s is positive when v p is applied on terminal +ht. this is a standard model. for different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. mechanical characteristics general tolerance 0.3 mm fastening 2 holes ? 6.5 mm connection of primary m5 screw terminals fastening torque 2.2 nm or 1.62 lb - ft. connection of secondary faston 6.3 x 0.8 mm secondary terminals terminal + : supply voltage + 15 v terminal m : measure terminal - : supply voltage - 15 v connection lem reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. 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 v pn = 1000 v a) r 1 = 100 k w /40 w, i p = 10 ma accuracy = 0.7 % of v pn (@ t a = +25c) b) r 1 = 400 k w / 5 w, i p = 2.5 ma accuracy = 2.5 % of v pn (@ t a = +25c) 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.
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