LEM Voltage Transducer LV 25P

Discussion in 'General Electronics Chat' started by Sam0014, Jan 22, 2013.

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  1. Sam0014

    Thread Starter New Member

    Jan 21, 2013
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    hi,
    i have the following Circuit with LEM Voltage Transducer LV 25P, Please See the Picture.
    The input of the circuit must be form the line voltage (230 V Sinus), and the output must be 8 Volt, also Sinus.
    I connected my Circuit with Different Voltage Values, from 35 V till 230 V but every time i got a several mV on the Oscilloscope.
    Can somebody please tell me if the Circuit is correct or not?
    Thanks
     
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  2. SPQR

    Member

    Nov 4, 2011
    379
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    Have you tried all the different output terminal combinations on your oscilloscope?
     
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    What is the power (wattage) rating of your 25k resistor?
     
  4. Sam0014

    Thread Starter New Member

    Jan 21, 2013
    3
    0
    The power rating of both resistor is 3W.

    I tried not just with the oscilloscope to measure the output, but i got always just a little mV.
    And for different Voltage values i got the same output
     
  5. Navaneeth1285

    New Member

    Mar 19, 2015
    8
    0
    hi,
    i tried to sense 80 V dc using lv-25p, i initially tried for voltage value of 10V.but i am not obtaining voltage on the secondary side,
    primary side resistance is 10k ohm 10W, and my secondary side resistance in 150 ohm, i designed them to obtain a voltage of 3V on the secondary side.
    i tried varying the input but there is no change in the secondary side, also my dso is showing negative value..??
     
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