LDA-6

Multichannel-Acoustic Localisation of Partial Discharges inside Powertransformers

Applications

The LDA-6 was developed for acoustic localisation of dangerous Partial Discharges inside Powertransformers. Advanced algorithm allows a high precision localisation of the PartialDischargeSource. A graphical user interface visualise the spatial position of the Partial Discharge Source.

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User Benefits

  • precise localisation of dangerous Partial Discharges
  • can combined with electrical Partial Discharge Measurement Devices LDS-6 or PD-Smart to increase the accuracy (electrical trigger)
  • easy and fast installation of the acoustic sensors due to the magnetic fastener
  • piezoelectric, acoustic sensorswith a small bandwith (noise-suppressionoutside the resonant frequency)
  • up to 8 acoustic channels possible
  • automatic calculation of the propagation velocity depending of the Oil-temperature
  • graphical user interface for visualisation of the measurement results
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Specifications

Power mains
  • voltage 115-120 VAC or 230-240 VAC, 47-63 Hz
  • power consumption 100 VA, approx. (max.)

Signal Stage

Sensor

  • frequency: appr. 150kHz
  • bandwith: appr. 8kH

Signal Input

  • output bias voltage via input 20-28 VDC; internal adjusted
  • max. output current via input 200 mA
  • bias current fusibles cut-out 200 mA
  • wave impedance 50 Ω
  • max. input signal 10 VPeak
  • overvoltage protection > 12 VPea

Signal Output to PC-DAQ card

  • max. number of channels 8 (7)
  • max. RF output signal 10 VPeak
  • output center frequency approx. 150 kHz (by amplification "1"
  • approx. 90 kHz (not by amplification "1")
  • bandwidth approx. 100 kHz
  • switcheable max. amplifications 1, 10, 50, 100

Testvoltage Stage

Signal Input

  • max. input signal 50 VPeak
  • overvoltage protection > 90 VPea

Signal Output to PC-DAQ card

  • max. number of channels 1
  • max. output signal 10 VPeak
  • output frequency 0-300 Hz

Dimensions 342.1 mm * 132.5 mm * 326 mm (w*h*l)

Weight main unit approx. 6 kg,

Protection class IP 20

Environmental conditions

operating temperature: + 5 °C ... + 40 °C

storage temperature: -5 °C ...+60 °C

max. relative atmospheric humidity: 93 % at 30 °C max., not condensed

atmospheric pressure: standard pressure

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Accessories

  • acoustic sensor (150kHz) incl. magnetic fastener
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Downloads

  •  Prospect LDA-6
Download Prospect
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