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What is the difference between the three series of 3VA electronic trip units? - Publish Sandy Articles
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What is the difference between the three series of 3VA electronic trip units?

There are three different series of 3VA electronic trip units:

  • 3VA 3-Series electronic trip unit has adjustment knobs and is available either ETU 320 - Long Time and Instantaneous (LI); ETU330 Long Time, Instantaneous and Ground Fault (LIG); or ETU350 Long Time, Short Time and Instantaneous (LSI)
     
  • 3VA 5-Series electronic trip unit has an LCD screen, is communication-capable and is available either ETU550 - Long Time, Short Time and Instantaneous (LSI); ETU 556 - Long Time, Short Time, Instantaneous and Ground Fault Alarm (LSI(G)); ETU560 - Long Time, Short Time, Instantaneous and Ground Fault (LSIG)
     
  • 3VA 8-Series electronic trip unit has an LCD screen with metering, is communication-capable and is available either ETU820 - Long Time and Instantaneous (LI); ETU830 - Long Time, Instantaneous and Ground Fault (LIG); ETU850 - Long Time, Short Time and Instantaneous (LSI); ETU856 - Long Time, Short Time, Instantaneous and Ground Fault Alarm (LSI(G)); ETU860 - Long Time, Short Time, Instantaneous and Ground Fault (LSIG)

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