Ask a Question

What is Voltage Drop Testing?

What is Voltage Drop Testing?

1 Answer
Can you answer this question?

Editorial Team - EMC Directory

Sep 16, 2022

Voltage drop testing is a method of diagnosis to locate high resistance problems in a circuit. This testing helps ensure that the equipment can function properly (as expected and safely) even during power supply fluctuations. Sudden voltage dropouts or dips can result in rise in temperature, vibrations, or even shocks to the equipment under test (EUT). Along with voltage drops, this type of testing is used to test the voltage, dips, sags, brownouts, swells, voltage variations, dropout,s and interruptions.

Which EMC Standard is used for Voltage Drop Testing?

The IEC 61000-4-11(Voltage Variations Immunity Tests) is an EMC standard by the International Electrotechnical Commission for testing and measurement techniques for voltage dips, short interruptions, and voltage variations. This standard specifies the tests, procedures, and limits for voltage dips, dropouts interruptions, and variations of electrical and electronic equipment working on an AC supply having a rated input current not exceeding 16 A per phase with 50 to 60 Hz. 

What Equipment is used for Voltage Drop Testing?

The equipment used for voltage drop testing is:

  • Test Generator
  • Voltmeter
  • Timer
  • AC/DC mains supply
  • Connecting cables
What is the Test Method used for Voltage Drop Testing?

The test generator and EUT are connected to the AC mains. The test generator controls the dip level, and length of the dip and switches between 100% and the dip signal to create the momentary drop in voltage. As per IEC 61000-4-11, each test-voltage dip has to be repeated three times with a 10-second interval between each voltage drop. The EUT is run on its normal operating modes with all of its normal loads. After each voltage dip or interrupt a complete functional check-up of EUT is performed to note any discrepancies. 


../ 38 [{"category":"Questions","label":"what is cispr 16?","url":"../community/what-is-cispr-16","type":null},{"category":"Questions","label":"what is fcc part 15?","url":"../community/what-is-fcc-part-15","type":null},{"category":"Questions","label":"what is iec 61000-6-4?","url":"../community/what-is-iec-61000-6-4","type":null},{"category":"Questions","label":"what is fcc part 18?","url":"../community/what-is-fcc-part-18","type":null},{"category":"Questions","label":"what is iec 61000-4-3?","url":"../community/what-is-iec-61000-4-3","type":null},{"category":"Questions","label":"what is iec 61000-4-8?","url":"../community/what-is-iec-61000-4-8","type":null},{"category":"Questions","label":"what is iec 61000-4-4?","url":"../community/what-is-iec-61000-4-4","type":null},{"category":"Questions","label":"what is iec 61000-4-6?","url":"../community/what-is-iec-61000-4-6","type":null},{"category":"Questions","label":"what is cispr 32?","url":"../community/what-is-cispr-32","type":null},{"category":"Questions","label":"what is iec 61000-4-11?","url":"../community/what-is-iec-61000-4-11","type":null},{"category":"Questions","label":"what is iec 61000-4-2?","url":"../community/what-is-iec-61000-4-2","type":null},{"category":"Questions","label":"what is iec 61000-4-5?","url":"../community/what-is-iec-61000-4-5","type":null},{"category":"Questions","label":"what is radiated emissions testing?","url":"../community/what-is-radiated-emission-testing","type":null},{"category":"Questions","label":"what is iec 61000-3-3?","url":"../community/what-is-iec-61000-3-3","type":null},{"category":"Questions","label":"what is conducted emissions testing?","url":"../community/what-is-conducted-emissions-testing","type":null},{"category":"Questions","label":"what is radiated immunity testing?","url":"../community/what-is-radiated-immunity-testing","type":null},{"category":"Questions","label":"what is cispr 22?","url":"../community/what-is-cispr-22","type":null},{"category":"Questions","label":"what is voltage drop testing?","url":"../community/what-is-voltage-drop-testing","type":null},{"category":"Questions","label":"what is esd testing?","url":"../community/what-is-esd-testing","type":null},{"category":"Questions","label":"what is magnetic field testing?","url":"../community/what-is-magnetic-field-testing","type":null},{"category":"Questions","label":"what is open area test site (oats)?","url":"../community/what-is-open-area-test-site-oats","type":null},{"category":"Questions","label":"what is harmonic and flicker testing?","url":"../community/what-is-harmonic-and-flicker-testing","type":null},{"category":"Questions","label":"what is iec 61000-4-9?","url":"../community/what-is-iec-61000-4-9","type":null},{"category":"Questions","label":"what is surge immunity testing?","url":"../community/what-is-surge-immunity-testing","type":null},{"category":"Questions","label":"what is eft immunity testing?","url":"../community/what-is-eft-immunity-testing","type":null},{"category":"Questions","label":"what is iec 61000-3-2?","url":"../community/what-is-iec-61000-3-2","type":null},{"category":"Questions","label":"what is cispr 12?","url":"../community/what-is-cispr-12_12","type":null},{"category":"Questions","label":"what is cispr 25?","url":"../community/what-is-cispr-25_13","type":null},{"category":"Questions","label":"what is cispr 35?","url":"../community/what-is-cispr-35_14","type":null},{"category":"Questions","label":"what is cispr 11?","url":"../community/what-is-cispr-11","type":null},{"category":"Questions","label":"what is iec 61000-6-2?","url":"../community/what-is-iec-61000-6-2","type":null},{"category":"Questions","label":"what is iec 61000-6-3?","url":"../community/what-is-iec-61000-6-3","type":null},{"category":"Questions","label":"what is conducted immunity testing?","url":"../community/what-is-conducted-immunity-testing","type":null},{"category":"Topics","label":"cispr","url":"~/community/filter?topic=;CISPR;","type":null},{"category":"Topics","label":"emission","url":"~/community/filter?topic=;Emission;","type":null},{"category":"Topics","label":"iec standards","url":"~/community/filter?topic=;IEC Standards;","type":null},{"category":"Topics","label":"immunity","url":"~/community/filter?topic=;Immunity;","type":null},{"category":"Topics","label":"medical","url":"~/community/filter?topic=;Medical;","type":null},{"category":"Topics","label":"military","url":"~/community/filter?topic=;Military;","type":null}] community community question-details content_more