Iec 61000 4-11

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voltage sag testing

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Iec 61000 4-11

  1. 1.  Voltage dips Short interruption Voltage variation Interruption, voltage dips and voltage variation causes Test level and preferred test level Test procedure 2 types test configuration Summary
  2. 2.  The immunity test method and range of test level applies to electrical/electronic equipment which: Irated ≤ 16A/phase for connection to 50Hz/60Hz ac network
  3. 3. VOLTAGE SHORTDIPS/SAG INTERRUPTION TEST & MEASURE VOLTAGE VARIATION
  4. 4.  Sudden reduction in voltage below specified dip threshold short period of time, follow by recovery to the original voltage
  5. 5.  Decreased below specified interruption threshold Consider as voltage dip to zero. Usually not more then 1 minute Followed by recovery to original voltage
  6. 6.  Change in voltage continuously
  7. 7.  Continuously varying load connecting to network
  8. 8.  Short circuit (eg. SLG) Sudden large change of load
  9. 9.  For equipment that has Vrated range; if the voltage range do not exceed 20% of the lower Vrated, a single voltage may be specified as test level UT
  10. 10.  Class 1 – compatibility level < public network level ◦ Sensitive disturbance to ps (ups necessary) Class 2 - compatibility level = public network level Class 3 - compatibility level > public network level ◦ Large motor frequently start ◦ Welding machines are present ◦ Major part of the load is fed trough converter ◦ Load vary rapidly
  11. 11.  changes in THE Recommended supply voltage shall occur at TEST to use 0º for 1 zero crossing of the phases Addition angel selected from SHORT 45º, 90º, INTERRUPTION 180º,225º,270º and 315º if necessary. DIPS 3 phase Single phase 3 phase  For 3 phase Single phase short interruption, Test 1 by 1 it shall be phase tested simultaneou sly
  12. 12.  Output voltage of generator at no load:  80% of nominal value verified in maximum duration of 5s  70% and 40% of nominal value verified in maximum duration of 3s  Power source within ±2% of frated Shortest ps cable as specified by EUT manufacturer
  13. 13. PRE- TEST PLANNING ANALYSIS Define which EUT FULL•EUT designation system FUNCTION•Possible configuration CHECKconnections (eg: (next slide) toplug, terminal etc) be tested to•Input power port reproduce field•EUT operation situationrepresentative RESULT/•EUT Technical TEST Test report & Anyspecification REPORT/ degradation also•Setup description record RECORD
  14. 14.  Are classified into 4 categories:
  15. 15. 2 TYPES TESTCONFIGURATION IMMUNITY TEST GENERATOR USING VARIABLE TRANSFORMER COMBINATION OF TRANSFORMER TAP
  16. 16. 2 TYPES TEST CONFIGURATION VOLTAGE IMMUNITY TEST DIPS/SAG GENERATOR USING VARIABLE TRANSFORMER TEST & SHORTMEASURE INTERRUPTION COMBINATION OF TRANSFORMER TAP VOLTAGE VARIATION

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