Voltage Dips and Interruption Test | EMC Compliance Test - Pacific Power

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EMC Test Systems – EPTS Option

Electronic Power Transfer Switch Option

The Pacific Power Source EMC Compliance Test Systems may be equiped with an electronic power transfer switch (EPTS) module that supports the requisite voltage rise and fall slew rates for IEC AC and DC Voltage dips and Interruptions and Voltage Unbalance immunity testing per IEC61000-4-11, IEC61000-4-27,IEC61000-4-29 and IEC61000-4-34.

This optional series consists of several system configurations to accommodate both single and three phase compliance testing with current levels starting at 16Arms or 16Adc up to 100Arms or 100Adc.  All EPTS models are provided with Windows 10 GUI software with IEC61000-4-11 (AC < 16Arms/phase), IEC61000-4-27 (AC 3 Phase < 16Arms/phase) IEC61000-4-29 (DC) and IEC61000-4-34 (AC < 75Arms/phase) Immunity test software.

For questions regarding EMC Compliance Test Systems, please contact us directly or try our live chat.


The EPTS Option allows EMC Test labs to perform full compliance testing of products to the following IEC standards:

IEC 61000-4-11 AC Voltage Dips, Interruptions and Variations to 16A/phase
IEC 61000-4-27 Three Phase Voltage Unbalance to 16A/phase
IEC 61000-4-29 DC Voltage Dips, Interruptions and Variations
IEC 61000-4-34 AC Voltage Dips, Interruptions and Variations to 75A/phase

See the ECTS2 systems product pages for a comprehensive and cost effective solution to all of your EMC compliance testing needs!

Voltage Dips and Interruptions Electronic Power Transfer  Switch Options

Model Max Current Output Form
EPTS-16A-1 16 A Single Phase
EPTS-16A-3 16 Arms / phase Three Phase
EPTS-32A-1 32 A Single Phase
EPTS-32A-3 32 A / phase Three Phase
EPTS-75A-1 75 A Single Phase
EPTS-75A-3 75 A / phase Three Phase
EPTS-100A-1 100 A Single Phase
EPTS-100A-3 100 A / phase Three Phase

Key Features

EPTS Option Key Features

  • Voltage Dips, Interruptions and Variations
  • AC or  DC Modes
  • Available in Single or Three Phase Three versions
  • Requires second AC or DC Source or AC Line for Nominal Voltage
  • Synchronizes to AC Line and provides sync out to programmable AC source
  • EMC Test Software for AC and DC voltage dips, interruptions and variations
  • Test Files for IEC61000-4-11, -4-27, -4-29 and -4-34 Included
  • Create and save custom test sequence files using included Windows GUI Software
  • Detailed test reports to documents EUT compliance
  • Wide Range of Current Levels Available
  • Meets required 1 ~ 5 usec rise/fall time for IEC61000-4-11/34
  • Up to 0-400 VAC L-N / 690V L-L Test Voltage
  • Up to 425Vdc Test Voltage
  • USB Interface
  • AC Bias Input: 120Vac or 230Vac, 50/60Hz


EPTS Option Applications

IEC61000-4-11, IEC61000-4-27, IEC61000-4-29, IEC61000-4-34

When combined with ECTS2 Harmonics and Flicker Test System, AFX AC & DC power source or LMX AC Power Source.

For DC tests, a second DC Power Supply is required to provide the nominal EUT test voltage.

AC Voltage Dips, Interruptions, Variations and Unbalance

The EPTS is designed to work with two AC sources, one of which must be programmable.  In locations where the grid voltage is stable and has the correct voltage and frequency, the grid can be used for the nominal test voltage. The dips and interruptions levels are always provided by the programmable AC source.

DC Voltage Dips, Interruptions and Variations Setups

The EPTS is designed to work with two DC power sources, one of which must be programmable.  On three phase ECTS2 Systems, two phases of the three phase AC & DC power source in DC mode can be used as an alternative to using a second DC power supply. In either configuration, the dips and interruptions levels are always provided by the programmable DC source.


EPTS Option Specifications

Test Voltage Inputs:
AC: 3 Phase + Neutral
DC: 3 Positive Inputs, common negative

Test Voltage:
Up to 400Vac or 425Vdc
Over/Undershoot: < 5% UT

Phase Sync (AC Only):
Range: 0.0° ~ 359.9°
Accuracy: 0.3°

Test Voltage:
Up to 400Vac or 425Vdc
Over/Undershoot: < 5% UT

IEC Modes:
IEC61000-4-11, IEC61000-4-27, IEC61000-4-29, IEC61000-4-34

Dimensions and Weights:
2U Models
HxWxD: 89 x 425 x 552 mm
3.5″ x 16.7″ x 20.5″
11.5 Kg / 25.4 lbs

4U Models
HxWxD: 178 x 432 x 670 mm
7″ x 17″ x 26.4″
42.5 Kg / 93.7 lbs


Electronic Power Transfer Switch – 4U (EPTS)

Electronic Power Transfer Switch – 2U (EPTS)

EPTS Graphical User Interface 4 Windows Test Sequence Screen

Brochures & Manuals

Product Brochure and Application Notes

Download brochure to review product and application notes.

Technical and Application Assistance

Pacific Power Source’s seasoned sales and service team is here to help via chat, email or call 1-800-854-2433 or +1-949-251-1800.