Power Supply & Converter Manufacturing
Testing AC-DC and DC-DC power supplies, converters, chargers on universal AC input, regulated DC output. What you are proving is that every unit off the line meets spec, fast enough to keep up.
- Device under test
- AC-DC and DC-DC power supplies, converters, chargers
- Bus
- universal AC input, regulated DC output
- Who buys this
- production and test engineering on a manufacturing line
Production cadence is the constraint nobody writes into the standard. The test has to be repeatable at line speed, not just correct on a bench.
Where programmes get caught out
Inrush drive is the spec that gets missed
The generator must sustain very high peak current into a rectifier-capacitor front end, or the dip is not the dip the standard describes.
Test time per unit is the real budget
At line cadence, settling windows and sequencing decide throughput more than instrument count.
Phase-of-dip control changes the result
Where in the cycle the disturbance starts materially alters DUT behaviour, and it must be programmable rather than incidental.
Where the standards have moved
Revision status changes what your report has to cite. Every note below carries the record it came from, retrieved on the date shown.
IEC 61000-3-2 is Edition 5.2, and its scope wording changed in a way that matters
The consolidated 2018 edition with Amendment 1 of 2020 and Amendment 2 of 2024 applies to equipment with a rated input current up to and including 16 A per phase. The fifth edition deliberately changed the scope from equipment with an input current of 16 A or less to equipment with a rated input current of 16 A or less, for consistency with IEC 61000-3-12 — a distinction that decides which document a borderline supply falls under. These are type tests, not routine production tests.
Source: IEC 61000-3-2:2018+AMD1:2020+AMD2:2024 CSV — International Electrotechnical Commission. Retrieved 2026-08-24.
The 2U + 1000 V hipot formula is gone
IEC 62368-1 reached Edition 4.0 on 26 May 2023, with a corrected version issued in August 2025. Dielectric strength no longer comes from the IEC 60950-1 formula: Clause 5.4 keys the test voltage to the peak working voltage at each insulation barrier and to the insulation type, so a design carried across from 60950-1 has to have its voltages re-derived barrier by barrier rather than inherited. The type test and the routine test on every production unit use the same voltage and differ only in duration. Worth stating plainly: that is a dielectric-strength tester's job, not a programmable source's — the source's part of a production line is powering the unit and running the input-side measurements.
Source: IEC 62368-1:2023 publication record — International Electrotechnical Commission. Retrieved 2026-08-24.
Testing to a standard
The clause-by-clause limits, and what each standard deliberately says nothing about.
Equipment for this work
- ELR 9000 Series Regenerative DC Load3.5 kW – 10.5 kW per 3U chassisRegenerative DC load returning test energy to the mains instead of dissipating it as heat — 3.5 kW to 10.5 kW in a single 3U chassis.
- SM Series Programmable DC Power Supply1.5 kW – over 1 MW paralleledCompact programmable DC supplies from 1.5 kW to 15 kW per chassis, parallelable beyond 1 MW.
- B2C+ Bi-Directional DC Converter7.5 kW – over 1 MW paralleledBi-directional DC converter from 7.5 kW to 160 kW per chassis, parallelable beyond 1 MW — sources and sinks, so it suits battery and drive work where energy flows both ways.
- Procyon PTS 2100-20 Battery Test System5 kW – 480 kWScalable bi-directional charge/discharge battery test system — regenerative power stage at better than 93% efficiency, configurable from a desktop unit up to a full test floor.
Specifying a bench for psu?
Send the clause you have to satisfy rather than a shopping list. An engineer will tell you what the rig has to do — including the parts of the programme this equipment does not cover.
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