AC sources and frequency converters
Programmable AC supplies and grid simulators, from a 600 VA bench unit to a 2 MVA installation.
This is the category most British compliance work lands in. G99 type verification wants a variable AC test supply it can step in half-percent increments; Def Stan 61-005 and DO-160 want a source that can hold an abnormal condition long enough to prove the equipment under test survives it; a 400 Hz aircraft bus wants a source that produces 400 Hz properly rather than approximately.
ANRGS(F) regenerative AC and DC source
Supplied and integrated3 kVA – 120 kVA · 0–350 V AC and −495 to +495 V DC · 30–100 Hz · single and three-phase · 21 models
A regenerative source that produces AC or DC from the same chassis across a wide frequency range.
The AC-or-DC-from-one-chassis arrangement suits a bench that has to cover both a grid-connection programme and DC bus work without buying twice. The 30–100 Hz span reaches well outside the 50 Hz British norm, which is what off-nominal frequency testing actually requires.
AN61(F) programmable AC test power supply
Supplied and integrated500 VA – 120 kVA · 0–350 V · 15–1000 Hz (615/618) or 30–100 Hz (619) · AC, DC and AC+DC · 31 models
A programmable AC source family that runs from a bench unit to a cabinet, with the pulse, step, sequence and harmonic modes that immunity testing to IEC 61000-4 asks for.
The reason to specify this family for a British test department is the BS EN 61000-4 immunity work: dips, interruptions and variations to -4-11, harmonics and interharmonics to -4-13, and frequency variation to -4-28 are all modes on the front panel rather than an external arbitrary generator and an amplifier. The 3–4 times peak current is what makes the surge-current measurement on a switched-mode supply honest, because the source is not the thing that limits the inrush.
ANFC(F) AC source and frequency converter
Supplied and integrated15 kVA – 2000 kVA · auto-ranging 1–150 V or 150–300 V · 40–70 Hz plus 100, 120, 200 and 240 Hz · 15 models
A high-power three-phase source and frequency converter with automatic voltage ranging.
Auto-ranging is the practical difference on a production line: full power is available at both the low and high voltage bands without re-configuring, so a line running 115 V and 230 V product does not need two sources or a changeover.
AFC series AC source and frequency converter
Supplied and integrated0.5 kVA – 2 MVA · 5–300 V L-N (8–520 V L-L three-phase) · 47–63 Hz standard, 45–500 Hz Type B · 30 models
A broad frequency-converter range covering bench sizes through to installation scale.
The common British use is exporting or importing equipment built for another supply: running 60 Hz 120 V product on a 50 Hz 230 V site, or proving CE-marked equipment on the supply it will actually meet. Figures should be confirmed against the supplier's current datasheet before they are quoted.