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Programmable Power Supplies

Preen AFV+ Series

High-Power Programmable AC Source, 10kVA to 2000kVA

Testing equipment at genuinely large scale — facility-level product lines, multi-hundred-kVA industrial systems, or export compliance programmes spanning multiple frequency standards — needs an AC source that scales cleanly from bench-top to facility power without a step change in platform or performance. Preen's AFV+ series is built for that range specifically: 10kVA single-phase bench units through to 2000kVA three-phase facility systems, with THD held to 0.5% or better across the entire span.

Frequency coverage extends the AFV+ beyond typical grid-simulation needs: standard 45-120Hz covers most product testing, with 45-500Hz or 300-840Hz options available specifically for aerospace, defence, and double-frequency transformer testing — applications with frequency requirements a standard commercial AC source simply doesn't reach. Three-phase independent voltage adjustment is standard rather than optional, letting each phase be set independently to simulate unbalanced grid conditions, and an optional phase angle adjustment extends this further for simulating phase-shifting disturbances specifically.

Overload capability (optionally up to 200% for 2 seconds, 150% for 5 seconds, or 125% for 15 seconds) provides margin for transient load events during dynamic testing, and a 7-inch or 10.1-inch touch screen with free Preen Program remote control software supports both manual bench operation and automated, software-driven test sequences without needing third-party control software.

Preen AFV+ Series high power programmable AC source
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AFV+ Series
Available as a Containerized / IP54 Option
Like Preen's BPS shore power series, the AFV+ Series can be built into a customized outdoor container or upgraded to an IP54-rated enclosure as an optional configuration — useful for ports, construction sites, remote installations, and other high humidity, heat, dust, or corrosion-exposed environments. Standard indoor chassis remain the default; contact Finch to configure a containerized or IP54 version for your application.
Preen AFV+ Series

AFV+ Series — Single-Phase Output (10-150kVA)

High-power programmable AC source, THD≤0.5%, 45-120Hz standard (45-500Hz or 300-840Hz optional). Three-phase input, single-phase output.
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Technical Specifications

Output PhaseSingle-phase (1Ø) 10-150kVA · Three-phase (3Ø) 10-2000kVA
Output Power Range10kVA–2000kVA
Output Voltage Range0-155/0-310V (L-N) standard; optional up to 400V(L-N)/690V(L-L) or 600V(L-N)/1039V(L-L)
Output Frequency RangeType A: 45-500Hz · Type B: 45-120Hz (standard) · Type C: 300-840Hz
Voltage Accuracy0.5% F.S. + 4 counts
Frequency Accuracy±0.02% F.S.
Total Harmonic Distortion (THD)≤0.5% (resistive load); ≤2% on Type C (300-840Hz) option
Line Regulation<0.5%
Load Regulation≤0.5% (resistive load)
Response Time≤1ms (optional Fast Voltage Response option available)
Crest Factor≥3
Efficiency≥85-90% at max. power (varies by model)
Overload Capability (Opt.)200% for 2s, 150% for 5s, 125% for 15s
Program ModeSTEP: 24 sets/255 cycles · RAMP: 12 sets/255 cycles (Volt./Freq./Time)
Three Phase Independent AdjustmentU-N/V-N/W-N, 0-310V (three-phase models)
ProtectionsInput: N.F.B, Over Voltage, Under Voltage · Output: Over Voltage, Over Current, Over Temperature
Remote InterfacesStandard: RS-232, RS-485, Ethernet · Optional: GPIB, Analog, USB, Interface Card
HMI7" touch screen (10.1" on largest models)
Operating Temperature0°C–45°C
Standout Feature — Remote SensingCompensates voltage drop caused by cable length between source and load
Standout Feature — Phase Angle Adjustment (Opt.)Independently adjustable per-phase voltage and angle, simulating single-phase 2-wire/3-wire grid configurations
ModelPower 
AFV-PLUS-3101010kVAEnquire
AFV-PLUS-3101515kVAEnquire
AFV-PLUS-3102020kVAEnquire
AFV-PLUS-3103030kVAEnquire
AFV-PLUS-3104545kVAEnquire
AFV-PLUS-3106060kVAEnquire
AFV-PLUS-3107575kVAEnquire
AFV-PLUS-31100100kVAEnquire
AFV-PLUS-31120120kVAEnquire
AFV-PLUS-31150150kVAEnquire
Preen AFV+ Series

AFV+ Series — Three-Phase Output (10-2000kVA)

High-power programmable AC source, THD≤0.5%, three phase independent voltage adjustment standard, optional phase angle adjustment. Scales to 2000kVA facility systems.
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ModelPower 
AFV-PLUS-3301010kVAEnquire
AFV-PLUS-3301515kVAEnquire
AFV-PLUS-3302020kVAEnquire
AFV-PLUS-3303030kVAEnquire
AFV-PLUS-3304545kVAEnquire
AFV-PLUS-3306060kVAEnquire
AFV-PLUS-3307575kVAEnquire
AFV-PLUS-33100100kVAEnquire
AFV-PLUS-33120120kVAEnquire
AFV-PLUS-33150150kVAEnquire
AFV-PLUS-33200200kVAEnquire
AFV-PLUS-33300300kVAEnquire
AFV-PLUS-33400400kVAEnquire
AFV-PLUS-33500500kVAEnquire
AFV-PLUS-33600600kVAEnquire
AFV-PLUS-33800800kVAEnquire
AFV-PLUS-3310001000kVAEnquire
AFV-PLUS-3312001200kVAEnquire
AFV-PLUS-3315001500kVAEnquire
AFV-PLUS-3320002000kVAEnquire

Frequently Asked Questions

How is the AFV+ different from the core AFV series?
The AFV+ extends the AFV platform's power scaling and adds phase angle adjustment as an option, targeting larger facility-scale and more demanding grid-simulation applications. The core AFV series covers the same fundamental programmable AC source function at a similarly wide power range but without the AFV+'s specific phase-angle simulation capability.
Why would a test programme need the 300-840Hz frequency option?
Double-frequency transformers and certain aerospace and defence equipment operate on non-standard frequencies well outside the 45-120Hz range most commercial AC sources cover. The 300-840Hz option exists specifically to support qualification testing on this equipment, which a standard-range AC source can't test at all.
What does three-phase independent voltage adjustment let me simulate that a standard three-phase source doesn't?
A standard three-phase source typically outputs balanced voltage across all three phases simultaneously. Independent adjustment lets each phase be set to a different voltage, reproducing unbalanced grid conditions — a real-world scenario equipment needs to tolerate, and one that balanced-only three-phase testing can't evaluate.
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