GW Instek AEL-5006-350-56 350V/56A 5600W Programmable AC/DC Electronic Load

Key Features At A Glance

• Wide power range from 1875 W to 22500 W across the AEL-5000 family for sizing to inverter, UPS, and battery test applications
• Voltage ranges available at 350 Vrms/500 Vdc, 425 Vrms/600 Vdc, and 480 Vrms/700 Vdc to match diverse AC source and battery bus levels
• Multiple operating modes: Constant Current (sine-wave and linear for square/quasi-square/PWM), Constant Resistance, Constant Voltage, and Constant Power
• UPS test capability including Transfer Time measurement, Battery Discharge function, and UPS Back-Up function with programmable UVP threshold
• Fuse Test, Short Test, OPP/OCP Test, programmable Inrush current simulation (Istart-Istop/Tsep), and programmable Surge current simulation (S1/T1-S2/T2-S3/T3)
• Turbo mode supports up to 2X current and power rating for Fuse, Short, OCP, and OPP test functions on supported models
• Master/Slave configuration: one master with up to seven slave units for three-phase or parallel applications
• Optional GPIB, RS-232, LAN, and USB interfaces with external programming input (F.S / 10 Vdc, resolution 0.1 V) and external SYNC (TTL) for ATE integration

The Instek AEL-5000 Series is a family of programmable AC/DC electronic loads designed for testing inverters, uninterruptible power supplies (UPS), batteries, and AC/DC power conversion equipment. The series spans models from 1875 W up to 22500 W, with voltage ratings of 350 Vrms/500 Vdc, 425 Vrms/600 Vdc, and 480 Vrms/700 Vdc to align with common AC mains levels and battery bus voltages. Each unit operates across a DC and 40 to 440 Hz frequency range in CC and CP modes (DC to 440 Hz in LIN, CR, and CV modes), with the 480 V family covering DC and 40 to 70 Hz.

According to the datasheet, the AEL-5000 Series is applied to UPS Transfer Time measurement, UPS Back-Up function testing, Battery Discharge function testing, and measurement of efficiency for PV (resistive plus non-linear mode). The series also supports Fuse Test, Short/OPP/OCP Test, programmable Inrush current simulation, and programmable Surge current simulation, making it suitable for power-on loading during inverter and UPS start-up sequences as well as half-cycle and SCR/TRIAC loading scenarios.

Brand Heritage

Instek (also branded as GW Instek) is a Taiwanese test and measurement manufacturer founded in 1975 and headquartered in New Taipei City. The company has operated continuously under the Instek name and remains an independent manufacturer of bench instruments, power supplies, electronic loads, and signal sources.

Compare Other Models in This Series

The AEL-5000 Series is organized into model variants distinguished by power rating, current rating, and voltage class. Power ratings span 1875 W, 2800 W, 3750 W, 5600 W, 7500 W, 11250 W, 15000 W, 18750 W, and 22500 W. Current ratings include 18.75 Arms, 28 Arms, 37.5 Arms, 56 Arms, 75 Arms, and 112.5 Arms. Voltage classes are 350 Vrms/500 Vdc, 425 Vrms/600 Vdc, and 480 Vrms/700 Vdc.

The model number encodes the configuration: for example, AEL-5004-350-37.5 indicates a 3750 W model at 350 Vrms with 37.5 Arms current rating, while AEL-5023-425-112.5 indicates a 22500 W model at 425 Vrms with 112.5 Arms. The 480 V family is presently represented by the AEL-5003-480-18.75 (2800 W) and AEL-5004-480-28 (3750 W) variants, which operate over a narrower DC and 40 to 70 Hz frequency range.

Each new AEL-5000 Series model below is its own dedicated product page with condition-matched pricing. Click any model below to view the specific page for that variant.

Within the 350 V and 425 V families, models scale primarily by power and current rating: from the entry 1875 W / 18.75 Arms units (AEL-5002 designation) up to the 22500 W / 112.5 Arms units (AEL-5023 designation). The higher-power models occupy larger chassis form factors, with the 5600 W and 7500 W units in a 458 x 480 x 590 mm chassis, the 11250 W unit in an 814 x 480 x 590 mm chassis, and the 15000 W through 22500 W units in 1283 x 600 x 600 mm cabinets.

The 480 V family operates across DC and 40 to 70 Hz, while the 350 V and 425 V families operate across DC and 40 to 440 Hz in CC and CP modes. All families share the same core operating modes (CC, Linear CC, CR, CV, CP), UPS test functions, Fuse Test, Short/OPP/OCP Test, and programmable Inrush and Surge current simulation features. See the comparison table that follows for specific differences in voltage, current, power, resistive range, and chassis dimensions across the AEL-5000 family.

Model	Max Voltage	Max Current (RMS)	Max Power
AEL-5006-350-56	50~350 Vrms / 500 Vdc	56 Arms / 168 Apeak	5600 W
AEL-5002-350-18.75	50~350 Vrms / 500 Vdc	18.75 Arms / 56.25 Apeak	1875 W
AEL-5003-350-28	50~350 Vrms / 500 Vdc	28 Arms / 84 Apeak	2800 W
AEL-5004-350-37.5	50~350 Vrms / 500 Vdc	37.5 Arms / 112.5 Apeak	3750 W

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Product Core & Specifications

Category	Specification	Value
Operation Mode	Constant Current Mode for Sine-Wave Accuracy	±(0.1% of setting + 0.2% of range) @ 50/60Hz
Operation Mode	Linear Constant Current Mode (Sine, Square, Quasi-Square, PWM) Accuracy	±(0.1% of setting + 0.2% of range) @ 50/60Hz
Operation Mode	Constant Resistance Mode Accuracy	±0.2% of (setting + range) @ 50/60Hz
Operation Mode	Constant Voltage Mode Accuracy	±0.1% of setting + 0.1% of range
Operation Mode	Constant Power Mode Accuracy	±0.1% of setting + 0.1% of range
Crest Factor (CC & CP Mode)	Range / Resolution / Accuracy	√2 to 5 / 0.1 / (0.5% / Irms) + 1% F.S.
Power Factor (CC & CP Mode)	Range / Resolution / Accuracy	0 to 1 Lag or Lead / 0.01 / 1% F.S.
Test Mode	UPS Efficient Measurement	Non-Linear Mode, Auto 40~440Hz
Test Mode	Measuring Efficiency for PV	Resistive + Non-Linear Mode, Auto 40~440Hz
UPS Back-Up / Battery Discharge	Back-Up / Discharge Time	1 to 99999 Sec. (>27H)
UPS Transfer Time	UVP (VTH) / Time Range	2.5V / 0.15mS to 999.99mS
Short / OPP / OCP Test	Short Time	0.1S to 10Sec. or Continuous (Turbo OFF); 0.1S to 15Sec. (Turbo ON)
Short / OPP / OCP Test	OPP/OCP Step Time	100ms (Turbo OFF); 100ms, up to 10 Steps (Turbo ON)
Fuse Test Mode	Trip & Non-Trip Time	0.1 to 9999.9 sec (Turbo OFF); 0.1 to 1.0 sec (Turbo ON)
Fuse Test Mode	Measurement Accuracy	±0.003 Sec.
Fuse Test Mode	Repeat Cycle	0 to 255
Programmable Surge Current	T1 and T2 Time	0.01S to 0.5Sec. (Turbo OFF); 0.015 to 0.55sec (Turbo ON)
Programmable Surge Current	T3 Time	0.01S to 9.99Sec. or Continuous
Programmable Inrush Current	Inrush Step Time	0.1mS to 100mS
Measurements	Voltage Readback Accuracy	±0.05% of (reading + range)
Measurements	Voltage Readback Parameter	Vrms, V Max/Min, +/-Vpk
Measurements	Current Readback Accuracy	±0.05% of (reading + range) @ 50/60Hz
Measurements	Current Readback Parameter	Irms, I Max/Min, +/-Ipk
Measurements	Watt Readback Accuracy	±0.05% of (reading + range) @ 50/60Hz [low-voltage models]; ±0.2% / ±0.4% [high-power models]
Power Factor Meter	Range / Accuracy	+/- 0.000 to 1.000 / ±(0.002 ± (0.001/PF)*F)
Frequency Meter	Range / Accuracy	DC, 40 to 440Hz (480V models: DC, 40 to 70Hz) / 0.1%
VA Meter	Calculation	Vrms × Arms corresponding to Vrms and Arms
Other Parameter Meter	Parameters	VA, VAR, CF_I, Ipeak, Imax, Imin, Vmax, Vmin, IHD, VHD, ITHD, VTHD
Others	Start-Up Loading	Yes - Power-on loading during Inverter / UPS start up
Others	Load ON / OFF Angle	0 to 359 degrees programmable for load ON/OFF angle
Others	Half Cycle and SCR/TRIAC Loading	Positive or Negative half cycle, 90° Trailing or Leading edge current waveform programmable
Others	Master/Slave (3-phase or Parallel)	Yes, 1 master and up to 7 slave units
Others	External Programming Input (Option)	F.S / 10Vdc, Resolution 0.1V
Others	External SYNC Input	TTL
Others	Vmonitor (Isolated)	±500V/±10V (350V models); ±600V/±10V (425V models); ±700V/±10V (480V models)
Others	Interface (Option)	GPIB; RS-232; LAN; USB
Others	Operation Temperature	0 to 40°C

Important: Maximum input voltage rating is model-dependent: 500 Vdc / 350 Vrms, 600 Vdc / 425 Vrms, or 700 Vdc / 480 Vrms. Confirm the model's voltage rating matches the DUT's bus voltage with adequate margin before connection.Important: ms (millisiemens) is the unit of conductance (G); one siemens equals 1/Ω.Important: Operating temperature range is 0~40°C; all specifications apply for 25°C ±5°C, except as noted.Important: Turbo mode provides up to 2X Current Rating and Power Rating; supports Fuse, Short/OCP/OPP test functions.Important: All specifications apply for 50/60Hz.Important: All specifications are subject to change without notice.Important: Communication interfaces (GPIB, RS-232, LAN, USB) and External Programming Input are optional and must be ordered separately.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.