The OWON OEL15/30/60 Series comprises compact programmable DC electronic loads with voltage configurations from 150 V to 600 V, current ratings from 15 A to 30 A and power capacities of 150 W or 300 W. CV, CC, CR and CP operating modes support repeatable testing of power supplies, batteries, chargers, adapters, LED drivers and DC converters.
Dynamic current testing up to 5 kHz, adjustable current slew rates and Remote Sense help engineers evaluate transient response and voltage regulation under changing load conditions. High-resolution readback, SCPI commands and USB or serial connectivity support both manual laboratory work and automated production testing.
Key Features
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Up to 600 V input: Supports testing of low- and higher-voltage DC power systems across three voltage classes.
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Up to 30 A and 300 W: Provides several current and power combinations for adapters, chargers, converters and power supply outputs.
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CV, CC, CR and CP modes: Simulates different electrical load behaviors for power source characterization.
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Dynamic testing up to 5 kHz: Switches between two current levels to evaluate transient response and control-loop behavior.
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Adjustable rise and fall slew rates: Controls the speed of load transitions from 0.01 A/ms to 2,000 A/ms.
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High-resolution readback: Provides voltage resolution of 1 mV and current resolution of 0.1 mA for detailed monitoring.
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Remote Sense: Compensates for test-lead voltage drop and measures voltage closer to the device under test.
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Integrated protection: OVP, OCP, OPP and OTP protect the load and connected equipment during extended tests.
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2.8-inch color display: Presents operating mode, programmed values and real-time measurements in a compact instrument.
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SCPI remote control: USB Device and RS232 interfaces support PC software, custom applications and automated test systems.
CV, CC, CR and CP Operating Modes
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Constant Voltage: Adjusts the drawn current to maintain the programmed input voltage, supporting charger and voltage-regulation tests.
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Constant Current: Draws a fixed current for power supply, adapter, battery and LED driver evaluation.
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Constant Resistance: Simulates a resistive load from 0.05 Ω to 7.5 kΩ.
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Constant Power: Adjusts current as voltage changes to maintain the selected power level.
Dynamic Load Testing
Dynamic current mode alternates automatically between two programmed current levels. Users can configure the duration of each level and independently control the rise and fall slew rates, allowing the load to reproduce rapid changes in system demand.
Dynamic operation reaches 5 kHz, with T1 and T2 settings from 0.1 ms to 50 seconds and a minimum rise time of 20 μs. These controls support power supply transient-response testing, stability evaluation and load-step verification.
Remote Sense and Measurement Readback
Remote Sense compensates for voltage loss across long or high-current test leads by measuring voltage directly at the device under test. This provides a more representative view of DUT output voltage during current loading.
Voltage readback provides 1 mV resolution, current readback provides 0.1 mA resolution and power readback provides 10 mW resolution. These measurements allow programmed load conditions and actual DUT behavior to be monitored together.
Protection Functions
- Overvoltage protection
- Overcurrent protection
- Overpower protection
- Overtemperature protection
The protection system limits stress on the load and device under test during incorrect setup, abnormal DUT behavior or extended high-power operation.
Automation and Optional Test Functions
USB Device and RS232 interfaces are supported as standard, with optional RS485 connectivity available for serial system integration. SCPI commands allow the load mode, setpoints and measurements to be controlled from automated test software.
The optional OEL-T1 test package adds battery discharge, OCP and OPP test functions. An optional OEL-V package provides ripple testing for applications requiring additional power-source analysis.
Applications
- DC power supply load regulation testing
- Battery discharge and capacity evaluation
- Charger and power adapter verification
- DC-DC converter efficiency and transient testing
- LED driver characterization
- Power component and protection testing
- Production-line functional testing
- Repair, maintenance and quality inspection
Model Selection
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OEL1515: 150 V, 15 A and 150 W.
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OEL1520: 150 V, 20 A and 300 W.
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OEL1530: 150 V, 30 A and 300 W.
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OEL3015: 300 V, 15 A and 150 W.
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OEL3020: 300 V, 20 A and 300 W.
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OEL3030: 300 V, 30 A and 300 W.
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OEL6015: 600 V, 15 A and 150 W.
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OEL6020: 600 V, 20 A and 300 W.
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OEL6030: 600 V, 30 A and 300 W.
Select the voltage rating first, followed by the required current and continuous power capacity. All three limits must remain within the selected model’s operating envelope during testing.
Why Choose the OEL15/30/60 Series?
The OEL15/30/60 Series provides static and dynamic loading, detailed measurement readback and automated control in a compact format. Its nine voltage, current and power configurations allow laboratories and production teams to select a load that matches the DUT without moving to a larger high-power platform.
