N69200 – Programmable DC Electronic Load up to 60 kW

N69200 programmable DC electronic load overview

The N69200 series applies controlled loads to DC sources for development, laboratory and automated testing. The model range covers rated powers from 2 to 60 kW and voltage classes of 150, 600, 1,200, 1,600 and 2,400 V. Rated currents reach up to 2,500 A, depending on the model. Voltage, current and power must all match the operating point; their individual maximum ratings cannot be combined arbitrarily.

In addition to steady-state loading, the series supports dynamic load transitions, sequences, battery tests and protection threshold testing. Three selectable ranges for the basic operating modes help adapt the instrument to different measurement tasks. Remote sense measures voltage directly at the device under test. Operation is available from the front panel or through the communication interfaces. Units with the same voltage rating can be operated in master-master or master-slave parallel configurations for higher power.

Key benefits

Operating principle and modes

The electronic load draws current from the connected device under test. Within its operating limits, it regulates current, voltage, resistance or power to the selected setpoint.

Power range and model selection

The tables list rated power, voltage class and rated current for all standard models. The 1,200 V versions are available with two different current ratings. High-voltage models rated at 1,600 or 2,400 V cover 3 to 50 kW.

For U > 0, the upper limit is I ≤ min(I-rated, P-available/U). Minimum operating voltage, the operating characteristic and temperature derating must also be observed. A voltage range starting at 0 V does not imply that rated current is available down to 0 V.

Dynamic operation and control behaviour

CCD, CVD, CRD and CPD provide dynamic transitions in current, voltage, resistance and power modes. Continuous operation and triggered Pulse and Toggle modes are available. Adjustable rise and fall slew rates define the transitions. Dynamic frequency sweeps extend up to 30 kHz; the achievable waveform depends on the model, range, slew settings and test setup.

For the N69202-150-200, voltage readback accuracy is 0.015% + 0.015% F.S. and current readback accuracy is 0.04% + 0.04% F.S. Setting accuracy is 0.025% + 0.025% F.S. in CV mode and 0.05% + 0.05% F.S. in CC mode. Conditions are 23 ± 5 °C, relative humidity up to 80% and operation within one year after calibration. F.S. denotes the full-scale value of the selected range.

Programmable test functions

Typical applications

Interfaces, software and automation

Parallel operation and low-voltage option

Units with the same voltage specification support master-master or master-slave parallel operation. The leading master sets the current and distributes the load across the connected units. Unit count, wiring and total power must be engineered for the specific configuration.

For selected 150 V models, an optional NP101 module enables loading down to 0 V: N69206-150-600 with NP101-600, N69208-150-800 with NP101-800, N69210-150-1000 with NP101-1000 and N69212-150-1200 with NP101-1200.

Installation and infrastructure

Protection functions

Programmable OCP, OVP and OPP thresholds stop loading when triggered. Temperature monitoring and module overheat protection stop current draw during overheating. Detected reverse polarity produces a visual and audible alarm. VON/VOFF, timed unloading and Soft On/Off provide additional control of the load routine.

N69200 frequently asked questions