High Power DC Electronic Loads – 63200A

Ultra High Power Density & User-Defined Hot Key Design

Chroma’s world leading ultra high power density design eliminates oversized and difficult to move high power electronic loads. With it’s small footprint, it solves space issues when upgrading electronic loads in automated test systems. In addition, the 63200A provides 4 sets of user defined hot keys that enable the user to enter operation modes quickly.

Iconic Function Selections

Iconic function selections make it easier for users to control and operate the 63200A series. Basic and advanced functions are iconized, so that users can select from the functions either from the rotary knob or using arrow keys. The abbreviations are displayed in the icons, and full descriptions are displayed on the VFD display to allow users to easily operate the load without referring to an operation manual for every step.

Tiltable Front Panel

The 63200A series is equipped with a tiltable front panel for 7U, 10U & 13U height models. The selectable angles are set to 25°, 50° & 75°. This design allows for convenient operation when the unit is below direct line of site, making it easy to read and manipulate the controls.

Applications For Basic Load Functions

The 63200A series electronic loads operate in constant voltage, current, resistance, power and impedance modes to satisfy a wide range of test requirements. For instance, the CC and CR modes can ensure that the UUT voltage outputs are stable when the load varies. For battery chargers or charging stations, CV mode can change their output voltage to ensure the precision of the charging current. When the UUT is a battery, the electronic load can change discharge rates to simulate the device load behavior. Many battery discharge applications and power consumption profiles can be simulated for analysis, making CP mode the best choice for simulating electronic devices.

Master/Slave Parallel Control

When there is a need for increased power, two or more loads can be run in parallel to achieve the desired load current. The 63200A provides smart Master/Slave mode controls that allows the user to program the load currents at the Master and have them automatically calculated and downloaded to the slave loads. Using several loads in parallel to emulate a single load dramatically simplifies operation. All models of the 63200A series can be integrated into a 41U standard rack to save space. The 63200A can be controlled and reconfigured with automated testing applications via USB (standard), GPIB and Ethernet/LXI (optional) interfaces.

Sine Wave Dynamic Load

The 63200A series has a unique sine wave loading function which allows for the setting of a current bias (I_DC), a loading sine wave (I_AC), and the sine wave frequency. The sine wave loading must be greater than or equal to zero ampere. This function can be used for DCIR testing of D/D, ATX power supplies and fuel cells.

Modern electronic devices operate at very high speeds and demand rapid transient response characteristics. To address these applications, the 63200A series offers high speed, programmable dynamic loading and sweep simulation for testing. The figure shown exhibits the programmable parameters such as current high/low level, T1/T2, rise/fall rate and execution times. When the load current changes continuously, the internal monitoring mechanism and line circuit can minimize the current waveform distortion. The current rise minimum response time for the 150V model is 10μs and the dynamic change is up to 50kHz.

The dynamic mode provides a unique simulation capability allowing users to set the number of times each cycle repeats from 1 ~ 65535. This feature is very suitable for testing D/D converter and instant large withstand current of batteries.

Dynamic Frequency Sweep Control

The 63200A also offers a unique dynamic frequency sweep (as shown on the right) with variable frequencies up to 50kHz. This capability is ideal for determining worst case voltage peaks. Measurement of the Vpeak (+/-) can be achieved using this function with a sampling rate of 500kHz. The dynamic loading mode can simulate different loading conditions for most test requirements. Dedicated remote load sensors and control circuits guarantee minimum waveform distortion during dynamic loading.

Constant Impedance Mode (CZ Mode)

There are many capacitors on the mainboard of modern PCs. To prevent the inrush current from occurring and triggering over current protection of the server power (since the server power charges the capacitors on the mainboard), it is necessary to test the capacitive loading when turning on the power supply. The 63200A series provides the CZ mode for this test.

The unique CZ mode built into the 63200A series can improve the loading behavior of CC & CP mode and make the simulated loading current more realistic.

Ultra High Precision Measurement

The 63200A series provides three operating current ranges and a built-in highly precision A/D converter, achieving 0.015%+0.015%F.S., 0.04%+0.04%F.S. and 0.1%+0.1%F.S. accuracy for voltage, current and power measurement respectively. Precise measurements like these are ideal for testing power efficiency and other critical parameters of the UUT’s.

Over Current & Over Power Testing

To ensure user safety and minimize power supply failure rate, overcurrent and overpower protections have to be taken into consideration during design. The 63200A enables the user to set current and power orders to test overcurrent and overpower protections, also to judge the test result as Pass or Fail on electronic load. The maximum power (Pmax) during testing can be captured and showed on the display without using an oscilloscope to verify the correctness of designed overcurrent and overpower. It can save a lot of testing time for the user.

User Defined Waveforms

In addition to common CC, CV, CP and CR loading modes of conventional loads, the 63200A accepts digital data from DAQ cards or analog data from function generators to allow for complex waveforms to be created.

The 63200A also provides an enhanced feature, User Defined Waveform (UDW), to simulate actual current profiles and waveforms. To reconstruct the actual current waveforms, the user can simply upload the captured waveform data into any load via a Chroma softpanel. Each load is capable of storing up to 10 sets of waveforms with each comprising up to 1.5 millions data points to meet the more strenuous test requirements.

In addition, the 63200A series also provides voltage peak measurement during actual loading conditions. Avoiding the need for using an oscilloscope to capture the voltage peak, saving time and costs.

Battery Discharge Testing

The 63200A has three discharge modes: CC, CR and CP. The electronic load can set cut off voltage and time (1~100,000 sec.) to end loading correctly and make sure the battery is not damaged due to over discharge. In addition it can measure the battery discharge power (WH, AH) and total discharge time. For example, when Load ON is pressed, the 63200A internal clock will start counting until the battery voltage drops to its cut off voltage or Load OFF is pressed. The battery discharge tests can also apply to super capacitors for discharge time testing.

Programmable Load Timing

The 63200A series electronic load has 256 programmable timings built in for various load condition simulations. The following lists applications for common programmed timings.

• 1. Battery discharge (NPC, electric car, electric locomotive, etc.) simulating various dynamic load current waveforms, providing two levels above dynamic current simulation or one shot load simulation. (For single channel output UUT.)
  2. ATX12V power supply mixed load modulation. (For multi channel output UUT.)
  3. Printer power supply for peak power cycle testing. (For three channel output UUT.)

Digitizing Function

The 63200A series offers a digitizing function convenient for the recording of transients in both voltage and current waveforms. The following are the specifications for setting the parameters:

Sampling time: 2μs ~ 40ms / resolution: 2μs (Setting the interval of sampling time)
Sampling point: 1 ~ 15,000 (Setting the total sampling points)

Complex Operating Modes

New complex operating modes include CR+CC, CV+CR and CV+CC modes. The CR+CC mode is suitable for power on testing and the CV+CR mode can replace Von setting while the CV+CC mode can be used for battery discharge testing.

Auto Mode

This mode automatically switches among CV, CR, CC and CP modes. It is suitable for lithium ion battery charger testing to get a complete V-I charging curve. Moreover, the auto mode can avoid damaging the UUT when the protection circuit is damaged.

Remote Softpanel Operation

The 63200A series loads can be operated either from the front panel controls or from an available softpanel. This user friendly software includes all the functions of the 63200A series loads and is easy to understand and operate. The 63200A loads can be controlled via standard USB, or optional Ethernet and GPIB interfaces, for remote control and automated testing applications.

When requirements call for higher power, several loads can be run in parallel to achieve higher load currents from 48kW up to 480kW.  Our Smart Master/Slave mode control simplifies operation and allows programming of the load currents on the Master unit where they are automatically calculated and downloaded to the slave loads. The models below are delivered completely integrated in standard racks to save floor space. Control and program via USB (standard), GPIB and Ethernet/LXI (optional) interfaces. Lead times will vary with power requirements. Please call to order.

Model	Description	Specifications
63200A-48-150	48kW DC Electronic Load	48kW / 150V / 4000A
63200A-48-600	48kW DC Electronic Load	48kW / 600V / 3360A
63200A-48-1200	48kW DC Electronic Load	48kW / 1200V / 1920A
63200A-60-150	60kW DC Electronic Load	60kW / 150V / 5200A
63200A-60-600	60kW DC Electronic Load	60kW / 600V / 4200A
63200A-60-1200	60kW DC Electronic Load	60kW / 1200V / 2400A
63200A-120-150	120kW DC Electronic Load	120kW / 150V / 10000A
63200A-120-600	120kW DC Electronic Load	120kW / 600V / 8400A
63200A-120-1200	120kW DC Electronic Load	120kW / 1200V / 4800A
63200A-240-150	240kW DC Electronic Load	240kW / 150V / 20000A
63200A-240-600	240kW DC Electronic Load	240kW / 600V / 16800A
63200A-240-1200	240kW DC Electronic Load	240kW / 1200V / 9600A