This high-capacity regenerative electronic load series contributes to carbon neutrality! Its highly efficient power regeneration reduces energy loss.
Rated power of 20 kW in 3U In addition to constant-current, constant-resistance, constant-voltage, and constant-power operating modes, I-V characteristic function is provided. LAN, USB, and RS232C communication functions are included as standard, allowing easy integration into various evaluation systems.
Large capacity regenerative electronic load device PXZ series
The PXZ series of highly efficient, reliable, high-capacity regenerative electronic loads has a rated power of 20 kW in 3U. In addition to the constant-current, constant-resistance, constant-voltage, and constant-power operating modes, this series has an I-V characteristic function that allows the user to set arbitrary I-V characteristics for each CC and CV operating mode. The series is also equipped with various functions, such as sequence, pre-charge, synchronous operation, pulse, sine, and VMCB functions.
LAN, USB, and RS232C communication functions are included as standard, allowing easy integration into various evaluation systems. The PXZ series is highly scalable, and its capacity can be increased up to 500 kW when operating in parallel (up to 25 units).
1500V
Maximum voltage: 1500V high voltage compatible.
Regenerative Efficiency of Over 90%
Regenerates power with an efficiency of 90 %or higher and load power of 6 kW or more.
external analog control standard
LAN, USB, RS232C, external analog control (isolated type) as standard
Input current AC (200 V 3-phase) / (400 V 3-phase)
Weight
PXZ20K-50
20kW
3V to 50V
800A
80／40A
Approx. 41 kg
PXZ20K-500
10V to 500V
120A
80／40A
Approx. 38kg
PXZ20K-1000
20V to 1000V
60A
80／40A
Approx. 37kg
PXZ20K-1500
30V to 1500V
30A
80／40A
Approx. 37kg
Features
Regenerative Efficiency of Over90% * At Rated Input
Thanks to high-performance switching technology, the PXZ series regenerates power with an efficiency of 90 % or higher (maximum regenerative efficiency of approximately 95 %) and load power of 6 kW or more. Since the regenerated power can be reused, carbon dioxide emission is significantly reduced.
Please note that this product is designed for on-site regeneration. (This is not a grid-connected device that returns the power to the grid.)
The Value of Regenerative Power Is Visible at a Glance!
A large LCD display shows regenerative power value in real time. Energy-saving benefits are visible at a glance.
* The displayed power value is for reference only and may differ by up to ±500 W.
Wide Operating Range With an Expansion Ratio of 2.25 to 3 Times
The PXZ20K-500 has an operating range of 10 V to 500 V, while the PXZ20K-1500 has a range of 30 V to 1500 V. An operating area ranges from 2.25 to 3 times the expansion ratio.
Conceptual diagram of operating area
Five-Step Slew Rate Switching
In CV and CC modes, the speed at which the current or voltage changes can be set. This allows the user to set the optimum test conditions for DUT applications.
* Slew rate works in the following cases:
When the current or voltage value changes after changing the setting value.
When the current or voltage value is changed using external control.
When the current or voltage value is changed by turning the load on.
When the load is turned off.
Operation mode
The PXZ series has four operating modes. In addition, the I-V characteristic function can be set in the CC and CV modes.
Normal input mode. Current is controlled by the current set value.
PULSE
Controlled by pulse function.
SINE
Controlled by sine function.
I-V
Controlled by arbitrary I-V characteristics.
EXT
The current set value is controlled by an external voltage. The external voltage input to EXT CONT is treated as an absolute value and applied to the current set value.
Normal input mode. Power is controlled by the power set value.
EXT
The power set value is controlled by an external voltage.
Equipped with a touch panel display
By pressing or swiping the display with a finger, the user can select an item on the screen or set a numerical value. The display is pressure-sensitive and can be operated even with gloves on.
Priority Operation Mode
Immediately after turning on the load, the preferred operating mode can be set from CC, CR, and CP. When the input from the DUT reaches the set value, the operating mode switches automatically according to the DUT status. If the voltage of the connected DUT is higher than the voltage setpoint of the PXZ series, current flows from the DUT to the PXZ series. Select CC if a battery or power supply is connected as the DUT.
Contributing to Carbon Neutrality
The calculations were made assuming the maximum load power is 20 kW, and the device operates continuously for one month.
▲Comparison of PXZ20K-1500 and PLZ20005WH2 (without regenerative function)
The PXZ series can effectively regenerate the load power without dissipating it as heat. CO2 emissions can be reduced by approximately 5.67 tons per month (CO2 emission factor*: calculated with 0.438 kg [per kWh]). Furthermore, because the heat dissipation of the main unit is very low, the air conditioning costs can be significantly reduced.
* The CO2 emission factor is based on the national average for electric utility companies (FY2022 results) published by the Ministry of the Environment Government of Japan.
External Control Function
The EXT CONT connector on the rear panel can be used to control the PXZ series with external devices. The general-purpose digital input and output terminals can be assigned any function, facilitating system construction in combination with other measurement devices. Digital I/O is standard for both NPN and PNP-type PLCs. Analog I/O is isolated from output terminals as standard, allowing safe analog control from PLC.
12 V reference voltage available for digital input
10
–
–
–
Not used
11
–
–
A COM
Analog signal common
12
Analog
O
VMON
Voltage monitor
13
Analog
O
IMON
Current monitor
14
Digital
O
OUT Ch.4
General-purpose output terminal
15
Digital
O
OUT Ch.5
General-purpose output terminal
16
Digital
O
OUT Ch.6
General-purpose output terminal
17
–
–
DO COM
Digital output common
18
–
–
DI COM
Digital input common
19
Digital
I
IN Ch.4
General-purpose input terminal
20
Digital
I
IN Ch.5
General-purpose input terminal
21
Digital
I
H ALARM IN
HIGH alarm EXT HIGH occurrence
22
–
–
12V COM
12 V reference voltage common
23
–
–
A COM
Analog signal common
24
Analog
I
EXT CV
Voltage control in the constant voltage mode
25
Analog
I
EXT CC/CP
Current control in the constant current / power modes
General-purpose isolated digital input terminals are available for Ch.1 to Ch.5. Any setting value from the items listed on the right can be selected.
General-purpose isolated digital output terminals are available for Ch.1 to Ch.6. Any setting value from the items listed on the right can be selected.
Sequence function
Preset operations can be run continuously. Total of 30 programs, and up to 10,000 steps can be created for all programs. Programs stored in the unit’s memory, and data can be exported to a USB memory stick from the front panel.
Pre-charge Function *
The pre-charge function allows 5% of the rated current to flow in CC mode until the set CV voltage is reached. This function can be used to charge DC link capacitors during inverter evaluation in OBC development or charge the DC link capacitor for DC/DC converter evaluation to a desired voltage before starting discharge tests. This suppresses inrush current and prevents battery and DUT device deterioration. In addition, when conducting system verification with the PXZ as a battery simulator, the pre-charge function can be used to raise the voltage to a set level in advance, avoiding a situation where the test cannot be started due to false system diagnostics (wire breakage, battery failure, etc.).
* The interlock must be released and precharge enabled.
I-V characteristic function
By registering multiple arbitrary points on the I-V characteristics, arbitrary I-V characteristics can be set for each CC and CV operation mode. Arbitrary points can be registered from 3 to 100, making it possible to simulate the I-V characteristics of rechargeable batteries and other devices.
Regenerative DC Electronic Load
PXZ SERIES
Regenerative DC Electronic Load
PXZ SERIES
Equipped with Standard LAN Interface and VMCB Function
The PXZ series is equipped with LAN, USB, and RS232C interfaces as standard features. By using the feature of virtual multi-channel bus (VMCB), it allows you to control remotely and monitoring for 1-to-N as well as N-to-M for large-scale networks. This feature can also be used to save communication ports or to synchronize the control timing of multiple PXZ series units (up to 8 units). The PXB series manufactured by our company can also be mixed and matched for multi-channel connection.
When connecting the VMCB master unit via LAN
Communication monitoring function
This function monitors the communication status. For example, the alarm will be activated and the output will be turned off when the LAN cable is disconnected and the communication is not being confirmed within the specified time of setting. This function protects the operation from the uncontrolled condition, and it improves the system reliability.
Security for LAN connections
Access to the built-in web server can be restricted with a password. Also, when using VXI-11, HiSLIP, and SCPI-RAW for control, host restrictions can be set with the IP address. It is possible to prevent access from any terminal other than the ones registered as a host (up to 4 hosts can be registered).
Parallel operation can realize up to 25 units, 500 kW. *
Up to 25 units (500 kW) can be connected in parallel, including the master unit. The connection is a Master-slave parallel operation, and the panel of the master unit can control and display the entire system. Since it has an automatic recognition function, a large-capacity system can be constructed without complicated settings.
* Parallel operation is possible between models with different input rated voltages. ★ Please contact us if you wish to operate more than 10 units in parallel.
Data Logging Function
The data logging function allows the user to log measurement values (voltage, current, power, elapsed time, integrated current, and integrated power) in the internal memory, and display logged data on a list and graph forms. By setting measurement recording conditions, you can control the timing that measurements are recorded.
Synchronized operation function
When the PXZ series units are connected to each other with a synchronous operation signal cable, load on/off measurement and sequence synchronous operation can be performed from any of the PXZ series devices. Any of the PXZ series models can be connected to each other. Synchronized operation is possible even when devices are operating in parallel.
Synchronizing load on/off of multiple devices.
Synchronizing measurements.
Synchronizing the start time and resume time for sequences across multiple units.
Connect the OUT connector and IN connector of the EXT SYNC with a synchronized operation signal cables.
Saving Measurement Data
Measurement data can be stored in CSV format to a USB memory device.
Selectable power input
Three-phase 3-wire 200 V or Three-phase 3-wire 400 V models are available. Devices can be adapted to the international power supply requirements.
Reliable and solid performance even under high temperatures
Solid performance under operating temperatures of 0°C to 50°C (32 °F to 122 °F). Full performance even in harsh ambient temperature environments, such as when installed in equipment.
