DC Loads

From 200 to 28,800 W we offer different series for almost every DC test object the suitable electronic load, air-cooled or regenerative. As a special service we calibrate every new electronic load by delivery and especially a second time within the warranty period.

ERI Series - Regenerative

Features of performance

  • input voltage up to 400 V
  • load current up to 220 A
  • power up to 10,8 kW
  • Energy recycling to the local power grid
  • Low heat waste - silent - lab operation
  • CC - CV - CR - CP - CCV - CVC mode
  • Ethernet + USB + RS-232 + CAN as standard
  • GPIB optional
  • SCPI Programming with measurement function
  • Dynamic loads with synchronized DAQ
  • Data storage directly to USB mass storage device
  • Adjustable protections for voltage and current
  • Electronic protection
  • Digital input and programmable output
  • Galvanically isolated fast I/O Port optional

Details

Description
ERI Series Electronic Loads feed the consumed energy back to the local power grid. Another feature of these devices is an extensive variety of standard data interfaces. Apart from Ethernet, USB and RS-232 there is a standard CAN interface. GPIB can be installed as an option (ERI02). Programming is done in SCPI with an extensive command syntax.
Cooling
ERI loads recover the consumed energy instead of converting to thermal energy. Thus, electricity costs are reduced and the environment is only slightly warmed. As a consequence, in many cases air-condition is unnecessary. Energy recycling loads do not need powerful fans. That makes the devices acceptably quiet and therefore perfectly fit for laboratory operation.
Energy Recycling
The consumed energy is fed back to the mains supply with an efficiency of ca. 90 %. The operation in the sense of a power generation into the public electricity grid is not provided with these energy recycling loads. The load must be connected to a low-voltage mains supply with a fixed installed and separately fused supply line. The ERI load has a simple and non-redundant monitoring of the power supply. If limit values are exceeded, it switches off the power stage unit. This monitoring does not replace any grid or system protection which must be installed if necessary for the protection of persons and the local grid.
Functions
The units provide constant current, constant voltage, constant resistance and constant power mode. In addition, protections for current and voltage can be set in any mode. A data acquisition function allows to store measurement data on an external USB flash drive. Dynamic operation can be configured by up to 300 list point settings. The Electronic Load saves the synchronously acquired measurement values with timestamp. A configurable trigger model controls data acquisition as well as static and dynamic settings.
Loading Capacity
The type spectrum contains 3 power classes from 3,600 W to 10,800 W and input voltages of 120 V and 400 V.
Protections
  • Current protection
  • Power protection
  • Overtemperature protection
  • Protection of the GND lines at the I/O Port
  • Simple mains supply monitoring
Data Interfaces
  • Ethernet
  • USB
  • RS-232
  • CAN
  • GPIB (Option ERI02)
LabVIEW driver is certified by National Instruments.
Galvanically Isolated Fast I/O Port (Option ERI06)
Optional galvanically isolated I/O port to prevent ground loops, for following functions:
  • Load setting C and V
  • Analog setting of C and V protections
  • Load on-off
  • Voltage monitor output
  • Current monitor output
  • Trigger input
  • Trigger output
  • Digital input
  • Programmable control
Factory Calibration Certificate (FCC-ERIxx)
A free Factory Calibration Certificate (FCC) is supplied with the devices. The FCC meets the requirements according to DIN EN ISO 9000ff. This calibration certificate documents the traceability to national standards to illustrate the physical device in accordance with the international System of Units (SI). Within the warranty period we calibrate a second time for free. --> Conditions for a second free calibration The recommended calibration interval is 2 years.
Documentation
Each Electronic Load is supplied with a user manual as PDF file and printed General Safety Instructions, each in German and English.

Model overview

The table can be sorted via the column headers.
Name
Max V
Max W
Max A
120 V
3600 W
110 A
120 V
7200 W
220 A
120 V
10800 W
330 A
400 V
3600 W
45 A
400 V
7200 W
90 A
400 V
10800 W
135 A

PLA Series - Small

Features of performance

  • input voltage up to 800 V
  • load current up to 120 A
  • power up to 1200 W
  • I/O Port as standard
  • Optional Ethernet + USB + RS-232
  • Optional CAN Interface
  • Optional GPIB Interface (up from PLA4xx)
  • CC - CV - CR - CP Mode
  • Protections for current and voltage
  • Maximum Power Point Tracking (MPPT)
  • V/I Characteristic Function
  • Digital Master-Slave Operation (option PLA01 required)
  • Watchdog at remote control
  • SCPI programming with DAQ function
  • Dynamic loads
  • Depending on model, temporary overload capacity
  • Electronic protection
  • Silent fan cooling
  • 19 inch installation possible
  • Load inputs at front and rear side

Details

Description
PLA series electronic loads combine classic design, large display with modern interfaces and great functionality. The highlight of the PLI series is the extensive variety of optional interfaces. In addition to Ethernet, USB, RS-232 can be installed and also a CAN interface. In addition, for devices with 400 W GPIB is optionally available. I/O port ist standard. Programming is done in SCPI syntax.
Functions
The units provide constant current, constant voltage, constant resistance and constant power mode. In addition, protections for current and voltage can be set in any mode. Dynamic operation can be configured by up to 100 list point settings. A data acquisition function allows to save 100 measurement points (time, voltage, current) on an internal memory chip.
Special Functions
V/I Characteristic Function: In the V/I characteristic function, a sequence of voltage values is interpolated linearly to a sequence of current values (2 to 100 values each). Depending on the value of the input voltage, the electronic load sets the current which corresponds to the interpolated point of the characteristic. In this way non-linear characteristics such as diode characteristics can be simulated. Maximum Power Point Tracking (MPPT): An extensive Maximum Power Point Tracking (MPPT) function for testing photovoltaic panels can be activated. In variable sweep periods, the V/I characteristic of the panel is measured and stored. The sweep direction is selectable. The absolute maximum power found is controlled until the function is stopped or a certain minimum voltage is underrun. If the panel voltage is above the minimum voltage again, the load continues the sweep and control process. Digital Master-Slave Operation: To increase the power or current capability up to 5 electronic loads of equal type can be operated in parallel in Master-Slave mode as one system. The Master unit controls the total input current of the system. This unit also shows the system’s total measurement values at its display and returns them in case of query via one of the data interfaces. The voltage measured at the Master unit is the base for the controlled settings in voltage mode, power mode and resistance mode. For digital Master-Slave operation, option PLI01 (Ethernet + USB + RS-232) must be installed in the devices. H&H supplies the required cables (order no. K-MS-PLA and K-MS-CAN). Watchdog: When controlled via a data interface, a watchdog can be activated to protect the load input and thus the DUT, which switches off the load input if the communication interface fails or malfunctions.
Loading Capacity
The type spectrum contains models in the power categories 200 W, 400 W, 800 W and 1200 W. In addition, the models up to 300 V have an overload capability. The level and duration of the possible overload depends on the temperature of the power stage. Therefore the units can be used even for considerably more powerful applications for a short time.
Protections
  • Current limitation
  • Power limitation
  • Overtemperature protection
  • Overvoltage indicator
  • Undervoltage indicator
  • Protection of the GND lines at the I/O Port
Tools
The delivery includes comfortable tools for PC control.
I/O Port
The standard I/O Port provides the following functions:
  • Load setting C and V
  • Load on/off
  • Voltage monitor output
  • Current monitor output
Factory Calibration Certificate
A free Factory Calibration Certificate (FCC) is supplied with the devices. The FCC meets the requirements according to DIN EN ISO 9000ff. This calibration certificate documents the traceability to national standards to illustrate the physical device in accordance with the international System of Units (SI). Within the warranty period we calibrate a second time for free. --> Conditions for a second free calibration The recommended calibration interval is 2 years.
Documentation
We supply a user manual as pdf file and printed General Safety Instructions, each in German and English.

Model overview

The table can be sorted via the column headers.
Name
Max V
Max W
Max A
120 V
200 W
15 A
120 V
200 W
2 A
120 V
400 W
15 A
120 V
400 W
4 A
120 V
800 W
40 A
120 V
800 W
8 A
120 V
1200 W
60 A
120 V
1200 W
12 A
300 V
200 W
6 A
300 V
400 W
6 A
300 V
800 W
16 A
300 V
1200 W
24 A
60 V
200 W
30 A
60 V
200 W
4 A
60 V
400 W
30 A
60 V
400 W
8 A
60 V
800 W
80 A
60 V
800 W
16 A
60 V
1200 W
120 A
60 V
1200 W
24 A
800 V
200 W
3 A
800 V
400 W
3 A
800 V
800 W
8 A
800 V
1200 W
12 A

PLI Series - High Power

Features of performance

  • Voltage up to 800 Vtl_files/upload/produkte/Serie PLI/5HE_PLI_Gerät_01_22_5CW_LO.gif
  • Current up to 2,700 A
  • Power 600 W ... 28,800 W
  • Temporary power overload capacity, depending on model
  • High power density up to 2,100 W in 2 HU (3,200 W in 3 HU)
  • Ethernet + USB + RS-232 + CAN as standard (GPIB optional)
  • Intuitive operation
  • Quick operation by shortcuts
  • Current, voltage, resistance and power mode
  • MPPT Function
  • Digital Master-Slave operation
  • Energy storage test
  • Internal resistance measurement
  • Protections for current and voltage
  • Dynamic loads
  • SCPI programming with measurement function
  • USB stick as measurement data memory
  • Electronic protection
  • Analog measurement outputs for voltage and current
  • Analog control input
  • Digital input and programmable control output
  • Silent fan cooling

Details

Description
The PLI series of electronic loads provide a comfortable operation by a graphical user interface. The PLI series highlight is the extensive variety of standard interfaces. Apart from Ethernet, USB, RS-232 and Analog interface there is a standard CAN interface. Programming is done in SCPI syntax.
Functions
The units provide constant current mode, constant voltage mode, constant power mode and constant resistance mode. In addition, protections for current and voltage can be set in any mode. A static data acquisition function allows to store measurement data on an external USB flash drive. Dynamic operation can be configured by up to 300 list point settings. The Electronic Load saves the synchronously acquired measurement data with timestamp. A configurable trigger model controls data acquisition, static and dynamic settings.
Special Functions
 
  • Energy Storage Test/Discharge Function
An implemented test function enables discharging energy storages such as accumulators, batteries, ultracaps etc. in an easy way and supplying determined values like charge and energy.  
  • Internal Resistance Measurement
Measurement of the internal DC resistance of energy storage systems such as batteries, accumulators, capacitors, as well as cables, power supplies and so on.  
  • Watchdog Function
When the watchdog function is activated, the load input is switched off in the event of a faulty communication with the control PC in order to protect the connected test item.  
  • MPP Tracking (Optional)
The Electronic Load automatically searches for the Maximum Power Point of solar panels and self-adjusts as the sun's radiation changes.
Loading capacity
The model range covers power classes from  600 W, up to 28,000 W continuous power rating.In addition the models up to 300 V have an overload capability. The height and duration of the possible overload depends on the temperature of the power stage. The unit indicates the currently possible overload. Therefore the units can be used  even for considerably more powerful applications.
Protections
  • Current limitation
  • Power limitation
  • Overtemperature protection
  • Undervoltage indicator
  • Protection of the  GND lines at the  Analog I/O Port
Data Interfaces
The following interfaces are included as standard:
  • Ethernet
  • USB
  • RS-232
  • CAN
LabVIEW drivers are certified by National Instruments.
Analog I/O Port
The standard Analog I/O Port provides the following functions:
  • Load setting C and V
  • Analog setting the C and V protections
  • Load on-off
  • Voltage monitor output
  • Current monitor output
  • Trigger input
  • Trigger output
  • Programmable digital input and  control output
Galvanically isolated Analog I/O Port
For the galvanic isolation between the Analog I/O Port and the load terminals the PLI06 option can be installed. Isolation voltage is 800 V. Using this board also prevents ground loops.
Factory Calibration Certificate
A free Factory Calibration Certificate (FCC) is supplied with the devices. The FCC meets the requirements according to DIN EN ISO 9000ff. This calibration certificate documents the traceability to national standards to illustrate the physical device in accordance with the international System of Units (SI). Within the warranty period we calibrate a second time for free. --> Conditions for a second free calibration   The recommended calibration interval is 2 years.
Documentation
We supply a User Manual as pdf file and printed General Safety Instructions, each in German and English.

Model overview

The table can be sorted via the column headers.
Name
Max V
Max W
Max A
120 V
600 W
20 A
120 V
1400 W
40 A
120 V
2100 W
60 A
120 V
3200 W
150 A
120 V
4800 W
225 A
120 V
6400 W
300 A
120 V
8000 W
375 A
120 V
9600 W
450 A
120 V
11200 W
525 A
120 V
12800 W
600 A
120 V
14400 W
675 A
120 V
16000 W
750 A
120 V
17600 W
825 A
120 V
19200 W
900 A
120 V
20800 W
975 A
120 V
22400 W
1050 A
120 V
24000 W
1125 A
120 V
25600 W
1200 A
120 V
27200 W
1275 A
120 V
28800 W
1350 A
1200 V
2400 W
12 A
1200 V
3600 W
18 A
1200 V
4800 W
24 A
1200 V
6000 W
30 A
1200 V
7200 W
36 A
1200 V
8400 W
42 A
1200 V
9600 W
48 A
1200 V
10800 W
54 A
1200 V
12000 W
60 A
1200 V
13200 W
66 A
1200 V
14400 W
72 A
300 V
600 W
16 A
300 V
1400 W
32 A
300 V
2100 W
48 A
300 V
3200 W
60 A
300 V
3200 W
208 A
300 V
4200 W
90 A
300 V
4200 W
312 A
300 V
5600 W
120 A
300 V
5600 W
416 A
300 V
7000 W
150 A
300 V
7000 W
520 A
300 V
8400 W
180 A
300 V
8400 W
624 A
300 V
9800 W
210 A
300 V
9800 W
728 A
300 V
11200 W
240 A
300 V
11200 W
832 A
300 V
12600 W
270 A
300 V
12600 W
936 A
300 V
14000 W
300 A
300 V
14000 W
1040 A
300 V
15400 W
330 A
300 V
15400 W
1144 A
300 V
16800 W
360 A
300 V
16800 W
1248 A
300 V
18200 W
390 A
300 V
18200 W
1352 A
300 V
19600 W
420 A
300 V
19600 W
1456 A
300 V
21000 W
450 A
300 V
21000 W
1560 A
300 V
22400 W
480 A
300 V
22400 W
1664 A
300 V
23800 W
510 A
300 V
23800 W
1768 A
300 V
25200 W
540 A
300 V
25200 W
1872 A
60 V
600 W
60 A
60 V
600 W
10 A
60 V
1400 W
120 A
60 V
1200 W
20 A
60 V
2100 W
180 A
60 V
1800 W
30 A
60 V
3200 W
300 A
60 V
4800 W
450 A
60 V
6400 W
600 A
60 V
8000 W
750 A
60 V
9600 W
900 A
60 V
11200 W
1050 A
60 V
12800 W
1200 A
60 V
14400 W
1350 A
60 V
16000 W
1500 A
60 V
17600 W
1650 A
60 V
19200 W
1800 A
60 V
20800 W
1950 A
60 V
22400 W
2100 A
60 V
24000 W
2250 A
60 V
25600 W
2400 A
60 V
27200 W
2550 A
60 V
28800 W
2700 A
600 V
600 W
8 A
600 V
1400 W
16 A
600 V
2100 W
24 A
600 V
3200 W
40 A
600 V
3200 W
104 A
600 V
4200 W
60 A
600 V
4200 W
156 A
600 V
5600 W
80 A
600 V
5600 W
208 A
600 V
7000 W
100 A
600 V
7000 W
260 A
600 V
8400 W
120 A
600 V
8400 W
312 A
600 V
9800 W
140 A
600 V
9800 W
364 A
600 V
11200 W
160 A
600 V
11200 W
416 A
600 V
12600 W
180 A
600 V
12600 W
468 A
600 V
14000 W
200 A
600 V
14000 W
520 A
600 V
15400 W
220 A
600 V
15400 W
572 A
600 V
16800 W
240 A
600 V
16800 W
624 A
600 V
18200 W
260 A
600 V
18200 W
676 A
600 V
19600 W
280 A
600 V
19600 W
728 A
600 V
21000 W
300 A
600 V
21000 W
780 A
600 V
22400 W
320 A
600 V
22400 W
832 A
600 V
23800 W
340 A
600 V
23800 W
884 A
600 V
25200 W
360 A
600 V
25200 W
936 A
800 V
600 W
6 A
800 V
1400 W
12 A
800 V
2100 W
18 A
800 V
3200 W
30 A
800 V
4200 W
45 A
800 V
5600 W
60 A
800 V
7000 W
75 A
800 V
8400 W
90 A
800 V
9800 W
105 A
800 V
11200 W
120 A
800 V
12600 W
135 A
800 V
14000 W
150 A
800 V
15400 W
165 A
800 V
16800 W
180 A
800 V
18200 W
195 A
800 V
19600 W
210 A
800 V
21000 W
225 A
800 V
22400 W
240 A
800 V
23800 W
255 A
800 V
25200 W
270 A

ZS Series - Multi-Range

Features of performance

  • Voltage up to 800 V (1200V on request)
  • Currents up to 60 A
  • Power 500 W
  • Calibration a second time for free
  • Depending on model, temporary overload capacity
  • Current, voltage, resistance, power mode
  • Dynamic loads
  • SCPI programming with measurement function
  • Electronic protection
  • Analog measurement outputs for voltage and current
  • Analog control input
  • MPP tracking
  • Dynamic function with optional synchronized data logging

Details

Operating Modes
The ZS series electronic loads have the four operating modes constant current, voltage, power and resistance. In addition, depending on the operating mode limit values can be set for the maximum permissible current and the minimum permissible voltage. To increase the resolution for each device, along with the full setting range, a reduced setting of 1/3 of the rated current is available. The load can be preset even without a connected test unit. The display then shows the values directly in amps, ohms, volts or watts.
Dynamic and Control Time
The inbuilt modulator enables two independently adjustable currents and times from 100 μs ... 1 s. The control speed of the devices can be adjusted to the test unit in three stages (fast - medium - slow).
Protective Devices
The following protective devices are built in:
  • Overcurrent protection
  • Overpower protection
  • Overtemperature protection
  • Protection of the GND lines on the Analog I/O interface
Voltage Switching
A trigger voltage can be set for peak-free voltage hook-up. The current is enabled when the input voltage exceeds the trigger voltage.
Overload Capacity
Depending on the model the devices have temporary overload capacity. The level and duration of the possible overload depends on the operating temperature of the output stage. The device can therfore be used for significantly higher performance tasks.
Remote Control
Most load functions can be controlled remotely via Analog I/O Interface. The control inputs can be operated with TTL levels and 24 V from PLC controllers. A version (ZS06) which is electrically isolated from the load input is optionally available.
Analog Control
In the operating modes CC, CV and CP the setting value can be controlled by 0...5 V or 0...10 V DC.
Analog Measurement Outputs
There are 0...10 V analog measurement signals available for voltage, current and power. The GND terminals can float ±2 V with respect to the negative load input (also optionally isolated - Option ZS06).
Cooling
The units are air-cooled. To keep the operating noise low, the fans are temperature and current-dependently controlled. For better utilization of the maximum possible overload capacity the fans can be set to full power.
Mechanics
The ZS is a sturdy 19“ rack design and can also be used as a table-top device. No separate installation kits are needed for 19“ rack installation.
Connections
All connections are at the rear side. The current connections are copper rails or safety sockets.
Safety
Covers are available as contact protection for units for dangerous contact voltages.
Interfaces (optional)
  • RS-232 + USB
  • GPIB
  • Ethernet-RS-232 Converter
  • System Interface Cable or Fiber Optic
  • Data Acquisition Tool
Hardware Expansions (optional)
  • Electrically Isolated Analog I/O Interface
  • Power I/O Card
  • Analog I/O Extension Card
  • Zero-Volt Option
Factory Calibration Certificate
A free Factory Calibration Certificate (FCC) is supplied with the devices. The FCC meets the requirements according to DIN EN ISO 9000ff. This calibration certificate documents the traceability to national standards to illustrate the physical device in accordance with the international System of Units (SI). Within the warranty period we calibrate a second time for free. --> Conditions for a second free calibration The recommended calibration interval is 2 years.
Software Tools
The H&H Homepage has a program library for Windows with a controll tool an LabVIEW drivers.
Documentation
We supply a User Manual as pdf file and printed General Safety Instructions, each in German and English.

Model overview

The table can be sorted via the column headers.
Name
Max V
Max W
Max A
120 V
1000 W
30 A
120 V
1000 W
30 A
300 V
500 W
12 A
60 V
1000 W
60 A
60 V
1000 W
60 A
600 V
500 W
6 A
800 V
500 W
4.5 A

End Of Life-Announcement:

We will stop the production of the ZS single-range devices by 31.12.2018. The successor series is the PLI series. A comparison document with functions and commands of both series can be found here. The ZS5xx-3 and -4 multi-range devices will be kept in stock.

Short inquiry

With this form you can send us a short inquiry. Please fill in all relevant technical parameters.

Accept privacy policy