Kewell S7200 | Bidirectional DC Power Supply & Load
- ✓ Bidirectional Programmable AC Power Supply
- ✓ Voltage range: 0 - 450 V
- ✓ Current: up to 342 A
- ✓ Power: up to 225 kW
Programmable Bidirectional DC Power Supply with integrated DC Load
Flexibility and Precision in Bidirectional Power Supply
The bidirectional DC power supply and load of the KEWELL S7200 Series combines a programmable DC power supply with an electronic DC load in a single, high-performance device. It is the ideal solution for applications where power, voltage, energy, and dynamic load changes must be controlled with high precision. With high efficiency, regenerative architecture, and flexible interface technology, the series is perfectly suited for laboratories, development, test fields, and quality assurance.
Versatile Functions for Testing, Development, and Laboratory Operation
The devices operate flexibly as a DC source or DC load and support multiple combinable operating modes (CV, CC, CP, CR). This enables precise implementation of a wide variety of test procedures. Functions such as precise charging, regenerative energy feedback, and the generation of complex signals, waveforms, and user-defined profiles allow realistic test sequences with reproducible output performance. Powerful software for automation and documentation complements the system. Optional interfaces such as GPIB provide additional integration options.
More Power for Your Development – Test Faster, Validate Better
The S7200 Series significantly increases efficiency in the testing process. It integrates seamlessly into existing systems and delivers stable, reproducible results. Flexible integration into automated test sequences shortens development cycles and significantly increases throughput. Robust technology supports reliable grid energy feedback, while features such as battery simulation and bidirectional charging provide additional flexibility. Clear advantages for teams aiming to build scalable and future-proof test environments.
Targeted Application Focus of the Model Variants
The NG models are designed as universal bidirectional source/load units and are particularly suitable for testing applications in photovoltaics, electromobility, and power electronics, as well as for laboratory and test field use.
The PG models extend this functional scope with specialized battery test functions and suitable options that enable detailed energy storage characterization, for example through simulations using the “Automotive Power Curve” function. Applications in power grids and energy storage systems can also be implemented in a targeted manner.
Contact us now for expert advice and find the right solution for your tests together with us!
Variants
Specifications
| Specification | Value |
|---|---|
| Performance Data | |
| Rated power | 15 kW / 20 kW / 30 kW (depending on model) |
| Output voltage | 0 … 800 V / 0 … 1200 V / 0 … 2400 V |
| Output current | up to 240 A (depending on model) |
| Bidirectional operation | source & sink in one device |
| Maximum power density | up to 30 kW in 3U height |
| Control & Dynamic Behavior | |
| Dynamic response time | < 500 µs during load changes |
| Voltage slew rate | 0.001 V/ms to 500 V/ms (depending on model) |
| Current slew rate | up to 450 A/ms (depending on model) |
| Operating Modes (Source & Load) | |
| Basic modes | CC / CV / CP / CR |
| Combined modes | CV+CC, CV+CR, CC+CR, CV+CC+CP+CR |
| AC Input | |
| Input voltage | 342 … 528 VAC |
| Input frequency | 47 … 63 Hz |
| Power factor | > 0.99 |
| Efficiency & Regeneration | |
| Efficiency | up to 95.5% (depending on model) |
| Regenerative operation | integrated energy feedback to the grid (source/sink) |
| Measurement & Resolution | |
| Voltage resolution | 0.001 V |
| Current resolution | 0.001 A |
| Power resolution | 0.1 W |
| Protection Functions | |
| OVP | Overvoltage Protection |
| OCP | Overcurrent Protection |
| OPP | Overpower Protection |
| OTP | Overtemperature Protection |
| Reverse polarity protection | |
| Grid and system protection | |
| Communication & Control | |
| Interfaces | RS232, LAN, USB, Analog I/O, Digital I/O |
| Optional | GPIB interface (NG & PG models) |
| Simulation Functions | |
| Battery simulation | various cell chemistries |
| IV curve simulation | single-point, multi-point, multi-step |
| PV shadow and daylight simulation | |
| Automotive Power Curve | ISO16750-2, LV123, DIN40839 |
| Dimensions & Weight | |
| Dimensions | 669 mm (Tiefe) × 445 mm (Breite) × 130 mm (Höhe) |
| Weight | 37 kg bzw. 40,5 kg (modellabhängig) |
| Environment Conditions | |
| Operating temperature | 0 … 40 °C |
| Storage temperature | –20 … +70 °C |
| Humidity | 0 … 90 % RH, not condensing |
| Maximum operating altitude | 2000 m above sea level |
Options & Accessories
| Manufacturer number | Name |
|---|---|
| „NG“-Models | GBIP interface, Battery test soft-start box |
Scope of Delivery
| Scope of delivery |
|---|
| Device(s) of the S7200 series |
| Test and quality certificate |
| Handles for device installation |
| USB stick with software and user manual |
| Network/LAN cable, length approx. 3 m |
| Set of small parts - screws and nuts for the DC outputs, plug/clamp terminals etc. (details according to packing list) |
Applications
| Application examples |
|---|
| Battery testing and energy storage validation |
| Testing of DC power supplies, laboratory power supplies, and chargers |
| Development of power modules and e-mobility components |
| Simulation of load profiles, output power, current levels, and dynamic signal |
| Laboratory and test-field applications in measurement technology, power engineering, and the energy sector |
Links & Downloads
Available documents (Subject to change)
Supplier
Kewell Technology Co, Ltd, founded in 2011, is a pioneering manufacturer of intelligent manufacturing equipment and testing solutions for various industries.
The product lines are divided into the following areas:
- Power supplies for test systems
- Hydrogen energy test equipment and intelligent manufacturing equipment
- Power semiconductor and production line test systems