DF-S Series AC LABORATORY POWER SUPPLIES
Maximum ratings for the series (depending on model): 300 Vrms L-N / 42 A / 5 kVA / ØPL = 1.66 €/VA
| Output phases: | 1 |
| Voltage range: | 0 ... 300Vrms L-N |
| Current range: | 0 ... 42A L-N |
| Frequency range: | 45Hz ... 250Hz |
| Power range: | 0 ... 5kVA |
| Cabinet: | Table-top unit |
| Regulation: | U |
| Load regulation U: | ≤1% |
| Mains regulation U: | ≤1% |
| Frequency stability: | ≤0.01% |
| Voltage stability: | ±1% |
| Harmonic distortion: | ≤2% |
| Crown factor deviation: | ≤2% |
| Recovery time (10% → 90% load): | ≤15ms |
| Display accuracy U: | ±0.5% FS + 5 dig |
| Display accuracy I: | ±0.5% FS + 5 dig |
| Display accuracy P: | ±0.5% FS + 5 dig |
| Display accuracy F: | ±0.01% FS + 5 dig |
| Setting accuracy U: | ±1% FS |
| Setting accuracy F: | ±0.1% FS |
| Ext. control analogue: | No |
| Ext. feedback analogue: | No |
| RS232: | Yes (51XXX models only) |
| RS485: | No |
| RS422: | No |
| Open protocol: | Yes (51XXX models only) |
| Modbus RTU: | No |
| SCPI: | No |
| Interlock: | Yes* |
| External Output On/Off: | Yes* |
* Optional
Versatile testing, convenient operation: The DF-S Series “ alternating current ” laboratory power supplies bring a flexibly adjustable “ AC ” power supply to your laboratory workstation. With sinusoidal output voltage, a wide frequency range, and a compact design, they support functional tests, stress tests, and measurement tasks without requiring large-scale industrial equipment.
Voltage and frequency can be adjusted directly on the front panel. This allows you to keep an eye on output values and device status. With a DF-S51 model, you can integrate the power supply into your own test programs via RS-232. The DF-S50 models are available for applications without external digital control.
This series operates in constant-voltage (CV) mode. The frequency range is 45 Hz to 250 Hz. The output is potential-free by default and can be grounded upon request. Models in the DF-S51 group feature an RS-232 interface with a documented proprietary protocol. Models in the DF-S50 group do not have a digital interface.
Performance and Overload Capacity
The permissible combination of voltage, current, and apparent power is specified in the data for the selected model. The higher output current is available in the lower voltage range. The overload capacity of 300% of the rated power is available for 2 seconds and is not a continuous power rating. For continuous operation, the rated values and the specified ambient and cooling conditions must be observed.
The standard models currently listed range up to 3 kVA. The largest listed model provides 25 A in the lower voltage range and 12.5 A in the higher voltage range. The maximum values for the series listed above also include custom configurations. These values are not achievable with every standard model at the same time.
Signal Quality and Dynamic Range
Short response times support dynamic test sequences: The recovery time is ≤15 ms for a load change from 10% to 90%. With digital control, the command response time is less than 20 ms.
Additional options
[A] External Output Enable (optional)
The optional external output enable integrates the power supply into your test setup. The [A4] option available in the online store is controlled by a 24V signal. The connection specifications for the ordered version apply to the wiring and the enable status.
Output Configuration By default, the AC output is potential-free. A grounded version can be provided upon request. The protection and grounding configuration of the test setup must match the ordered version. The device-specific connection documentation is authoritative.
The model overview below is updated from our Laborance online store. There you will find the standard models and how to order them. For custom specifications or configurations, please contact us with the requirements for your application.
| Model | Price | Output type | Output voltage | Output current 0 ... 150Vrms L-N | Output current 0 ... 300Vrms L-N | Power | Output frequency | Display resolution F | Display resolution U | Display resolution I | Display resolution P | Voltage stability | Frequency stability | Harmonic distortion | Crown Factor Deviation | Load regulation U | Load regulation I | Line regulation U | Line regulation I | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DF-S50012 | 1.440,00 € | Variable AC true sine wave 1 phase | 0 ... 300Vrms L-N | 0 ... 10A | 0 ... 5A | 0 ... 1.2kVA | 45Hz ... 250Hz | 0.01Hz | 10mV | 1mA | 1W | ±1% | ≤0.01% | ≤2% | ≤2% | ≤1% | ≤1% | |||
| DF-S5102 | 1.770,00 € | Variable AC true sine wave 1 phase | 0 ... 300Vrms L-N | 0 ... 16.8A | 0 ... 8.4A | 0 ... 2kVA | 45Hz ... 250Hz | 0.01Hz | 10mV | 1mA | 1W | ±1% | ≤0.01% | ≤2% | ≤2% | ≤1% | ≤1% | |||
| DF-S5103 | 2.070,00 € | Variable AC true sine wave 1 phase | 0 ... 300Vrms L-N | 0 ... 25A | 0 ... 12.5A | 0 ... 3kVA | 45Hz ... 250Hz | 0.01Hz | 10mV | 1mA | 1W | ±1% | ≤0.01% | ≤2% | ≤2% | ≤1% | ≤1% | |||
| DF-S500035 | 1.100,00 € | Variable AC true sine wave 1 phase | 0 ... 300Vrms L-N | 0 ... 3A | 0 ... 1.5A | 0 ... 350VA | 45Hz ... 250Hz | 0.01Hz | 10mV | 1mA | 1W | ±1% | ≤0.01% | ≤2% | ≤2% | ≤1% | ≤1% | |||
| DF-S51005 | 1.270,00 € | Variable AC true sine wave 1 phase | 0 ... 300Vrms L-N | 0 ... 4.2A | 0 ... 2.1A | 0 ... 500VA | 45Hz ... 250Hz | 0.01Hz | 10mV | 0.1mA | 1W | ±1% | ≤0.01% | ≤2% | ≤2% | ≤1% | ≤1% | |||
| DF-S50007 | 1.230,00 € | Variable AC true sine wave 1 phase | 0 ... 300Vrms L-N | 0 ... 6A | 0 ... 3A | 0 ... 700VA | 45Hz ... 250Hz | 0.01Hz | 10mV | 1mA | 1W | ±1% | ≤0.01% | ≤2% | ≤2% | ≤1% | ≤1% | |||
| DF-S5101 | 1.430,00 € | Variable AC true sine wave 1 phase | 0 ... 300Vrms L-N | 0 ... 8.4A | 0 ... 4.2A | 0 ... 1kVA | 45Hz ... 250Hz | 0.01Hz | 10mV | 0.1mA | 1W | ±1% | ≤0.01% | ≤2% | ≤2% | ≤1% | ≤1% |