AC, DC and AC + DC
Alternating voltage, direct voltage and superimposed signal components can be configured using separate setpoints.
EAC-S – Linear Single-Phase AC Power Source up to 10 kVA
For repeatable supply, line-disturbance and device testing with a controlled output waveform.
The galvanically isolated linear amplifier converts the internally generated reference curve directly into a regulated output voltage. Static voltage and current regulation of 0.1%, low distortion and controlled phase positioning provide stable and traceable test conditions.
User-defined waveforms
In addition to sine, square and triangle signals, three memory locations support custom 16-bit WAV waveforms.
Stand-alone test sequences
The optional SD-card function supports script control, data logging and repeatable sequences without a permanently connected controller.
Flexible remote control
Optional analogue, IEEE488, RS232, RS485, USB and LAN interfaces support integration into automated test systems.
Personal project consultation
Do you need support selecting the right power supply? Our technical specialists will provide personal advice tailored to your application.
Select the appropriate technical configuration or access product documentation directly.
ART. NO.
Description
Current [A]
Power [P]
Voltage [V]
EAC-S 250
|
Description
EAC-S 250 Linear 1-phase AC power source, 250 VA, 0–300 VAC / 0–425 VDC, 0–3 A, 4U
|
Current [A]
3
|
Power [P]
250
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 500
|
Description
EAC-S 500 Linear 1-phase AC power source, 500 VA, 0–300 VAC / 0–425 VDC, 0–6 A, 4U
|
Current [A]
6
|
Power [P]
500
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 1000
|
Description
EAC-S 1000 Linear 1-phase AC power source, 1,000 VA, 0–300 VAC / 0–425 VDC, 0–10 A, 6U
|
Current [A]
10
|
Power [P]
1000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 2000
|
Description
EAC-S 2000 Linear 1-phase AC power source, 2,000 VA, 0–300 VAC / 0–425 VDC, 0–15 A, 6U
|
Current [A]
15
|
Power [P]
2000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 3000
|
Description
EAC-S 3000 Linear 1-phase AC power source, 3,000 VA, 0–300 VAC / 0–425 VDC, 0–20 A, 10U
|
Current [A]
20
|
Power [P]
3000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 4000
|
Description
EAC-S 4000 Linear 1-phase AC power source, 4,000 VA, 0–300 VAC / 0–425 VDC, 0–30 A, 16U
|
Current [A]
30
|
Power [P]
4000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 5000
|
Description
EAC-S 5000 Linear 1-phase AC power source, 5,000 VA, 0–300 VAC / 0–425 VDC, 0–35 A, 16U
|
Current [A]
35
|
Power [P]
5000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 6000
|
Description
EAC-S 6000 Linear 1-phase AC power source, 6,000 VA, 0–300 VAC / 0–425 VDC, 0–40 A, 16U
|
Current [A]
40
|
Power [P]
6000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 7000
|
Description
EAC-S 7000 Linear 1-phase AC power source, 7,000 VA, 0–300 VAC / 0–425 VDC, 0–50 A, 20U
|
Current [A]
50
|
Power [P]
7000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 8000
|
Description
EAC-S 8000 Linear 1-phase AC power source, 8,000 VA, 0–300 VAC / 0–425 VDC, 0–60 A, 20U
|
Current [A]
60
|
Power [P]
8000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 9000
|
Description
EAC-S 9000 Linear 1-phase AC power source, 9,000 VA, 0–300 VAC / 0–425 VDC, 0–70 A, 25U
|
Current [A]
70
|
Power [P]
9000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S 10000
|
Description
EAC-S 10000 Linear 1-phase AC power source, 10,000 VA, 0–300 VAC / 0–425 VDC, 0–80 A, 25U
|
Current [A]
80
|
Power [P]
10000
|
Voltage [V]
300
|
Linear 1-ph AC Source
Technical Data
Height
6
4
Product category
AC Power Supply
Type of AC source
Current-controlled CC
Single-phase
EAC-S overview
The EAC-S is a linear programmable single-phase AC power source for simulating and testing electrical supply networks. The standard models cover 250 to 10,000 VA, output currents up to 80 A and standard ranges of 0 to 300 VAC and 0 to 425 VDC. Optional output stages extend the range to 500 or 700 VAC and 700 or 1,000 VDC. The standard frequency range extends to 500 Hz and can be increased to 1,000 or 2,000 Hz. Lower-power models are supplied as 19-inch rack units, while higher power levels are integrated into 19-inch cabinets. In addition to local operation, the series supports controlled phase positioning, superimposed DC components, custom waveforms and optional interfaces and memory functions for automated test systems.
Key benefits
Linear power amplifier
The reference curve is reproduced by an analogue power amplifier, supporting low distortion and repeatable signal shapes.
Stable regulation
Static voltage and current regulation are both specified at 0.1%, limiting deviations caused by line and load changes.
Extended operating ranges
Voltage options up to 700 VAC and frequency options up to 2,000 Hz support application-specific supply profiles.
Integrated measurements
The source measures RMS, DC and peak values as well as active, reactive and apparent power.
Custom signal profiles
User waveforms contain 3,600 signed 16-bit samples and can be stored in three internal memory locations.
Test-system integration
Optional digital and analogue interfaces, synchronisation and an ATE version support automated system integration.
Operating principle of the linear AC power source
Following galvanic isolation, the input supply is rectified and applied to an analogue power amplifier. Its input signal is generated from an internal waveform table containing one complete period of the selected curve and is multiplied by the configured amplitude.
The output can use standard waveforms, internally stored user curves or an externally supplied oscillator signal. An adjustable DC component can be superimposed on the AC voltage. When the configured current limit is exceeded, the source reduces its output amplitude and operates in current limiting mode.
Practical benefit: The linear output architecture is suited to tests where waveform quality, controlled phase positioning and traceable voltage profiles are more important than particularly high efficiency.
Models and technical specifications
All listed standard models provide an output range of 0 to 300 VAC and 0 to 425 VDC. The maximum current setting, mechanical format, weight and mains input depend on the selected power rating.
| Model | Power | Standard output | Max. current | Mechanical format | Weight | Standard mains input |
|---|---|---|---|---|---|---|
| EAC-S 250 | 250 VA | 0–300 VAC 0–425 VDC |
0–3 A | 19 in × 4 U × 434.5 mm | 30 kg | 1 × 230 VAC |
| EAC-S 500 | 500 VA | 0–300 VAC 0–425 VDC |
0–6 A | 19 in × 4 U × 434.5 mm | 33 kg | 1 × 230 VAC |
| EAC-S 1000 | 1,000 VA | 0–300 VAC 0–425 VDC |
0–10 A | 19 in × 6 U × 434.5 mm | 60 kg | 1 × 230 VAC |
| EAC-S 2000 | 2,000 VA | 0–300 VAC 0–425 VDC |
0–15 A | 19 in × 6 U × 434.5 mm | 83 kg | 2 × 400 VAC |
| EAC-S 3000 | 3,000 VA | 0–300 VAC 0–425 VDC |
0–20 A | 19 in × 10 U × 434.5 mm | 101 kg | 2 × 400 VAC |
| EAC-S 4000 | 4,000 VA | 0–300 VAC 0–425 VDC |
0–30 A | 19 in × 16 U × 600 mm | 239 kg | 3 × 400 VAC |
| EAC-S 5000 | 5,000 VA | 0–300 VAC 0–425 VDC |
0–35 A | 19 in × 16 U × 600 mm | 252 kg | 3 × 400 VAC |
| EAC-S 6000 | 6,000 VA | 0–300 VAC 0–425 VDC |
0–40 A | 19 in × 16 U × 600 mm | 264 kg | 3 × 400 VAC |
| EAC-S 7000 | 7,000 VA | 0–300 VAC 0–425 VDC |
0–50 A | 19 in × 20 U × 800 mm | 287 kg | 3 × 400 VAC |
| EAC-S 8000 | 8,000 VA | 0–300 VAC 0–425 VDC |
0–60 A | 19 in × 20 U × 800 mm | 363 kg | 3 × 400 VAC |
| EAC-S 9000 | 9,000 VA | 0–300 VAC 0–425 VDC |
0–70 A | 19 in × 25 U × 800 mm | 418 kg | 3 × 400 VAC |
| EAC-S 10000 | 10,000 VA | 0–300 VAC 0–425 VDC |
0–80 A | 19 in × 25 U × 800 mm | 437 kg | 3 × 400 VAC |
Voltage options: /V500 extends the output to 0–500 VAC and 0–700 VDC with a 40% reduction in maximum current. /V700 provides 0–700 VAC and 0–1,000 VDC with a 50% reduction in maximum current.
Regulation and signal dynamics
. Dynamic regulation is stated as five periods. Applications involving rapid voltage changes must therefore consider the period duration of the configured output frequency.
| Characteristic | Value | Practical relevance |
|---|---|---|
| Static voltage regulation | 0.1% | Limits output variation caused by changes in the mains input. |
| Static current regulation | 0.1% | Supports repeatable current limiting with changing devices under test. |
| Dynamic regulation | 5 periods | The regulation time depends on the configured output frequency. |
| Ripple | 0.3% at 50 Hz | Describes the residual ripple component of the regulated output signal. |
| Distortion at Pmax | 0.1% | Supports controlled waveform reproduction at nominal output power. |
| AC and DC voltage programming accuracy | 100 mV | Defines the accuracy of the programmed voltage setpoint. |
| Frequency programming accuracy | 0.1 Hz | Allows fine adjustment around nominal and non-standard frequencies. |
| Activation-phase programming accuracy | 0.1° | Supports phase-related switching and interruption tests. |
Operating modes and programmable functions
| Function | Availability | Description |
|---|---|---|
| AC operation | Standard | Adjustable AC voltage using sine, square, triangle or user-defined waveforms. |
| DC operation | Standard | Positive or negative DC voltage within the selected output range. |
| AC + DC | Standard | An adjustable DC component can be superimposed on the AC waveform. |
| Variable frequency | Standard / option | Up to 500 Hz as standard and optionally up to 1,000 or 2,000 Hz. |
| Phase control | Standard | Adjustable phase position and controlled activation or deactivation of the output waveform. |
| External oscillator | Option /EXT/OSZ | An external ±10 V reference signal is amplified and applied to the power output. |
| User waveforms | With memory card or digital interface | Three non-volatile waveform memories for WAV files containing 3,600 samples. |
| DIP | Option, digital interface required | Interrupts the output for a defined number of half cycles or a programmed time. |
| GATE and APuls | Option, digital interface required | Generates timed output activation and adjustable pulse sequences. |
| Script mode | SD-card option | Runs sequences containing setpoints, delays, loops, synchronisation and user actions. |
| Data logging | SD-card option | Stores operating status and measured values in a text file at adjustable intervals. |
Typical applications
Within a test system, the EAC-S provides controlled power to the device under test and reproduces defined voltages, frequencies, waveforms, phase positions and temporary line disturbances.
AC-input testing for automotive and e-mobility
Chargers, power supplies and electronic control units are powered using controlled voltage, frequency and interruption profiles.
Aerospace supply testing
Avionics, power supplies and electrical components can be evaluated with 400-Hz supplies and alternative waveforms.
Production and end-of-line testing
Repeatable setpoints, digital remote control and stored sequences support automated functional and quality tests.
Development and qualification
Power supplies, transformers, filters and electrical assemblies can be evaluated under varying voltage, frequency and waveform conditions.
Line interruption and immunity tests
Controlled dropouts, activation phases and timed voltage release test the response to temporary supply disturbances.
Testing with non-sinusoidal voltages
Square, triangle and custom curves support testing with distorted or application-specific supply signals.
Interfaces, software and automation
Standard operation is provided through the graphical front panel. Several optional control and synchronisation methods are available for automated test and ATE systems.
| Interface or function | Availability | Technical use |
|---|---|---|
| Graphical front panel | Standard | Local configuration of voltage, current limit, frequency, phase, waveform and memories. |
| RS232 | Option /LTRS232 | Serial remote control using the ASCII command protocol. |
| RS485 | Option /LTRS485 | Addressable communication with multiple devices on a shared bus. |
| USB | Option /USB | Virtual COM port using the same command structure as the RS232 interface. |
| LAN | Option /LAN | TCP/IP communication and direct control through port 10001. |
| IEEE488 / GPIB | Option /LT | Integration into established laboratory and measurement systems using addressable bus communication. |
| Galvanically isolated analogue interface | Option /ATI 5 or /ATI 10 | Setpoint control and monitor outputs using 0–5 V or 0–10 V signals. |
| Synchronisation input | Option /SYNC E | Synchronises the output curve to the rising edge of an external source. |
| Synchronisation output | Option /SYNC A | Provides a 3.3-V synchronisation signal for triggering external equipment. |
| SD-card slot | Option /SD | Stores user waveforms, scripts, measured data and device-specific test sequences. |
| Interlock | Option /INTLOCK | External release or safety shutdown of the power stage. |
| ATE version | Option /ATE | Version without front-panel controls, with the power output and control arrangement designed for system integration. |
Digital communication uses an ASCII protocol with commands for setpoints, measurements, waveforms, phase position, output activation and status queries.
Synchronisation and three-phase configuration
Three individual EAC-S units can be combined into a three-phase supply system using the optional synchronisation function. One source provides the reference signal, while the other two follow through their synchronisation inputs. All units must be configured to the same output frequency.
- The neutral conductors of all three outputs must be connected together.
- The phase positions are configured individually to create a system with 120° phase displacement.
- Voltage and current limiting are adjusted separately on the source assigned to each phase.
- This arrangement synchronises three individual phases and does not constitute parallel power operation.
The output wiring, protective measures and circuit protection must be evaluated for the specific project and implemented by qualified electrical personnel.
Installation and infrastructure
| Requirement | Configuration |
|---|---|
| Mains frequency | 47–63 Hz |
| Mains input | Depending on model: 1 × 230 VAC, 2 × 400 VAC or 3 × 400 VAC; optional inputs for 3 × 208, 3 × 440 or 3 × 480 VAC. |
| Cooling | Fan cooling |
| Operating temperature | 0 to 50 °C |
| Storage temperature | −20 to 70 °C |
| Humidity | Below 80% |
| Operating altitude | Below 2,000 m |
| Protection class | Protection class I with galvanic isolation between the input and output circuits. |
| Protective earth | Operation is only permitted with PE connected. Units with increased leakage current include an additional grounding connection. |
| Installation environment | Temperature- and humidity-controlled indoor environment protected from liquids and extreme humidity. |
The source must be operated directly from the intended mains supply.
Protection and safety functions
Device monitoring
The technical specifications list OT and OP protection functions for monitoring the power stage.
Adjustable current limit
If the configured current limit is exceeded, the source reduces the output amplitude.
Electronic standby
The output can be disabled locally, through an interface or as part of a script.
Optional interlock
An external release signal can disable the power stage while the control system and settings remain active.
Galvanic isolation
Input and output are galvanically isolated, while the protective-earth connection remains mandatory for safe operation.
Status and error reporting
Overload, shutdown, current limiting and additional operating states are displayed locally and available through status queries.
For the EAC-S 250 through EAC-S 3000, also a time-limited peak-power capability:
| Model | Nominal power | Peak power |
|---|---|---|
| EAC-S 250 | 250 VA | 350 VA |
| EAC-S 500 | 500 VA | 750 VA |
| EAC-S 1000 | 1,000 VA | 1,500 VA |
| EAC-S 2000 | 2,000 VA | 2,500 VA |
| EAC-S 3000 | 3,000 VA | 3,500 VA |
The peak-power condition may be maintained for up to ten seconds.
EAC-S FAQ
Which EAC-S model is suitable for my application?
Selection is based on the required apparent power, maximum output current, voltage range, mains input and available installation space.
Can the EAC-S generate DC voltage?
Yes. The series supports pure DC operation and an adjustable DC voltage superimposed on an AC waveform.
Which output frequencies are available?
The standard range extends to 500 Hz. Options /F1000 and /F2000 increase it to 1,000 and 2,000 Hz.
Can custom waveforms be generated?
Yes. A waveform contains 3,600 signed 16-bit samples and can be transferred by SD card or digital interface.
Can the source execute automated test sequences?
With the optional SD-card function, scripts can contain setpoints, delays, loops, synchronisation and output switching.
Is three-phase operation possible?
Three individual units can be combined using the optional synchronisation function and individually configured phase positions.
Which interfaces are available?
Optional interfaces include RS232, RS485, USB, LAN, IEEE488 and galvanically isolated 0–5 V or 0–10 V analogue control.
What must be considered with the high-voltage options?
Options /V500 and /V700 increase the output voltage but reduce the maximum available current by 40% and 50%, respectively.
Technical consultation and project enquiry
Selecting the correct model requires consideration of output power, maximum current, voltage and frequency range, waveform requirements, interfaces, mains connection and installation conditions.
ET System supports the technical configuration, selection of options and integration of the EAC-S into laboratory, ATE and production test systems.
Discuss your technical requirements with ET System