AC, DC and AC+DC output
Three output types provide pure AC voltage, bipolar DC voltage and combined signals.
TH7200 – Linear AC/DC Power Source up to 1 kVA
For reproducible supply testing of power supplies, components and electrical equipment.
A linear amplifier combined with an arbitrary waveform generator produces low-distortion output signals with short response times. Two selectable voltage ranges provide either higher output current or an extended voltage range to match the required operating point.
Programmable waveforms
Built-in waveforms and imported CSV data reproduce normal and disturbed supply conditions.
600-step sequences
Voltage, frequency, phase and time can be combined into repeatable automated test profiles.
Standard remote control
RS232, LAN and USB support integration into laboratory software and automated test systems.
Personal project consultation
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ART. NO.
Description
Current [A]
Power [P]
Voltage [V]
TH7205
|
Description
TH7205 – AC/DC source, 500 VA AC / 350 W DC, 0–300 VAC / ±424 VDC, 1–1,000 Hz, up to 5 A AC / 3.5 A DC, 4 U
|
Current [A]
5
|
Power [P]
500
|
Voltage [V]
300
|
Linear AC Soruce
Technical Data
Type of AC source
Single-phase
TH7210
|
Description
TH7210 – AC/DC source, 1,000 VA AC / 700 W DC, 0–300 VAC / ±424 VDC, 1–1,000 Hz, up to 10 A AC / 7 A DC, 4 U
|
Current [A]
10
|
Power [P]
1000
|
Voltage [V]
300
|
Linear AC Soruce
Technical Data
Type of AC source
Single-phase
TH7200 overview
The TH7200 is a single-phase, programmable, linear AC/DC power source for precise simulation of electrical supply conditions. The TH7205 and TH7210 provide 500 VA and 1,000 VA in AC operation and 350 W and 700 W in DC operation. AC voltage can be set up to 300 V AC, while bipolar DC voltage extends to ±424 V DC. The frequency range from 1 Hz to 1,000 Hz covers standard mains frequencies as well as low-frequency interference and supply simulations.
Its linear amplifier architecture achieves total harmonic distortion of 0.2% or less and a typical response time of 30 µs. Programmable waveforms, 600 steps, power abnormality simulation, phase control and integrated measurements support repeatable testing in development, quality assurance and production. Front and rear outputs simplify both laboratory setups and integration into test systems.
Key benefits
Linear output stage
Linear amplification produces clean supply signals with total harmonic distortion of 0.2% or less.
Wide frequency range
An adjustable 1 Hz to 1,000 Hz range supports mains, onboard supply and low-frequency interference testing.
Short response time
The typical 30 µs response time supports fast voltage changes and dynamic test profiles.
Power abnormality simulation
Interruptions, voltage dips and surges can be reproduced with defined timing and phase values.
Integrated power measurement
The instrument measures RMS, DC and peak values as well as active, apparent and reactive power.
Front and rear outputs
Two accessible output positions simplify changing laboratory setups and fixed integration into test systems.
Operating principle of the linear AC/DC power source
An arbitrary waveform generator creates the digital reference waveform, which is then amplified by the linear output stage. In AC mode, the instrument provides alternating voltage with adjustable frequency and a selectable waveform. DC mode generates positive or negative direct voltage. AC+DC mode superimposes an AC voltage with a positive or negative DC component.
LOW and HIGH ranges adapt the output to different operating points. The LOW range provides higher current, while the HIGH range doubles the voltage range with half the maximum current. Range switching is performed while the output is disabled. In combined AC+DC operation, √2 × VAC + |VDC| must not exceed 212 V in the LOW range or 424 V in the HIGH range.
Models and technical specifications
Both models provide identical voltage and frequency ranges. Compared with the TH7205, the TH7210 doubles the available AC and DC power as well as the output current.
| Technical parameter | TH7205 | TH7210 |
|---|---|---|
| Rated AC power | 500 VA | 1,000 VA |
| Rated DC power | 350 W | 700 W |
| AC output voltage LOW / HIGH | 1.0–150.0 V / 2.0–300.0 V | 1.0–150.0 V / 2.0–300.0 V |
| Maximum AC output current LOW / HIGH | 5.0 A / 2.5 A RMS | 10.0 A / 5.0 A RMS |
| DC output voltage LOW / HIGH | ±1.4–212.0 V / ±2.8–424.0 V | ±1.4–212.0 V / ±2.8–424.0 V |
| Maximum DC output current LOW / HIGH | 3.5 A / 1.75 A | 7.0 A / 3.5 A |
| Typical maximum peak current | AC: 4 × maximum RMS current; DC: 3.6 × maximum current | |
| Frequency range | 1 Hz–1,000 Hz | |
| Dimensions W × H × D | 430 × 177 × 610 mm | |
| Net weight | 27.5 kg | |
| Output or measurement parameter | Range or specification |
|---|---|
| AC voltage resolution | 0.1 V |
| AC programming accuracy | ±(0.3% of setting + 0.6 V) |
| DC voltage resolution | 0.1 V |
| DC programming accuracy LOW | ±(0.05% of setting + 0.05 V) |
| DC programming accuracy HIGH | ±(0.05% of setting + 0.1 V) |
| DC ripple and noise | ≤0.15 V RMS |
| Line regulation | ±0.1% |
| Load regulation LOW / HIGH | ±0.1 V / ±0.2 V |
| Voltage and current measurement accuracy | ±(1% of reading + 2 digits) |
| Power measurement accuracy | ±(1% of reading + 3 digits) |
Dynamic performance and control response
The typical response time is 30 µs. FAST, MED and SLOW amplifier responses adapt the output to different devices under test. FAST supports tests requiring rapid voltage changes. MED is intended for supply and low-frequency tests, while SLOW provides more stable operation with demanding or highly capacitive loads.
The soft-start function increases the output voltage over an adjustable period from 0.0 to 3.0 s when the output is enabled, helping to reduce inrush current from the device under test. The programmed start phase is inactive while soft start is enabled. Internal VCC can track automatically or be fixed for shorter voltage transition times; a fixed setting increases internal power dissipation.
Operating modes and programmable functions
Sequence operation
Up to 600 steps combine AC and DC voltage, frequency, start and stop phase, dwell time, ramps and repetitions.
Supply abnormalities
The AC-only simulation mode generates defined interruptions, dips, rises and recovery profiles using five timing sections.
Waveform library
64 memory positions manage sine, square, triangle, clipping, surge/trap and dimmer signals plus user-defined CSV waveforms.
Phase-controlled switching
Start and stop phases can be programmed from 0° to 359° with 1° resolution.
Timed output
The timer disables the output after a specified period and supports defined duration tests.
Reusable configurations
54 internal files store instrument configurations; additional settings and results can be transferred via USB.
Typical applications
The TH7200 combines precise power delivery with programmable mains and interference signals. It supports manual laboratory testing as well as repeatable routines in quality assurance and production.
Power supplies and power modules
Input ranges, hold-up behaviour and responses to dips or surges are evaluated using defined AC profiles.
EMC-related supply testing
Frequency variation, disturbed waveforms and phase-controlled transitions support immunity testing of electrical equipment.
Motors and transformers
Programmable voltage, frequency and soft start support functional and start-up testing of inductive components.
Production and end-of-line testing
Stored sequences and remote control supply devices reproducibly and transfer measurements to automated test systems.
Lighting and consumer electronics
Dimmer waveforms, voltage fluctuations and adjustable frequencies test lighting as well as audio and video equipment under varying conditions.
Aerospace and defence
Frequencies up to 1,000 Hz and programmable transitions reproduce different AC supply conditions for equipment testing.
Interfaces, software and automation
All four interfaces are included as standard. Communication can be adapted to PC-based laboratory stations, LabVIEW applications and automated test systems.
| Interface or function | Status | Technical use |
|---|---|---|
| RS232 | Standard | Serial remote control using SCPI or Modbus; selectable baud rates up to 115,200 baud |
| LAN | Standard | Network communication via TCP/IPv4 or LXI |
| USB Device | Standard | USBTMC-USB488 or USB CDC virtual COM port |
| USB Host | Standard | Transfer of settings, results and user-defined CSV waveforms plus firmware updates |
| SCPI | Supported | Programmatic instrument control and integration into automated test routines |
| LabVIEW | Supported | Access via USBTMC and use of LXI communication |
Installation and operating conditions
| Requirement | TH7205 | TH7210 |
|---|---|---|
| AC input | Single-phase, 1Ø/2W, 100–120 V AC or 200–240 V AC | |
| Input frequency | 47–63 Hz | |
| Maximum input current at 100–120 V AC | 11.3 A | 22.5 A |
| Maximum input current at 200–240 V AC | 5.5 A | 10.8 A |
| Operating temperature | 0–40 °C | |
| Relative humidity | 20–80%, non-condensing | |
| Storage temperature | −20–70 °C | |
| Maximum operating altitude | 2,000 m | |
| Environmental category | Pollution degree 2, safety category II | |
| Warm-up time for accurate measurements | At least 30 minutes | |
Installation note: The instrument is intended for indoor operation. Keep the ventilation openings clear, establish a reliable protective earth connection and size the output wiring for the maximum possible output current.
Protection and safety functions
The TH7200 monitors output voltage, output current, peak current, power and temperature. The output is disabled when an enabled limit is exceeded. Depending on the configuration, the adjustable current limit can either continue operation in current limiting or disable the output after the selected trip time.
Overvoltage protection
An adjustable voltage threshold protects the device under test against excessive output voltage.
Low-voltage protection
The output is disabled if the voltage falls below the selected threshold.
Overcurrent protection
Current limits and trip times restrict overload conditions during testing.
Peak current protection
Positive and negative peak current limits monitor pulsed loads.
Overpower protection
Power monitoring prevents operation above the permitted output power.
Temperature protection
A temperature-controlled fan and thermal shutdown protect the linear output stage.
Frequently asked questions about the TH7200
What is the difference between TH7205 and TH7210?
With 1,000 VA AC and 700 W DC, the TH7210 provides twice the rated power of the TH7205. Its available output currents are also doubled.
Can the TH7200 combine AC and DC voltage?
Yes. In addition to pure AC and DC operation, an AC+DC mode is available. The permitted combination of AC peak voltage and DC component must be observed.
What is the maximum output voltage?
The HIGH range provides up to 300 V AC or bipolar DC settings up to ±424 V. The LOW range provides higher output current at lower voltage.
Which supply abnormalities can be simulated?
In AC operation, SIM mode reproduces supply interruptions, voltage dips, voltage rises and defined recovery profiles with adjustable timing and phase values.
Can custom waveforms be used?
Yes. User-defined waveforms containing 1,024 data points can be loaded into the internal waveform library as CSV files via USB.
How can the TH7200 be automated?
RS232, LAN and USB Device provide remote control. Supported communication methods include SCPI, Modbus, TCP/IP, LXI, USBTMC and USB CDC.
Is the series suitable for capacitive loads?
The SLOW amplifier response is available for demanding and highly capacitive loads. The appropriate setting should be validated with the specific device under test.
Technical consultation and project enquiry
Selecting between the TH7205 and TH7210 depends on the required AC or DC power as well as output voltage, load current, waveform and automation requirements. ET System supports model selection and integration into laboratory, ATE and end-of-line test systems.
Send a technical enquiry