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HVDC Test System for Factory, Laboratory and Field Testing
DEMIKS supplies HVDC test systems from 60 to 400 kV, with custom designs up to 800 kV.
Select a DC high voltage test set for your test object, required current and test duration, with equipment selection and technical support from our team.
- DC withstand and leakage current testing
- Catalog ripple factor ≤0.5%
- Overseas installation, commissioning and operator training available
60–400 kV
Catalog rated DC output
2–5 mA
Current options by model
≤0.5%
Catalog ripple factor
30 minutes
Rated-load intermittent operation
120–2000 W
Rated power across the listed models
Up to 800 kV
Custom design scope
DC Test Capabilities
Products from our high voltage DC test system range provide the required DC voltage for specified withstand and leakage measurements on electrical insulation. We help you choose the generator, controls and accessories to match your test requirements, and assess the complete test system configuration.
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DC withstand testing
Apply the prescribed electrical stress to a test object and evaluate the result against acceptance criteria. Product standards define the voltage and the test duration; the generator defines the available test system envelope.
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Leakage current measurement
Stipulate measuring leakage current during a voltage test. How readings are evaluated is defined by the test procedure and criteria.
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Arrester test functions
The ZGF range includes a 0.75 UDC1mA function for zinc-oxide arrester testing. Include the arrester type and required measurement sequence in your enquiry so the selected controls match the test.
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Protection and operating controls
Zero-position, overvoltage and overcurrent protection functions and breakdown protection are described. These functions are part of test equipment. Other factors such as the test area, the procedure and the personnel arrangement need to be suitable to the installation.
Test Objects and Applications
Equipment for factory, laboratory and field testing of power system components is described. For cable testing of HVDC components, assess the construction of the cable, accessory arrangement and test stage and the DC source to evaluate if it meets the total test requirement.
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Cables and accessories
Stipulate cable length, capacitance and accessory assembly and the required DC test voltage. Cable testing during manufacture, qualification and site work can vary.
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Bushings and arresters
Send the component rating, drawing and applicable test procedure. Connection geometry and leakage measurement arrangements help determine the test set and accessories.
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Other electrical equipment
We can evaluate enquiries for transformers, circuit breakers, generators and converter-equipment insulation components. State the specific apparatus and test method rather than selecting from a general equipment category alone.
Utility and laboratory purchasing
Match the test waveform to the application. A utility substation test, a laboratory dielectric study and a factory acceptance test can require different high voltage test equipment even when their headline voltage is similar.
System Configuration
A useful quotation defines the source, measurement arrangement, controls and site interfaces together. Check lead length and transport requirements early to see if the configuration will fit the test bay or field work location.
Custom designs up to 800 kV
Our custom HVDC system scope extends to 800 kV. Current, ripple, duty, polarity, control functions and layout are specified for the individual project, separately from the catalog table below.
| Requirement | Why it matters | Include with your enquiry |
|---|---|---|
| Capacitive load and charging | Voltage rating alone does not establish the required charging performance. | Object capacitance, leakage, target voltage and permitted charging time |
| Duty and test sequence | A long hold or repeated sequence can require a different design from an intermittent catalog unit. | Hold time, repetition, recovery intervals and load during each stage |
| Polarity and waveform | Fixed polarity and polarity reversal during a test are different requirements. | Required polarity, reversal sequence and any transient or superimposed test |
| Measurement and acceptance | Ripple factor is not measurement uncertainty. | Divider, instrument, calibration and complete-system uncertainty requirements |
| Installation and accessories | The test object, leads and discharge arrangements determine the physical setup. | Layout, cable lengths, grounding arrangements, access and transport constraints |