High-Voltage Power Supplies for Subsea Cable Testing and Power Feed Equipment
USE CASE
Subsea electrical systems require high-voltage power supplies that are robust, precise and easy to integrate into mission-critical installations. Technix HV supports subsea applications including cable isolation testing, leakage current measurement and Power Feed Equipment (PFE) for long-distance repeater systems.
Application context
Subsea cables and repeater systems operate in harsh environments where failure can be extremely costly. High-voltage systems are used both during qualification and operation: cable insulation may be tested by injecting high voltage, while modern subsea communication networks use high-voltage lines to power repeaters installed over long distances.
CUSTOMER CHALLENGE
• Inject high voltage, typically 30 to 50 kV, to verify cable isolation.
• Measure leakage current accurately during cable testing.
• Avoid floating the equipment under test where a zero-floating architecture is preferable.
• Power subsea repeaters through HV lines, typically around 5 to 10 kV with currents of a few amps.
• Ensure robustness, long-term reliability and easy integration in offshore-related systems.
• Adapt control interfaces to the customer’s supervision and safety architecture.
TECHNIX HV SOLUTION
Technix supplies high-voltage DC power solutions for both subsea cable testing and PFE applications. For leakage current measurement, the zero-floating option can allow direct and precise output current measurement without floating the equipment under test. For PFE systems, Technix solutions offer robustness, flexible control interfaces and integration support.
Key benefits
• Precise leakage current measurement for cable isolation testing.
• Robust power architecture for mission-critical subsea environments.
• Flexible control interfaces for integration into customer systems.
• Technical support to define the most suitable high-voltage configuration.
• Adaptability to both testing and operational PFE applications.
Cable testing use case
During cable qualification or maintenance, high voltage is applied to verify insulation performance and detect leakage current. Accuracy, safety and repeatability are central to the measurement process.
Power Feed Equipment use case
PFE systems supply power over long subsea links. The high-voltage power supply must be reliable, controllable and compatible with the electrical architecture of repeater chains.
What voltage is used for subsea cable testing?
The referenced applications typically inject 30 to 50 kV to verify cable isolation and measure leakage current.
What is the zero-floating option?
It is an option that can allow precise output current measurement without floating the equipment under test, depending on the setup.
Can Technix support PFE applications?
Yes. Technix high-voltage solutions can be adapted to Power Feed Equipment applications requiring robust, integrated DC power sources.
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