Optimizing High-Voltage Tests with a Repetitive Pulse Generator

In modern high-voltage engineering, component reliability under repeated electrical stress is critical. A repetitive pulse generator (RPG) produces controlled, fast-rising pulses at adjustable repetition rates, enabling realistic aging and insulation tests. Unlike single-shot impulse generators, RPGs allow continuous operation for hours or days, simulating real-world stresses from switching surges, lightning strikes, or power electronics.

Key Technical Parameters

When selecting an RPG for a high-voltage lab, consider peak voltage (typically 5 kV to 100 kV+), pulse rise time (nanoseconds to microseconds), repetition frequency (up to several kHz), and stored energy per pulse. Advanced systems feature solid-state switches (IGBTs or MOSFETs) for precise waveform control and reduced maintenance compared to spark-gap designs.

Applications in High-Voltage Equipment Testing

• Insulation endurance: Evaluate partial discharge (PD) behavior and dielectric breakdown under repetitive impulses.

• Transformer and cable testing: Identify winding insulation weaknesses and terminations stress resistance.

• Switchgear & surge arresters: Verify repetitive energy absorption and thermal performance.

• Research & development: Study partial discharge patterns, space charge accumulation, and material aging.

Benefits Over Conventional Impulse Generators

Traditional impulse generators provide single or very low repetition shots, requiring manual recharging. A repetitive pulse generator automates sequences, drastically reducing test time and improving statistical significance. It also supports accelerated life testing, helping manufacturers meet international standards like IEC 60060 and IEEE 4.

Practical Considerations for Lab Integration

Operators should ensure proper shielding, grounding, and safety interlocks. Pulse generator setups often include a matched load, attenuators, and high-bandwidth voltage/current probes. Routine maintenance focuses on cooling systems, solid-state switch health, and capacitor bank integrity.

Choosing a Repetitive Pulse Generator for Your Facility

Evaluate pulse source impedance, duty cycle, and waveform fidelity. Modular systems allow scaling for different voltage levels. For field applications, compact, battery-capable designs are emerging. Always request waveform measurement data (rise time, overshoot, droop) and software APIs for automated test sequences.

Integrating a repetitive pulse generator into your high-voltage test setup ensures faster, more reliable component validation and deeper insights into long-term performance. As power grids adopt more renewable and HVDC systems, repetitive stress testing becomes indispensable for both existing and emerging technologies.