• Designattion -A indicates 120V/60Hz input
• Self-Contained Unit Features Proof Tester, Burner and Thumper in One
• Burn Currents to 50 mA
• Internal discharge solenoid
• Impulse Energies of up to 900 J
• Automatic and Manual Thumper Mod
• External interlock provisions
• Operable from Line Voltage or Generator
• Single HV Output Cable
• Mode Indicator Lights

The CF30‑8‑A is a compact, rugged, and reliable self‑contained unit designed for easy use in the field. It features a continuously adjustable impulse rate ranging from three to thirty seconds. The “A” in the model number indicates that it is configured for an input voltage and frequency of 120 V at 60 Hz. Its test capabilities include a 30 kV DC proof‑test voltage, a 50 mA burn current, and a 0–15 kV DC capacitive‑discharge (thumper) output.

When paired with a high‑voltage coupler and a time‑domain reflectometer, the unit can quickly pinpoint the fault location, providing distance measurements in either feet or meters. This setup significantly reduces the number of high‑voltage thumps required, helping to minimize cable damage or degradation during testing.