Partial Discharge Detection System for Power Cables

Measures partial discharge magnitude in cable lengths and accessories during voltage test. Used by medium and high voltage cable makers to detect insulation defects. Findings help reject cable lengths before voids or defects cause service failures.

Specification

A coupling capacitor and measuring impedance pick up discharge pulses during voltage application. Calibrated pulse display shows PD magnitude in pC against phase angle and detects voids and contamination.

Features

• Sensitivity to below 1 pC
• Phase-resolved PD pattern display
• Built-in calibrator 1 to 100 pC
• Digital noise filtering
• Inception and extinction voltage recording

Technical Specifications

Detection range	0.1 to 10000 pC
Sensitivity	<1 pC
Frequency band	40 kHz to 400 kHz
Calibrator	1, 5, 10, 50, 100 pC
Sampling	100 MS/s
Voltage input	up to 150 kV via coupling capacitor
Power	230 V AC, 50 Hz
Standards	IEC 60270, IEC 60885-3

Standard Accessories

• Measuring impedance
• Calibrator
• Coupling capacitor lead