High Voltage Coupling Unit
Pre-Locating distances to cable faults are not always as simple as connecting a TDR (Time
domain Reflectometer) unit to the cable under test. When the fault resistance is higher than 120
ohms the fault can simply not be detected by any TDR. The AE101 and PCA101 combination
was developed to fill the gap that exists above 120 ohms to well within the M ohm range. It will
easily detect and display information which can be analyzed by anyone with TDR waveform
analyzing skills.

Principles of Operation
The AE101 is connected in series with any standard surge generator and faulty cable which provides
the high voltage energy needed to temporarily break down high resistance cable faults. When
flashover occurs at the fault the AE101 will limit the current flowing and allow the arc to burn for a
slightly longer period.

The AE101 allows the PCA101 to be coupled through suitable filters to the high voltage high energy
pulse. Because burning arc�s are always a low resistance, we can now use TDR techniques.

A single TDR pulse is superimposed on top of the HT pulse at the correct time. When the pulse
arrive at the burning low resistance arc a short circuit is reflected to the TDR. The waveforms are
then simply treated and analyzed as any other TDR waveform when a short circuit is detected.
SUPPLEMENTARY SYSTEMS : AE101
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SPECIFICATIONS
Operating Voltage

Weight

Dimensions


Enclosure


Pulse Withstand
Rate

Coupling
Capacitor

Coupling Resistor
ACCESSORIES
Lid


Test Cables


Earth Lead

Max 32kV DC

20kg

350 x 200 x 300mm
Excluding lid

Aluminium, Electro statically
powder coated

5 PPM


100nF


300R
Aluminium with canvas
bag for test cables

5m HT lead with high
Current clamps

5m yellow/green

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APPLICATION