Megger DIGIPHONE Fault Locator Receiver Unit

Module Feature

DIGIPHONE is an acoustic fault detection receiver from Megger cable test product family.

It captures the shock wave and sound signal generated by flashover breakdown at underground cable fault point. It features noise suppression algorithm, visual directional indicator and headphone audio output. It works with surge generator or thumper test set, and supports both acoustic and electromagnetic signal tracing modes. It is widely deployed for medium and high voltage underground cable maintenance in power stations, substations and municipal power networks.

Working principle

When high voltage surge pulse discharges at cable fault location, it creates acoustic shock wave and electromagnetic pulse.

The ground sensor picks up the vibration sound signal, and the built-in circuit amplifies and filters background noise. The unit displays direction and signal strength, guiding technicians to walk toward the exact fault coordinate.

Onboard components

Main display receiver unit, ground contact geophone sensor, noise canceling headphones, signal cable, rechargeable battery pack, carrying hard case.

LED indicators

Front LEDs indicate power status, signal strength, peak capture and low battery warning.

Hardware self‑diagnosis

Built-in supervision detects sensor disconnection, low battery and internal signal circuit anomaly. Fault prompt is shown on the local screen.

Programming software

Not applicable.

Electrical & Process Parameters

Model:DIGIPHONE Brand:Megger Device type:Acoustic cable fault pinpoint receiver Function:Pinpoint underground power cable flashover fault position for electrical maintenance

Mechanical & Structure

Mounting:Handheld portable operation Protection class:IP54 Housing:Rugged reinforced plastic field enclosure

Environmental

Operating temperature:-20℃ ~ +50℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE

Status:Original Megger power test instrument spare

Installation

Turn on the unit and pair the geophone sensor before fault searching.

Adjust gain and filter setting according to site background noise, follow direction indicator to track fault point.

Interface

Sensor input jack, headphone audio jack, charging port.

Diagnostic

No signal reception: Sensor cable broken, probe not firmly coupled to ground or surge pulse not triggered.

Signal interference: Heavy surrounding industrial vibration, high electromagnetic noise or incorrect filter mode.

Low sensitivity: Battery power insufficient or sensor diaphragm damaged.

Product Brief

Megger DIGIPHONE cable fault locator, acoustic pinpoint receiver spare for underground high voltage power cable maintenance service.