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WL20 Cable Fault Pre-locator (TDR)
WL20 Cable Fault Pre-locator (TDR)
WL20 Cable Fault Pre-locator (TDR)
WL20 Cable Fault Pre-locator (TDR)

WL20 Cable Fault Pre-locator (TDR)

1.Rechargeable battery or mains operation possible
2.Stand-alone operation or operation in conjunction with surge generators (thumpers)
3.Dual operating concept (touch screen and rotary knob)
4.Supports multiple prelocation methods:LV TDR,ICE,ARM
5.Automatic detection of cable end and fault position
6.Rugged, durable, outdoor field-ready case
description1
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Overview

Overview

The WL20 is a portable, stand-alone, time domain reflectometer (TDR) designed for length testing and fault location on power cables encompassing all voltage levels, such as low voltage (LV), medium voltage (MV), and high voltage (HV) applications. Its primary focus is on long HVAC and HVDC installations, whether they utilise paper insulation or solid dielectric insulation.
With its straightforward graphic user interface, featuring a single rotary knob and the well-known piechart navigation, the WL20 ensures operator comfort and enables efficient operation. The device incorporates a large, bright color touchscreen that enhances ease of use and facilitates quick and accurate readings.
Parameters

Parameters

TECHNICAL DATA
Impulse voltage 30V
Test range 20m-100km @ v/2=80m/μs
Wave speed adjustment 150-300m/us
Impulse width 70ns-15us automatic adjustment
Resolution 0.1m
Time domain accuracy < 50 ppm
Sampling frequency 200MHz
Output impedance 50Ω
Working mode LV TDR method; ICE method; ARM method
Waveform transient comparison (secondary impulse method)-optional
Up to 4 waveforms can be compared
Impulse polarity Negative polarity
User interface language English
Data import/export Allowed
Cursor With independent dual cursor control
Screen display 7 ", 800 x 480 LED backlight color display
Screen brightness 800 cd/m² anti-glare capacitor touch screen
Storage ＞10000 test data
Interface Aviation plug, USB2.0
Power consumption 3.5W
Power supply Lithium battery 7.4V, 5200mAh, rechargable
Continuous working time ≥5h
Weight 3.0kg
Size (L x W x H) 270×250×125mm
Features

Features

Work independently

When used independently, only one test wire is needed to achieve testing of the full length (broken wire), joints, and low impedance fault distance of the power cables.

Principle

It’s based on the radar principle and makes use of the fact that any sudden deviations in the characteristic impedance of a cable reflect part of the energy transmitted into the cable. The degree of reflection is dependent on the magnitude of the deviation in the characteristic impedance, the number of reflections, the cable length and the distance to the fault position.

Work with surge generator (Thumpers)

When combined with a surge generator and suitable separation devices, the WL20 supports multiple HV prelocation methods (e.g., ARM, ICE etc.). Its adaptive trigger technology ensures optimal timing of TDR measurements for most accurate results.

Applications

Applications

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