Megger TDR1000/3P Handheld TDR For Power Cable Fault Location

Published 04 May 2021


Electrical Test Equipment LV MV HV

Handheld TDR for Fault Finding on Cables

Images Courtesy of: Neil Trotter – HV & LV Cable Jointer at Northern Power Grid

Pictured: Megger TDR1000/3P Cable Fault Location Equipment showing an LV underground mains cable fault. Fault location from substation at 104 metres. The images show an open circuit and then an issue 13 metres from point of electricity supply – this cable fault was caused by incorrect cable laying.

The third and fourth images show the cable outersheath has been dented by dolomite during the backfilling of the cable trench.

Megger TDR1000/3P is a compact, hand held time domain reflectometer (TDR) for locating faults on metallic cables – it has a minimum resolution of 0.1 m and a 5 km maximum range depending on velocity factor selected and cable type. The Megger range of Electrical Cable Testing & Fault Location Products are available to purchase via a network of UK Channel Partners or from established hire fleets at competitive daily/weekly hire rates, such as Sunbelt Rentals.

Megger TDR1000/3P Handheld TDR For Power Application

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Megger TDR1000/3P Handheld TDR For Power Application

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Megger TDR1000/3P Handheld TDR For Power Application Megger TDR1000/3P Handheld TDR For Power Application

Megger TDR1000/3P

handheld TDR for Power Applications

With built-in blocking filters and fused test leads, the Megger TDR1000/3P Time Domain Reflectometer is a compact, hand held time domain reflectometer for locating faults on metallic cables. It has a minimum resolution of 0.1 m/0.3 ft and a 5 km/15 kft  maximum range depending on the velocity factor selected and the cable type.

Four output impedances are available (25, 50, 75, and 100 Ω) and a velocity factor between 0.2 and 0.99 will meet any cable test requirements.

Megger TDR1000 has a simple auto selection option which together with a 4 way control switch offers an intuitive operation for the user.

  • Adjustable display contrast
  • Resolution to 0.1 m
  • For use on Telecom TNV-3 circuit, or 150 V CAT IV power circuits
  • Power blocking filter not required
  • Environmental protection to IP54
  • Auto selected output impedance (between 25, 50, 75 and 100 Ω)
  • 2 ns pulse for near end fault location
  • AUTO option selecting gain and pulse for each range
  • Display distance in metres or feet
  • Uses five AA (LR6) primary cells
TDR1000/3P Handheld TDR

Megger TDR1000/3P Handheld TDR

Technical Specification of Megger TDR1000/3P

Description Time Domain Reflectometer
Part Number 1001-789
Included Accessories Hard case, user guide CD, retractable sheath fused test lead (1 pair)
Optional Accessories Miniature clip test lead set (1 pair), red and black probes and clips for use with all Megger TDR fused test leads, split conductor fused test lead set (1 pair)
Range 10 m, 25 m, 100 m, 250 m, 1000 m, 2500 m, 5000 m (30 ft, 75 ft, 300 ft, 750 ft, 3000 ft, 7500 ft, 15000 ft)
Accuracy ±1% of range ± pixel at 0.67 VF
[Note- The measurement accuracy is for the indicated cursor position only and is conditional on the velocity factor being correct.]
Resolution 1% of range
Input Protection This instrument complies with IEC61010-1 for connection to live systems up to 150 V CAT IV when used with the supplied fused test lead set.
Output Pulse 5 volts peak to peak into open circuit
Gain Set for each range with three user selectable steps (in Manual operating mode)
Velocity Factor Variable from 0.2 to 0.99 in steps of 0.01
TX Null Automatic
Power Down Automatic after 5 minutes with no key press
Backlight Stays on for 1 minute with no key press
Battery Five LR6 (AA) type batteries, Manganese alkali or nickel metal-hydride cells
Battery Life Up to 14 hours (Typical)
Dimensions 230 x 115 x 48 mm ( 9.0 x 4.5 x 2.0 inches)
Weight 0.6 kg (1.32 lbs)
Case ABS
Connectors Two 4 mm-safety terminals
Test Lead (19 mm spaced TDR1000/3P): 1 pair 1.5 m retractable sheath, fitted with 500 mA FF HBC 1 kV 50 kA fuse
Display 256 x 128 pixel Graphics LCD
Operating Temperature Range & Humidity -15 °C to +50 °C (5 °F to 122 °F)
Storage Temperature Range & Humidity -20 °C to 70 °C (-4 °F to 158 °F)
Safety When using the supplied fused test lead set this instrument complies withIEC61010-1 for connection to live systems with less than 300 V between the terminals and up to 150 V CAT IV to earth
EMC Complies with Electromagnetic Compatibility Specifications (Light industrial) BS EN 61326-1, with a minimum performance of ‘B’ for all immunity tests

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