Megger LTW315 Earth Loop Tester Details
The entry-level tester in Megger's earth loop tester range, the LTW315 is used for carrying out 2 wire loop impedance measurements on phase to earth or phase to neutral.
Guaranteed not to trip working RCDs of more than 30mA thanks to a non-trip loop test and compatible with both three and single phase systems, this tester makes performing measurements easier by requiring the use of only 2 test leads in order to carry out measurement procedures. When there is no risk of tripping an RCD it is also possible to use high current loop testing mode.
When carrying out no-trip testing procedures the LTW315 constantly evaluates the level of noise detected on circuitry to ensure that the accuracy of results is not modified by the presence of electrical noise.
The Megger LTW315 is part of the LTW range of earth loop testers. The following table outlines the difference between each of the available models in this series.
Function LTW315 LTW325 LTW335 LTW425 2-Wire Non Tripping Loop Testing √ √ √ √ 2-Wire Fast Test (High Current) √ √ √ √ 110V to 280V Applications √ √ √ √ 50V to 440V Applications - √ √ √ Phase to Phase Testing - √ √ √ 20KA PFC Range √ √ √ √ 40KA PFC Range - - - √ 0.01Ω Resolution √ √ √ √ 0.001Ω Resolution - - - √ AUTO Noise Detection √ √ √ √ AUTO Start Loop Test √ √ √ √ Voltage Measurements √ √ √ √ Frequency Measurements √ √ √ √ Max Zs Display - √ √ √ R2+R2 Display - √ √ √ Backlit Display (White Light) √ √ √ √ Built-In Front Cover (Foldaway) √ √ √ √ IP54 Weatherproof Case √ √ √ √ Accepts Rechargeable Batteries √ √ √ √ Test Result Storage - - √ - Downloadable - - √ -
Megger LTW315 Key Features
- 2-wire loop testing procedures on phase to earth and phase to neutral
- Guaranteed to not trip out RCDs thanks to non-trip loop testing
- Noise detection filters out electrical noise that can create erratic readings
- Resolution down to 0.01Ω
- Portable lightweight instrument with tough carrying case encasing the tester
- AUTO start function starts testing as soon as the leads are connected
- PFC display up to 20kA
- Megger LTW315 Earth Loop Tester
- BS1363 to 3 x 4mm Socket Leadset
- 2 Wire Leadset with Croc Clips
- Shuko Plug Test Lead – EU-SC
- AU/NZ Plug Test Lead – EU-AU
- Hard Carry Case
- User CD
- Technical Specs
Megger LTW315 Technical Specifications
General Accuracy All accuracy statements are based on: Ambient Temperature 23° ±2°C Nominal Voltage Source 230V a.c ±1% Voltage Measurements (ac only) 50V to 440V Accuracy ±2% ±1V Frequency Measurements Range 25Hz to 99.99Hz Accuracy ±0.1Hz A warning will be shown if applied voltage exceeds 440V.
Damage will occur if applied voltage exceeds 600V rms
Loop Testing Accuracy ±5% ±0.03Ω @230V a.c ±10% ±0.03Ω @100V a.c and 280V No Trip Loop and High Current Loop Test Source Voltage 100V to 280V (49Hz to 50.1Hz) Display Range 0.01 to 2000Ω Accuracy ±5% ± 0.03Ω No Trip Loop Test Nominal Current 15ma (at nominal 230V a.c supply) High Current Loop Test 4A (at nominal 230V a.c supply) Operational Range 0.30 to 1000Ω Prospective Fault Current (PFC) Prospective Fault Current =Measured Source Voltage/Loop Resistance Maximum Range No Trip Mode: 20KA Accuracy is derived from loop test and voltage measurement Safety
Designed to IEC61010-1
Designed for 300 volts to Earth Category IV
with phase to phase voltages to 440V.
Fuse protected to 600 volts rms AC
Complies with the following parts of EN61577:
Electrical Safety in Low Voltage Systems up to
1000V ac and 1500V dc - Equipment for testing,
measuring or monitoring of protective measures:
Part 1: General Requirements
Part 3 - Loop Resistance
E.M.C In accordance with IEC61326-1 Power Supply Battery 8 x 1.5V Cells IEC LR6 Type (AA Alkaline) Rechargeable 8 x 1.2V NiCd or NIMH Cells Battery Life 2000 consecutive tests Mechanical Weight 1000g ±10% excluding test leads Dimensions 203 x 148 x 78mm
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