Home Electrical, EV & Electronic Electrical Test Equipment (18th Edition) Earth Loop Testers

Megger LTW425 Earth Loop Tester

SKU

MEGLTW425

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£610.80 £509.00

5 in Stock

Free UK Delivery*

Description

Megger's LTW425 is the best model available in Megger's LTW range of earth loop testers. It includes all of the features found on the other models and also enhances the overall resolution of the instrument, bumping it up from 0.001 to 0.0001Ω resolution. It's also the only model in the series to feature 40 KA PFC range.

Like other models in the series this earth loop tester is capable of performing 2, 3 and 4 wire earth loop measurements. It also performs 2-wire fast testing (high current) which can be used when an RCD isn't present in the installation.

The LTW425 also automatically compensates for excess noise present within the installation, ensuring that the accuracy of loop tests performed remains high. The instrument is fully suitable for use on 110 to 280V and 50 to 440V applications, can carry out phase to phase testing, automatically starts loop tests when test leads are connected and can also be used to get accurate measurements of both frequency and voltage. It also displays Max Zs and R1 + R2.

There are four separate models available in Megger's LTW300 range of earth loop testers. The following table outlines the difference between each of these instruments:

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 LTW425 Earth Loop Tester Key Features

2-wire non trip loop testing
2 wire fast testing (high current)
Suitable for use on 110V to 280V applications
Also suitable for use on 50V to 440V applications
Phase to phase testing
20 KA PFC range
0.01Ω resolution
Automatic noise detection and correction
Auto loop test initiation
Voltage and frequency measurements
Max Zs display
R1 + R2 display

Full List of Products Included

Megger LTW425 Earth Loop Tester
BS1363 to 3 x 4mm Socket Leadset
2 Wire Leadset with Croc Clips
Schuko Plug Test Lead - EU-SC
AU/NZ Plug Test Lead - EU-AU
Hard Carry Case
User CD

Accessories

Please find below a selection of accessories available for the Megger LTW425 Earth Loop Tester. For further information, or to add an item listed below to an order, please contact our sales team.

Our SKU	Megger's Part Number	Product
1001-977	1001-977B	Fused 10A test lead set (Red/Green) with Prods and clips right angle plugs F10A 50kA (Boxed)
6220-810	1004-323B	SIA10 Socket Interface Adaptor UK to 3 Leads x 4mm (Boxed)
1001-976	1003-132B	Unfused Lead Set Red, Green (Boxed)
1007-167	1007-167	Blow Moulded Case MIT/LT/RCDT 300 Series

Tech Specs

Megger LTW425 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% ±0.02Ω
±15%±0.03Ω	@50V a.c.
No Trip Loop and High Current Loop Test
Source Voltage	50V to 440V (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	IEC 61010 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
EN61557	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