Megger LTW425 Loop Impedance Tester

Megger LTW425 Loop Impedance Tester (2 Wire Non tripping + MaxZ + (R1 + R2) + 0.001 ohms)

As well as saving time and eliminating the risk of incorrect connections, dependable two wire testing is a major benefit in applications where the neutral is missing or inaccessible, such as light switches, systems with 110V centre-tapped supplies, and many types of luminaire.

The new Megger LTW425 Loop Impedance Tester is three phase safe and category IV 300V rated, making it suitable for use on supplies from 50V to 300V AC single phase, as well as on 440V three phase installations.

Megger Loop Impedance Testers use the latest digital processing techniques to separate the test signal from the fundamental frequency of the supply. This means the Megger LTW425 Loop Impedance Tester automatically averages a large number of results over the duration of the test. This enables non trip testing to be performed without DC injection, a technique which is, in any case, proving ineffective with electronic RCDs.

The entry-level Megger LTW315 Loop Impedance Tester provides all of the facilities needed for two wire non-trip loop testing on supplies between 110V and 280V, while the Megger LTW335 Loop Impedance Tester includes facilities for storing and downloading test results. The Megger LTW425 Loop Impedance Tester allows for high prospective fault calculation. All Megger Loop Testers provide PFC calculation as standard.

Megger LTW425 Loop Impedance Tester special features:

• 2 Wire loop impedance measurement
• 2 Wire non tripping loop tester
• 50v to 440v operation
• 110v centre-tap loop testing
• CATIV installation testing
• AUTO start – operation
• 0.001 resolution

Megger LTW425 Loop Impedance Tester loop testing:

• 2 wire non-tripping loop testing
• 2 wire high current, fast, loop testing
• 110v to 280v applications
• 50v to 440v applications
• Phase to phase testing
• PFC range 20kA
• PFC range 40kA
• Resolution 0.01 ohm
• Resolution 0.001 ohm
• Automatic noise detection
• Automatic start test
• Frequency measurement
• Max Zs display
• Max R1 + R2 display

Megger LTW425 Loop Impedance Tester features:

• Backlit display
• Fold away cover built-in to the Megger LTW425
• Loop impedance test quick start guide in cover
• Accepts rechargeable batteries

Megger LTW425 Loop Impedance Tester Loop standards:

• IEC61010-1 CATIV 300V
• EN61557
• Weather and dust proof to IP54

Megger LTW425 Loop Impedance Tester Kit includes:

• Megger LTW 425 Loop Impedance Tester
• Megger LTW 425 Loop Tester storage and carry case
• 2-wire lead set with crocodile clips
• Mains socket lead set
• Free calibration certificate
• 3 year warranty

Technical Data Section

Download technical PDFs for further information on this product.

Megger LTW425 Datasheet