Megger LTW325 Non-Tripping Loop Impedance Tester

Megger LTW325 Non-Tripping Loop Impedance Tester — With maxZ & (R1+R2)

The Megger LTW325 is a two-wire non-tripping loop impedance tester that adds maxZ display and (R1+R2) calculation to the LTW range, helping electricians confirm compliance quickly. Its low-current no-trip test measures loop impedance without tripping RCD-protected circuits, while a high-current mode delivers precise low-impedance readings across a wide 50–440 V range — all in a rugged, weatherproof CAT IV handheld to EN 61557.

Key Features

• Non-tripping loop testing — a nominal 15 mA test current measures loop impedance on RCD-protected circuits without tripping.
• High-current test — a nominal 4 A test delivers accurate low-impedance loop results where tripping is not a concern.
• maxZ display — shows the maximum permitted loop impedance to speed up pass/fail decisions.
• (R1+R2) calculation — supports circuit conductor-resistance verification on the instrument.
• Wide measurement range — displays loop impedance from 0.01 Ω to 2000 Ω at 0.01 Ω resolution, ±5% ±0.03 Ω at 230 V.
• Prospective fault current — calculates PFC up to 20 kA for protective-device verification.
• Wide voltage range — measures supply voltage over 50–440 V (±2% ±1 V).
• CAT IV 300 V & IP54 — rugged, weatherproof build; 8 × AA cells; 203 × 148 × 78 mm, ~1000 g; −10 °C to +50 °C.

Applications

The LTW325 is ideal for periodic inspection and testing, new installation commissioning and fault-finding — verifying earth-fault loop impedance, (R1+R2) and prospective fault current on domestic, commercial and industrial circuits, including RCD-protected supplies where non-tripping measurement is essential.

What’s in the Box

• Megger LTW325 non-tripping loop impedance tester
• Test lead set
• 8 × AA batteries (fitted)
• Calibration certificate and user guide

Why Buy from MME in UAE

MOHAMMAD MAHDI Electronics Trading LLC (MME) is your trusted supplier of genuine Megger test and measurement equipment in the UAE. We offer competitive pricing, fast local delivery across Dubai, Abu Dhabi and the wider UAE, and knowledgeable after-sales support. Contact us on WhatsApp for the latest price and availability.

Download the Megger LTW325 datasheet (PDF).