Megger LT300 High-Current Loop Tester

Megger LT300 High-Current Loop Tester — Accurate Low-Impedance Loop Testing

The Megger LT300 is a rugged high-current loop tester designed for electricians and test engineers who need precise loop impedance measurement on industrial, commercial and utility installations. By driving a high test current, it resolves very low loop impedances accurately, and its multi-frequency operation suits fixed-installation, aircraft and specialist supplies alike. Built to EN 61557 with a weatherproof CAT IV case, it combines laboratory accuracy with true field ruggedness.

Key Features

• High test current — up to 27 A on the 20 Ω range (and up to 2.7 A on the 200 Ω range) for accurate low-impedance loop results.
• Fine resolution — measures loop resistance from 0 to 19.99 Ω at 0.01 Ω resolution, and up to 199.9 Ω at 0.1 Ω.
• High accuracy — ±5% ±0.03 Ω on the 20 Ω range for confident low-Z measurement.
• Multi-frequency operation — automatic operation at 16 Hz, 50/60 Hz and 400 Hz for standard, rail and aircraft supplies.
• Wide voltage measurement — 0 to 550 V (400 V at 16 Hz) with automatic supply detection.
• CAT IV 300 V safety — rated single-phase CAT IV 300 V (phase to earth) / 550 V phase to phase for demanding environments.
• Weatherproof & rugged — IP54 sealed case rated for −10 °C to +60 °C operation.
• Portable & battery powered — runs on 8 × AA alkaline or NiMH rechargeable cells; 203 × 148 × 78 mm, 980 g.

Applications

The LT300 is ideal for verifying earth-fault loop impedance and prospective fault levels on industrial and commercial installations, substations, and specialist supplies such as rail (16 Hz) and aircraft (400 Hz) systems — anywhere accurate low-impedance loop measurement is required to confirm protective-device operation.

What’s in the Box

• Megger LT300 high-current loop tester
• Test lead set (model dependent)
• Hard carrying case
• 8 × AA batteries (fitted)
• Test 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 LT300 datasheet (PDF).