Megger LTC135 Load Tap Changer Test Power Supply

Megger LTC135 Load Tap Changer Test Power Supply — OLTC Dynamic Resistance Testing

The Megger LTC135 is a DC constant-current power supply that turns a Megger circuit breaker analyser into a complete on-load tap changer (OLTC) test system. Delivering stable, selectable test currents, it supports dynamic resistance measurement, switch-sequence timing and transition-resistor analysis on transformer tap changers — helping utilities and test engineers detect worn contacts and timing faults before they cause failures.

Key Features

• Selectable test current — three ranges of 0.1 A, 1 A and 5 A to suit different tap-changer measurements.
• Stable constant-current output — 48 V open-circuit voltage with a precise 1 V shunt output per range at ±0.1% accuracy.
• Dynamic resistance measurement — captures make-before-break transitions to reveal contact wear and transition-resistor condition.
• Switch-sequence timing — measures diverter and selector operation timing during tap changes.
• Motor-current monitoring — records tap-changer motor current via an external clamp for mechanical assessment.
• Circuit-breaker-analyser accessory — integrates with Megger breaker analysers to add full LTC test capability.
• Universal mains input — operates from 100–250 V AC, 50/60 Hz, 300 W maximum.
• Field-ready build — rated −20 °C to +65 °C, supplied with carrying bag and 20 m test leads.

Applications

The LTC135 is used by transformer test teams and utilities for on-load tap changer condition assessment — dynamic resistance testing, contact-timing verification and transition-resistor checks during routine maintenance, commissioning and fault investigation of power transformers.

What’s in the Box

• Megger LTC135 load tap changer test power supply
• Three sets of test leads (20 m each)
• Carrying bag
• User documentation

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 LTC135 datasheet (PDF).