Megger VLF CR-28 Cosine-Rectangular Cable Test System

Overview

The Megger VLF CR-28 is a portable cable test system that uses a cosine-rectangular very-low-frequency (VLF) waveform to withstand-test medium-voltage cables. VLF testing allows long lengths of cable to be tested with compact, transportable equipment rather than the large resonant sets required for power-frequency testing, making it ideal for commissioning and maintenance of MV cable networks. The CR-28 is rated to 28 kVrms and suits cables up to the 15 kV voltage class.

A key strength of the CR series is that it combines VLF, DC and sheath-fault testing in a single device. It applies a 0.1 Hz cosine-rectangular test voltage in line with international standards, includes an integrated discharge system for safety, and — in combination with a step-voltage probe — enables precise pinpointing of cable sheath faults. This lets one instrument cover routine withstand testing and sheath-fault diagnosis together.

Key Features

• Cosine-rectangular VLF cable test system rated to 28 kVrms.
• Suitable for medium-voltage cables up to the 15 kV class.
• Combines VLF, DC and sheath-fault testing in one device.
• 0.1 Hz cosine-rectangular test voltage per international standards.
• Integrated discharge system for safe operation.
• Precise sheath-fault pinpointing with a step-voltage probe.
• Portable and compact for field cable testing.

Applications

• VLF withstand testing of MV cables during commissioning and maintenance.
• Sheath (jacket) integrity testing and fault pinpointing.
• DC testing where required by cable type or standard.
• Cable network fault-finding and quality assurance.

What’s in the Box

• VLF CR-28 cable test system.
• HV connection leads and grounding.
• Mains lead, transport case and user documentation.

Accessories (e.g. step-voltage probe) vary by order; contact MME to confirm your configuration.

Why buy from MME in UAE

MOHAMMAD MAHDI Electronics Trading LLC (MME) is a trusted supplier of Megger test and measurement equipment across the UAE and the wider Gulf region. We offer genuine Megger products, competitive pricing, expert application support and reliable after-sales service to keep your cable testing programme running smoothly.

Download the Megger VLF CR series datasheet