Megger
VLF Sinus 45 kV Cable Tester

Megger VLF Sine Wave 45 kV

Compact, high-performance cable tester for medium-voltage networks

The Megger VLF Sine Wave 45 kV is a powerful, portable cable tester engineered for modern medium-voltage networks. Designed for commissioning, maintenance and advanced diagnostics, this robust VLF Sine Wave system delivers accurate, standards-compliant VLF cable testing while remaining easy to deploy in the field.

With a true 0.1 Hz VLF Sine Wave output and optional integrated Tan Delta diagnostics, the system enables confident decisions on cable condition, ageing and integrity. Whether you are testing new installations or assessing ageing assets, the VLF Sinus 45 provides reliability, safety and clarity at every stage.

Built for demanding VLF cable testing

The VLF Sinus 45 offers a test capacity of up to 10 µF, allowing the testing of long cable lengths – up to 40 km at reduced frequency and voltage. Automatic frequency adjustment ensures optimal results regardless of cable length, making this VLF tester ideal for both urban networks and extended distribution runs.

This advanced cable tester supports VLF, DC and sheath testing, as well as sheath fault pinpointing when used with the optional step voltage probe. The continuous duty cycle allows uninterrupted testing, even during complex diagnostic procedures.

Integrated intelligence for confident results

An optional internal Tan Delta function transforms the VLF Sinus 45 into a complete diagnostic platform. Results are automatically interpreted for PE, XLPE and PILC cables in line with IEEE 400.2, removing guesswork from VLF cable testing and enabling rapid, informed maintenance decisions.

Up to 1,000 measurements can be stored internally and reviewed directly on the unit’s large colour touchscreen. Data can also be exported via USB and analysed using the included reporting software, streamlining documentation and compliance.

Safety-focused VLF Sine Wave performance

Safety is central to the Megger VLF Sine Wave 45 kV. Integrated breakdown detection automatically shuts down the test if excessive charging current is detected, minimising stress on healthy insulation. A one-minute controlled burn function supports fault conversion when required, while earth-loop monitoring and automatic discharge protect both operator and asset.

This VLF tester is fully compliant with key international standards, including:

• IEEE withstand testing for new installations up to 25 kV
• IEEE 400.2 maintenance testing up to 35 kV
• IEC 60229 sheath testing up to 20 kV DC

Why choose the Megger VLF Sinus 45?

• True 0.1 Hz VLF Sine Wave output with exceptional voltage stability
• High-capacity cable tester for long and high-capacitance cables
• Optional Tan Delta diagnostics with automatic evaluation
• Compact, portable design for on-site VLF cable testing
• Intuitive touchscreen interface with internal data storage
• Designed for commissioning, maintenance and condition assessment

For utilities, contractors and service providers seeking a dependable VLF Sinus 45, this system delivers the confidence to test thoroughly, diagnose accurately and act decisively.

❓ Frequently Asked Questions (FAQ)

Q1: What types of cables can the VLF Sinus 45 test?

A. The VLF Sinus 45 is suitable for medium-voltage cables including PE, XLPE and PILC, supporting commissioning and maintenance VLF cable testing.

Q2: Is Tan Delta testing included as standard?

A. Tan Delta measurement is available as an optional internal upgrade. When enabled, the VLF tester automatically interprets results according to recognised standards.

Q3: How portable is the Megger VLF Sine Wave 45 kV?

A. Despite its high output capability, this cable tester is compact and transportable, making it practical for field deployment and on-site diagnostics.

Q4: Does the system support sheath fault location?

A. Yes. The VLF Sine Wave system performs sheath testing and, when combined with the appropriate probe, enables accurate sheath fault pinpointing.