Seba KMT Teleflex SX - Portable reflectometer for fault location systems

Megger Teleflex SX Portable Time Domain Reflectometer (TDR)

The Megger Teleflex SX is a portable two-channel time domain reflectometer (TDR) used by Irish utilities, HV / MV / LV contractors, and substation maintenance teams to pre-locate faults on power and signal cables. It is the field-deployable TDR you take to site to convert "the cable is faulty somewhere on this run" into "the fault is 1,247 metres from this end", before anyone gets a shovel out.

The savings on a cable repair are mostly in the civil works, not the test. A TDR that locates a fault to a few metres turns a long, speculative trench into a planned, targeted excavation. The Teleflex SX is built to deliver that kind of accuracy on long cable runs, complex networks, and even subsea cable on offshore renewable sites.

What the Teleflex SX measures

• Distance to fault: opens, shorts, bad joints, impedance changes, and other discontinuities along the cable.
• Cable length: confirm actual route length against the as-built drawing.
• Joint and termination signatures: visualise existing joints as reference markers along the trace.
• Two-channel comparison: simultaneously trace two phases of a three-phase circuit to highlight a faulty phase against a healthy reference.
• High-impedance fault assistance: pair the SX with the Megger SPG 40 surge generator and other thumpers to convert a high-impedance fault into a clear TDR event using arc reflection methods.

For utility and renewable cable work, the combination of the Teleflex SX with the wider Megger fault location range is what closes the gap from "cable is down" to "dig here".

How TDR works on a power cable

A TDR sends a low-voltage pulse down the cable and measures the time and shape of the reflections that come back from impedance changes along the route. A short reflects one signature; an open reflects a different one; a joint reflects a small, predictable signature; a fault reflects something unusual. The Teleflex SX presents those reflections as a trace on a touchscreen, with intuitive software interface tools for measuring distance, comparing phases, and storing trace data for later reporting.

For high-impedance faults that do not show clearly on a basic TDR pulse, the SX integrates with surge wave methods, ARM (arc reflection), and ICE (current decoupling) to break through and convert a hidden fault into a measurable event.

Specifications: what to confirm before you order

Target users and applications

• Utilities and DNOs locating faults on MV and LV distribution cable
• HV cable contractors carrying out fault pre-location ahead of pinpointing on transmission and distribution cable
• Industrial maintenance teams investigating faults on plant cable runs
• Renewable site operators locating faults on wind, solar, and BESS collector cable, including subsea export cable
• Telecom and data installers using TDR for opens, shorts, and joint verification on signal cable

Typical applications include initial fault pre-location on a faulted cable, integrity verification on a healthy cable before commissioning, joint and termination mapping along a long route, and high-impedance fault location in combination with surge wave methods. As authorised Megger distributor in Ireland, Powerpoint Engineering supplies the Teleflex SX alongside the wider Megger fault location range and supports it with in-house calibration and repair.

FAQs

Will the Teleflex SX find a high-impedance cable fault?

A standard TDR pulse may not see a high-impedance fault directly. The SX is designed to integrate with surge generators (such as the Megger SPG 40 thumper) and use ARM and ICE methods to convert a high-impedance fault into a measurable trigger event, which is then visible on the trace.

Can the Teleflex SX be used on subsea cable?

Yes. TDR is the standard pre-location method on long cable runs including subsea export cable on offshore wind and interconnector projects. The SX's range and trigger technology make it suitable for that work, subject to confirming reach against the specific cable type.

Does the Teleflex SX need calibration?

Yes. As a precision measurement instrument used for fault pre-location decisions, the Teleflex SX should be recalibrated periodically. Powerpoint Engineering's calibration laboratory recalibrates Megger TDRs in-house and supplies a traceable certificate.

To match the right Teleflex SX configuration to your cable types, route lengths, and fault types, request a quote or speak to our team for compatibility advice.