Megger STX40 Portable Cable Fault Location System

The Megger STX40 (STX40P-2000, order 1011497) is for utility and contractor crews who need a true outdoor, trolley-mounted fault location system for LV and MV XLPE/EPR cables, and who still meet high-resistance and PILC faults that need a strong DC hipot and burner. Seven methods sit in one IP43 housing with motorised HV switching, so the operator picks the mode and the unit configures itself.

From Megger’s STX40 datasheet:

• DC hipot and HF burn to 40 kV; surge stages 8/16/32 kV at 2000 J each (extended 4 kV stage on STX40P-2000-4, order 1013011)
• Built-in Teleflex-type TDR with ARM Best Picture Multishot (32 traces per shot), ICE and DECAY; range figures on the page go to 320 km at 0.1 m resolution
• Safety: F-Ohm earth-loop monitor and F-U touch-potential monitor to VDE 0104 expectations
• Build: IP43, pneumatic tyres, sunshine-readable 10.1 in touchscreen or single rotary knob, about 119 kg standard / 124 kg extended, -20 to +55 °C

MME is an authorized Megger representative in the UAE. See our cable fault locators and the Megger range. For LV-focused portable work, use the Megger M-THUMP5. Pair surging with the Megger digiPHONE+2. A standalone surge generator option is the Megger SWG 500.

Megger STX40 Overview

The Megger STX40 is a powerful, portable cable fault location system for analysing, prelocating and pinpointing faults on low- and medium-voltage cables – XLPE, EPR and PILC types. It brings a complete set of test and fault-location methods into one trolley-mounted unit, so a crew can proof-test a cable, prelocate the fault and pinpoint it without swapping instruments.

The system provides DC testing to 40 kV, insulation testing to 20 kV, high-frequency burning to 40 kV, and a surge generator delivering 2000 J at up to 32 kV for thumping. Prelocation uses TDR (radar), arc-reflection multishot, impulse-current (ICE), decay and intermittent-fault methods, with a measurement range to 320 km at 0.1 m resolution. A sunlight-readable 10.1-inch colour touchscreen with single-knob operation makes it approachable despite its capability.

Megger STX40 Key Features

What the Megger STX40 puts on one trolley:

• Seven methods in one trolley — insulation test, Teleflex-type TDR, 40 kV DC hipot, HF burn, ARM/ICE/decay prelocation, multi-stage surging and sheath fault pinpointing on XLPE, EPR and PILC
• DC testing to 40 kV; insulation testing to 20 kV; HF burning to 40 kV (850 mA)
• Surge generator 2000 J at 8/16/32 kV levels
• Methods: TDR, arc-reflection 32-trace multishot, ICE, decay, intermittent-fault
• TDR range 20 m to 320 km; 0.1 m resolution; 115 dB dynamic range
• 10.1 in. sunlight-readable colour touchscreen with single rotary knob
• Outdoor build — IP43, pneumatic tyres, 119 kg standard (STX40P-2000, order 1011497), works from -20 to +55 °C

Megger STX40 Applications

Where crews use the Megger STX40:

• Fault location on LV and MV distribution cables
• Testing, prelocation and pinpointing in one unit
• Street lighting, transmission and industrial cable diagnostics
• Utility and contractor cable crews

What comes with the Megger STX40

What a typical STX40 package includes:

• Megger STX40 portable fault location system (trolley)
• Connection and HV cables
• Mains power lead
• User guide

Megger STX40 FAQ

What buyers ask before choosing the STX40:

• Can it handle paper-lead (PILC) cables? Yes. Megger highlights the 40 kV DC source, 2000 J at 32 kV and Multishot TDR as the combination needed for many PILC faults.
• How is it safer than older portables? Ground-loop (F-Ohm) and touch-potential (F-U) monitoring are built in; HV modes run through motorised switches rather than manual levers.
• STX40 vs M-THUMP5? The M-THUMP5 tops out around 5 kV / 1000 J for LV and lower MV. The STX40 reaches 40 kV DC and 32 kV / 2000 J for heavier MV and PILC work.
• Is the radar separate? No. A Teleflex-type TDR is built into the same housing.

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 wider Middle East. We offer genuine products, competitive pricing, and knowledgeable local support to help you choose the right instrument for your application. For full technical details, download the datasheet below.

Stx40 Datasheet PdfPDF