Megger STX40-2000 Portable Fault Location System 
 
The STX40 is the most powerful and most modern port-able fault location system in the market. It is ideally suited for proof testing, analysing, prelocating and pinpointing of faults on extruded low voltage and medium voltage XLPE- and EPR-insulated cables. With its 40 kV DC source and a potent high frequency burner it is also highly capable and effective on PILC cables as well.
The STX40 is fully automated with motorised HV switches controlled by either the rotary knob or the industry-grade colour touchscreen.
True portable outdoor-ready unit, IP 43
Very easy to use “turn&click” single rotary knob interface
Surge/Thump energy 2,000 Joule
DC testing up to 40 kV, surging/thumping up to 32 kV, burning up to 40 kV
Prelocation methods: Inductive ARM with Multishot, ICE and DECAY
Built-in safety circuits for earth connection monitoring (F-Ohm) and touch potential monitoring (F-Voltage)
Full TDR control of all HV functions
 
The key features at a glance:-
Lightweight, rainproof outdoor field-ready design thanks to IP 43 and 118 kg (260 lbs)
Bright, sunlight proof 10.1” color touchscreen
To identify different types of faults: Insulation resistance evaluation up to 20 kV and 650 MΩ
DC testing up to 40 kV, with automatic voltage breakdown voltage detection and ramp function
Integrated radar/TDR and integrated prelocation with radar-based and transient prelocation methods
Surging/Thumping at 8/16/32 kV with 2000 J, Optionally with additional 4 kV stage 1100 J
Very effective high frequency burner for fault conversion with up to 40 kV and up to 850 mA
Prelocating methods
The STX40 provides the following different HV prelocating methods:
True inductive ARM Multishot: The Arc Reflection Method overlays and compares a low voltage reference trace and a high voltage fault trace captured via capacitor discharge through an inductive (coil-type) filter. 15 comparative measurements per ARM shot are dis-played (Multishot feature), and the results are evaluated automatically.
ICE/Surge Pulse: After fault ignition via capacitor discharge, the Impulse Current or Surge Pulse method measures the current component of the travelling wave, This technique is suitable for long cables and PILC cables.
DECAY: After fault ignition via HV DC source, the DECAY method measures the voltage component of the travelling wave. This technique is suitable for very long cables, HV transmission cables and faults with very high breakdown voltage.
IFL: Intermittent Fault Locating; to find intermittent faults with temporarily changing characteristics like they often occur in street lighting systems.