Guides & news

Knowledge hub

Practical articles on test methods, pass/fail criteria and interpreting results.

Cable testing · 16 Oct 2026 · 9 min

Cable fault location in three steps: analyse, prelocate, pinpoint

A field workflow for finding power cable faults quickly: classify the fault, choose the right prelocation method, then confirm the exact spot before anyone digs.

Cable testing · 14 Oct 2026 · 8 min

Locating cable sheath faults with a high-voltage Murray bridge

Why outer sheath faults on HV cables are hard to find with pulse methods, how the Murray loop works, and the site details that decide its accuracy.

Protection · 12 Oct 2026 · 9 min

Secondary injection testing of protection relays: a commissioning checklist

What to prepare, what to test and what to record when you commission overcurrent, distance and differential protection with a relay test set.

Protection · 9 Oct 2026 · 7 min

Choosing a relay test set: channels, current and IEC 61850

How many current channels you need, how much output current is enough, and which digital substation features matter when you buy a protection relay test set.