In the world of electrical engineering and low-voltage equipment manufacturing, ensuring dielectric strength and insulation integrity is paramount. —now commonly updated as part of the unified IEC 61180:2016 standard—serves as the foundational guide for high-voltage testing on equipment rated under 1 kV a.c. or 1.5 kV d.c..
It’s likely a typo for one of these:
Comprehensive Guide to IEC 61180-1: High-Voltage Test Techniques for Low-Voltage Equipment iec+611801+pdf+exclusive