What to Put in an Enquiry When You Have a Drawing
The parameter checklist for an assembly enquiry, with a copy-ready template.
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Technical Notes
Reading notes on low-voltage power distribution equipment documentation.
Choosing an IP Rating for Low-Voltage Assemblies
Reading the two digits, starting from the installation environment, and keeping temperature rise in view.
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GB/T 7251 and IEC 61439: How the Two Standard Families Line Up
How the Chinese and international standard families correspond, and what design verification covers in project documentation.
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How to Read a Type-Test Report for Low-Voltage Switchgear
A practical reading order for a type-test report: cover reference, test basis, sample information, summary of test items, and conclusion.
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