Specification & Procurement
Can a GB/T 3906 Type-Test Report Support an IEC 62271-200 Project?
Learn when a GB/T 3906 switchgear test report can support IEC 62271-200 review, what gaps to map, and what buyers should verify.
Engineering blog
Useful technical content, written around project decisions
Selection guides, evidence notes and enquiry checklists connect product data with the information engineers and procurement teams need to confirm.
Featured · Specification & Procurement
Why Two 12 kV, 31.5 kA Switchgear Quotations Are Still Not Comparable
The same headline voltage and fault-current ratings can conceal major differences in switchgear duty, construction, protection, interfaces, testing and commercial scope. This guide provides a practical method for normalizing quotations before technical and price evaluation.
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Practical guidance for project decisions
These articles address equipment selection, standards, technical evidence and the information required for project enquiries.
Specification & Procurement
IAC AFL or AFLR? Select MV Switchgear from the Actual Room Layout and Arc-Exhaust Arrangement
Choose IAC AFL or AFLR from personnel access, rear aisles, fault duty, clearing time, pressure relief and the final switchgear-room layout.
Equipment Selection
Will a Compact Substation Deliver Full Transformer kVA at 45°C?
Learn how ambient heat, solar load, enclosure class, ventilation and transformer losses determine compact-substation capacity at 45°C.
Specification & Procurement
Changing Breaker Brands in an IEC 61439 LV Switchboard: What Must Be Re-Verified?
A buyer’s guide to temperature-rise, short-circuit, protection and mechanical checks when changing breaker brands in an IEC 61439 switchboard.