Transformer accessory buying guides — written for buyers, not for search engines.
Practical, no-nonsense articles to help procurement and field engineers select the right accessories, read a nameplate, and avoid the most common ordering mistakes. More guides are added every week.
All Guides
Each guide is self-contained. If something is marked TBD*, it means we are confirming the exact figure with our manufacturing partner before publishing — we never guess numbers that affect your order.
How to Read a Transformer Nameplate
Turn the sticker on the tank into a precise accessory list — rated power, voltage ratio, cooling class and what each one tells you to order.
Read guide →Buchholz Relay Selection Guide
QJ-type gas relays explained: which model for which transformer size, mounting flange, gas-volume setting, and ONAN vs. forced cooling.
Read guide →Build a Transformer Spare-Parts Kit
What to stock so a small fault never becomes a long outage — gaskets, silica gel, capsules, standby relays and valves, all in one shipment.
Read guide →Transformer Preventive Maintenance Checklist
A practical inspection routine for oil-immersed units: what to check daily, monthly and at outage — plus the spares that turn a long outage into a same-day fix.
Read guide →How to Choose a Transformer Accessories Supplier
A buyer's checklist for overseas sourcing: match parts to the nameplate, verify certification, consolidate shipping, and the questions to ask before you commit.
Read guide →Accessory Standards: JB/T, GB and IEC
How to read a standard reference in a tender — edition year, clause list, test report scope — and five checks before you accept a substitution.
Read guide →Transformer Oil Conservation Systems
How transformers keep moisture out: silica-gel breathers, conservator capsules and sealed tanks — and how to specify the right one for your market.
Read guide →Need a guide for a specific accessory?
Tell us the model or send a nameplate photo — we will answer and may turn it into a published guide.