How to Verify a Dry Type Transformer Before Shipment
Verify a dry type transformer before shipment: routine and type tests, third-party inspection, the documents to collect and the checks before packing.
Procurement
Operation & Maintenance
Dry Type Transformer Maintenance Checklist
A dry type transformer needs little maintenance, but not none. This checklist covers cleaning, moisture, connections, fans and temperature monitoring.
Selection & Sizing
Dry Type Transformer Temperature Rise and Insulation Class
Temperature rise and insulation class set the life of a dry type transformer. Learn the limits, how ambient and altitude change them, and what to specify.
Transformer Basics
Dry Type Transformer Cooling Classes: AN and AF Explained
AN, AF and AN/AF cooling classes decide how much load a dry type transformer carries. Learn what the letters mean and how to choose between them.
Selection & Sizing
Dry Type Transformer Noise Levels: Causes and How to Cut Them
What causes dry type transformer noise, how it is measured to IEC 60076-10, and the practical steps that lower it at the unit and in the electrical room.
Procurement
How to Specify a Dry Type Transformer: The Complete Checklist
A clear dry type transformer specification covers rating, construction, losses, installation, standards and accessories. Use this checklist to avoid delays.
Selection & Sizing
IP Rating for Dry Type Transformers: What to Specify
IP ratings control dust and moisture on an air-cooled dry type transformer. Learn what to specify indoors and outdoors, and the cooling trap to avoid.
Comparisons
Dry Type vs Oil Immersed Transformer: Total Cost Comparison
A dry type transformer often costs more up front and less overall. Compare purchase price, installation, maintenance and losses before you decide.
Transformer Basics
K-Factor Transformer: Sizing for Harmonic Loads
A K-factor rating tells you how much harmonic content a transformer is built for. Learn what it means and how to size for drives, rectifiers and UPS loads.
Transformer Basics
Dry Type Transformer for Indoor Installation: Room, Ventilation and Clearance
Indoor dry type transformer installation: ventilation, clearance, noise, temperature monitoring and when an outdoor oil immersed unit is the better answer.