Dry Type Transformer Temperature Rise Selection Guide

Engineering Intent

Temperature rise affects insulation aging, ventilation design and long-term transformer loading. The value should be checked together with ambient temperature and enclosure ventilation.

This article is written for engineers, EPC buyers and procurement teams who need to turn dry type transformer temperature rise into a clear technical request instead of a vague product inquiry.

Key Selection Data

Item	Data to Confirm
Check 1	Ambient temperature and altitude at site
Check 2	Insulation class F or H
Check 3	AN or AF cooling mode
Check 4	Transformer room ventilation path

Standards and Evidence to Request

• IEC 60076-11 dry type transformer requirements
• Temperature rise test record when required by tender
• Factory routine test report

For project approval, request a technical datasheet, outline drawing, wiring or terminal diagram where applicable, routine test report and nameplate information before shipment.

Common Specification Mistakes

• Selecting capacity without checking transformer room ventilation
• Ignoring altitude correction
• Treating fan cooling as a substitute for permanent overload design

RFQ Checklist

1. Rated capacity and voltage ratio
2. Maximum ambient temperature
3. Cooling mode and fan control requirement
4. Temperature controller alarm and trip contacts

Related Product Paths

• Power Transformers
• Dry-Type Transformer Guide
• Transformer Selection Guide Download

Ziyao Power can review the single-line diagram, load schedule, panel drawing or tender sheet and convert the requirement into a practical quotation package.