EN 60076-3:2013/A1:2018

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Highest voltage for equipment and rated insulation
   level
6 Transformers with re-connectable windings
7 Dielectric tests
8 Dielectric tests on transformers that have been
   in service
9 Insulation of auxiliary wiring (AuxW)
10 Applied voltage test (AV)
11 Induced voltage tests (IVW and IVPD)
12 Line terminal AC withstand test (LTAC)
13 Lightning impulse tests (LI, LIC, LIN, LIMT)
14 Switching impulse test (SI)
15 Action following test failure
16 External clearances in air
Annex A (informative) - Application guide for partial
        discharge measurements on transformers
Annex B (informative) - Overvoltage transferred from
        the high-voltage winding to a low-voltage
        winding
Annex C (informative) - Information on transformer
        insulation and dielectric tests to be supplied
        with an enquiry and with an order
Annex D (informative) - Neutral insulation voltage level
        calculation
Annex E (informative) - Basis for dielectric tests, insulation
        levels and clearances
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Pertains to power transformers and provides details of the applicable dielectric tests and minimum dielectric test levels.