VOLTECH AT3600 USER MANUAL TRANSFORMER TESTS
TESTS AND TEST CONDITIONS VPN 98 - 024 PAGE 7.1.71.
1.44. DCAT - DC HI-POT RAMP
WHERE USED
Hi-Pot Ramp testing (to check for insulation breakdown between windings or
between windings and the screen or core) is often specified for power line
transformers or for switched mode power transformers in applications where safety is
important.
It is typically performed between all primary windings connected together, and all
secondary windings plus the screen connected together.
SPECIFYING THE MEASUREMENT
During the test, a dc target voltage is applied across two groups of windings with the
windings in each group being shorted together. The voltage and current are
monitored throughout the ramp time.
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