37
Overview of
Preferences
and Settings
AC Testing
AC testing is an available option on the 1100H+. AC Testing may be required to meet a test
specification, in which you cannot substitute an equivalent VDC. For more information, see
on page 56.
When using AC, the hipot test
progresses somewhat differently as the graphs below illustrate.
Using VAC for hipot testing causes current peaks due to cable capacitance. These peaks are
proportional to how fast the voltage is changing. For more information on the differences
between DC and AC hipot testing, see
www.cirris.com/testing/guidelines/ac_hipot_testing.html
Voltage
0
Time
DWV Voltage Setting
(in AC RMS)
IR Insulation Voltage Setting
(always in DC)
0
Time
Current
Optional High Voltage “Soak”
Dielectric Withstand Test
Insulation Resistance Test