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DC Testing/DR Unit
12/7/2009 | 71-026 V2
PP24
17
turn the output control knob so fast that the PP24 HiPot trips while charging the
motor’s ground wall capacitance.
5)
Once the test voltage is reached, stop turning up the output control knob, set the
time to zero by pressing the T=0 button on the DR, and follow the instructions on
the DR’s display on changing the current range to the most sensitive range. The
test button must still be depressed for the entire test. Releasing the test button will
cause testing to stop.
6)
As key times are reached during the test, values will appear on the screen. Once 60
seconds has passed per IEEE 43, press the Save Meg button on the DR to save the
Megohm reading. Note: the DR automatically acquires a HiPot reading at 1min/60s
- this value can also be used for the Megohm reading.
Fig 2-6: Megohm & 1 min DC test reading – test active
7)
If a DA test is needed, continue to keep the Test button pressed. At 3min/180s, the
DR will automatically acquire the voltage and current readings and then will
calculate a 3min/30s DA Test as shown below.
Fig 2-7: DA ratio visible