12. If you want to conduct a Step Voltage test, after the Megohm/PI tests complete, ramp the voltage up to the next
level for the first step (adding 3300 volts for this example). Touch the
Step
icon to start the test (
PTT
button or
footswitch is still held down).
13. When the first step test completes, ramp the voltage to the calculated level for each subsequent step then touch
the
Step
icon to start each test. Touch the
DC Hipot
icon after ramping the voltage for the final step.
14. For this example, we run two step tests with 3300-volt increments (6600 and 9900) and a final increment of
4100-volts (14000) for the HiPot test.
Fig 51:
DC Test submenu items;
15. If you want to conduct just a HiPot test, when the Megohm/PI tests complete (PTT still pressed), ramp the voltage
to the full level calculated for the device then touch the
DC Hipot
icon.
16. The
Status Bar
displays a countdown timer when running each Step Voltage test and the DC HiPot test.
17. After completing the entire test suite, release the
Test (PTT)
button (or footswitch).
WARNING: To prevent injury or death from electrical shock, always allow sufficient time for the test
winding to completely discharge before disconnecting the test leads. IEEE 95 recommends a grounding
interval four times the amount of time the high-voltage DC was applied to the windings, or two hours,
whichever is greater. For smaller motors, a shorter time maybe be acceptable.
Refer to IEEE 95 (and/or other standards as applicable) to ensure complete understanding of proper
discharge needs and recommendations, and to ensure the safety of personnel.
On the Baker PPX30/30A, set the Test Select switch to the LEADS GROUND position before disconnecting
test leads. On the Baker PPX40, wait to disconnect test leads until you see the leads energized lights go
out followed by the sound of a relay switching.
18. Save the test results in the
Active Folder / Active Record
.
NOTICE: Running another test without saving results from the previous test will overwrite the last test in memory.
Shutting down the power pack prior to saving will also cause the loss of all unsaved data.
Using Power Packs with Baker DX Testers
www.megger.com 55
Содержание PPX30
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Страница 24: ...Baker Power Pack Setup 16 Baker Power Packs User Guide 71 061RC EN V2 www megger com...
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