Baker D30R, User'S Manual & Operating Instructions

Page: 77 / 142

D30R Users Manual
77
Do Not Touch Test Leads while test is in Progress!
71-023 Rev C 5/8/2007
setting of 500 will give a wave pattern with 4 divisions of amplitude
that does not go off the screen. For a test voltage of 4000V, a setting of
500 Volts/Div would result in a wave pattern with 8 divisions
amplitude which would go off the screen.
5.
Depress and hold the TEST button (or FOOTSWITCH).
6.
Press Up or Fast Up switch. Apply voltage to the test windings. Monitor
the trace on the display and adjust the Volts/Div and Seconds/Div controls
to get the best waveform. Release Up or Fast Up when voltage is reached.
7. Adjust the OUTPUT and VOLTS/DIV controls to the desired voltage level
while maintaining a fully visible wave pattern on the CRT display. The
voltage is measured from the zero line to the first positive peak (at the far
left) of the trace multiplied by the display VOLTS/DIV setting. The peak
voltage is numerically displayed in the upper right portion of the Surge Test
display.
8. When the test for the lead is complete, the TEST button may be released.
9.
If the surge wave pattern appears steady and stable, the winding insulation
is sufficient to withstand the applied voltage and the test is successful.
Note:
If the wave pattern begins to flicker or rapidly ship to the left
and right and/or up and down as the OUTPUT is increased, there is
weakness in the winding insulation and intermittent arcing between the
windings or phases. The winding or phase contains a fault when the
wave pattern shifts to the left and the amplitude drops. The more
severe the shift and amplitude drop, the more severe the fault. Faults
are often accompanied by an audible arcing sound.
When an obvious fault is present, perform
Step 7
below. End the test
by disconnecting the motor from the tester.
10. Store the test results in the tester’s memory.
a. For testing a single coil or for standards testing, store the pattern
using QUICK STORE.
1. Press the function key corresponding to STORE. A list of
available records and leads appears.