Baker D30R, Руководство пользователя и инструкции по эксплуатации

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D30R Users Manual
101
Do Not Touch Test Leads while test is in Progress!
71-023 Rev C 5/8/2007
detailed instructions for surge testing and Storage and Print capabilities for
discussions of the storage and recall functions.
1. Surge test phase #1 of the motor. Store and recall the wave pattern by
using the quick store function.
2.
Surge test phase #2 of the motor. During the test carefully turn the
rotor until the wave pattern superimposes that of phase #1 on the
display. Store the results in Lead 2 in memory.
3. Repeat step for phase #3.
If the rotor cannot be turned, carefully observe the wave pattern as the test
voltage is slowly raised. Watch for a sudden shift to the left, instability, or
flickering which could indicate a winding fault. Many winding insulation
failures will not be visible at low voltages but become apparent at a higher
voltage.
Note:
Rotor coupling does not impede the surge impulse from stressing the
turn-to-turn or phase-to-phase insulation. It only causes the rapid damping of
the wave pattern. This rapid damping decreases sensitivity in interpretation of
solid faults. Unstable, flickering wave patterns clearly indicate a fault in
assembled motors whether rotor coupling is present or not.
Fig 8-8: Motor with rotor in place and with faulty windings. One trace shift
significantly to the left
.