ALL-TEST
PRO
®
31 User Manual
©2011, ALL-TEST
Pro,
LLC
www.alltestpro.com
rev 2011-11F
11
IV.
Testing a Three Phase Induction Squirrel Cage Motor
Testing can be performed remotely from the motor control center, the motor disconnect or at the motor
itself. This instruction is provided to demonstrate all of the features of the ALL-TEST
PRO®
31, which
can also be used to evaluate other types of electric machines.
Note: The M2000 demo motor is used in this manual for procedural purposes only, it is not designed to
simulate faults or test other features of the ALL-TEST PRO® 31
Materials for Testing with the ALL-TEST PRO® 31Figure 2: Equipment and Materials
To perform a motor test with the ALL-TEST
PRO®
31 requires:
·
ALL-TEST
PRO®
31
·
Test leads and lead clips
·
A pen and paper
(or a copy of the Motor Test Form on page 38)
.
Testing can be performed directly at the motor, at the nearest motor control center or disconnect.
For
purposes of this manual, we will test at the motor using an M2000 training motor, this is for procedure
only (the M2000 is not designed to simulate faults with the AT31).
Operating Procedure 3-Phase Motors
Winding Test
Measures and displays the winding impedance (Z), Phase Angle (
ψ
), Current Frequency response (I/F)
and Impedance phase balance.
1.
Label the three motor leads T1, T2, T3.
Note:
It is very important to take the data in the same order
for long term trending.
2.
Connect the Test leads to the Motor leads T1 & T2.
