Indication Of Direction Of The Rotating Field, Or Direction Of Rotation Without Connecting Test Leads - AEMC 6609 User Manual

4.2 Indication of Direction of the Rotating Field,
or Direction of Rotation without Connecting
Test Leads
1. Do not connect any test leads to the instrument.
2. Position the instrument on the motor, within 2.5 cm, parallel to
the shaft in the direction indicated by the symbol on the front
panel.
3. Press the ON (TEST) button. The Green LED indicator indi-
cates that the instrument is in operation.
4. The clockwise or counter-clockwise rotation indicator lights to
indicate the direction of the rotating field.
Note: The instrument does not work on motors controlled by
frequency converters.
The table below summarizes the conditions necessary to obtaining
a reliable test result.
Number of rotations of the
rotating field (per minute) as a
Number of
function of frequency (Hz)
pairs of poles
16 2/3
1 1000
2 500
3 333
4 250
5 200
6 167
8 125
10 100
12 83
16 62
10
50 60
3000 3600
1500 1800
1000 1200
750 900
600 720
500 600
375 450
300 360
250 300
188 225
Phase & Motor Rotation Tester Model 6609
R
Angle
Minimum Ø of the
between
poles
0
60
30
20
15
12
10
7.5
6
5
3.75
motor casing
cm
5.3
10.7
16.0
21.4
26.7
32.1
42.8
53.5
64.2
85.6