Duratool D03121 Manuale rapido - Pagina 3
Sfoglia online o scarica il pdf Manuale rapido per Strumenti di misura Duratool D03121. Duratool D03121 4. Motor & phase rotation indicator
terminal in three-phase motor).
•
Press the "TEST" button and the power light will turn green, indicating that the
indicator is ready for testing.
•
"Clockwise rotation (R)" or counter-clockwise rotation
(L)" with the indicator light on, indicates L1-L2-L3 of
the three-phase system connected to the indicator in
"positive phase" or "negative phase".
CAUTION: The rotation indicator light will still be on if the
non-energized conductor is connected and the L1, L2 or
L3 test lead is not connected. Refer to the information
(right).
Non-contact type magnetic field rotation direction test (motor rotation direction
test)
•
Remove the test line from the indicator.
•
Place the indicator above the motor and make it parallel to the motor driving shaft
body.
•
Make the bottom of the indicator face towards the motor driving shaft.
•
The distance from the indicator to the motor shall be no more than 2.5cm.
•
Press the "TEST" button and the power light will turn green, indicating that the
indicator is ready for testing.
•
If the "Clockwise rotation (R)" or the "Counter-clockwise rotation (L)" indicator light
is on, it indicates that the motor is in "clockwise rotation" or "counter-clockwise
rotation".
CAUTION: Non-contact type magnetic field rotation direction test is applicable to
single-phase and three-phase motors. If the motor is controlled by a transducer, the
indicator can not normally test the rotation direction of the motor.
When a non-contact type test is made, get the coil of the motor as close to the sensor
on the indicator as possible, in order to get accurate results.
To obtain reliable test results for motor rotation, refer to the table below:
Magnetic field rotations at
No. of
frequency (Hz) below (1 rev/min)
pole pair
16 2/3
1
1000
2
500
3
333
4
250
5
200
6
167
8
125
10
100
12
83
16
62
50
60
3000
3600
1500
1800
1000
1200
750
900
600
720
500
600
375
450
300
360
250
300
188
225
Angle
between poles
°
60
30
20
15
12
10
7.5
6
5
3.75
Minimal size of
motor case Ø
Centimetre (cm)
5.3
10.7
16.0
21.4
26.7
32.1
42.8
53.5
64.2
85.6