Installation and commissioning
DIGIDRIVE
Variable speed drive
78
Réf. 3218 GB - 4.33 / d - 02.02
LEROY-SOMER
6.3 - Voltage, current and power
measurements
6.3.1 - Measuring the voltage at the drive
output
The harmonics generated by the drive
mean that it is not possible to take a correct
measurement of the voltage at the motor
input using a conventional type of
voltmeter. However it is possible to obtain
an approximate value of the rms voltage of
the fundamental wave (that which affects
the torque) using a conventional voltmeter
connected as shown in the diagram below.
6.3.2 - Measuring the motor current
The current drawn by the motor and the
drive input current can be measured
approximately using a conventional moving
coil ammeter.
6.3.3 - Measuring the drive input and
output power
The drive input and output power can be
measured using an electrodynamic
instrument.
6.4 - Spare parts list
Please consult LEROY-SOMER.
6.5 - Exchanging products
CAUTION:
Products must be returned in their
original packaging or, if this is not
possible, in similar packaging, to
prevent their being damaged.
Otherwise, replacement under warranty
could be refused.
MOTOR
3
U
V
W
C : capacitor 0.1µF
400 VAC (1000V peak).
R : resistor 1 k , 5W.
V : AC voltmeter
impedance ≥ 1000 /V.
C
V
R
Ω
Ω
L1
L2
L3
DIGIDRIVE
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