TNi21
07 April 2016
Page
27/38
8. MOTOR ELECTRICAL CONNECTION
8.1. Power connection
We recommend that the motor frame is earthed.
Diagram showing power connections
.
Figure 7
(1)
Fit capacitors to smooth out inrush current. Recommended value 1000µF per Amp consumed.
(2)
Optional. The ballast circuit eliminates over-voltages produced during braking. See next section.
CAUTION
REVERSED POLARITY
The product is not protected against reversed polarity in the power
cable.
Reversing the polarity could damage the product beyond repair.
8.1.1. Ballast circuit
When the motor brakes, the kinetic energy stored in the inertia in rotation is returned to the power supply and
generates an over-voltage. This over-voltage can be damaging to the motor or other devices connected to
the same power supply.
Where there is frequent braking,
an external ballast circuit should be used
.
In all cases, it is necessary to carry out sizing tests.
Note: upon request, the motor can be supplied with much weaker, non-regenerative braking. In that case, no
ballast circuit is required.
Rated voltage
P
ower
S
u
pp
ly
B
al
las
t c
ir
c
u
it (2)
DCmind
Motor
DCmind
Motor (n)