INVT IPE300 Series, Opeartion Manual

Page: 378 / 383

IPE300 series engineering VFD Optional peripheral accessories
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3. When using an external braking unit, set the brake voltage class of the braking unit properly by
referring to the manual of the dynamic braking unit. If the voltage class is set incorrectly, the VFD
may not run properly.
 Do not use braking resistors whose resistance is lower than the specified
minimum resistance. The VFD does not provide protection against overcurrent
caused by resistors with low resistance.

In scenarios where braking is frequently implemented, that is, the braking usage
is greater than 10%, you need to select a braking resistor with higher power as
required by the operation conditions according to the preceding table.
D.8.2 Braking resistor cable selection
Braking resistor cables should be shielded cables.
D.8.3 Braking resistor installation
All resistors must be installed in places with good cooling conditions.
 The materials near the braking resistor or braking unit must be flame resistant.
since the surface temperature of the resistor is high and air flowing from the
resistor is of hundreds of degrees Celsius. Prevent any materials from coming
into contact with the resistor.
Braking resistor installation
 The 380V 0037 and lower VFD models need only external braking resistors.

PB and (+) are the terminals for connecting braking resistors.
VFD
PB
E
x
te
rn
a
l b
ra
k
e
r
e
s
is
to
r
(+)