Goodrive350 IP55 High-ingress Protection Series VFD
Optional peripheral accessories
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3. When using an external brake unit, set the brake voltage class of the brake unit properly by
referring to the manual of the dynamic brake unit. If the voltage class is set incorrectly, the
VFD may not run properly.
Do not use brake resistors whose resistance is lower than the specified minimum
resistance. VFDs do not provide protection against overcurrent caused by resistors
with low resistance.
In scenarios where brake is frequently implemented, that is, the brake usage is
greater than 10%, you need to select a brake resistor with higher power as required
by the operation conditions according to the preceding table.
D.8.2 Brake resistor cable selection
Brake resistor cables need to be shielded cables.
D.8.3 Brake resistor installation
All resistors need to be installed in places with good cooling conditions.
The materials near the brake resistor or brake unit must be non-flammable. The
surface temperature of the resistor is high. Air flowing from the resistor is of hundreds
of degrees Celsius. Prevent any materials from coming into contact with the resistor.
Installation of brake resistors
VFDs of 037G/045P or lower need only built-in brake resistors.
PB and (+) are the terminals for connecting brake resistors.
VFD
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Installation of brake units
(+) and (-) are the terminals for connecting brake units.
The connection cables between the (+) and (-) terminals of a VFD and those of a
brake unit must be shorter than 5 m, and the connection cables between the BR1
and BR2 terminals of a brake unit and the terminals of a brake resistor must be
shorter than 10 m.
