Braking Resistor Cable Selection; Braking Resistor Installation - INVT Goodrive350 Series Operation Manual

Goodrive350 series high-performance multifunction VFD
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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 unit must be non-flammable. The resistor
surface temperature high. Air flowing from the resistor is of hundreds of degrees
Celsius. Prevent any materials from contacting the resistor.
Installation of braking resistors
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Installation of braking units
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All 660V VFD models need external braking units.
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(+) and (-) are the terminals for connecting braking units.
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The connection cables between the (+) and (-) terminals of a VFD and those of
a braking unit must be shorter than 5 m, and the connection cables between
the BR1 and BR2 terminals of a braking unit and the terminals of a braking
resistor must be shorter than 10 m.
The following figure shows the connection of one VFD to a dynamic braking unit.
In scenarios where braking is frequently implemented, that is, the braking
usage exceeds 10%, you need to select a braking resistor with higher power
as required by the operation conditions according to the preceding table.
The 380V 37kW and lower VFD models need only external braking resistors.
PB and (+) are the terminals for connecting braking resistors.
VFD
(+)
(-)
DC+
DC-
+ + + + + +
(+)
VFD
PB
DBU
braking unit
BR1 BR2 (+)
+ + + + +
External braking resistor
-354-
Optional peripheral accessories
(-) PE
+ + +