Emerson PACMotion IC830DP 01207, Accessories Manual

Page: 23 / 36

PACMotion™ Servos Accessories Guide Section 7
GFK-3173C December 2020
Regeneration Resistors 17
Section 7: Regeneration Resistors
During braking with the aid of the motor, energy is fed back into the drive. This energy is dissipated as heat
in the regeneration resistor The regen resistor is switched on by the brake circuit. Different resistance
values must be used depending on the drive. All regen resistors meet the requirements of CE directives
and are UL-registered.
7.1 Safety Instructions
CAUTION
You must read the instruction manuals for the drive and motor that you are using in your application and
observe the safety instructions they contain before starting mounting/installation work.
This manual is only valid in conjunction with the instruction manuals for the drive and motor you are
using in your application.
The danger of burn. Mount only in switchgear cabinets, observe installation clearances, provide the
requisite conditions for unobstructed convection for cooling. As Regen resistors can heat up to
temperatures in excess of 250 °C, use temperature-resistant components in the vicinity of the resistor.
Observe allowed mounting positions (see dimension drawings). The connection terminals must never
be in the exhaust area of hot air.
In case of insufficient cooling or false mounting the resistor or the surrounding devices could be over-
heated or damaged.
A connection diagram appears in the drive's instructions manual.
Note: For best results, the following conditions must be provided for regen resistors:
• Unobstructed cooling air
•
The unobstructed exhaust of warmed air
•
Rated data with maximum ambient temperature 40°C, in case of ambient temperature higher
than 40°C, power must be reduced by 4% per 10K temperature rise.