Electric Company Computer Drive User Manual

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Basic Installation 3-23MN1942
3.6 Regeneration resistor (Dynamic Brake resistor)
An optional external regeneration resistor may be required to dissipate excess power from the
internal DC bus during motor deceleration. The regeneration resistor must have a resistance of
at least 39Ω, an inductance of less than 100µH, and a minimum power rating of 44W. Suitable
regeneration resistors are listed in section A.1.4. The regeneration resistor output is conditionally
short-circuit proof.
Regeneration
resistor
STAR
POINT
Earth/ground outer
shiel d, using 360°
conductive clamp
connected to
enclos ure backplane
Connect outer s hield
to resistor body
Figure 11 - Regeneration resistor connections
DANGER: Electrical shock hazard. DC bus voltages may be present at these
terminals. A regeneration resistor may generate enough heat to ignite
combustible materials. To avoid fire hazard, keep all combustible materials
and flammable vapors away from the resistor .