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BasicInstallation 3-23MN1942

3.6 Regeneration resistor (Dynamic Brake resistor)
Anopt ional external regeneration resistor may be required to dissipate exc ess power from the
internalDC busduring motor deceleration. The regeneration resistor must have a resistance of
atleas t 39, an inductance of less than 100µH, and a minimum power rating of 44W. Suitable
regenerationresistor s are listed in section A.1.4. The regeneration resis toroutput isconditionally
short-circuit proof.
Regeneration
resistor
STAR
POINT
Earth/groundouter
shield,using 360°
conductiveclamp
connectedto
enclosurebackplane
Connectouter shield
toresistor body
Figure11 - Regeneration resistor connections
DANGER: Electrical shoc k hazard. DC bus voltages may be present at these
terminals. A regeneration resistor may generate enough heat to ignit e
combustible materials. Toavoid fire haz ard, keep all combustible materials
andflammable vapor s away from the resistor.