4-2 Selecting An External Resistor
Protecting External Resistor Packages
Figure 4.1 External Brake Resistor Circuitry
!
ATTENTION: PowerFlex drives do not offer protection for externally
mounted brake resistors. A risk of fire exists if external braking
resistors are not protected. External resistor packages must be
self-protected from over temperature or the protective circuit show
below, or equivalent, must be supplied.
Power On
R (L1)
S (L2)
T (L3)
Power Source DB Resistor Thermostat
Power Off
M
M
(Input Contactor) M
Three-Phase
AC Input
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