Definitions
Maximum continuous braking power. The braking is considered continuous if the braking time exceeds
30 seconds.
P
brcont
Maximum braking power of the inverter module and its internal brake chopper. The inverter and
chopper will withstand this braking power for 1 second within every 10 seconds.
Note:
The listed resistors will withstand this braking power for 1 second within every 120 seconds.
P
brmax
Minimum allowed resistance of the brake resistor.
R
min
Resistance of the listed resistor.
R
Continuous power (heat) dissipation of the listed resistor when placed correctly.
P
n
Short energy pulse that the listed resistor will withstand every 400 seconds.
E
R
The ratings apply at an ambient temperature of 40 °C (104 °F).
The listed brake resistors are protected to IP20. Refer to Resistor dimensions (page 337) for
dimensions, wire sizes and tightening torques for the resistors.
336 Resistor braking using frames R1i…R4i inverter modules
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