Recommended Brake Resistors - Danfoss VLT AQUA Drive FC 202 Design Manual

Type code and Selection

6.2.5 Recommended Brake Resistors

Line power Voltage class
P Rated motor size for adjustable frequency drive type
m
R Minimum permissible brake resistor by adjustable frequency drive
min
R Recommended brake resistor resistance of Danfoss brake resistors
rec
Thermo relay Brake current setting of external thermo relay
Part number Danfoss brake resistor order numbers
Cable cross-section Recommended minimum value based upon PVC insulated copper cable. 30 °C (86 °F) ambient temperature with
normal heat dissipation
P Brake resistor average rated power. The temperature switch enables at approximate 90% of continuous rated
br,cont.
power at brake resistors with IP54, IP21 and IP65 enclosure protection
R The nominal (calculated) resistor value to ensure a braking energy on motor shaft of 150/160/110% for 1 minute
br,nom
Table 6.6 Abbreviations used in Table 6.7 to Table 6.14
MG20N622
Design Guide
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