Size 3 And 4 Internal Braking Resistor - Emerson Unidrive M700 Installation Manual

Table 3-4 Environmental considerations
Environment
Clean
Dry, dusty (non-conductive)
Dry, dusty (conductive)
IP65 compliance
A current derating must be applied to the drive if the high IP insert is installed. Derating
NOTE
information is provided in Chapter 5 Technical data on page 76
Failure to do so may result in nuisance tripping.
When designing an IP65 (NEMA 12) enclosure (Figure 3-15 Example of IP65 (sizes 3 to
NOTE
4) (NEMA 12) through-panel layout on page 33), consideration should be made to the
dissipation from the front of the drive.
Table 3-5 Power losses from the front of the drive when through-panel mounted
Frame size
3
4
3.10

Size 3 and 4 internal braking resistor

Size 3 and 4 have been designed with an optional space-saving heatsink mounted resistor. The
resistor can be installed within the heatsink fins of the drive. When the heatsink resistor is used, an
external thermal protection device is not required as the resistor is designed such that it will fail safely
under any fault conditions. The in-built software overload protection is set-up at default to protect the
resistor. The resistor is rated to IP54 (NEMA 12).
Table 3-6 Size 3 and 4 internal braking resistor part numbers
Frame size
3
4
The internal / heatsink mounted braking resistors must only be used with the following
drives. Brake resistor 1220-2752 must only be used with size 3 drives. Brake resistor
1299-0003 must only be used with size 4 drives.
WARNING
Unidrive M/HS Frame 3 and 4 Power Installation Guide
Issue Number: 3
High IP insert
Not installed
Installed
Installed Regular cleaning recommended
Installed
Part number
Comments
Power loss
≤ 50 W
≤ 75 W
1220-2752
1299-0003
37