Nidec Commander C200 Power Installation Manual page 62

Table 4-6 Heatsink mounted braking resistor data
Part number
DC resistance at 25 C
Peak instantaneous power over 1 ms at nominal resistance
Average power over 60 s *
Ingress Protection (IP) rating
Maximum altitude
* To keep the temperature of the resistor below 70 °C (158 °F) in a 30 °C (86 °F) ambient, the
average power rating is 100 W. The above parameter settings ensure this is the case.
4.10.2 External braking resistor
Overload protection
When an external braking resistor is used, it is essential that an overload protection device
is incorporated in the braking resistor circuit; this is described in Figure 4-8 on page 65.
WARNING
When a braking resistor is to be mounted outside the enclosure, ensure that it is mounted in a
ventilated metal housing that will perform the following functions:
• Prevent inadvertent contact with the resistor
• Allow adequate ventilation for the resistor
When compliance with EMC emission standards is required, external connection requires the cable
to be armored or shielded, since it is not fully contained in a metal enclosure. See section
3.5.1 Enclosure layout on page 32 for further details.
Internal connection does not require the cable to be armored or shielded.
62
Parameter
Unidrive M/HS Frame 5 to 6 Power Installation Guide
Size 5
1299-0003
37.5 
16 kW
100 W
IP54
2000 m
Issue Number: 8