Emerson Unidrive M201 Installation Manual page 67

Table 4-6 Braking transistor turn on voltage
Drive voltage rating
200 V
400 V
575 V
690 V
When a braking resistor is used, Pr 00.015 (Pr 00.028 on Unidrive M200 to M400) should
NOTE
be set to FASt ramp mode.
4.9.1 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 4-11 on page 69.
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
4.12.5 Compliance with generic emission standards on page 72 for further details.
Internal connection does not require the cable to be armored or shielded.
Table 4-7 Minimum resistance values and peak power rating for the braking resistor at 40 °C (104 °F)
Minimum resistance
Model
200 V
07200610
07200750
07200830
08201160
08201320
09201760 (9A)
09202190 (9A)
09201760 (9E)
09202190 (9E)
10202830
10203000
400 V
07400660
07400770
07401000
08401340
08401570
09402000 (9A)
09402240 (9A)
Unidrive M / HS Frame 7 to 10 Power Installation Guide
Issue Number: 5
*
Instantaneous power rating
Ω
4.5
4.5
4.5
2.3
2.3
2
2
1.4
1.4
1.7
1.7
7.5
7.5
7.5
6.3
6.3
3.6
3.6
DC bus voltage level
390 V
780 V
930 V
1120 V
Continuous power rating
kW
37.6
37.6
37.6
73.5
73.5
84.5
84.5
120.8
120.8
99.5
99.5
90.2
90.2
90.2
107.4
107.4
187.8
187.8
kW
15
18.5
22
30
37
45
45
45
55
75
90
30
37
45
55
75
90
110
67