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Operating Guide | VACON® NXS/NXP Air-cooled
12.9.4 Brake Chopper Ratings for Mains Voltage 525–690 V
Table 60: Brake Chopper Ratings for VACON
Enclosure size
Drive type
FR6
0004
0005
0007
0010
0013
0018
0022
0027
0034
FR7
0041
0052
FR8
0062
0080
0100
FR9
0125
0144
0170
0208
FR10
0261
0325
0385
0416
FR11
0460
0502
0590
1
When using recommended resistor types. Peak power capability of the brake chopper can be calculated with DC-link voltage (Udc) and brake resistor resistance Rb by Udc
12.9.5 Internal Brake Resistors, FR4–FR6 (380–500 V)
The enclosure sizes FR4, FR5, and FR6 (380–500 V) can be equipped with an internal brake resistor as a factory option. The brake
resistors are designed for a 2 s full torque braking from nominal motor speed to zero or a 1 s full power braking every minute.
Danfoss A/S © 2020.02
®
NXS/NXP AC Drives, Mains Voltage 525–690 V, 50/60 Hz, 3~
The minimum brake resistance [Ω]
100
100
100
100
100
30
30
30
30
18
18
9
9
9
6.7
6.7
6.7
6.7
2.5
2.5
2.5
2.5
1.7
1.7
1.7
Specifications
Brake power @1166 V DC [kW]
(1)
3.0
4.0
5.5
7.5
11.0
15.0
18.5
22.0
30.0
37.5
45.0
55.0
75.0
90.0
110.0
132.0
160.0
194.2
250.0
315.0
355.0
400.0
450.0
500.0
560.0
AQ275638903263en-000301 / DPD00910| 197
2
/Rb.
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