12.9.4 Brake Chopper Ratings for Mains Voltage 525–690 V
Table 60: Brake Chopper Ratings for VACON
®
NXS/NXP AC Drives, Mains Voltage 525–690 V, 50/60 Hz, 3~
Enclosure size
Drive type
The minimum brake resistance [Ω]
Brake power @1166 V DC [kW]
(1)
FR6
0004
100
3.0
0005
100
4.0
0007
100
5.5
0010
100
7.5
0013
100
11.0
0018
30
15.0
0022
30
18.5
0027
30
22.0
0034
30
30.0
FR7
0041
18
37.5
0052
18
45.0
FR8
0062
9
55.0
0080
9
75.0
0100
9
90.0
FR9
0125
6.7
110.0
0144
6.7
132.0
0170
6.7
160.0
0208
6.7
194.2
FR10
0261
2.5
250.0
0325
2.5
315.0
0385
2.5
355.0
0416
2.5
400.0
FR11
0460
1.7
450.0
0502
1.7
500.0
0590
1.7
560.0
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
2
/Rb.
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.
Specifications
Operating Guide | VACON® NXS/NXP Air-cooled
AQ275638903263en-000301 / DPD00910| 197
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