•
•
•
Enclosure size
Drive type
The minimum brake resistance [Ω]
Brake power @1166 V DC [kW]
(1)
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.
Table 60: Internal Brake Resistors, FR4–FR6
Enclosure size
Resistance [Ω]
Energy 2 s full torque braking [kJ]
Average power 1 pulse/min [W]
FR4 (380–500 V)
120
4
45
FR5 (380–500 V)
55
8.9
100
FR6 (380–500 V)
30
16
175
0.00
0.20
0.40
0.60
0.80
1.00
1.20
A
0
2
4
6
8
10
20
30
40
50
60
e3
0b
h8
34
.1
0
A
Time (s)
Illustration 76: Relative Power Handling Capability of Internal Resistors
12.10 Faults and Alarms
12.10.1 Fault 1 - Overcurrent, Subcode S1- Hardware trip
Cause
There is too high a current in the motor cable. Its cause can be 1 of the following:
a sudden heavy load increase
a short circuit in the motor cables
the motor is not the correct type
AQ275638903263en-000601 / DPD00910 | 171
Danfoss A/S © 2022.12
Specifications
VACON® NXS/NXP Air-cooled
Operating Guide
