Table 61: 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 82: 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
Troubleshooting
•
Check the load.
•
Check the motor.
•
Check the cables and connections.
•
Make an identification run.
12.10.2 Fault 1 - Overcurrent, Subcode S2 - Current cutter supervision (VACON® NXS)
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
Specifications
Operating Guide | VACON® NXS/NXP Air-cooled
AQ275638903263en-000301 / DPD00910
198 | Danfoss A/S © 2020.02
