Danfoss VLT FC Series Service Manual page 117

Test Procedures
Replace the corresponding current sensor if the reading is
greater than 15 mV.
Table 8.8 and Table 8.9 list approximate resistance readings
for individual D-sized units based on power and voltage
rating, and the current scaling card. Table 8.10 through
Table 8.13 list approximate resistance readings for parallel
drive systems based on power and voltage rating, and the
current scaling card. When measuring with the signal test
board, the reading could be higher due to meter lead
resistance. A reading of no resistance indicates a missing
scaling card.
Scaling resistance
measured in Ω
FC 102, FC 103, and
FC 202
3.8 N55K
3.1 N75K
2.6 N90K
2.6 N110
5.1 N150
4.2 N160
Table 8.7 Scaling Resistance, D1h–D4h Units, 200–240 V
Scaling resistance
measured in Ω
FC 102, FC 103, and
FC 202
4.6 N110
3.8 N132
3.1 N160
2.6 N200
5.1 N250
4.2 N315
Table 8.8 Scaling Resistance, D1h–D8h Units, 380–480/500 V
Scaling resistance
measured in Ω
FC 102, FC 103, and
FC 202
5.9 N75k
5.9 N90k
5.9 N110
5.9 N132
5.0 N160
4.0 N200
3.2 N250
2.7 N315
5.6 N400
Table 8.9 Scaling Resistance, D1h–D8h Units, 525–690 V
MG94A502
Service Guide
Model
FC 302
N45K
N55K
N75K
N90K
N110
N150
Model
FC 302
N90k
N110
N132
N160
N200
N250
Model
FC 302
N55k
N75k
N90k
N110
N132
N160
N200
N250
N315
Danfoss A/S © 02/2019 All rights reserved.
Scaling resistance Model
measured in Ω
FC 102, FC 103,
and FC 202
4.2 N500
2.6 N560
5.1 N630
5.1 N710
4.2 N800
4.2 N1M0
Table 8.10 Scaling Resistance, Parallel Drive Systems,
6-pulse, 380–500 V
Scaling resistance Model
measured in Ω
FC 102, FC 103,
and FC 202
5.6 N630
3.2 N710
2.7 N800
2.7 N900
5.6 N1M0
5.6 N1M2
Table 8.11 Scaling Resistance, Parallel Drive Systems,
6-pulse, 525–690 V
Scaling resistance Model
measured in Ω
FC 102, FC 103,
and FC 202
2.6 N315
5.1 N355
5.1 N400
4.2 N450
4.2 N500
2.5 N560
5.1 N630
5.1 N710
4.2 N800
4.2 N1M0
Table 8.12 Scaling Resistance, Parallel Drive Systems,
12-pulse, 380–500 V
Drive modules
FC 302
N450 2-module system
N500 4-module system
N560 4-module system
N630 4-module system
N710 4-module system
N800 4-module system
Drive modules
FC 302
N560 2-module system
N630 4-module system
N710 4-module system
N800 4-module system
N900 4-module system
N1M0 4-module system
Drive modules
FC 302
N250 2-module system
N315 2-module system
N355 2-module system
N400 2-module system
N450 2-module system
N500 4-module system
N560 4-module system
N630 4-module system
N710 4-module system
N800 4-module system
115
8 8