Danfoss VLT Micro Drive FC 51 - Fuses

Power [kW (hp)]
Height [mm (in)]
Width [mm (in)]
Depth
[mm (in)]
(1)
Maxi-
mum
weight
M5
–
18.5–22.0 (25–
30)
335 (13.2)
387.5 (15.3)
315 (12.4)
165 (6.5)
140 (5.5)
248 (9.8)
9.1
1
For LCP with potentiometer, add 7.6 mm (0.3 in).
3.4 Tightening of Terminals
N O T I C E
All cabling must comply with national and local regulations on cable cross-sections and ambient temperature. Copper conduc-
tors required, 60–75 °C (140–167 °F) recommended.
Table 3: Tightening of Terminals
Power [kW (hp)]
Torque [Nm (in-lb)]
Enclo-
sure
1x200–240 V
3x380–480 V
Line
Motor
DC connection/
brake
Control termi-
nals
Ground
Relay
M1
0.18–0.75
(0.24–1.0)
0.37–0.75
(0.5–1.0)
0.8 (7.1)
0.7 (6.2)
Spade
(1)
0.15 (1.3)
3 (26.6)
0.5 (4.4)
M2
1.5 (2.0)
1.5–2.2 (2.0–3.0)
0.8 (7.1)
0.7 (6.2)
Spade
(1)
0.15 (1.3)
3 (26.6)
0.5 (4.4)
M3
2.2 (3.0)
3.0–7.5 (4.0–10)
0.8 (7.1)
0.7 (6.2)
Spade
(1)
0.15 (1.3)
3 (26.6)
0.5 (4.4)
M4
–
11.0–15.0 (15–20)
1.3 (11.5)
1.3 (11.5)
1.3 (11.5)
0.15 (1.3)
3 (26.6)
0.5 (4.4)
M5
–
18.5–22.0 (25–30)
1.3 (11.5)
1.3 (11.5)
1.3 (11.5)
0.15 (1.3)
3 (26.6)
0.5 (4.4)
1
Spade connectors (6.3 mm (0.25 in) Faston plugs).
3.5 Fuses
3.5.1 Branch Circuit Protection
To prevent re hazards, protect the branch circuits in an installation, switch gear, machines, and so on, against short circuits and
overcurrent. Follow national and local regulations.
3.5.2 Short-circuit Protection
Use the Danfoss recommended fuses to protect service personnel or other equipment if there is an internal failure in the unit or
short circuit on DC-link. If there is a short circuit on the motor or brake output, the drive provides full short-circuit protection.
3.5.3 Overcurrent Protection
To avoid overheating of the cables in the installation, provide overload protection. Always carry out overcurrent protection accord-
ing to national regulations. Fuses must be designed for protection in a circuit capable of supplying a maximum of 100000 A
rms
(symmetrical), 480 V maximum.
3.5.4 Non-UL Compliance
If UL/cUL is not to be complied with, use the fuses mentioned in this chapter, which ensure compliance with EN50178/IEC61800-5-1.
If there is a malfunction, not following the fuse recommendation may result in damage to the drive and the installation.
AQ348848915086en-000101 / 130R094310 | Danfoss A/S © 2020.09
Installation
VLT® Micro Drive FC 51
Operating Guide