Tightening Of Terminals; Fuses; Branch Circuit Protection; Short-Circuit Protection - Danfoss VLT Micro Drive FC 51 Operating Manual

VLT® Micro Drive FC 51
Operating Guide
Power [kW (hp)]
M5 – 18.5–22.0 (25–
30)
For LCP with potentiometer, add 7.6 mm (0.3 in).
1

3.4 Tightening of Terminals

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)]
Enclo- 1x200–240 V
sure
M1 0.18–0.75
(0.24–1.0)
M2 1.5 (2.0)
M3 2.2 (3.0)
M4 –
M5 –
Spade connectors (6.3 mm (0.25 in) Faston plugs).
1

3.5 Fuses

3.5.1 Branch Circuit Protection

To prevent fire 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
(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.
10 | Danfoss A/S © 2020.09
Height [mm (in)]
335 (13.2) 387.5 (15.3)
N O T I C E
Torque [Nm (in-lb)]
3x380–480 V Line
0.8 (7.1)
0.37–0.75
(0.5–1.0)
1.5–2.2 (2.0–3.0) 0.8 (7.1)
3.0–7.5 (4.0–10) 0.8 (7.1)
11.0–15.0 (15–20) 1.3 (11.5)
18.5–22.0 (25–30) 1.3 (11.5)
Width [mm (in)]
315 (12.4) 165 (6.5)
Motor DC connection/
brake
0.7 (6.2) Spade
(1)
0.7 (6.2) Spade
(1)
0.7 (6.2) Spade
(1)
1.3 (11.5) 1.3 (11.5)
1.3 (11.5) 1.3 (11.5)
Installation
Depth Maxi-
[mm (in)] mum
(1)
weight
140 (5.5) 248 (9.8) 9.1
Control termi- Ground Relay
nals
0.15 (1.3) 3 (26.6) 0.5 (4.4)
0.15 (1.3) 3 (26.6) 0.5 (4.4)
0.15 (1.3) 3 (26.6) 0.5 (4.4)
0.15 (1.3) 3 (26.6) 0.5 (4.4)
0.15 (1.3) 3 (26.6) 0.5 (4.4)
rms
AQ348848915086en-000101 / 130R0943