Danfoss VLT FC 280 Operating Manual page 125

VLT® Midi Drive FC 280
Operating Guide
9.7 Connection Tightening Torques
Make sure to use the right torques when tightening all electrical connections. Too low or too high torque sometimes causes electri-
cal connection problems. To ensure that correct torques are applied, use a torque wrench. Recommended slot screwdriver type is
SZS 0.6x3.5 mm.
Table 65: Tightening Torques
Enclosure size Power [kW (hp)]
K1 0.37–2.2
(0.5–3.0)
K2 3.0–5.5
(4.0–7.5)
K3 7.5 (10)
K4 11–15
(15–20)
K5 18.5–22
(25–30)
9.8 Fuses and Circuit Breakers
9.8.1 Introduction
Use fuses and/or circuit breakers on the supply side to protect service personnel and equipment from injuries and damage if there is
component breakdown inside the drive (first fault).
Branch circuit protection
Protect all branch circuits in an installation, switchgear, and machines against short circuit and overcurrent according to national/
international regulations.
Integral solid-state short-circuit protection does not provide branch circuit protection. Provide branch circuit protection in ac-
cordance with the national and local rules and regulations.
PERSONAL INJURY AND EQUIPMENT DAMAGE RISK
Malfunction or failing to follow the recommendations may result in personal risk and damage to the drive and other equipment.
-
Select fuses according to recommendations. Possible damages can be limited to be inside the drive.
9.8.2 Recommendation of Fuses
EQUIPMENT DAMAGE
Failure to follow the protection recommendations can result in damage to the drive.
-
Using fuses and/or circuit breakers is mandatory to ensure compliance with IEC 60364 for CE.
Danfoss recommends using the fuses and circuit breakers in the following tables to ensure compliance with UL 508C or IEC
61800-5-1. For non-UL applications, design circuit breakers for protection in a circuit capable of delivering a maximum of 50000 A
Danfoss A/S © 2022.02
Torque [Nm (in-lb)]
Mains Motor DC connection
0.8 (7.1) 0.8 (7.1) 0.8 (7.1)
0.8 (7.1) 0.8 (7.1) 0.8 (7.1)
0.8 (7.1) 0.8 (7.1) 0.8 (7.1)
1.2 (10.6) 1.2 (10.6) 1.2 (10.6)
1.2 (10.6) 1.2 (10.6) 1.2 (10.6)
N O T I C E
W A R N I N G
N O T I C E
Brake Ground Control
0.8 (7.1) 1.6 (14.2) 0.4 (3.5)
0.8 (7.1) 1.6 (14.2) 0.4 (3.5)
0.8 (7.1) 1.6 (14.2) 0.4 (3.5)
1.2 (10.6) 1.6 (14.2) 0.4 (3.5)
1.2 (10.6) 1.6 (14.2) 0.4 (3.5)
AQ381425076031en-000101 / 130R1223 | 125
Specifications
Relay
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
rms