Connection Tightening Torques; Fuses And Circuit Breakers - Danfoss VLT Midi Drive FC 280 Operating Instructions Manual

Specifications

9.7 Connection Tightening Torques

Make sure to use the right torques when tightening all electrical connections. Too low or too high torque may cause
electrical connection problems. Use a torque wrench to ensure that correct torques are applied.
Enclosure
type
K1
K2
K3
K4
K5
Table 9.3 Tightening Torques

9.8 Fuses and Circuit Breakers

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
frequency converter (first fault).
9 9
Branch circuit protection
Protect all branch circuits in an installation (including
switch gear and machines) against short circuit and
overcurrent according to national/international regulations.
NOTICE
The recommendations do not cover branch circuit
protection for UL.
Table 9.4 lists the recommended fuses and circuit breakers
that have been tested.
WARNING
PERSONAL INJURY AND EQUIPMENT DAMAGE RISK
Malfunction or failing to follow the recommendations
may result in personal risk and damage to the frequency
converter and other equipment.
•
Select fuses according to recommendations.
Possible damage can be limited to be inside the
frequency converter.
NOTICE
Using fuses and/or circuit breakers is mandatory to
ensure compliance with IEC 60364 for CE.
52
VLT
Power [kW (hp)] Mains
0.37–2.2 (0.5–3.0) 0.8 (7.1)
3.0–5.5 (4.0–7.5) 0.8 (7.1)
7.5 (10) 0.8 (7.1)
11–15 (15–20) 1.2 (10.6)
18.5–22 (25–30) 1.2 (10.6)
Danfoss A/S © 11/2015 All rights reserved.
®
Midi Drive FC 280
Torque [Nm (in-lb)]
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)
1.2 (10.6) 1.2 (10.6)
1.2 (10.6) 1.2 (10.6)
Danfoss recommends using the fuses and circuit breakers
in Table 9.4 on a circuit capable of delivering 5000 A
(symmetrical), 380–480 V depending on the frequency
converter voltage rating. With the proper fuses and/or
circuit breakers, the frequency converter short-circuit
current rating (SCCR) is 5000 A
Enclosure
size
K1
K2
K3
K4
K5
Table 9.4 CE Fuse, 380–480 V
Brake Ground
0.8 (7.1) 3 (26.6)
0.8 (7.1) 3 (26.6)
0.8 (7.1) 3 (26.6)
1.2 (10.6) 1.6 (14.2)
1.2 (10.6) 1.6 (14.2)
.
rms
Power [kW CE compliance
(hp)] fuse
0.37–2.2 (0.5–
gG-20
3.0)
3.0–5.5 (4.0–
gG-25
7.5)
7.5 (10) gG-25
11–15 (15– gG-50
20)
18.5–22 (25–
gG-80
30)
Control/relay
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
0.5 (4.4)
rms
LVD circuit breaker
PKZM0-16
PKZM0-20
PKZM0-25
–
–
MG07A102