Electrical Installation Considerations; Electrical Installation In General; Fastener Torque Ratings; Fuses And Circuit Breakers - Danfoss VLT CDS 803 Manual

VLT® Compressor Drive CDS 803
Design Guide

6 Electrical Installation Considerations

6.1 Electrical Installation in General

All cabling must comply with national and local regulations on cable cross-sections and ambient temperature. Copper conductors
are required. 75 °C (167 °F) is recommended.

6.1.1 Fastener Torque Ratings

Table 14: Tightening Torques for Enclosure Sizes H3–H6, 3x200–240 V & 3x380–480 V
Power [kW (hp)]
Enclo- IP protec- 3x200–240 V
sure size tion rat-
ing
H3 IP20 –
H4 IP20 6.0–7.5 (8.0–
10)
H5 IP20 10 (15)
H6 IP20 –

6.2 Fuses and Circuit Breakers

Fuses and circuit breakers ensure that possible damage to the drive is limited to damage inside the unit. Danfoss recommends fuses
on the supply side as protection. For further information, see the application note Fuses and Circuit Breakers found on
foss.com under Service and support/Documentation/Manuals & guides.
Use of fuses on the supply side is mandatory for IEC 60364 (CE) and NEC 2009 (UL) compliant installations.

6.2.1 Recommendation of Fuses and Circuit Breakers

Table 15: Fuses and Circuit Breakers
Circuit breakers
UL
Power [kW (hp)]
3x200–240 V
6.0 (8.0)
7.5 (10) –
10 (15)
3x380–480 V
6.0 (8.0)
7.5 (10)
–
10 (15)
Danfoss A/S © 2021.05
3x380–480 V
6.0–7.5 (8.0–10)
10–15 (15–20)
18.5–22 (25–30)
30 (40)
N O T I C E
(1) Fuse
Non-UL UL
Bussmann
Type RK5
FRS-R-50
– FRS-R-50
FRS-R-80
FRS-R-25
FRS-R-25
–
FRS-R-50
Torque [Nm (in-lb)]
Mains Motor DC connec-
tion
0.8 (7) 0.8 (7) 0.8 (7)
1.2 (11) 1.2 (11) 1.2 (11)
1.2 (11) 1.2 (11) 1.2 (11)
4.5 (40) 4.5 (40) –
Bussmann Bussmann
Type RK1 Type J
KTN-R50 JKS-50
KTN-R50 JKS-50
KTN-R80 JKS-80
KTS-R25 JKS-25
KTS-R25 JKS-25
KTS-R50 JKS-50
Electrical Installation
Considerations
Control ter- Ground
minals
0.5 (4) 0.8 (7)
0.5 (4) 0.8 (7)
0.5 (4) 0.8 (7)
0.5 (4) 3 (27)
www.dan-
Non-UL
Bussmann Maximum fuse
Type T Type gG
JJN-50 gG-50
JJN-50 gG-50
JJN-80 gG-63
JJS-25 gG-25
JJS-25 gG-25
JJS-50 gG-50
AJ330233902305en-000201 / 130R0596 | 45
Relay
0.5 (4)
0.5 (4)
0.5 (4)
0.5 (4)