4.1.3. Grounding and IT line power
The ground connection cable cross-section must be at least 0.016 in.
2
[10 mm
2
] or
2 rated line power wires terminated separately according to
EN 50178
or
IEC
61800-5-1
, unless national regulations specify otherwise. Always comply with na-
tional and local regulations on cable cross-sections.
The power supply is connected to the main disconnect switch if this is included.
NOTE
Make sure that the line voltage corresponds to the line voltage of the adjustable
frequency drive nameplate.
IT Line
Do not connect 400 V adjustable
frequency drives with RFI filters
to line supplies with a voltage
between phase and ground of
more than 440 V.
For IT lines and delta ground
(grounded leg), line voltage
may exceed 440 V between
phase and ground.
Illustration 4.1: Terminals for line supply and
grounding.
4.1.4. Line power wiring overview
Please refer to the following table for the line power wiring connection instructions.
Enclo-
sure:
A2
(IP 20/IP
21)
A3
(IP 20/IP
21)
A5
(IP 55/IP
66)
B1
(IP 21/IP
55/IP 66)
B2
(IP 21/IP
55/IP 66)
C1
(IP 21/IP
55/66)
C2
(IP 21/IP
55/66)
Motor
size:
200-240 V
1.1-3.0
kW
3.7
kW
1.1-3.7
kW
5.5-11
kW
15
kW
18.5-30
kW
37-45
kW
380-480 V
1.1-4.0
kW
5.5-7.5
kW
1.1-7.5
kW
11-18.5
kW
22-30
kW
37-55
kW
75-90
kW
525-600 V
2.2-4.0
kW
5.5-7.5
kW
Goto:
4.1.5
4.1.6
4.1.7
4.1.8
Table 4.5: Line power wiring table.
4. Electrical installation
VLT
®
HVAC Drive Instruction Manual
30
MG.11.A4.22
-
VLT
®
is a registered Danfoss trademark
4