Danfoss VLT AutomationDrive FC 301, Design Manual, Page: 120 / 200

9.2.3 Tightening of the Cover after
Connections are Made
Enclosure
Type
IP20 IP21 IP55 IP66
A1 * - - -
A2 * * - -
A3 * * - -
A4/A5 - - 2 2
B1 - * 2.2 2.2
B2 - * 2.2 2.2
B3 * - - -
B4 * - - -
C1 - * 2.2 2.2
C2 - * 2.2 2.2
C3 2 - - -
C4 2 - - -
* = No screws to tighten
- = Does not exist
Table 9.2 Tightening of the Cover (Nm)
9.3 Mains Connection
It is mandatory to ground the mains connection properly
using terminal 95 of the frequency converter, see
chapter 9.1.1 Grounding .
The ground connection cable cross section must be at
least 10 mm
2 or 2 x rated mains wires terminated
separately according to EN 50178.
Use unscreened cable.
3 Phase
power
input
130BA026.10
91 (L1)
92 (L2)
93 (L3)
95 PE
Illustration 9.16 Mains Connection
NOTICE
Using fuses and/or circuit breakers on the supply side is
mandatory to ensure compliance with IEC 60364 for CE
or NEC 2009 for UL, see
chapter 9.3.1.4 UL Compliance .
NOTICE
Exceeding 480 V RMS
RISK OF DAMAGE TO THE FREQUENCY
CONVERTER WITH RFI FILTER INSTALLED
When installed on a delta-grounded grid or an IT grid
(including ground fault condition), mains input voltage
in the range of 380-500 V (T4,T5) must not exceed 480 V
RMS between mains and ground.
For some enclosures, the mounting is different if the
frequency converter is configured from factory with a
mains switch. The various scenarios are illustrated in the
following.
Mains connection for enclosures A1, A2 and A3:
NOTICE
The power plug connector can be used on frequency
converters up to 7.5 kW.
1. Fit the 2 screws in the de-coupling plate, slide it
into place and tighten the screws.
2. Make sure the frequency converter is properly
grounded. Connect to ground connection
(terminal 95). Use screw from the accessory bag.
3. Place plug connector 91 (L1), 92 (L2), 93 (L3) from
the accessory bag onto the terminals labelled
MAINS at the bottom of the frequency converter.
4. Attach mains wires to the mains plug connector.
5. Support the cable with the supporting enclosed
brackets.
Electrical Installation
VLT
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
118 MG33BF02 - Rev. 2013-12-20
9 9