4.1.11 Shielding against Electrical Noise
To ensure best EMC performance, mount the EMC metal
cover before mounting the line power cable.
NOTICE!
The EMC metal cover is only included in units with an
RFI filter.
175ZT975.10
Figure 4.11 Mounting of EMC Shield
4.1.12 AC line input connections
Connect line power to terminals 91, 92 and 93. Connect
ground to the terminal to the right of terminal 93.
Terminal
number
Function
91, 92, 93
94
Line power R/L1, S/L2, T/L3
Ground
Table 4.9 Line Terminals Connection
CAUTION
Check the nameplate to ensure that the AC line voltage
of the adjustable frequency drive matches the power
supply of the plant.
Ensure that the supply can supply the necessary current to
the adjustable frequency drive.
If the unit is without built-in fuses, ensure that the
appropriate fuses have the correct current rating.
4.1.13 External Fan Supply
If the adjustable frequency drive is supplied by DC, or if
the fan must run independently of the power supply, apply
an external power supply. The connection is made on the
power card.
Terminal
number
Function
100, 101
102, 103
Auxiliary supply S, T
Internal supply S, T
Table 4.10 External Fan Supply Terminals
The connector on the power card provides the connection
of line voltage for the cooling fans. The fans are connected
from factory to be supplied from a common AC line
(jumpers between 100–102 and 101–103). If an external
supply is needed, the jumpers are removed and the supply
is connected to terminals 100 and 101. Use a 5 A fuse for
protection. In UL applications, use a Littelfuse KLK-5 or
equivalent.
4.1.14 Fuses
Use fuses and/or circuit breakers on the supply side as
protection in case of component break-down inside the
adjustable frequency drive (first fault).
NOTICE!
Using fuses and/or circuit breakers is mandatory to
ensure compliance with IEC 60364 for CE or NEC 2009 for
UL.
WARNING
Protect personnel and property against the consequence
of component breakdown internally in the adjustable
frequency drive.
Branch circuit protection
To protect the installation against electrical and fire hazard,
protect all branch circuits in an installation, switch gear,
machines, etc. against short circuit and overcurrent
according to national/international regulations.
Electrical Installation
VLT
®
HVAC Drive FC 102
50
Danfoss A/S © 08/2014 All rights reserved.
MG11F522
4
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Summary of Contents for VLT HVAC Drive FC 102
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