Mains Connection; External Fan Supply; Fuses - Danfoss VLT HVAC Drive FC 102 Operating Instructions Manual

Electrical Installation
4 4
Illustration 4.11 Mounting of EMC Shield

4.1.12 Mains Connection

Connect mains to terminals 91, 92 and 93. Connect ground
to the terminal to the right of terminal 93.
Terminal
number
91, 92, 93
94
Table 4.9 Mains Terminals Connection
CAUTION
Check the nameplate to ensure that the mains voltage of
the frequency converter matches the power supply of
the plant.
Ensure that the supply can supply the necessary current to
the frequency converter.
If the unit is without built-in fuses, ensure that the
appropriate fuses have the correct current rating.
46
Operating Instructions
Function
Mains R/L1, S/L2, T/L3
Ground
Danfoss A/S © 08/2014 All rights reserved.

4.1.13 External Fan Supply

If the frequency converter 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 Function
number
100, 101 Auxiliary supply S, T
102, 103 Internal supply S, T
Table 4.10 External Fan Supply Terminals
The connector on the power card provides the connection
of mains 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 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
frequency converter (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 break-down internally in the frequency
converter.
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.
NOTICE
The recommendations do not cover branch circuit
protection for UL.
Short-circuit protection
Danfoss recommends using the fuses/circuit breakers
mentioned in this section to protect service personnel and
property in case of component breakdown in the
frequency converter.
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