1.4.6 24 V External Supply
Back up of control supply with 24 V DC is available in EX and EB versions of FCD 300.
1.4.7 RFI Filter
FCD 300 has an integral 1A RFI-filter. The integral 1A RFI filter complies with EMC standards EN 55011-1A. See the sections
Cable lengths
and
Cross
section
for further details.
1.4.8 Harmonic Filter
The harmonic currents do not affect power consumption directly, but they increase the heat losses in the installation (transformer, cables). That is why
in a SYSTEM with a relatively high percentage of rectifier load it is important to keep the harmonic currents at a low level so as to avoid a transformer
overload and high cable temperature. For the purpose of ensuring low harmonic currents, the FCD 300 units are fitted with coils in their intermediate
circuit as standard. This reduces the input current I
RMS
by typically 40 %.
1.4.9 Display Unit
On the FCD 300 unit there are 5 indicator lamps for voltage (ON), warning, alarm, status and bus.
In addition, a plug for connecting an LCP control panel is available as an option. The LCP control panel can be installed up to 3 metres away from the
frequency converter, e.g. on a front panel, by means of a mounting kit.
All displays of data are via a 4-line alpha-numerical display, which in normal operation is able to show 4 operating data items and 3 operation modes
continuously. During programming, all the information required for quick, efficient parameter Setup of the frequency converter is displayed. As a sup-
plement to the display, the LCP has three indicator lamps for voltage (ON), warning (WARNING) and alarm (ALARM). Most of the frequency converter's
parameter Setups can be changed immediately via the LCP control panel. See also the section entitled
The LCP control unit
in the Design Guide.
1.4.10 Desired Features
Desired features are selected by specifying the corresponding fields in the string (xx). The choices - and detailed explanation - shown in the two tables.
Short form explanations of a feature are
italic
.
For technical details and data, see
Technical data
.
Installation Box Variants
Connections on right side
Gland holes for all
cable inlets
are machined on the
right side
only (seen from motor drive end). This version is useful where cable inlet is required from
one direction only.
Connections on two sides
Gland holes for
cable inlets
are machined
on both sides
allowing for cable inlet from both directions.
Both
metric thread
and
NPT thread
is available (selected variants).
Pluggable
connection and the possibility of looping mains power supply between drives (4 mm
2
line).
The bottom section contains Cage Clamp connectors and looping facilities for power and fieldbus cables well protected against dust, hosing and cleaning
agents.
Service switch
mounted on the right side (seen from motor drive end). A lockable switch integrated in the enclosure – disconnecting the motor or drive.
1 The Decentral Concept
VLT
®
Decentral FCD 300 Design Guide
18
MG.90.S1.02 - VLT
®
is a registered Danfoss trademark
1