Product Variant Examples - Danfoss VLT Series Installation Manual

Introduction
See Installation of Duct Cooling Kit in Rittal Enclosures, for
further information.
The remaining heat losses are handled via fans and filter
®
combinations in the VLT Plus Panel front doors.
Door fan
One or more door fans remove the heat losses not
contained in the frequency converter backchannel and any
additional losses generated from other components
installed inside the enclosure. The total required air flow is
calculated with a dedicated software tool and the required
air flow is shown in the panel documentation.
The frequency converter fan runs for the following reasons:
•
AMA.
•
DC hold.
•
Pre-mag.
•
DC brake.
•
60% of nominal current is exceeded.
•
Specific heat sink temperature exceeded (power
size dependent).
•
Specific power card ambient temperature
exceeded (power size dependent).
•
Specific control card ambient temperature
exceeded.
Once the frequency converter fan is started, it runs for
minimum 10 minutes.
The door fans run, whenever the thermostat inside the
panel reaches the adjusted limit. Once the off-setpoint is
reached, it switches the fans off. The duration of the on-
time varies and depends on the load and local conditions,
as well as on the pollution of the air filters.
Cabinet light with power outlet
A light mounted on the cabinet interior increases visibility
during servicing and maintenance. The light housing
includes a power outlet (230 V, 50 Hz, 2.5 A, CE/ENEC) for
temporarily supplying power to tools or other devices.
Transformer taps
The auxiliary supply transformer is factory-set to the
nominal supply voltage of the cabinet. The transformer
taps can be adjusted to the local conditions, to avoid over-
and undervoltage. Additional information is provided in
the documentation for the optional transformer.
MG13B102
Installation Guide
Optional 24 V DC supply
•
•
•
•

1.4.3 Product Variant Examples

1 Air outlet, top
2 Air inlet, control
3 Local control panel
4 Door handle
5 Mains switch
6 Air outlet, control
7 Plinth with air inlet, front (optional)
Illustration 1.1 VLT
Danfoss A/S © 09/2015 All rights reserved.
Specifications: 5 A, 120 W, 24 V DC.
Purpose: Supplying power for customer-supplied
accessory devices, such as:
- Sensors.
-
PLC I/O.
- Contactors.
- Temperature probes.
-
Indicator lights.
- Other electronic hardware used for
internal control/auxiliary circuits.
Protected against output overcurrent, overload,
short circuits, and overtemperature.
Diagnostics include a dry DC-ok contact, a green
DC-ok indicator light, and a red overload
indicator light.
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2
3
4
5
6
7
®
Plus Panel, 90 kW Enclosure
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