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A door fan(s) is required on the enclosure to remove the
heat not contained in the backchannel of the frequency
converters and any additional losses generated by other
components inside the enclosure. The total required air
flow must be calculated so that the appropriate fans can
be selected.
Airflow
The necessary airflow over the heat sink must be secured.
The flow rate is shown in
.
The fan runs for the following reasons:
•
AMA
•
DC Hold
•
Pre-Mag
•
DC Brake
•
60% of nominal current is exceeded
•
Specific heatsink temperature exceeded (power
size dependent).
•
Specific Power Card ambient temperature
exceeded (power size dependent)
•
Specific Control Card ambient temperature
exceeded
Enclosure
protection
Frame
Door fan(s)/top
fan
Heatsink fan(s)
IP21/NEMA 1
D1 and D2 170 m
3
/hr (100
CFM)
765 m
3
/hr
(450 CFM)
IP00/Chassis
D3 and D4 255 m
3
/hr (150
CFM)
765 m
3
/hr
(450 CFM)
* Airflow per fan. Frame size F contains multiple fans.
Table 3.2 Airflow
3.3.2 Lifting
Always lift the frequency converter using the dedicated
lifting eyes. Use a bar to avoid bending the lifting holes.
130BC253.10
Illustration 3.1 Position Lifting Straps where Indicated
CAUTION
The angle from the top of the frequency converter to the
lifting cables should be 60
°
or greater.
3.4 Electrical Installation
3.4.1 General Requirements
This section contains detailed instructions for wiring the
frequency converter. The following tasks are described:
•
Wiring the motor to the frequency converter
output terminals
•
Wiring the AC mains to the frequency converter
input terminals
•
Connecting control and serial communication
wiring
•
After power has been applied, checking input
and motor power; programming control terminals
for their intended functions
Installation
VLT® Refrigeration Drive 110-250 kW Operating Instructions
MG16F102 - VLT® is a registered Danfoss trademark
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