Illustration 3.18: Position of earth terminals IP21 (NEMA type 1) and IP54 (NEMA type 12)
Cooling
Cooling can be obtained in different ways, by using the cooling ducts in the bottom and the top
of the unit, by using the ducts in the rear of the unit or by combining the cooling possibilities.
Airflow
The necessary airflow over the heat sink must be secured. The flow rate is shown below.
Enclosure
Door fan / Top fan
airflow
Airflow over heat-
sink
IP21 / NEMA 1 &
IP54 / NEMA 12
D1 and D2
170 m
3
/h (100 cfm)
765 m
3
/h (450 cfm)
E1
340 m
3
/h (200 cfm)
1444 m
3
/h (850 cfm)
IP00 / Chassis
D3 and D4
255 m
3
/h (150 cfm)
765 m
3
/h (450 cfm)
E2
255 m
3
/h (150 cfm)
1444 m
3
/h (850 cfm)
Table 3.2: Heatsink Air Flow
3. How to Install
VLT
®
Automation Drive FC 300
Operating Instructions High Power
28
MG.33.U1.02 - VLT
®
is a registered Danfoss trademark
3