Terminal locations - Options cabinet with circuit breaker/ molded case switch (F3 and F4 enclosures)
Figure 3.23: Terminal locations - Options cabinet with circuit breaker/ molded case switch (left side, front and right side view)
1) Earth ground bar
3.3.6 Cooling and Airflow
Cooling
Cooling can be obtained in different ways, by using the cooling ducts in the bottom and the top of the unit, by taking air in and out the back of the unit
or by combining the cooling possibilities.
Duct cooling
A dedicated option has been developed to optimize installation of IP00/chassis frame adjustable frequency drives in Rittal TS8 enclosures utilizing the
fan of the adjustable frequency drive for forced air cooling of the backchannel. The air out the top of the enclosure could but ducted outside a facility so
the heat losses from the backchannel are not dissipated within the control room, thereby reducing the air-conditioning requirements of the facility.
Please see
Installation of Duct Cooling Kit in Rittal enclosures
for further information.
Back cooling
The backchannel air can also be vented in and out the back of a Rittal TS8 enclosure. This offers a solution where the backchannel could take air from
outside the facility and return the heat losses outside the facility thus reducing air-conditioning requirements.
NOTE!
A door fan or fans are required on the Rittal cabinet to remove the losses not contained in the backchannel of the drive. The minimum
door fan airflow required for the D3 and D4 is 391 m^3/h (230 cfm). The minimum door fan airflow required for the E2 is 782 m^3/
h (460 cfm). If additional components or heat losses are added to the enclosure, a calculation must be made to ensure the proper
airflow is provided to cool the inside of the Rittal enclosure.
Airflow
The necessary airflow over the heatsink must be ensured. The flow rate is shown below.
VLT
®
Automation Drive FC 300
Instruction Manual High Power
3 How to Install
MG.33.U2.22 - VLT
®
is a registered Danfoss trademark
3-23
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