Terminal locations - Options Cabinet with circuit breaker/ molded case switch (F3 and F4)
Illustration 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 frequency converters in Rittal TS8 enclosures utilizing the fan of
the frequency converter for forced air cooling of the backchannel. The air out the top of the enclosure could but ducted outside a facility so the heat loses
from the backchannel are not dissipated within the control room reducing 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 ventilated 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 loses outside the facility thus reducing air-conditioning requirements.
NB!
A doorfan(s) is required on the Rittal cabinet to remove the loses not contained in the backchannel of the drive. The minimum doorfan(s)
airflow required at the drive maximum ambient for the D3 and D4 is 391 m^3/h (230 cfm). The minimum doorfan(s) airflow required
at the drive maximum ambient for the E2 is 782 m^3/h (460 cfm). If the ambient is below maximum or if additional components, heat
loses, are added within 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 heat sink must be secured. The flow rate is shown below.
3 How to Install
VLT AQUA High Power Operation Instructions
34
MG.20.P3.02 - VLT
®
is a registered Danfoss trademark
3
