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 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

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 enclosure to remove the heat losses not contained in the backchannel of the drive and any additional

losses generated from other components installed inside the enclosure. The total required air flow must be calculated so that the

appropriate fans can be selected. Some enclosure manufacturers offer software for performing the calculations (i.e. Rittal Therm

software). If the drive is the only heat generating component in the enclosure, the minimum airflow required at an ambient temperature

of 45

C for the D3 and D4 drives is 391 m

Airflow

The necessary airflow over the heat sink must be secured. The flow rate is shown below.

Enclosure protection

IP21 / NEMA 1