Manual Power Quality Filter PQFM
Mechanical design and installation 33
Figure 13: Cooling air flow for a 3 units PQFM mounted on optional base f’rame
When the natural cooling capacity at the location where the filter is installed is not
sufficient, air conditioning systems have to be added to the room. In the design of the
air conditioning systems, the filter heat losses have to be taken into account.
gives an overview of the PQFM heat losses for the different power units. For multi-unit
filters, the values of
have to be multiplied by the number of filter units. One
cubicle contains one filter unit.
Table 15: Filter unit heat losses
Network voltage U (Vrms)
Unit rating (Arms)
Heat loss (kW)
208
≤
Ue
≤
480
70
≤
2.3
100
≤
2.8
130
≤
3.5
150
≤
5.0
480
≤
Ue
≤
690 (for CE version)
480
≤
Ue
≤
600 (for cUL version)
100
≤
3.6
5.4 Standard cubicle dimensions, fixing holes and clearances
Standard PQFM cubicles are of the Rittal TS8 type and have dimensions of 600 x 600 x
2150 mm (Width x Depth x Height). The cubicles have an elevated roof with lifting lugs.
Each cubicle contains one power unit and is fitted with its own main contactor. Power
