Airflow And Cooling Requirements - ABB PQFM Instruction Manual

WARNING: Conductive dust may cause damage to this equipment. Ensure that the
filter is installed in a room where no conductive dust is present.
The filter foundations have to be leveled and must be able to support the weight of the
filter. Table 14
that one cubicle contains always one unit. For multi-unit filters the total weight can be
obtained by multiplying the weight of one cubicle by the number of cubicles (ignoring
the base frame weight).
Network voltage U (Vrms)
208 £ Ue £ 480
480 £ Ue £ 690 (for CE version)
480 £ Ue £ 600 (for cUL version)
Active filters produce a certain level of noise when they operate. The noise level depends
on the operating conditions of the unit. The maximum typical noise level is 69.6dBA. This
value should be taken into account when choosing a location for the filter.
5.3

Airflow and cooling requirements

The PQFM dissipates an amount of heat that has to be evacuated out of the room where
the filter is located. Otherwise, excessive temperature rise may be experienced. Please
note that life of the electrical equipment decreases drastically if the operating
temperature exceeds the allowable limit (divided by 2 every 10°C/23°F).
Each PQFM power unit has its own cooling fans. For cubicle versions of filter, the air
intakes are located in the cabinet front doors. The same approach is recommended to
panel builders that integrate filter panels in their own cabinets. From the door intakes,
the air flows through the cabinets and is then routed to the top of the cabinets. For
proper cooling, a minimum airflow of 700 m
cubicle. Please ensure that the air used for cooling is regularly renewed and does not
contain conductive particles, significant amounts of dust, or corrosive or otherwise
harmful gases. The cooling air intake temperature must not exceed 40°C/104°F for
filters that are not derated. For higher temperatures, apply the derating guidelines given
in Table 13. The hot exhaust air also has to be properly ducted away.
cooling air flow diagram for a 3 unit PQFM.
32 Mechanical design and installation ç Manual Power Quality Filter PQFM
gives the weight for one cubicle depending on the unit rating. Please note
Table 14: Weight of a PQFM-cubicle for different unit ratings
Unit rating (Arms)
70
100
130
150
100
Approximate cubicle weight (kg)
260
3 /h of cooling air has to be supplied to each
Figure 13 shows the