ABB ACS880 P940 Series, Инструкция к добавке

Страница: 17 / 82

Roof air flow viewed from top:
Minimum air inlet and outlet grating sizes
Make sure that the air inlet and outlets are large enough to allow sufficient air flow in and
out of the cabinet. This is critical for the correct cooling of the drive module. See the minimum
grating sizes below.
Minimum effective area of cabinet air
outlet (cm
2
)
Minimum effective area of cabinet air in-
let (cm
2
)
Frame size
IP54 IP22 IP54 IP22
550 350 250 175 R1
700 450 350 225 R2
900 550 450 275 R3
1100 700 550 350 R4
1250 800 650 400 R5
1500 950 750 475 R6
2000 1300 1100 650 R7
3200 2000 1600 1000 R8
4800 3000 2400 1500 R9
Preventing the recirculation of hot air
Prevent hot air circulation outside the cabinet by leading the outgoing hot air away from the
area where the inlet air to the cabinet is taken. Possible solutions are listed below:
• gratings that guide air flow at the air inlet and outlet
• air inlet and outlet at different sides of the cabinet
• cool air inlet in the lower part of the front door, and an extra exhaust fan on the roof of
the cabinet.
Prevent hot air circulation inside the cabinet with, for example, leak-proof air baffles. No
gaskets are usually required.
Guidelines for planning the cabinet installation 17