Ericsson MINI-LINK TN R3 ETSI Technical Description page 24

MINI-LINK TN R3 ETSI
PFU1 provides input low voltage protection, transient protection, soft start and
electronic fuse to limit surge currents at start-up, or overload currents during
short circuit.
A redundant PFU1 can be extracted or inserted without affecting the power
system.
3.2.3.2 Cooling
Forced air-cooling is provided by FAU1, fitted directly above the AMM. The air
enters through the cable shelf, flows directly past the plug-in units and exits at
the top of the AMM through the air guide plate.
If the indoor location has other fan units, which provide sufficient cooling
through the AMM, the FAU1 can be omitted. However, air filters should be
present in the cabinet door.
Complete rules for cooling are available in MINI-LINK TN ETSI Product
Specification and the Product Catalog.
Figure 22
18
Air Guide Plate
FAU1
AMM 20p
Cable Shelf
Air in
Side view of the airflow in AMM 20p
Air out
4/1555-CSH 109 32/1-V1 Uen B 2007-09-14
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