Reference Manual

Table Of Contents
Product Data
Fuses
The +24 V DC cables must be protected with an approved circuit
breaker/fuse.
Table 44 +24 V DC fuses recommendation
Minimum for Safe
Function
Maximum Allowed Fuse Rating
175 A 200 A
+24 V DC Cables
The +24 V DC supply is connected to the DC lter by a pair of
95 - 150 mm
2
cables, one for + and one for -.
5.3.3 -(48 - 60) V DC Power Supply
DC Power Requirements -(48 - 60) V
Table 45 DC power requirements
Nominal
-48/-60 V DC
Range
-(40.0 - 72.0) V DC
Non-destructive range
+0 - (-80) V DC
Inrush current, typical 200 A (0.1 - 0.5 ms)
Fuses
Table 46 -(48 - 60) V fuses recommendation
Fuse Rating for -60 V DC Fuse Rating for -48 V DC
32 A 40 A
-(48 - 60) V DC Cables
There are four power cables for the cabinet, one pair for each Power
Supply Unit. They are connected to the DCCU main switch with screw
terminals. The cables must be connected via an approved circuit
breaker/fuse for each cable.
The conductor area can be 6 10 mm
2
and cable diameter can be
4.5 7 mm.
EN/LZT 720 0008 R1A
2001-06-26
83 (421)
© Ericsson Radio Systems AB
All Rights Reserved