User's Manual

SBS
-
900 Shore
Ba
Ba
sed
Radar Systems
Chapter
10
10
:
Corrective maintenance
KH
KH
-
1602 2
issue 1
:
Standard SBS900 Systems Operator & Maintenance Handbook
Page
181
of
240
Three
-
phase:
A separate
3
-
phase input
powers the antenna drive motor via
a
static inverter
located
within the Radar Distribution Unit.
The 3
phase input is
fed to
a static
inverter
via a set of user accessible
over current protection devices
in the
form of circuit
breakers and contactor relays.
10.8.3
Fuses
Safety I
-
loop fuse:
The
+24VDC supply to the Radar Distribution Unit
safety I
-
loop is protected by a
user accessible
fu
fu
se
se
located on the top of the RDU.
PSU backplane
The power sharing PCB mounted on the back of the power supply has three
fuse
holders
which serve different purposes depending on the system installed. The
PCB also contains four self
-
resetting thermal fuses
.
Power share PCB fitted to the 45
-
690
-
0080
-
001 power supply assembly
FS7
Used on
all
standard
SBS
-
900 systems to protect the main +
5V rail
.
FS5 & FS6
O
nly used in SBS
-
A1
A1
-
11 systems
to
to
independently p
rotect each +5V
rail
(FS7 is not fitted)
.
Fuse rating
s
Safety I
-
loop
F1
500mA 240VAC
,
Ceramic, time lag, 5 x 20mm.
Kelvin Hughes part number
45
45
650
0060
002
Power supply
F1
F1
+24VDC @ 3A
Self
-
resetting thermal fuses
.
Self
resetting thermal fuses cannot be replaced or manually reset. If a
fault conditi
on exists, switch the system OFF
and allow the thermal fuse
to reset.
F2
F2
+15VDC @ 1.85A
F3
F3
-
15VDC @ 0.9A
F4
F4
+5VDC @ 3A
FS5
10A 250V
, ceramic, time lag, 5 x 20mm.
Please contact Kelvin Hughes for the correct part number
FS6 & 7
15A 250V, c
eramic, time lag, 5 x 20mm.
Please contact Kelvin Hughes for the correct part number
Replacement fuses must be of the
exact
type
specified above.
PL
PL
1:
3
-
phase
input
Filter and
indicator
6.0
A
break
er
er
Contactor
Motor
inverter
Safety switch
Antenna RPM control
Motor ON/ OFF control
SK4:
3
-
phase
output to
a
ntenna motor
FS6
FS7
FS5