User's Manual

SBS
-
900 Shore
Ba
Ba
sed
Radar Systems
Chapter
9
:
Planned maintenance
KH
KH
-
1602 2
issue 1
:
Standard SBS900 Systems Operator & Maintenance Handbook
Page
102
of
240
5
-
year maintenance:
Changing the static inverter in the
RDU
Inspection sheet
2
of
6
Disconnect the power:
A
ll AC sources
including UPS supported supplies
must be FULLY isolated
and disconnected
from
the Radar Distribution Unit prior to commencing this
or any maintenance
task.
Disconnection:
Ensure
the system is fully disconnected from all
AC
power sources
Disconnect/ unplug PL4
: This is the 3
-
phase supply to the antenna motor and is located on the
base of the Radar Distribution Unit.
This must not be reconnected until the replacement inverter
ha
ha
s been configured
T
he screw terminals
within the
inverter c
a
n be
accessed by opening
the door of the inverter.
The main screw terminals are further
protected by a removable
safety
cover.
This is retained by plastic lugs
on each side and can
be gently
pulled
pulled
from the enclosure.
IMPORTANT: Prior to
disconnecting any cables make
a full note of the positions
/ pin
numbers
, polarity and cable
marker
s
of
ALL
cables
being
removed
The cable pin outs are
The cable pin outs are
not shown
in this document.
Having noted the cable loc
ations,
d
isconn
ect all cables from the
inverter.
Static i
nverter
within the RDU
open
ed.
T
erminal protection cover
fitted (left
) and removed (right)
Removal
and replacement
The inverter is mechanically retained
into the RDU chassis by 3 bolts as
shown.
Removed and retain these bolts (they
are required for refitting).
The inverter can now be removed
from the RDU.
The replacement inverter can now be
installed using the sam
e mounting
points and fasteners.
Reconnect
DO
DO
NOT
reconnect PL4 (3
phase supply to antenna motor).
Reconnect all
other
cables
ensuring that
the
y are replaced using the
positions, polarity and/ or
marker
numb
ers noted when removing them earlier.
The inverter will now need to be commissioned as shown on the following page.