User's Manual

SBS-900 Shore Based Radar Systems
Chapter 9: Planned maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 109 of 240
5-year maintenance: Changing the static inverter in the RDU
Inspection sheet
3 of 6
Antenna motor connection
DO NOT CONNECT PL4
PL4 is the 3-Phase output to antenna motor.
The inverter must be configured BEFORE power is connected to the antenna.
Reconnect all cables to the inverter
Reconnect all other cables ensuring that they are replaced in the correct positions, polarity and/ or
marker numbers as noted when removing them earlier.
The inverter MUST now be commissioned as shown on the following pages.
Inverter control overview
After replacing the inverter and prior to applying AC power to the RDU/ inverter, engineers must
familiarise themselves with the inverter operation as shown below: