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5.9 Isolating power to systems
TM
display:
MANTADIGITAL
The display can be switch OFF as described in section 5.8 however this does not isolate the
system from the mains supply or isolate the interswitch, transmitters, gearboxes and
associated sub systems.
The display must be isolated at the appropriate mains breaker before opening the processor
or attempting any maintenance procedures.
TM
processor:
MANTADIGITAL
The processor can be switch OFF using the ON/ OFF switch located on the front of the
processor however; this does not isolate the system from the mains supply or isolate the
interswitch, transmitters, gearboxes and associated sub systems.
The processor must be isolated at the appropriate mains breaker before opening the
processor or attempting any maintenance procedures.
Radar Interswitch Unit (RIU):
The RIU is fitted with an illuminated mains switch which is located on the base of the unit.
This switch turns the RIU OFF but does not switch OFF transmitter systems or isolate the
RIU from the mains supply. When switched OFF, the RIU enters Bypass mode
Note: See the operator handbook HBK-4001 part 1 for additional details on Bypass mode.
The RIU must be isolated at the appropriate mains breaker before opening the unit or
attempting any maintenance procedures.
X-band transmitter system:
MK4 & MK7 series: Transmitters and gearboxes do not have built in power isolators.
Power to the transceiver and any associated sub systems must be isolated at the
appropriate mains breaker before working aloft or attempting any maintenance procedures.
MK5 series: The MK5 upmast transmitter is run through the transmitter interface unit (TIU).
The TIU is fitted with mains switch which is located on the top of the unit. This switch turns
the TIU and MKV transmitter OFF but does not fully isolate the unit for the mains supply.
The TIU must be isolated at the appropriate mains breaker before opening the unit,
attempting any maintenance procedures or working aloft on the MKV transmitter system.
S-Band transmitters systems:
S-Band gearboxes are partially powered from a Drive Control unit that is fitted with a
keyswitch. When in the OFF position, this keyswitch isolates the 3-phase power to the
gearbox but DOES NOT isolate the 2-phase AC mains supply to upmast transceivers.
The S-Band transmitter system must be fully isolated from both the AC mains supply and the
3-phase supplies at the appropriate mains breaker before opening the unit, attempting any
maintenance procedures or working aloft.
Kelvin Hughes
MANTADIGITAL
Go to Run ...
5
Chapter
:
HBK-4002, issue 2 February 2013
Page 26 of 26
TM
Quick Start Guide:
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