Broadcast Electronics AM-2.5E, User Manual

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2-22
WARNING
WARNING
ENSURE PRIMARY POWER IS DISCONNECTED BE
FORE PROCEEDING.
WARNING
WARNING
ENSURE AN EARTH GROUND CONDUCTOR IS SE
CURELY CONNECTED TO THE TRANSMITTER AC
GROUND LUG.
2-92.
AC POWER CONNECTIONS.
The AM-2.5E transmitter requires a single-phase source
of 196V to 252V ac, 50 Hz or 60 Hz at 75 Amperes. The AM-5E transmitter requires a
single-phase source of 196V to 252V ac, 50 Hz or 60 Hz at 125 amperes. For operating
safety, the power source must be routed to the transmitter through a fused power discon
nect (refer to Figures 2-10 and 2-11).
WARNING
WARNING
ENSURE PRIMARY POWER IS DISCONNECTED BE
FORE PROCEEDING.
2-93. Main ac Input -AM-2.5E. Refer to Figure 2-10 and connect the 75 Ampere service to ac
input/control device S1 through a fused service disconnect as shown. Ensure a utility com
pany ground conductor is securely connected to the transmitter common ground system
and the ac service ground wire is securely connected to the ac ground lug as shown.
2-94. Main ac Input - AM-5E. Refer to Figure 2-11 and connect the 125 ampere service to ac
input/control device S1 through a fused service disconnect as shown. Ensure a utility com
pany ground conductor is securely connected to the transmitter common ground system
and the ac service ground wire is securely connected to the ac ground lug as shown.
WARNING
WARNING
ENSURE PRIMARY POWER IS DISCONNECTED BE
FORE PROCEEDING.
WARNING
WARNING
ENSURE AN EARTH GROUND CONDUCTOR IS SE
CURELY CONNECTED TO THE TRANSMITTER
GROUND LUG.
2-95.
GROUND.
The transmitter is equipped with a cabinet ground system for operating safety.
The ground system requires the connection of an earth ground. Refer to Figures 2-10 and
2-11 and connect an earth ground to the cabinet ground lug as shown using a 2 inch (5.08
cm) wide copper strap.
2-96.
TRANSMITTER SITE LIGHTNING PROTECTION SYSTEM CHECKOUT.
CAUTION
CAUTION
THE TRANSMITTER SITE LIGHTNING PROTECTION
SYSTEM MUST BE INSPECTED AND IN PROPER
WORKING CONDITION FOR RELIABLE TRANSMIT
TER OPERATION.
2-97. For reliable transmitter operation, the transmitter site lightning protection system must
be inspected and in proper working condition. Due to the solid-state design of the trans
mitter, high voltage potentials from lightning activity can cause severe damage to the
transmitter circuitry. Therefore, perform the following procedures to inspect and improve
the lightning protection system at the transmitter site. Refer to the NAB Radio Handbook
for additional transmitter site lightning protection system information.