Nautel FM10, Technical Instructions, Page: 36 / 200

10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 2-10
01 October 2002
NOTE
It is recommended a six-foot long 2 x 4 board be
used, in conjunction with the lifting bracket mounted
on top of the power supply, as an aid in lifting the
power supply into the transmitter.
(m) Temporarily remove P33 from J1 of power
supply module A9 in the front of the
transmitter, noting it prevents access to the
power supply's lifting bracket when connected.
(n) Using extreme care to avoid damage to wiring
and/or assemblies, place the power supply in
the transmitter and align its base with the
mounting holes on the bottom of the cabinet
(the transformer's primary terminals should be
facing the rear).
NOTE
Since the wires located in step (h) are difficult to
access, it may be necessary to connect them to the
appropriate terminals of the power transformer (see
table 2-1) before aligning the power transformer
with the cabinet's mounting holes.
(o) Secure the power transformer to the cabinet
using the four 3/8-16 x 1 bolts and associated
flat and split washers removed in step (l).
(p) Connect the wiring located in steps (d) thru (h)
to the appropriate terminals of the power
transformer (A1T1) as identified in table 2-1.
(q) Plug connector P15, located in step (i), into J1
of the power supply.
(r) Plug connector P33, removed in step (m), into
J1 of switching power supply A9 in the front of
the transmitter.
(s) Replace the power supply air blocker using the
hardware retained in step (c).
Do not operate the transmitter with the power
supply air blocker removed.
Table 2-1 Power Transformer Wire Connections
A1 WIRE WIRE WIRE SOURCE
TERM # SIZE COLOUR
T1-H1 305 2 BLK A4CB1A-LOAD
T1-H2 306 2 BLK A4CB1B-LOAD
T1-H3 307 2 BLK A4CB1C-LOAD
T1-X1 308 6 BLK A2A1U1-AC
T1-X2 309 6 BLK A2A1U2-AC
T1-X3 310 6 BLK A2A1U3-AC
T1-Y1 311 6 BLK A3A1U1-AC
T1-Y2 312 6 BLK A3A1U2-AC
T1-Y3 313 6 BLK A3A1U3-AC
L1-2 314 2 BLK A2A1 (+)
L2-1 315 2 BLK A3A1 (+)
L1-1 318 2 BLK A4E1
L2-2 319 2 BLK A4E2
T1-Gnd - 2 BLK Ground
(t) Do not install the lower, rear panel at this time.
Access to the TB1 in the power supply
compartment is required when installing the ac
power source wiring as detailed in paragraph
2.2.6.
NOTE
The lower, rear panel, when it is installed, prevents
unintentional access to the power supply
compartment, which contains exposed ac voltages.
If the correct primary winding tap connections for
the power transformer have not been chosen in step
(p), the panel will also have to be removed during
the technical pre-commissioning procedures
described in the transmitter's technical manual.
2.2.6 INSTALLATION OF AC POWER
SOURCE WIRING: Connect the wiring from the
AC power source to the appropriate terminals of
terminal block TB1, noting it is located at the lower,
rear, left-hand side of the cabinet.
(a) Verify a suitable cable entry hole (punched in
the top or existing in the bottom) is available
for the ac power source wiring at the desired
cable entry point.