Nautel NX100, Installation Manual, Page: 27 / 66

NX100 Installation Manual Connecting ac power
Issue 3.2 2017-03-31 Page 5-1
Section 5: Connecting ac power
Connect ac power to the ac power disconnect switch and then to the transmitter, as follows:
1. Run the ac power cable from the ac power source to the ac power disconnect switch. The
preferred entry point is through the top of the ac power disconnect switch. Cabinet punches
or hole saws will be required to cut the entry holes for the conduits.
2. Open the ac power disconnect switch’s front door. Connect the ac line input from the power
source to the top
L1
(Line 1),
L2
(Line 2) and
L3
(Line 3) input terminals. Connect the ac
ground to the top ground terminal.
3. Connect the ac power disconnect switch’s load wiring to the bottom
T1
(Line 1),
T2
(Line 2)
and
T3
(Line 3) terminals. Connect the ac ground to the bottom ground terminal.
4. If applicable, connect
EMERGENCY STOP
switch wiring between the + and - terminals of
TB2, near the bottom of the ac power disconnect switch. This circuit must present a closed
contact between these terminals to allow ac power to be applied to the transmitter. In some
cases, Nautel may provide an
EMERGENCY STOP
switch. Close the ac power disconnect
switch’s front door.
5. Route the load wiring from the ac power disconnect switch to the transformer cabinet,
passing all the conductors, as a group, through a ferrite toroid (Nautel Part # LX63,
provided in the ancillary kit)..
6. Connect the ac power ground to the station reference ground.
7. Verify that the station reference ground and the transformer ground stud are connected to
the safety ground stud assembly at the back of the control cabinet.
DANGER: Ensure ac power is disconnected and locked out at the
source before proceeding.
WARNING: Ensure that wiring sizes are appropriate. ac wiring must be
installed by a qualified, locally-certified electrician.
Note:
The preferred entry point for ac input wiring is through a hole in the primary side
of the transformer cabinet. There is a cable tray wiring interface cover on the
primary side to connect to your cable tray system, as applicable. Temporarily
remove the cover to pass the primary wiring into the transformer cabinet.