Harris Atlas DVL400, Technical Manual

Page: 39 / 180

2/25/03 888-2473-001 2-9
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation / Initial Turn-On
ATLAS Series™
Figure 2-2 AC Connection to AC Disconnect Switch, S3
Verify that the Primary AC line voltage is correct for the installed MOV
board.
Measure the primary AC line voltage from phase to phase and write it in the
blank below. The transmitter was setup in the factory with a 380/400/415Vac Delta
or WYE 3 phase, or 220/240Vac single phase configured MOV board. Make sure
that the transmitter is setup for the same power configuration used at the site by
checking the factory test data sheet.
VAC
NOTE:
There must be less than a 5% imbalance between the phases to allow the
transmitter to operate.
Verify that the single phase step-down transformer is tapped correctly. This
step is not required on single phase transmitters.
Step-down transformer T1
reduces the 380/400/415Vac down to 220Vac for the transmitter low voltage power
supplies, fans and exciters. Using the voltage measured above, check the primary
tapping of T1. TB4 is used to re-tap the transformer if necessary, by moving wire
#58. Figure 2-3 shows a chart of the 3 possible tap positions. The transformer is
located in the bottom rear section of the PA cabinet.
Figure 2-3 Tapping Stepdown Transformer, T1, using TB4
Safety Ground Connection
E10
Primary Line
Voltage
380Vac
400Vac
415Vac
Wire #58 TAP
on TB4
Terminal 5
Terminal 4
Terminal 3
Also shown on
843-5550-004
Wiring Diagram