2-22 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Maxiva ULX COFDM Series
2.6.2 AC Connections Procedure
!
CAUTION:
WHEN CONNECTED TO A 380-415VAC 3 PHASE WYE POWER CONFIGURATION,
NEUTRAL CURRENT CAN BE EQUAL TO OR EXCEED PHASE CURRENTS DUE TO
SWITCH MODE POWER SUPPLY HARMONICS. FINAL INSTALLATION SHALL
ENSURE NEUTRAL CONDUCTOR IS PROPERLY SIZED AND THAT ALL LOCAL
REGULATIONS ARE MET.
NOTE:
It is important that the correct voltage, frequency and connection type be speci-
fied as the MOV protection board jumpers, IPA backplane jumpers, and PA back-
plane jumpers are configured different for delta or wye voltage configurations.
STEP 1 Route the Primary AC conduit through clamps at the top of the
transmitter cabinet.
The top of the transmitter cabinet has pre-cut holes for clamps to secure
conduit to the cabinet as shown in the Outline Drawing.
NOTE:
For the following two steps the access cover at the top of the transmitter and the
panel surrounding the circuit breakers in the top rear of the transmitter should be
removed to facilitate connection of the AC mains to the transmitter.
STEP 2 Connect the AC wires to the primary AC terminal blocks CB23 and
CB24 (for higher power levels two AC inputs are required). Refer to the
wiring diagram for details on specific power levels. The AC input wires
will connect to CB23 and CB24 located behind the access plate on top
rear of the cabinet (another panel on the top of the transmitter see Figure
2-9, below must be removed for access). It will be necessary to use a
straight slot screw driver to loosen the circuit breaker screws to allow
insertion of the cable. Once the cable is in place tighten the screws to
secure the cables firmly in place.
!
CAUTION:
BE CERTAIN THAT THE INSULATION ON EACH AC SUPPLY CABLE HAS BEEN
SUFFICIENTLY CUT BACK TO ALLOW FULL CONTACT BETWEEN THE
CONNECTOR BLOCK AND THE COPPER CABLE. FAILURE TO REMOVE THE
INSULATION MAY RESULT IN HEATING AND FAILURE OF THE CONNECTION.
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