Specifications

Maxiva UAX
October 17, 2013
2‐3
888‐2693‐004 WARNING:Disconnectprimarypower priortoservicing.
Copyright©2013,HarrisBroadcast
ACdistributionchassisprovidesindividualcircuitbreakerprotectionforeachACinput.Ref ertotheWiringDiagram,
ACDistributionPanelsUAX(843‐5602‐104)formoredetail.
Transmitterstha
tshipwithoutarackmustbeequippedwithcustomerprovidedindividualcircuitbreakerprotection
foreachACinput.RefertoACFlowDiagram,NoACDistribution (843‐5602‐705)formoredetail.
Typically,t
ransmitterswithpowerlevelsbelow100WarefedwithsinglephaseAC.Transmitters250Wandgreater
areconfiguredfor3phaseoperations.ThefollowingACmainsconfigurationsareusablewhenappropriateexternal
wiringisprovided:
• Single‐phase208‐240V(L1+N,L1+N,L1+N)
• Single‐phase208‐240V(L1+L2,L1+L2,L1+L2)
• Three‐phase"delta",208‐240V(L1+L2),L2+L3,L3+L1)
• Three‐phase"wye",360V‐415V(L1+N,L2+N,L3+N)
Note
Since the three AC mains inputs are completely independent; it is not necessary to observe a certain phase
rotation or even phase balance. Additionally, the amplifier chassis can operate indefinitely (at a reduced
power) with one or two of the mains inputs missing. The internal power supplies connected to each input
will continue to operate provided that the incoming mains power at that input falls within the voltage
range indicated above.
Thetransmitterandinternalpowersupplymoduleshavebeencertifiedbyanaccreditedtestinglaboratoryfora
nominalACmainsvoltagerangeof100V‐240V(LPUchassis)or208V‐240V(2‐4PAPABchassis).Thiscertification
requirestestingtoanover‐andundervoltageallowanceof+/‐10%.Accordingly,therema
ybediscrepanciesin
certaindocumentsdependingonwhetherthecertifiednominalvoltagerange(e.g.240V)ormaximumtested
voltagerange(240V+10%=264V)isspecified.
Consultdr
awing839‐5602‐148OutlineDrawing,UAXTransmitters,forinformationconcerningsuggestedwiringand
fusingrequirements.
Warning
AN EXTERNAL CIRCUIT PROTECTION DEVICE (BREAKER OR FUSE) IS REQUIRED
FOR EACH LPU AND POWER AMPLIFIER AC INPUT. THIS IS PROVIDED BY THE
CUSTOMER IN ACCORDANCE WITH AC FLOW DIAGRAM OR BY HARRIS IF AN IN-
RACK AC DISTRIBUTION CHASSIS IS PURCHASED (OPTIONAL). IN THE LATTER
CASE, AN EXTERNAL CIRCUIT PROTECTION DEVICE TO COVER THE ENTIRE
TRANSMITTER LOAD AT THE MAIN AC DISTRIBUTION POINT IS STILL REQUIRED,
IN ACCORDANCE WITH PREVAILING LOCAL SAFETY NORMS.
Caution
WHEN THE TWO OR THREE SINGLE PHASE INPUTS TO THE TRANSMITTER
ARE DERIVED FROM A WYE (STAR) MAINS SERVICE, SPECIAL CARE MUST
BE PAID TO THE NEUTRAL CONNECTION, AS THE NEUTRAL CONNECTION
SERVES AS THE COMMON VOLTAGE REFERENCE TO ALL THREE PHASES.
SHOULD THE NEUTRAL CONNECTION BREAK, THE LINE-TO-LINE VOLTAGE
OF EACH PHASE WILL BECOME UNSTABLE AND INVARIABLY RESULT IN
SEVERE DAMAGE TO ALL LOADS FROM AN OVERVOLTAGE CONDITION.
ACCORDINGLY, ALL NEUTRAL CONNECTIONS SHOULD BE DOUBLE
CHECKED FOR INTEGRITY, ESPECIALLY WHEN MODULAR MAINS
DISONNECT PLUGS ARE IN USE. NEVER ALLOW THE NEUTRAL TO BE
BROKEN BEFORE THE INVIDUAL LINE CONNECTIONS. THIS
RECOMMENDATION HOLDS FOR ALL SINGLE-PHASE EQUIPMENT WITH A
WYE-DERIVED FEED, NOT JUST THE HARRIS UAX TRANSMITTER.