Zte ZXSDR R8978 - Page 24

ZXSDRR8978UserManual
If...Then...
IfvoltagedropoccursduetothedistancebetweentheZXSDRR8978
andtheindoorDCpowerlightingprotectionbox,apowercablewitha
largerdiametersizeisneededtoreducethevoltagedropcausedbylong
distancetransmission.Ajunctionboxisneededtoconvertthecablesto
adifferentsize.
TheindoorDCpowerdistributionunit(withapowerswitch)connectsto
thelightingprotectionboxoftheindoorDCpowersupply.
ConnectthejunctionboxtotheindoorDCpowerlightingprotection
box(thereareatotalofthreeoutputsintheindoorDCpowerlighting
protectionbox,eachofwhichhasanairswitchandcanbeconnected
toanRRU).
UsetheDCpowersupply
withajunctionbox
AftertheDCpowercableisconvertedbythejunctionbox,itcanbe
connectedtotheZXSDRR8978.
ThejunctionboxisnotrequiredbecausetheACpowersupplyislowwith
alargevoltageandvoltagedropcanbeignored.
ConnecttheindoorACpowerdistributioncabinettotheoutdoorAC
powerlighteningprotectionbox(thereareatotalofthreeoutputsinthe
indoorACpowerdistributioncabinet,eachofwhichhasapowerswitch
andcanbeconnectedtoanRRU).
UsetheACpowersupply
withoutajunctionbox
ConnecttheoutdoorACpowerlighteningprotectionboxtotheZXSDR
R8978.
Figure3-7illustratesthecableconnection.
3-8
SJ-20140808143736-001|2014-10-30(R1.1)ZTEProprietaryandCondential