EnerSys Alpha Cordex CXC HP - Maintenance Bypass; Taking Power from DC Source

Cordex®CXCHPControllerSoftwareManual|19-Maintainingthesystem
Change the system configuration
Oncethesystemhasbeencreated,mostofthesystemconfigurationcannotbechanged.Thenumberof
phases,numberofDCgroups,andnumberofACgroupscannotbechanged.Ifanyofthesevaluesare
incorrecttheinvertersystemmustbere-commissionedandallinvertersunplugged.
Add or remove inverters
Ifmoreinvertersareneededtoincreasecapacity,theAdd Inverters wizardguidesusersthroughthis
process.
Important: To ensure the T2S system is configured correctly, it is necessary to use these wizards
to add or remove inverters from the system. This ensures that the correct number of inverters,
and the correct number of redundant modules in each phase. This is important for the operation
of T2S system alerts and alarms.
GotoSystems > Inverter System > Inventory > Inverters > Status toaccesstheAdd Inverters
wizard.
Ifinvertersmustberemovedfromthesystem,usetheRemove Inverters wizard.GotoSystems >
Inverter System > Inventory > Inverters > Status toaccesstheRemove Inverters wizard.
19.2.1. Maintenance bypass
ForsystemconfigurationsthatuseageneratorfortheACinput,thesafestwaytoinitiateamaintenance
bypassistofollowtheinstructionsintheInitiate Zero Phase Shift wizard.Thiswizardshouldbeused
whenevertheinvertersystemhastobeputintoortakenoutofbypass.Thispreventstheinvertersfrom
turningoffwhenthebypassswitchbrieflyshort-circuitstheACinputandoutput.
GotoSystems > Inverter System > System Functions > Zero Phase Shift toaccesstheInitiate Zero
Phase Shift wizard.
ThewizardshiftsthephaseandvoltageoftheACoutputtomatchtheinput.
19.2.2. Taking power from DC source
TheinvertersystemcantakepowerfromtheDCsource(usuallybatteries)underthreeconditions:
1.
ACmainsislost;
2.
ManualDCpriorityisenabled;
3.
Inputpowerlimitisenabled.
WhenACmainsislost,theinverterswillalwaystakepowerfromtheDCsourceifavailable.
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