GE LP 33 manual Automatic bypass operation, Mains recovery operation

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Automatic bypass operation

 

In VFI (Voltage Frequency Independent) operation

 

mode, the load is permanently supplied by the

 

inverter but, in case of trouble on the inverter, or

 

when overload or short-circuit on the output

 

occur, if the mains voltage do not exceed the

 

admitted tolerances, the load is instantly

 

transferred to the mains through the automatic

 

bypass, taking advantage of the higher short

 

circuit power.

Fig. 3.2-3 Energy flow in automatic bypass operation

When the inverter recovers, the load will be re-transferred automatically to the inverter.

In case of parallel system

Each unit has its own bypass.

All the bypasses in the system work together, their control being managed in the same manner by all units.

The units are continuously exchanging information before taking such decision. In case the inverter of one unit fails, its bypass remains operating.

It is excluded only if the unit is separated from the common bus by opening its output switch Q1.

Mains recovery operation

As soon as the mains recovers, the rectifier starts up automatically supplying the inverter and the battery-chargerrecharges the battery.

In case the inverter has been shut down following a complete discharge of the battery, when the mains recovers the system start up automatically.

Fig. 3.2-4 Energy flow at mains recovery operation

When the energy stored in the battery is sufficient to ensure a minimum time of operation with the actual load, in case of a future mains failure, the load will be retransferred to inverter (if selected VFI Mode).

In case of parallel system

When the AC input power recovers, the rectifiers will start up sequentially according to their number in the parallel system in order to avoid an initial inrush current.

The inverters will start up automatically, but only when the battery has recharged enough for a minimum runtime with the present load.

When enough inverters to supply the load have been restarted, the load will be transferred from the automatic bypass back to the inverter bus-bars.

Modifications reserved

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OPM_LPS_3UO_30K_40K_0US_V010.doc

Operating Manual LP 33 Series 30 & 40 kVA

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Contents LP 33 Series Manufactured byDate of issue 01/01/2005 File name ModelRevision Identification No Copyright 2005 by GE Consumer & IndustrialDear Customer Parallel version secured with RPA Table of contents Safety Rules Only ConditionGeneral Safety warnings Risk of electric shock PE Earth GND GroundIntroduction General DescriptionBlock Diagram and Main Elements Description DescriptionVFI Voltage Frequency Independent Mode operation Operation ModesThrough the automatic bypass Case of parallel systemMains recovery operation Automatic bypass operationManual bypass operation Mains failure operationWith redundant parallel system Parallel system for power capacity RPA Parallel SystemParallel system for redundancy UPS Paralleled on the Same Battery Pay attention to the following recommendationsService and Technical Support Riazzino CH Made in SwitzerlandRecycling AT the END of Service Life Layout Layout LP 33 Series / 30 & 40 kVASystem Handling Control PanelCommand Push Buttons and Switches Q1 UPS output switch Q2 Manual bypass switchDo not switch on Q1 and Q2 with Total offLCD Screen Application on UPSSW Version 2ms 2ms 5ms 10msAlarms list Code Alarm Meaning 41184130 4140Code Alarm Meaning 4520 45304531 4563Messages list Code Message Meaning 4362 44114500 4521Code Message Meaning 4602 46034699 4763Event report LP 33 Series LP 33 SeriesReset Total OFF Menu Screens MenuDate and time setup = Day = Month Modem enabled = N Init=BEQV1X3&D0S0=2User parameters screen Date and time set-upOperation mode selection VFI Mode or ECO Mode ECO Mode can only be activated on single unitsECO Mode Telephone numbers set-upExample 2 ECO Mode Stop before ECO Mode Start Example 3 ECO Mode during the night and week-endD1 ÷ d7 Enabling time in function of weekdays ECO Start ECO Stop Switch on the mains power at the input distribution panel OperationStart-up of the LP 33 Series Executing Mainboard Self TestSwitch On the output switch Q1 Pos Switch On the inverter entering the screenOperation mode selection Command MenuSwitch OFF the inverter by entering the screen Switch on the maintenance bypass Q2 PosUPS shutdown with load transfer on manual bypass Q2 Enter must be pressed 2 timesInverter U1= Switch OFF the maintenance bypass Q2 Pos Switch on the inverter by entering the screenStart-up following the operation on manual bypass Q2 TestComplete shutdown Udcp= Udcn= Ubp=0VCharge level Autonomy 0min Restore to normal operation after total off Restore the command total off by entering the screen= 0% LED TestRestore to normal operation after EPO Emergency Power Off Reset the UPS by entering the screenActivated Command Menu Inverter on Procedures for Parallel System LP 33 Series Parallel System start-up of the LP 33 SeriesSwitch on the output switch Q1 Pos. I on each unit 40kVA P1Udcp=215V Udcn=215V Switch on the maintenance bypass Q2 I on each unit = 70% LP 33 40kVA P1Switch OFF the inverter on each unit entering the screen Start-up following the operation on maintenance bypass Q2 Open the maintenance bypass switch Q2 Pos on each unitSwitch on the inverter on each unit entering the screen Udcp=215V Udcn=215V Ubp=164V Ubn=164V FShutdown of a single unit in a parallel system With purpose to separate one unit from the parallel systemU1= U2= U3= Frequency = 60.0Hz Synchronized Udcp= Udcn= Ubp=0VSwitch on the output switch Q1 Pos. I on this unit Switch on the inverter of this unit entering the screenStart-up an additional unit in a parallel system Executing MainboardComplete shutdown of a parallel system U2= U3= Frequency =Synchronized Udcp= Udcn= Ubp=0V Booster, inverter eand Static-Switch shutdown Reset total off of the parallel system40kVA P1 Reset all UPS by entering the screen Menu ComandiOptions Options General ViewMaintenance General MaintenanceCooling FAN Maintenance Battery MaintenanceService Required Service RequiredDate Description Done by SitePro / Digital EnergyTM SG Series UPS

LP 33 specifications

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