GE LP 33 manual Operation Modes, VFI Voltage Frequency Independent Mode operation

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3.2OPERATION MODES

This section describes the different possible operation modes of the UPS explaining the function of the main modules of the UPS.

VFI (Voltage Frequency Independent) Mode operation

Under normal conditions the load is permanently powered by the inverter with constant amplitude and frequency.

The rectifier, powered by the mains, supplies the inverter and the battery-chargerkeeps the battery fully charged.

Fig. 3.2-1 Energy flow in VFI Mode operation

The inverter converts the DC voltage in a new AC sine wave voltage with constant amplitude and frequency independently from the input mains power.

ECO Mode operation (Intelligent Energy Management)

 

When the ECO Mode is selected, and the mains

 

power is available, the load is normally powered

 

through the automatic bypass.

 

When the mains voltage is detected out of the

 

prescribed tolerances, the load is automatically

 

transferred to the inverter.

 

When the mains recovers, the load returns to

 

the automatic bypass after a variable time

Fig. 3.2-2 Energy flow in ECO Mode operation

defined by the control unit.

 

The ECO Mode can be configured directly by the user for higher efficiency, considering the mains reliability and criticality of the load.

The selection between the two operation modes “VFI Mode and ECO Mode”, or switching between operation modes at required time, can be done through the UPS control panel (see Section 6.3.1-5).

 

In case of parallel system

ECO Mode cannot be enabled for RPA Parallel System.

Attention:

A single unit equipped with a RPA - Parallel board, must be considered as parallel, thus

 

disabling ECO Mode.

 

 

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 Manufactured by LP 33 SeriesCopyright 2005 by GE Consumer & Industrial Date of issue 01/01/2005 File nameModel Revision Identification NoDear Customer Parallel version secured with RPA Table of contents Only Condition Safety RulesGeneral Risk of electric shock PE Earth GND Ground Safety warningsGeneral Description IntroductionDescription Block Diagram and Main Elements DescriptionCase of parallel system VFI Voltage Frequency Independent Mode operationOperation Modes Through the automatic bypassAutomatic bypass operation Mains recovery operationWith redundant parallel system Manual bypass operationMains failure operation Parallel system for redundancy Parallel system for power capacityRPA Parallel System Pay attention to the following recommendations UPS Paralleled on the Same BatteryRiazzino CH Made in Switzerland Service and Technical SupportRecycling AT the END of Service Life Layout LP 33 Series / 30 & 40 kVA LayoutControl Panel System HandlingTotal off Command Push Buttons and SwitchesQ1 UPS output switch Q2 Manual bypass switch Do not switch on Q1 and Q2 withApplication on UPS LCD Screen2ms 2ms 5ms 10ms SW VersionAlarms list 4140 Code Alarm Meaning4118 41304563 Code Alarm Meaning 45204530 4531Messages list 4521 Code Message Meaning 43624411 45004763 Code Message Meaning 46024603 4699LP 33 Series Event report LP 33 SeriesMenu Screens Menu Reset Total OFFDate and time set-up Date and time setup = Day = MonthModem enabled = N Init=BEQV1X3&D0S0=2 User parameters screenTelephone numbers set-up Operation mode selection VFI Mode or ECO ModeECO Mode can only be activated on single units ECO ModeD1 ÷ d7 Enabling time in function of weekdays Example 2 ECO Mode Stop before ECO Mode StartExample 3 ECO Mode during the night and week-end ECO Start ECO Stop Executing Mainboard Self Test Switch on the mains power at the input distribution panelOperation Start-up of the LP 33 SeriesCommand Menu Switch On the output switch Q1 PosSwitch On the inverter entering the screen Operation mode selectionEnter must be pressed 2 times Switch OFF the inverter by entering the screenSwitch on the maintenance bypass Q2 Pos UPS shutdown with load transfer on manual bypass Q2Inverter U1= Test Switch OFF the maintenance bypass Q2 PosSwitch on the inverter by entering the screen Start-up following the operation on manual bypass Q2Charge level Autonomy 0min Complete shutdownUdcp= Udcn= Ubp=0V LED Test Restore to normal operation after total offRestore the command total off by entering the screen = 0%Activated Command Menu Inverter on Restore to normal operation after EPO Emergency Power OffReset the UPS by entering the screen Parallel System start-up of the LP 33 Series Procedures for Parallel System LP 33 SeriesUdcp=215V Udcn=215V Switch on the output switch Q1 Pos. I on each unit40kVA P1 = 70% LP 33 40kVA P1 Switch on the maintenance bypass Q2 I on each unitSwitch OFF the inverter on each unit entering the screen Udcp=215V Udcn=215V Ubp=164V Ubn=164V F Start-up following the operation on maintenance bypass Q2Open the maintenance bypass switch Q2 Pos on each unit Switch on the inverter on each unit entering the screenU2= U3= Frequency = 60.0Hz Synchronized Udcp= Udcn= Ubp=0V Shutdown of a single unit in a parallel systemWith purpose to separate one unit from the parallel system U1=Executing Mainboard Switch on the output switch Q1 Pos. I on this unitSwitch on the inverter of this unit entering the screen Start-up an additional unit in a parallel systemSynchronized Udcp= Udcn= Ubp=0V Complete shutdown of a parallel systemU2= U3= Frequency = 40kVA P1 Booster, inverter eand Static-Switch shutdownReset total off of the parallel system Menu Comandi Reset all UPS by entering the screenOptions General View OptionsBattery Maintenance MaintenanceGeneral Maintenance Cooling FAN MaintenanceService Required Service RequiredDate Description Done by SitePro / Digital EnergyTM SG Series UPS

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