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User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V User Manual – Hipulse Installation & Maintenance of Hipulse 130 kVA Single phase 110V , Single & 1 + N System.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V Dear Customer, Please accept our thanks for giving us the privilege to serve you by choosing a Liebert make ‘UPS’. If this is your f irst Liebert UPS, we hope it is the beginning of a long relationship which delivers value to your organisation.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V Rev. No. Revision details Date IMPORTANT This manual contains information concerning the installation, operation and maintenance of the Hipulse Uninterruptible Pow er System (UPS) for the single module and one plus one Systems.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V REGISTERED HEAD OFFICE Emerson Network Power (India) Private Limited PLOT NO. C - 20, ROAD NO.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V *** EAST ZONE *** Kolkatta Address: Jindal Towers, 21/1A/3, Darga Road, Kolkata - 700 017 Tel: 91 - 33 - 2289 0493 / 033 2289 049.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V Safety Procedure WARNING In a domestic environment, this product may cause radio interface in which cas e the user may be required to take additional measures. WARNING HIGH EARTH LEAKAGE CURRENT: EARTH CONNECTIONS IS ESSENTIAL BEFORE CONNECTING THE INPUT SUPPLY.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V GENERAL As with other types o f high power equipment, dangerous voltages are present within the UPS and battery enclosure. The risk of contact with these is minimised as the live component parts are housed behind a hinged, lockable door.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 1 General Introduction 1 1.1 Introduction 1 1.2 Design Concept 1 1.2.1 Hipulse Module Design 1 1.2.2 Bypass Supplies 2 1.2.3 System control Philosophy 3 1.2.4 ECOMODE (for single UPS) 4 1.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 5 Operating Instructions 31 5.1 Introduction 31 5.1.1 General Notes 31 5.1.2 Power switches 31 5.2 Procedure for UPS Startup: without interrupting 32 power to the load 5.3 Procedure for UPS Startup: without powe r initially 34 supplied to the load 5.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 7 Display Panel Interpretation 55 7.1 LED Interpretation 55 7.2 Display Panel Messages 57 8 1 + N System 6 3 8.1 Ge neral 63 8.2 Installation Procedure 65 8.2.1 Preliminary Checks 65 8.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 1 CHAPTER 1 General Description 1.1 Introduction The Hipulse Uninterruptible Power Supply (UPS) System is connected between a critical load, such as a computer, and its t hree phase mains power supply.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 2 During normal operation both the rectifier and inverter sections are active and provide regulated loa d power whilst simultaneously float charging the battery.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 3 1.2.3 System Control Philosophy Normal Operation During normal operation, i.e.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 4 Overload In the event of an overload at the Inverter output which lasts longer than the typical time/ current (refer to Chapter.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 5 WARNING In ECOMODE the load is not protected against mains distortion. 1.2.5 UPS Power Switch Configurat ion Figure 1 - 2 illustrates the Hipulse UPS module in what is known as the "Split Bypass" configuration.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 6.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 7 CHAPTER 2 Installa tion Procedure 2.1 Introduction WARNING Do not apply electrical power to the UPS equipment before the arrival of the commissioning engineer.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 8 2.2 Environmental considerations 2.2.1 UPS location The UPS module should be located in a cool, dry, clean - air environment with adequate vent ilation to keep the ambient temperature within the specified operating range (see Chapter 9 - Specifications).
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 9 2.3 Mechanical Considerations 2.3.1 System composition A UPS system can comprise a number of equipment cabinets, depending on the individual system design requirements - e.g. UPS cabinet, Battery cabinet.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 10 2.4 Preliminary Checks Before you install the UPS hardware you should carry out the following preliminary checks: 1.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 11 1903 1600 1750 4 5 1 LEFT SIDE VIEW FRONT VIEW REA R VIEW TOP VIEW Note - All dimensions are in mm 1. Rem ovable g r i l l fo r l ifti ng w ith fork - li f t truck 2. Air i nle t g ri ll 3.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 12 A. CABLE ENTRY DETAILS FOUNDATION DETAILS Note: All dimensions are in mm Fig 2 - 2 : Cable entry and Foundation details for 130 kVA Single Phase UPS 125 570 90 800 1400 65 570 90 40 1220 660 1315 755 Dia 14.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 13 CHAPTER 3 Inst allation (Electrical) The UPS requires both “Power” and “Control” cabling once it has been mechanically installed.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 14 3.1.2 Cable rating NOMINAL CURRENT (Amps) 3 Phase Input Mains with full battery re - charge (less 5% for 12 pulse) 1 Phase Output at full load Battery at minimum Battery Voltage UPS Rating (kVA) 380V 400V 415V 110V 115V 120V 380V 400V 415V 30 63 60 58 272 260 250 83 80 77.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 15 WARNING Failure to follow adequate earthing procedures can result in electric shock hazard to personnel, or the risk of f ire, should an earth fault occur.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 16 Parallel 1+N: Use of differential circuit breakers on UPS unit inputs in a configuration with separate inputs and one battery for each unit requires installation of a common device only on the System Bypass Mains.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 17 WARNING If the load equipment will not be ready to accept power on the arrival of the commissioning engineer then en sure that the system output cables are safely isolated at their ends.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 18 Fig 3 - 1 : Cable connections for 130 kVA 1Ph UPS U1 V1 W1 +VE - VE U3 N3 U2 N2 Q1 Q2 Q4 Q3 X4 X3 Q1 - INPUT SUPPLY Q2 - BY PA.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 19 3.2 Cont rol cables 3.2.1 Battery Control The battery circuit breaker is controlled by the Battery Circuit Breaker Controller Board which is located within the Input Transformer Cubicle - or adjacent to the Battery Circuit Breaker when the batteries are rack - mount ed.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 20 3.2.2 Auxiliary Terminal Block X3 and X4 at UPS X3 terminal reference Reference label Description 2 Common Temperature sensor common (0V) 3 T Batt. Temperature sensor s ignal 4 Common Common (0V) 5 Batt.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 21 3.2.3 Emergency Stop If an external Emergency Stop facility is required it is connected to terminals 5 & 6 of the Auxiliary Terminal Block (X4) and connect the ‘normally closed’ remote stop switch between these two terminals using shielded cable.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 22.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 23 CHAPTER 4 Operator Control and Display Panel 4.1 Introduction On the front of the UPS there is a display and control panel, from which it is possible to easily verify the status of the UPS included all the meas ured parameters and alarms of the UPS and Battery.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 24 4.1.1 Operator control panel The control and display panel LEd indications are illustrated in figure 4 - 2 and described in th.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 25 Menu Control switches Four push button switches ESCape[9], DOWN [10], UP [11], ENTER [12], are located below the LCD display and are used to navigate a menu - driven UPS operating and control system.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 26 Pressing the ENTER button [12] from the Default Screen gives the operator access to t he ‘Measurements’ menu which facilit.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 27 20. Emergency Stop - housed beneath a safety cover to prevent inadvertent operation. When the emergency stop switch is pressed it di sables the static switch block entirely (so removing load power).
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 28 Fig 4 - 4: Map of screen display available to operator NORMAL O PERATI ON 11:15.50 01 . 02.98 NORMAL O PERATI ON 11:15.50 01 . 02.98 >MEASURE MENT < FUNCTION MAINTEN ANCE SETUP >MEASURE MENT < FUNCTION MAINTEN ANCE SETUP RECTIF.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 29 LCD Display Panel Messages Initializing Window After first connecting power to the UPS and closing the bypass A.C. input power switch, the INITIALIZATION message will appear on the LCD screen.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 30 The FUNCTION, MAINTENANCE and SETUP options all require a password w hich is set by the commissioning engineer. This manual does not provide servicing instructions and the options accessed from theses windows are therefore not shown on the menu map in figure 4 - 4.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 31 CHAPTER 5 Operating Instructions 5.1 Introduction The UPS can be considered to be in one of three operating conditions: Normal operation All relevant power switches and circuit breakers closed, the load i s powered by the UPS.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 32 5.2 Procedure for UPS Star t - up: without interrupting power to the load This procedure will describe how to start the UPS and the how to transfer the load from the external maintenance bypass to the UPS inverter.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 33 The Display window will show the present status of the UPS 3. Close the Rectifier input power switch Q1. Note: In ECOMODE the messa ge 'LOAD ON BYPASS' will not appear.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 34 5.3 Procedure for UPS Startup without power initially supplied to the load This procedure should be followed when turning on the UPS from fully powered down condition i.e. where the load is not being initially supplied at all.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 35 Select MEASUREMENT and press ENTER key. Select BATTERY and d.c. busbar voltage will be displayed: If the voltage indicated is satisfactory (432V d.c. for 380V a.c. system, 446VV d.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 36 5.4 Procedure for Switching the UPS into a Maintenance Bypass condition from normal operation The first part of this procedure details how to select the Inverter OFF and power the load from the bypass mains via the Static Switch.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 37 At this point the UPS inverter stops but the load continues to be supplied by the bypass mains. The Load on Mains indicator light (6) on the unit's synoptic panel flashes yellow, and the Load on Inverter indicator light (5) goes off.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 38 5.5 Procedure for Switching the UPS ON from a Maintenance Power condition. Follow the procedure for 'UPS startup: without interrupting power to the load' referring to the paragraph 5 .
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 39 WARNING Wait 5 minutes for the internal D.C. busbar capacitors to discharge. The UPS is now completely p owered down.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 40 Select NEXT PAGE and press ENTER key. Press the ENTER key. Select RESET ALARMS and press ENTER key. Return the Display window to normal by repea tedly pressing the ESCAPE key back through the various windows until the default screen is displayed.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 41 5.9 Procedure to completely switch ON/ OFF the UPS at the UPS Display Control Panel: 1.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 42 The OFF selection will be highlighted, using the UP arrow key, rotate between the selecti ons offered (in this case it will be ON or OFF) select ON. Press the ENTER key to execute your order.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 43 5.10 Procedure to switch ON/OFF the inverter at UPS display control panel CAUTION This operation gives the operator access to modify UPS’’s operating mode, it is advised that only traine d qualified personnel should attempt to do that.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 44 5.11 Setting the Battery Test A software - controlled battery facility c an be initiated from the Operator control Panel on an ‘immediate’ or ‘periodic’ basis.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 45 5.12 Language Selection : If required, select the appropriate language using the following procedure. From ‘Default’ window, press ENTER key. Se lect the FUNCTION and press the enter key.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 46.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 47 CHAPTER 6 Battery Installation 6.1 Introduction The UPS battery consists of battery blocks connected in series to provide a nominal d.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 48 The following general battery safety precautions and WARINGS should be observed all the time. CAUTION • A battery can present risk of electric shock or burn from high short circuit currents.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 49 6.4 Installation design considerations Note: F ull safety instructions concerning the use and maintenance of UPS batteries are provided in the appropriate battery manufacturers’ manuals.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 50 6.6 Battery protectio n The battery is connected to the UPS through a circuit breaker which is manually closed and electronically tripped via the UPS control circuitry.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 51 The battery cabinet also indicates the power and auxiliary connection cables (3 meters in length) between the cabinet and the UPS. Refer to section 3.3.1 to identify connections.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 52 6.8 Battery Installation Whatever the type of mounting system selected, following conditions should be noted: Layout of the ce.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 53 Figure 6 - 3: Battery Control and Power Connections A – Half potential switching method B – Double positive pole method 3 .
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 54 6.10 Battery temperature Board A battery / sensor card supplied separately from the battery circui t breaker is connected with the UPS logic through the battery circuit breaker card.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 55 CHAPTER 7 Display Panel Interpretation 7.1 LED Interpretation: The LED item number refers to details shown in the figure 7.1 below. LED N0. NORMAL STATE INTERPRETATIO N – ACTION 1.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 56 1. If [OVERTEM PERATURE] or [OVERLOAD] alarm messages are active then (after allowing the UPS to cool / checking that the load current on the Bypass line is not excessive) use the procedure to carry out the reset (see Chapter 5 – Operating Instructions).
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 57 7.2 Display Panel Messages The message displayed on Hipulse can be categorized into types: - (a) ALARM messages - these are me.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 58 overload present. 7. OVERLOAD SHUTDOWN This message informs the operator that the load has been transferred to bypass due to an inverter overload. 8. OUTPUT SWITCH OPEN This is a statu s alarm.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 59 14. BATTERY: E.O.D. Battery discharge has continued beyond a preset value. The inverter will shut down, the system will attem pt a transfer to bypass. If Bypass is not available, any load connected to the UPS will be without power.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 60 22. BATT ERY ON LOAD This is a status warning that the battery is discharging.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 61 30. BYP: XFER COUNT BLOCK This message informs the operator that the load has been transferred to the bypass more than eight times in one minute. After eight transfers the load will remain on bypass.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 62.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 63 Chapter 8 1 + N System 8.1 General The system can comprise of up to 6 UPS mo dules of the same power rating and connected in parallel without the need for a centralized mains static bypass.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 64 Fig 8 - 1: '1+N' System block diagram with Separate Batteries RECTI FIER STATIC SWITCH INVER TER UPS 1 Output Supply Battery C .
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 65 8.2 Installation procedure 8.2.1 Preliminary Checks Be sure that a parallel kit is present and fitted in each of the modules, and that the modules are of the same rating and with the same software and hardware release (see section 4.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 66 8.2.5 Battery Control The system is designed to operate with separate battery configuration.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 67 8.3 Operating Instruction Starting and stopping the ‘1+N’ system is the same as a single module, however the module’s response depends on whether it is configured on the menu of the Operator Control Panel.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 68 3. Close the Rectifier input power switch Q1 and UPS output power switch Q4. After approximately 20 seconds the Module Mimic led’s will change so that the Load on inverter will light (5 - steady green) and the Load on bypass (6) will extinguish.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 69 8.3.1.2 Switching the sy stem to maintenance bypass from normal operation WARNING The internal maintenance bypass must not be used when the UPS system is comprised of more than two UPS modules in parallel.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 70 8.3.1.5 Switching ON a UPS that was previously switched OFF and isolated from the system. 1. Close the circuit - breakers relative to the shutdown UPS that were previously opened on the power distribution switchboard.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 71 Chapter 9 Specification This specification describe requirements for an Uninterruptible Power System (UPS). 9.1 Conformity and Standard The UPS has been designed to conform the following standards: IEC, EN 9.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 72 9.4 UPS Electrical Characteristics R E C T I F I E R I N P U T M A I N S I/P Ratings Units 130 kVA 6 pulse Rated power kVA 130.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 73 9.5 UPS Electrical Characteristics (DC Intermediate Circuit) D. C. I N T E R M E D I A T E C I R C U I T Rated Power kVA 130 Voltage range for Inver ter operation Vdc 340 – 480 Recommended number of - Lead - acid cells j - k - Ni - Cd cells j - k Nos.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 74 9.6 UPS Electrical Characteristics (Inverter Output) I N V E R T E R O U T P U T Rated Power kVA 130 Rated mains voltage j Vac 380 - 400 - 415 Three phase with neutral Frequency k Hz 50 to 60 Rated Power at cos φ = 0.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 75 9.7 UPS Electrical Characteristics (Bypass Input Mains) B Y P A S S I N P U T M A I N S Rated Power kVA 130 Rated mains voltag.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 76.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 77.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 78.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 79 10.1 Remote Alarm Monitor The Remote Alarm Monitor (RAM) Board can be used in conjunction with the AS400 Alarms Interface Board to disp lay the UPS alarm and status information at a remote station to 100 meters from the UPS.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 80 Figure 10.1: Remote Alarm Monitor connection details # 100201120003 Bypass Failure Low Battery Load on Mai ns Load on Maintena.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 81 10.2 INPUT TRANSFORMER CUBIC LE 10.2.1 Introduction The Input Transformer Cubicle is placed in the Input supply path of the UPS . It consist of Star - Star OR Delta - Star transformer of rated capacity to provide Isolation from the Input Distribution supply to the UPS input.
User Manual Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V 82 10.3 BYPASS ISOLATION CUBICLE 10.3.1 Intr oduction Bypass Isolation Cubicle is placed in the Bypass input path of the UPS. It consist of VEE Connected – Transformer of rated capacity to provide 3 phase to 1 phase transformation .
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