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N1C NE Series User Manual

20-30kva
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  • Page 1 User Manual NE Series (20-30kVA)
  • Page 3 Copyright © N1 Critical Technologies 2018. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of N1 Critical Technologies, Inc. Trademarks and Permissions and other N1 Critical Technologies marks are trademarks of N1 Critical Technologies. All other trademarks and trade names mentioned in this document are the property of their respective holders.
  • Page 4 Summaries Thank you for choosing the NE Series (20-30kVA) product. This document gives a description of the NE Series (20-30kVA) product, including the UPS features, performance, appearance, structure, working principles, installation, operation and maintenance. etc. Please save the information after reading, in order to consult in the future.
  • Page 5 NE Series (20-30kVA) User Manual Foreword Change History Changes between document issues are cumulative. The latest document issue contains all the changes made in earlier issues. Issue 001 (2018-04-08) All rights reserved ©N1 Critical Technologies, Inc.

  • Page 6: Table Of Contents

    3.5 Selection of Input and Output Cables ........................16 3.6 Surge Protection...............................17 3.7 Installation of the UPS .............................18 3.7.1 Installation of NE Series (20-30kVA) UPS....................18 3.8 Electrical Connection...............................20 3.8.1 Wiring for Single-unit (NE##L & NE##PL models) ...................20 3.8.2 Wiring for Series System (NE##PL models ONLY) ..................21...
  • Page 7 NE Series (20-30kVA) User Manual Contents 3.8.3 Wiring for Parallel System (NE##PL Models ONLY) ..................22 3.9 Connect Communication Wires..........................23 3.9.1 RS232 Communication ..........................23 3.9.2 RS485 Communication ..........................24 3.9.3 Dry Contact Communication..........................24 3.9.4 SNMP Card (optional)............................25 3.9.5 Battery Switch ..............................25 3.9.6 Anti-reverse Feedback Contactor (Included on “P”-Models) ................25 Chapter 4 Operation Guide ........................27...
  • Page 8 NE Series (20-30kVA) Contents User Manual 4.6.6 Parameters Setting ............................49 4.6.7 Information Inquiry ............................62 Chapter 5 Maintenance Guide.......................67 5.1 Safety Precaution ..............................67 5.2 Periodic Preventative Maintenance .........................67 5.3 Battery Maintenance ..............................68 5.3.1 Precaution for Battery Charging........................68 5.3.2 Battery Maintenance............................68 5.3.3 Battery Replacement ............................68 5.4 Fan Maintenance..............................69...

  • Page 9: Chapter 1 Safety Description

    NE Series (20-30kVA) User Manual Chapter 1 Safety Description Chapter 1 Safety Description This chapter describes the safety symbols and safety announcements. Please read this user manual carefully prior to installing the device. It provides important information on safe and efficient installation.
  • Page 10 NE Series (20-30kVA) Chapter 1 Safety Description User Manual 4. Battery cables are not isolated from AC input. Dangerous voltage may exist between battery terminal and ground terminal. The battery contains high voltages that may cause injury or death. Please make sure they are insulated when installing or using the UPS.
  • Page 11 NE Series (20-30kVA) User Manual Chapter 1 Safety Description It is dangerous to operate during lightning storm! Operation under high voltage and AC operation is prohibited during a lightning storm. During a lightning storm, the atmosphere produces a strong electromagnetic field. In order to avoid equipment from being damaged lightning, the equipment should be grounded appropriately.
  • Page 12 NE Series (20-30kVA) Chapter 1 Safety Description User Manual Be careful for the rotating fan! When remove the fan, do not put fingers or tools into the rotating fans before the fan stops in order to avoid equipment damage or injury.

  • Page 13: Chapter 2 Overview

    2.2 Product Intro NE Series (20-30kVA) products are a high-performance UPS with a pure sine-wave and online double- conversion performance. They are perfect for network closets, server rooms, small electronic equipment, precise instruments, etc. They are used in finance, communication, insurance, transportation, tax affairs, military, security, energy, education, government, enterprise, etc.

  • Page 14: Features

    Design bypass maintenance channel to assure the maintenance on machine without load power break. High EMC performance The NE Series UPS has passed professional tests on electromagnetic compatibility (EMC), including conducting disturbance, radioactive disturbance, conducting anti-disturbance, radioactive anti- disturbance, power falling, mass impulse, static discharging, surge, etc. The predominant EMC characteristics can not only completely filter all kinds of disturbances on the power grid but also efficiently reduce and eliminate the disturbance produced by the UPS itself.

  • Page 15: Work Principle

    The LCD allows you to switch the display language between Chinese and English. 2.3 Work Principle 2.3.1 Work Principle Block Diagram The basic work principle block diagram of NE Series (20-30kVA) is as shown in Figure2-2. All rights reserved ©N1 Critical Technologies, Inc.

  • Page 16: Work Mode

    Figure2-2 The basic work principle block diagram of NE Series (20-30kVA) 2.3.2 Work Mode NE Series (20-30kVA) UPS has 4 work modes: mains mode, battery mode, bypass mode, and maintenance bypass mode. Mains mode When mains are normal, the rectifier converts AC power to DC power, and then charges the battery. It also supplies power for load.

  • Page 17: Work Principle For Series Hot Standby

    NE Series (20-30kVA) User Manual Chapter 2 Overview 2.3.3 Work Principle for Series Hot Standby Connect the bypass input of UPS 1 to the output of UPS 2, it constitutes series hot standby working mode. If UPS 1 faults, it will switch to bypass mode automatically. At this moment, the output of UPS 2 sustains the load which is still in UPS inverting protection status, so as to ensure the safe operation of device.

  • Page 18: Appearance And Panel

    The appearance of NE Series (20-30kVA) UPS is shown in Figure2-4. Figure2-4 Appearance of NE Series (20-30kVA) UPS 2.4.2 Panel The operation panel interface of NE Series (20-30kVA) UPS is as shown in Figure2-5. All rights reserved ©N1 Critical Technologies, Inc.
  • Page 19 NE Series (20-30kVA) User Manual Chapter 2 Overview Figure2-5 Operation interface of NE Series (20-30kVA) UPS The description for the operation interface of NE Series (20-30kVA) UPS is as shown in Table2-1. Table2-1 Definition of operation interface Silk-screen Name Description...
  • Page 20 NE Series (20-30kVA) Chapter 2 Overview User Manual System Press the two buttons simultaneously. combination button System Press the two buttons simultaneously. combination button In emergency, press the EPO button. The UPS EPO button shuts down without output . All rights reserved ©N1 Critical Technologies, Inc.

  • Page 21: Chapter 3 Installation

    NE Series (20-30kVA) User Manual Chapter 3 Installation Chapter 3 Installation This chapter mainly introduces the installation of the product, including unpacking and checking, installation environment, tools, selection of input & output cables, installation procedure, installation preparations, mechanical installation, battery cabinet installation, etc. Before installing, please pay attention to the safety standards in the installation illustration.

  • Page 22: Tools14

    NE Series (20-30kVA) Chapter 3 Installation User Manual 3.3 Tools Tool Appearance Description Clamp-on ammeter Test current Multimeter Used to check cabinet insulation and cable connection, measure electronic performance specifications of a device, such as voltage, current, and resistance. Label paper Used to prepare labels.
  • Page 23 NE Series (20-30kVA) User Manual Chapter 3 Installation Tool Appearance Description Claw hammer Beat, install, and disassemble component. Impact drill, drill Drilling PVC insulation tape Used to insulate wires and conductors. Cotton cloth Used to clean panels and shells. Brush Clean the panel and shell.

  • Page 24: Installation Clearance

    500mm from rear panel to he wall or adjacent equipment, and at last 700mm from the top to ceiling, which is to ensure good ventilation, as shown in Figure3-1. Figure3-1 Installation clearance of NE Series (20-30kVA) UPS Keep the air inlets unobstructed on the front panel and rear panel of the UPS to facilitate ...

  • Page 25: Surge Protection

    NE Series (20-30kVA) User Manual Chapter 3 Installation Table3-1 Selection for input cables Live wire Neutral wire Grounding wire Power Current cross-section cross-section cross-section （kVA） （A） area（mm²） area（mm²） area（mm²） Table3-2 Selection for output cables Live wire Neutral wire Grounding wire...

  • Page 26: Installation Of The Ups

    3.7 Installation of the UPS 3.7.1 Installation of NE Series (20-30kVA) UPS Before installation begins, it is important to make a plan for the location of the UPS and bringing AC Mains wiring to the unit and output wiring from the unit. This is unique in every installation and the planning should be done by a qualified installation technician.
  • Page 27 NE Series (20-30kVA) User Manual Chapter 3 Installation Figure3-3 Appearance Step 3 Rotate the four UPS “feet” in a counter-clockwise direction evenly until the four feet can support the device completely. Remove the bolts connecting the UPS to the pallet. Detach the fixed board from front and rear UPS plates, then rotate the 4 support feet clockwise, ensuring they go all the way up into the UPS.

  • Page 28: Electrical Connection

    Step 3 Connect the input of UPS to mains by input cables. ----End The terminal wiring of NE Series (20-30kVA) UPS is as shown in Figure3-6. The three-phase live wires in the figure are marked by U, V, W, which separately corresponding phase-A, phase-B, phase-C, or phase-R, phase-S, phase-T.

  • Page 29: Wiring For Series System (Ne##Pl Models Only)

    Step 3 Connect the mains input of UPS 1 to the mains input of UPS 2. Step 4 Other wiring is the same as the single unit described in 3.9.1. ----End The terminal wiring of NE Series (20-30kVA) UPS is as shown in Figure3-7 All rights reserved ©N1 Critical Technologies, Inc.

  • Page 30: Wiring For Parallel System (Ne##Pl Models Only)

    Before wiring, please dismantle the short-connected bar between bypass switch and mains switch of UPS 1, and input neutral wire N of UPS 1 firstly. Figure3-7 The terminal wiring of NE Series (20-30kVA) UPS 3.8.3 Wiring for Parallel System (NE##PL Models ONLY) After installing the battery of each parallel system and UPS, connect the parallel wires.

  • Page 31: Connect Communication Wires

    The lead of UPS 1’s and UPS 2’s output N, U, V, W are from the terminal bar of UPS, and short circuited on load or distribution cabinet of load. The connection of parallel system is as shown in Figure3-8. Figure3-8 The terminal wiring of NE Series (20-30kVA) UPS 3.9 Connect Communication Wires 3.9.1 RS232 Communication The RS232/RS485 communication port is located in the rear of the device.

  • Page 32: Rs485 Communication

    NE Series (20-30kVA) Chapter 3 Installation User Manual 3.9.2 RS485 Communication The RS232/RS485 communication port is located in the rear of the device. It supports remote communication. It can realize the remote monitoring for input voltage, frequency, output voltage, frequency, load, etc. of the UPS, and it also can achieve remote power on/ off operation.

  • Page 33: Snmp Card (Optional)

    NE Series (20-30kVA) User Manual Chapter 3 Installation Table3-5 Illustration for external ports of dry contact communication board 1~3P Inverter fault 4~6P Battery low-voltage 7~9P Maintenance bypass 10~12P Inverting 13~15P Overload 16~18P Mains fault 19~21P Bypass status 22~24P Fan fault...
  • Page 34 NE Series (20-30kVA) Chapter 3 Installation User Manual The anti-reverse feedback device is built-in to P-Models only. For the UPS models without built-in anti-reverse feedback device, please check if there is dangerous voltage in main power wiring terminals before wiring or maintenance.

  • Page 35: Chapter 4 Operation Guide

    NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Chapter 4 Operation Guide This chapter mainly introduces the operation guide for the UPS, including pre-startup checklist, precautions for operating UPS, operation and running, operation of parallel system, operation of maintenance switch, etc.

  • Page 36: Ups Testing

    NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Check item Check if the safe identification of AC power distribution unit is complete. Check if the cable connection is tight. Check if the battery is connected in proper polarity and sequence.

  • Page 37: Operation

    UPS, or, it will cause the protection for overload. The calculation of load capacity is as follows. The load capacity of NE series UPS is designed as 90% nominal rated power of resistive load, the most bearable number n of computer is estimated as follows: p is the output capacity (VA) of UPS, pi is the power of load i.

  • Page 38: Start The Ups

    NE Series (20-30kVA) Chapter 4 Operation Guide User Manual 4.3.2 Start the UPS Please perform the following steps to start the UPS. Step 1 Close the input switch of bypass (BYPASS). The power board start to work and the touch screen starts to display.

  • Page 39: Operation For Manual Maintenance

    NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Before disconnecting the output switch, please ensure that the output load is not in use, or, once the output is disconnected, there will be no electric power output, which will cause the power outage for use loads.

  • Page 40: Operation For Parallel System (P-Models Only)

    NE Series (20-30kVA) Chapter 4 Operation Guide User Manual During maintenance for the UPS, the output switch (OUTPUT) is strictly prohibited to close. Step 3 After maintenance, turn on the switch of bypass power (BYPASS), output switch (OUTPUT). After the power work normally and the BYPASS indicator light on, place the manual maintenance switch to OFF, and recover the hanging lock, then thee load turns to bypass to supply power.
  • Page 41 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Press the ON button on the panel for 1S to start the inverter system. 30S later, close the output switch of the UPS, the UPS will invert to output normally. Measure the output voltage and frequency of the UPS is normal by multimeter.

  • Page 42: Shut Down Parallel System

    NE Series (20-30kVA) Chapter 4 Operation Guide User Manual If the output loop current is less than 30A, it means the output voltage of parallel system is normal.  Normal =>Step 13  Abnormal =>Step 12 Step 12 After powering down and getting rid of faults, perform Step 1.

  • Page 43: Enter A Ups Online

    NE Series (20-30kVA) User Manual Chapter 4 Operation Guide When the parallel system is working properly, do not exit the UPS’ output from parallel system without switching off the UPS. Otherwise, the parallel system cannot work properly. 4.5.4 Enter a UPS Online Follow the procedure showed in Figure4-3 to join one or more UPS to a parallel system online.

  • Page 44: Main Page

    NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Mains Phase voltage\phase current\frequency Bypass Phase voltage\phase current\frequency Monitoring Voltage\current\temperature\remaining Battery time\remainder capacity\status Phase voltage\phase current\frequency\load Output \KVA\KW \PF Bypass volt. Upper threshold\Bypass volt. Lower threshold\bypass frequency System management range\ECO mode\ECO volt. Upper threshold\ECO volt.

  • Page 45: Work Status Of The System

    NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-5 Main page It can realize the monitoring for system after entering main page. The meaning of each icon on the main page is as follows. : System bypass input status. If bypass input abnormal, the icon will flicker, and show as : System mains input status.
  • Page 46 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-6 Rectifier startup Figure4-7 Battery is not connected to load, and the rectifier is started. All rights reserved ©N1 Critical Technologies, Inc.
  • Page 47 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-8 Rectifier inverting status (load is on main power with battery now protecting the load). Figure4-9 Battery inverting status (battery is powering the load). All rights reserved ©N1 Critical Technologies, Inc.
  • Page 48 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-10 System bypass status Figure4-11 Rectifier bypass status All rights reserved ©N1 Critical Technologies, Inc.
  • Page 49 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-12 System maintenance bypass output Figure4-13 Protection for fault, and with no output When the system occur abnormal condition, the system will popup fault window, at the same time, there will be a “fault alarm” indicator on the top right corner of main page and information display page, as shown in Figure4-14, Figure4-15.
  • Page 50 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-14 Now Fault window Figure4-15 Fault alarm indicator on Mains Information page After closing the current fault window, click “now fault” indicator to display current fault information, as shown in Figure4-16.

  • Page 51: Controlling Function

    NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-16 Now fault information Click the button on Now Fault page to look up the event log information, as shown in Figure4- Figure4-17 Event log information 4.6.4 Controlling Function ON/OFF On main page, click icon, it will enter on/off interface.
  • Page 52 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-18 On/off interface 1 Figure4-19 On/off interface 2 Click “ON” button, it will enter confirmation interface, click “Confirm” to perform startup operation. All rights reserved ©N1 Critical Technologies, Inc.
  • Page 53 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-20 Confirm to turn on When closing, click OFF button, it will enter confirmation interface, click “Confirm” to perform shutdown operation. Figure4-21 Confirm to turn off All rights reserved ©N1 Critical Technologies, Inc.

  • Page 54: Monitoring Function

    NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Silence buzzer When module or system occurs abnormal status, the buzzer will beep to alarm, and the buzzer indicator on the top right corner of main page show as and flicker. If the system recovers to normal, the icon will disappear.
  • Page 55 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-23 Bypass information (bypass abnormal) Mains information On main page, click icon, it will enter Mains Information interface, as shown in Figure4-24. The page displays the phase voltage, phase current and frequency of current system input mains.
  • Page 56 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-25 Mains information (mains abnormal) Battery information On main page, click icon, it will enter Battery Information interface, the displayed information is as shown in Figure4-26. Figure4-26 Battery information If the battery is not connected, battery status, battery temperature, remaining capacity, remaining time will show as “----”.

  • Page 57: Parameters Setting

    NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Output information On main page, click icon, it will enter output information interface, as shown in Figure4-27. The page displays the phase voltage, phase current, frequency, apparent power, active power and load percentage.
  • Page 58 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual After entering right password (for general user, the initial password is: 111; for maintenance expert, the password is: 222), it will turn to Parameter Setting page, as shown in Figure4-29. General user can look up each system parameter with no setting rights.
  • Page 59 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide The setting range of bypass voltage lower threshold is -15%, -20%, -25%; The range of bypass frequency is:±5%, ±10%. Figure4-31 System management page 2 ECO mode: on, off; ECO voltage upper threshold: +10%, +15%;...
  • Page 60 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-32 Successful setting Figure4-33 Unsuccessful setting Battery management On parameters setting page, click “Battery Manage” icon, it will enter battery manage page, as shown in Figure4-34. All rights reserved ©N1 Critical Technologies, Inc.
  • Page 61 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-34 Battery management Charge current range. Single equalizing charge voltage range. Single floating charge voltage range. Click number input box, it will display the input range of setting value at the top of the input keyboard, when the setting exceeds the range, the setting will be invalid.
  • Page 62 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-35 Battery test page Click “Std. Test” icon, it will popup confirming window, click “confirm” to start standard test, as shown in Figure4-36. Figure4-36 Standard test Click “Deep Test” icon, it will popup confirming window, click “confirm” to start deep test, as shown in Figure4-37.
  • Page 63 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-37 Deep test After starting battery test, the test status will show “std. test” / “deep test”, as shown in Figure4-38. Figure4-38 Battery test During battery testing, if it needs to stop testing, you can enter Battery Test page, click “cancel”...
  • Page 64 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-39 Cancel battery test After finishing the battery test, it will popup the battery test result, as shown in Figure4-40, Figure4- 41, Figure4-42. Figure4-43 shows the prompting window for abnormally exiting when battery test condition is not satisfied.
  • Page 65 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-41 Battery test result: battery capacity low Figure4-42 Battery test result: please check battery All rights reserved ©N1 Critical Technologies, Inc.
  • Page 66 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-43 Abnormal quit for not satisfy battery test condition Restore factory settings On Parameter Setting page, click “default setting” icon, it will popup confirmation window, as shown in Figure4-44. Figure4-44 Restore to default setting After clicking “Confirm”...
  • Page 67 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-45 Setting success prompting window Figure4-46 Setting failure prompting window Screen setting On Parameter Setting page, click “screen setting” icon, it will enter Screen Setting interface, as shown in Figure4-47. All rights reserved ©N1 Critical Technologies, Inc.
  • Page 68 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-47 Screen setting When setting system time, it is necessary to keep the system time and actual time the same, which is good for the veracity of event records and mastering the status of system accurately.
  • Page 69 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-48 Password setting Log manager On Parameter Setting page, click “log manager” icon, it will enter Log Manager page. On the page, you can clear log and user log. Insert U dish, and then you can backup the records. As follows.

  • Page 70: Information Inquiry

    NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Figure4-50 Prompt for clearing log Figure4-51 The U dish is not inserted 4.6.7 Information Inquiry icon to enter Information Inquiry page, the related information is On monitoring page, click as shown in Figure4-52.
  • Page 71 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Figure4-52 Information inquiry Work status On Information Inquiry page, click “working status” icon, it will enter Work Status page, as shown in Figure4-53. Figure4-53 Work status If the battery is not connected, battery status will show as “----”; when the work mode is single mode, the parallel wire status will show as “--”.
  • Page 72 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual Event log On Information Inquiry page, click “event log” icon, it will enter Event Log page. The page records the historical fault and alarm information of the system, as shown in Figure4-54.
  • Page 73 NE Series (20-30kVA) User Manual Chapter 4 Operation Guide Product information On Information Inquiry page, click “product info.” Icon, it will enter Product Info. page, the first page shows the product name, model, manufacturer, contact information, etc. as shown in Figure4-56.
  • Page 74 NE Series (20-30kVA) Chapter 4 Operation Guide User Manual When the probation is opened, the device status shows as . At this time, user can click icon to enter probation unlock page. After successful unlock, the device status will show as...

  • Page 75: Chapter 5 Maintenance Guide

    NE Series (20-30kVA) User Manual Chapter 5 Maintenance Guide Chapter 5 Maintenance Guide This chapter introduces the maintenance of UPS, including safety precautions, periodic preventative maintenance, battery maintenance, fan maintenance and so on. Proper maintenance is the key to enable the device run in the best status and with a longer service life.

  • Page 76: Battery Maintenance

    NE Series (20-30kVA) Chapter 5 Maintenance Guide User Manual Examine the batteries voltage termly to make sure that the voltage of the battery is normal.  Examine the system running status termly to find the failure in time.  5.3 Battery Maintenance 5.3.1...

  • Page 77: Fan Maintenance

    NE Series (20-30kVA) User Manual Chapter 5 Maintenance Guide Replace the used battery with new ones that are in the same capacity, same type and same  manufacturer. It is strictly prohibited to use the battery with different capacity, type and manufacturers.

  • Page 78: Chapter 6 Troubleshooting

    NE Series (20-30kVA) Chapter 6 Troubleshooting User Manual Chapter 6 Troubleshooting This chapter introduces the troubleshooting of UPS, including identifying the UPS Status, UPS emergency troubleshooting measures and so on. 6.1 Judge the UPS Status Table6-1 Common abnormal problems diagnosis NO.

  • Page 79: Deal With Common Faults

    NE Series (20-30kVA) User Manual Chapter 6 Troubleshooting NO. Phenomena Fault diagnosis and checking points Solution Please inform The touch screen Check if the bypass/ mains switch is professionals to and LED are off. closed and the power board is fault.
  • Page 80 NE Series (20-30kVA) Chapter 6 Troubleshooting User Manual Table6-2 only contains some simple troubleshooting. It the answer for diagnosis is not clear or not sufficient, please contact N1 Critical Technologies. Table6-2 Troubleshooting Phenomenon Possible reason Mains is normal, but the UPS...
  • Page 81 NE Series (20-30kVA) User Manual Chapter 6 Troubleshooting Phenomenon Possible reason After starting, the UPS works In the status of battery supply power, the battery is normally, but some time later, protected for low-voltage caused by discharging, the shuts down system shuts down automatically.

  • Page 82: Emergency Troubleshooting

    NE Series (20-30kVA) Chapter 6 Troubleshooting User Manual Phenomenon Possible reason There is mains, but the buzzer Voltage or frequency of mains exceeds the range of beeps intermittently, mains UPS. indicator is off. Under mains status, the UPS Bad grounding causes the float voltage between neutral works normally;...

  • Page 83: Replace The Fuse

    NE Series (20-30kVA) User Manual Chapter 6 Troubleshooting 6.4 Replace the Fuse When there is something wrong with the device, the fuse can effectively protect the key components, and separate the fault from the system to avoid the fault expanding. If the fuse is damaged, it is necessary to replace the fuse that with the same type or passed the safety criterion and with the same character on the basis of corresponding rules.

  • Page 84: A Technical Specifications

    NE Series (20-30kVA) A Technical Specifications User Manual Technical Specifications Model NE20L/NE20PL NE30L/NE30PL Items 208V Voltage range (Vac) Rectifier input frequency 50/60±10% range (Hz) Bypass synchronization 50/60±5% （±10% optional） tracking range (Hz) Bypass input voltage range +20%/+15%/-15%/-20%/-25% Input power factor (PF) ＞0.99...
  • Page 85 It provides dry contact communication and RS232/RS485, and it also can equip with optional SNMP to realize intelligent monitoring of UPS. Battery monitoring function The NE Series is equipped with a battery monitoring and management system, which can realize the monitoring of work status for single battery.
  • Page 86 NE Series (20-30kVA) A Technical Specifications User Manual Model NE20L/NE20PL NE30L/NE30PL Items Cooling way Forced air cooling Operation temperature (℃) 0-40º -25℃~+55℃. If the transporting and storage temperature exceed the work temperature, it is necessary to place the UPS to normal operation...

  • Page 87: B Acronyms And Abbreviations

    NE Series (20-30kVA) User Manual B Acronyms and Abbreviations Acronyms and Abbreviations Alternating Current Direct Current Digital Signal Processor Electromagnetic compatibility Emergency Power Off Electrostatic Discharge ESSD Electrostatic Sensitive Devices Liquid Crystal Display Light-Emitting Diode Printed Circuit Board RS232 Recommended Standard 232...
  • Page 88 NE Series (20-30kVA) B Acronyms and Abbreviations User Manual All rights reserved ©N1 Critical Technologies, Inc.

This manual is also suitable for:

Ne20lNe20plNe30lNe30pl

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