N1C NE Series User manual

User Manual
NE Series (20-30kVA)

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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.
Notice
The purchased products, services and features are stipulated by the contract made between N1 Critical
technologies and the customer. All or part of the products .services and features described in this document
may not be within the purchase scope or the usage scope. Unless otherwise specification in the contract, all
statements, information, and recommendations in this document are provided “AS IS”without warranties,
guarantees or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
N1 Critical Technologies
Address: 211 N. Parker Drive
Janesville, WI 53545
Manufacturer: N1 CRITICAL TECHNOLOGIES.
Website: https://n1critical.com
E-mail: [email protected]
Customer Service: 877-226-3311

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All rights reserved ©N1 Critical Technologies, Inc.
NE Series (20-30kVA)
User Manual
Foreword
Foreword
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.
Symbol Conventions
The manual quotes the safety symbols, these symbols used to prompt users to comply with safety
matters during installation, operation and maintenance. Safety symbol meaning as follows.
Symbol Description
Alerts you to a high risk hazard that could, if not avoided,
result in serious injury or death.
Alerts you to a medium or low risk hazard that could, if not
avoided, result in moderate or minor injury.
Alerts you to a potentially hazardous situation that could, if
not avoided, result in equipment damage, data loss,
performance deterioration, or unanticipated results.
Anti-static prompting.
Be care electric shock prompting.
Provides a tip that may help you solve a problem or save time.
Provides additional information to emphasize or supplement
important points in the main text.
Product standard: Q/ZZKJ001

NE Series (20-30kVA)
User Manual
Foreword
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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)

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NE Series (20-30kVA)
User Manual
Contents
Contents
Chapter 1 Safety Description...................................................................................................................1
1.1 Safety Announcements ..............................................................................................................................................1
Chapter 2 Overview..................................................................................................................................5
2.1 Model Meaning..........................................................................................................................................................5
2.2 Product Intro ..............................................................................................................................................................5
2.2.1 Features.............................................................................................................................................................6
2.3 Work Principle...........................................................................................................................................................7
2.3.1 Work Principle Block Diagram ........................................................................................................................7
2.3.2 Work Mode.......................................................................................................................................................8
2.3.3 Work Principle for Series Hot Standby ............................................................................................................9
2.4 Appearance and Panel.............................................................................................................................................10
2.4.1 Appearance .....................................................................................................................................................10
2.4.2 Panel ...............................................................................................................................................................10
Chapter 3 Installation.............................................................................................................................13
3.1 Unpacking and Checking.........................................................................................................................................13
3.2 Environment.............................................................................................................................................................13
3.3 Tools14
3.4 Installation Clearance ..............................................................................................................................................16
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

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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
4.1 Check before Startup ...............................................................................................................................................27
4.1.1 Check the Electrical Connection ....................................................................................................................27
4.1.2 UPS Testing....................................................................................................................................................28
4.2 Precautions for Operating UPS................................................................................................................................28
4.3 Operation .................................................................................................................................................................29
4.3.1 Check Before Power-on .................................................................................................................................29
4.3.2 Start the UPS ..................................................................................................................................................30
4.3.3 Start Load .......................................................................................................................................................30
4.3.4 Shutdown UPS................................................................................................................................................30
4.4 Operation for Manual Maintenance.........................................................................................................................31
4.5 Operation for Parallel System (P-Models Only)......................................................................................................32
4.5.1 Start Parallel System.......................................................................................................................................32
4.5.2 Shut Down Parallel System ............................................................................................................................34
4.5.3 Exit Parallel System Online............................................................................................................................34
4.5.4 Enter a UPS Online ........................................................................................................................................35
4.5.5 Redundancy Function of the Parallel System.................................................................................................35
4.6 Operation of Touch Screen ......................................................................................................................................35
4.6.1 Menu Structure of Touch Screen....................................................................................................................35
4.6.2 Main Page.......................................................................................................................................................36
4.6.3 Work Status of the System .............................................................................................................................37
4.6.4 Controlling Function ......................................................................................................................................43
4.6.5 Monitoring Function.......................................................................................................................................46

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NE Series (20-30kVA)
User Manual
Contents
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
Chapter 6 Troubleshooting ....................................................................................................................70
6.1 Judge the UPS Status ...............................................................................................................................................70
6.2 Deal with Common Faults .......................................................................................................................................71
6.3 Emergency Troubleshooting....................................................................................................................................74
6.4 Replace the Fuse ......................................................................................................................................................75
A Technical Specifications .....................................................................................................................76
B Acronyms and Abbreviations.............................................................................................................79

NE Series (20-30kVA)
User Manual
Chapter 1 Safety Description
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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.
1.1 Safety Announcements
The UPS contains high temperature and high voltage, which can be extremely dangerous. Please
comply with the relevant safety standards and operational procedures during installation, operation and
maintenance, or it may result in death, personal injury or equipment damage. The safety precautions
mentioned in the user manual are only a supplement to local safety regulations. The manufacturer does
not assume responsibility for any breach or violation of general requirements.
The charging voltage requirements of different brands and different types of batteries may vary. Make
sure that the charging voltage of UPS and battery match. If any doubt exists, please consult the
manufacturer for support. Any change of system configuration, structure or components will affect the
performance of UPS. If the user wants to make any changes, please consult with the manufacturer in
advance.
1.
Only authorized professionals are allowed to open the UPS chassis. The input and output voltage
of the UPS is high and dangerous. Contacting high voltage can lead to injury or death.
2.
Please disconnect the AC power and battery to isolate power input before maintenance. Test the
output terminal block with a voltmeter before maintenance to ensure that the input power is turned
off and in a safe condition.
3.
Even if all external power are disconnected, there still exists residual electric charge inside the
UPS, and the output terminal blocks still exists high voltage which may endanger personal life.
Technicians should wait enough time (≥10 min) before opening the UPS chassis an ensure all
charge is released.

NE Series (20-30kVA)
User Manual
Chapter 1 Safety Description
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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.
5.
Conductive objects such as watches, bracelets and rings should not be worn during operation and
maintenance.
6.
The UPS installation should be done only by people who have the qualification of high voltage and
AC power operation. Maintenance and repair for power systems must only be done by
professionally trained technicians.
7.
Leakage risk! The UPS must be grounded before electrical connection. The ground terminal must
be connected to the ground.
8.
It is prohibited to short circuit the positive and negative poles of the battery. The connection of
battery must be tight. It is prohibited to touch the battery’ s two wire connectors or bare wire
terminals, or it may damage the battery and/or endanger life.
9.
Prevent the battery electrolyte from overflowing. The metal objects and circuit board inside the
UPS will be corroded by the electrolyte, which will result in equipment damage and short circuiting.
10.
Battery should be kept away from fire and all other electrical equipment that could cause sparks,
heat or flame. Avoid danger or unnecessary damage to equipment and personnel.
Contacting high voltage or mains directly onto or near wet objects will cause life risk.
The output of UPS cannot connect with unbalanced load, half-wave rectification load or inductive
load, such as air-conditioner, hair dryer, starter, electric drill, motor, daylight lamp, etc.
Inappropriate drilling will damage the device inside the cabinet. Metal debris generated by drilling
enters the cabinet will lead to PCB (circuit board) short circuiting.
Life risk!
Cannot connect with unbalanced load, half-wave rectification load or inductive load!
Drilling holes on the cabinet is prohibited!

NE Series (20-30kVA)
User Manual
Chapter 1 Safety Description
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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.
To prevent static damaging sensitive components, make sure that you are wearing an anti-static wrist
strap before contacting sensitive components (such as the flapper, circuit boards, IC chips, etc.).
Ensure the clip end of the wrist strap is well grounded.
Installing and removing power cables with AC input are prohibited. Please turn off mains switch
before connecting or removing power cables. Before connecting the cable, make sure the cable
connected, cable labels are matched with the actual installation.
reversely, which will cause short circuit.
The UPS should be well grounded, the voltage between ground line and neutral line should be less than 5V.
Non-specified battery will cause damage to UPS.
Battery connection must be done according to the user manual. Non-standard operation will damage
the battery, even endanger life.
Be careful of static!
Installing and removing power cables with AC input are dangerous!
Do not connect the ground wire and neutral wire, live wire and neutral wire
Please use specified battery model!
Battery connection must be done according to instructions!

NE Series (20-30kVA)
User Manual
Chapter 1 Safety Description
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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.
Ensure that no objects are in front of air-in and air-out holes and fans, to keep good ventilation.
When used in a residential building, additional measures should be took to prevent tampering.
When UPS is disconnected, it still contains dangerous voltage, the warning labels should include
1. This line is for UPS power supply. 2. Please disconnect this line before line operation.
Keep good ventilation of the equipment!
The product is class C3 and grade A equipment.
Warning label should be affixed outside UPS position area.

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NE Series (20-30kVA)
User Manual
Chapter 2 Overview
Chapter 2 Overview
This chapter mainly introduces the model meaning, product features, working principle, appearance,
LCD panel, etc. of the product.
2.1 Model Meaning
N1C.NE##L & N1C.NE##PL
“N1C.” is the Manufacturer of the UPS (N1 Critical Technologies)
“NE” is the series name of the company’s three-phase UPS system.
The two-digit number is the maximum output power of the unit (20kVA or 30kVA).
“P” means the UPS can
be connectedin parallel system. (If there is no “P” in the model number,
the unit is NOT able to be connected in parallel).
“ L” means the UPS contains an internal, long-lasting Lithium-Ion battery (lithium-iron-
phosphate chemistry).
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. They are
especially suitable for poor power-grid environments.

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NE Series (20-30kVA)
User Manual
Chapter 2 Overview
2.2.1 Features
The main features of NE Series (20-30kVA) UPS are as follows.
Energy conservation and high efficiency
Adopt advanced IGBT technique, which make the input power factor of UPS more than 0.99, and
greatly improve the electric energy use ratio, alleviate the load on power grid, save costs.
Digitized DSP control
The UPS uses a digital signal processor (DSP) for quickly and precisely controlling contravariance,
synchronizing phases, input power factor correction (PFC) and logics.
Intellectual fans speed regulation control
Fans adjust rotating speed in accordance with the load status to prolong the using life of fans and
decrease working noise of the machine.
ECO energy conservation mode design
The UPS has an ECO energy conservation mode. In this mode, bypass output is prior and the efficiency
of UPS is up to 97%; when the voltage or frequency deviation of bypass is excessive, UPS switches to
the inverter output mode. It not only ensures a reliable power supply for users but also saves energy.
Manual bypass maintenance design
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. The UPS can be applied
to high frequency communication, broadcasting audio and video systems.

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NE Series (20-30kVA)
User Manual
Chapter 2 Overview
Perfect protection function
NE##PL models adopt a no-master-slave equalizing current controlling technology to realize the N+1
redundancy in parallel. Digitization equalizing current control makes the system possess strong self-
adaption capacity, higher reliability and redundancy degree, and convenient installation and debugging.
It can freely enter or exit the parallel system, which achieves the online hot maintenance of parallel
system.
LCD menu
The large liquid crystal display (LCD) shows operational status and parameters in real time; The CPU
in the machine records historical data and alerting information of the device. 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.

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NE Series (20-30kVA)
User Manual
Chapter 2 Overview
AC
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.
Battery Mode
When mains are abnormal, the rectifier will automatically turn to battery input and supply power to
inverter after battery boosting so as to protect output loads from AC power interruptions.
Bypass Mode
When the inverter is abnormal (such as over-temperature, short circuit, output voltage abnormal,
overload and surpasses the power range that the inverter can withstand), the inverter will shut down
automatically to prevent damage. If the mains are still normal at this moment, the static switch will
turn to bypass to supply AC power directly to the load.
Maintenances Bypass Mode
When UPS needs to be maintained or change the battery, and the power must not be interrupted at the
same time, users can first shut down the inverter switch, and then turn on the maintenance bypass
switch, then turn off the battery, mains and bypass switches. Under the mode, AC power goes through
maintenance bypass switch to supply power to load. At this time, there is no electricity inside the UPS
(except N), and the maintainer can perform the maintenance safely.
Maintenance
switch
Bypass
input
Mains SCR
PFC
DC/DC
DC/AC
Load
Mains
Battery
SCR
Battery
input
Charger

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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. If UPS 1 stays in bypass mode and UPS 2 faults, then the mains will sustain the load.
Mains
Figure2-3 Work principle block diagram for series hot standby
Li
Output
Ni
Lo
No
Bypass input
Main UPS
Main input
Bypass input
Standby UPS
Main input
Load

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NE Series (20-30kVA)
User Manual
Chapter 2 Overview
2.4 Appearance and Panel
2.4.1 Appearance
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.

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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
No. Silk-screen Name Description
1
-
Touch screen
Display the UPS parameters and status (such as
voltage, current, load, etc.)
2BYPASS Bypass indicator

Green: Bypass output

Red: Bypass abnormal

Light off: Bypass normal but with no output
3BATT. Battery low-voltage
alarm indicator

Red: Battery abnormal alarm (it will flicker if
battery low-voltage alarm)

Green: Battery voltage normal
4
AC/DC Rectifier indicator

Green: Rectifier works normally

Red: Rectifier fault and protected

Light off: Rectifier is not working.
5
DC/AC Inverter indicator

Green: Inverter works normally.

Red: Inverter fault and protected.

Light off: Inverter is with no output.
6LOAD Load alarm
indicator

Red: output abnormal

Green: Output normal

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NE Series (20-30kVA)
User Manual
Chapter 2 Overview
7ON System On
combination button Press the two buttons simultaneously.
8OFF System Off
combination button
Press the two buttons simultaneously.
9EPO EPO button In emergency, press the EPO button. The UPS
shuts down without output.