N1C NE, NE20L, NE20PL, NE30L, NE30PL User Manual

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User Manual

NE Series (20-30kVA)

Page 2

Page 3

N1 Critical Technologies

Janesville, WI 53545

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.

Address: 211 N. Parker Drive

Manufacturer: N1 CRITICAL TECHNOLOGIES.

Website: https://n1critical.com

E-mail: [email protected]

Customer Service: 877-226-3311

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NE Series (20-30kVA)

User Manual

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

Foreword

Alerts you to a high risk hazard that could, if not avoided,

result in serious injury or death.

Product standard: Q/ZZKJ001

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.

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NE Series (20-30kVA)

User Manual

Foreword

iii

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

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

Appearance and Panel.............................................................................................................................................10

2.4

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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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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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

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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.

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.

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.

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.

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Chapter 1 Safety Description

10.

Life risk!

Cannot connect with unbalanced load, half-wave rectification load or inductive load!

Drilling holes on the cabinet is prohibited!

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.

Conductive objects such as watches, bracelets and rings should not be worn during operation and

maintenance.

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.

Leakage risk! The UPS must be grounded before electrical connection. The ground terminal must

be connected to the ground.

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.

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.

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.

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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

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!

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.

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Chapter 1 Safety Description

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

Keep good ventilation of the equipment!

The product is class C3 and grade A equipment.

Warning label should be affixed outside UPS position area.

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.

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Chapter 2 Overview

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 connected in 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).

This chapter mainly introduces the model meaning, product features, working principle, appearance,

LCD panel, etc. of the product.

2.1 Model Meaning

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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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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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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Chapter 2 Overview

Maintenance

Bypass

input

Mains SCR

PFC

DC/DC

DC/AC

Load

Mains

Battery

input

switch

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.

SCR

Charger

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.

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Chapter 2 Overview

2.3.3 Work Principle for Series Hot Standby

Output

Main UPS

Standby UPS

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

Bypass input

Main input

Figure2-3 Work principle block diagram for series hot standby

Bypass input

Main input

Load

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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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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

Touch screen

Display the UPS parameters and status (such as

voltage, current, load, etc.)

Green: Bypass output

BYPASS Bypass indicator

Red: Bypass abnormal

Light off: Bypass normal but with no output

BATT.

Battery low-voltage

alarm indicator

Red: Battery abnormal alarm (it will flicker if battery low-voltage alarm)

Green: Battery voltage normal

Green: Rectifier works normally

AC/DC Rectifier indicator

Red: Rectifier fault and protected

Light off: Rectifier is not working.

Green: Inverter works normally.

DC/AC

Inverter indicator

Red: Inverter fault and protected.

Light off: Inverter is with no output.

LOAD

Load alarm

indicator

Red: output abnormal

Green: Output normal

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Chapter 2 Overview

System On

Press the two buttons simultaneously.

combination button

OFF

System Off

Press the two buttons simultaneously.

combination button

EPO EPO button

In emergency, press the EPO button. The UPS

shuts down without output

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NE Series (20-30kVA)

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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.

3.1 Unpacking and Checking

Unpack the UPS and conduct the following items:

 Inspect the UPS appearance for shipping damage. If any shipping damage is found, report it to the

carrier and your local dealer immediately. Please provide photos of the UPS damage to us, and

we will offer corresponding service.

 Check the delivery list to see if the order is complete and correct. If there is any discrepancy,

take notes and contact the distributor immediately.

3.2 Environment

The UPS installation environment should meet the following requirements:

 The temperature and humidity are within the range of 0–40°C and 0% –95% respectively.

 It is strictly prohibited to install UPS in a working environment where there is metal conductive

dust.

 Don’t install UPS outdoors.

 Install the UPS in an environment with good ventilation and free of dust, volatile gas, salt, and

corrosive materials. Keep the UPS far away from water, heat source, flammable and explosive

substances. Avoid direct sunlight.

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Chapter 3 Installation

3.3 Tools

connection, and measure electronic

Tool Appearance Description

Clamp-on ammeter

Multimeter

Label paper

Phillips screwdriver (2 mm

x 150 mm and 3 mm x 250

mm)

Slotted screwdriver（2mm×

80mm）

Socket wrench

Test current

Used to check cabinet insulation and cable

performance specifications of a device, such

as voltage, current, and resistance.

Used to prepare labels.

Used to tighten screws and bolts.

Connect cable, fasten screw

Used to tighten bolts and nuts.

Adjustable spanner

Torque wrench

COAX crimping tool

Diagonal pliers

Wire stripper

Fasten bolt

Used to crimp cord end terminals.

Used to cut insulation cables and cable ties.

Used to remove the insulation layer and

jacket from a communication cable with a

small cross-sectional area.

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Chapter 3 Installation

Tool Appearance Description

(ESD) from damaging a board or other

Claw hammer

Impact drill, drill

PVC insulation tape

Cotton cloth

Brush

Heat shrink tubing (Φ14 、

Beat, install, and disassemble component.

Drilling

Used to insulate wires and conductors.

Used to clean panels and shells.

Clean the panel and shell.

Used to insulate wires and conductors.

Φ18、Φ20、Φ25）

Heat gun

Electrician's knife

Protective gloves

ESD gloves

Insulated gloves

Used to heat a heat shrink tubing.

Used to strip cables.

Used to protect hands and the device on

which you operate.

Used to prevent the electrostatic discharge

electrostatic sensitive devices (ESSDs) when

you insert or remove a board or hold

an ESSD.

Used to insulate hands.

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Chapter 3 Installation

Tool Appearance Description

Hydraulic pliers

Cable tie

3.4 Installation Clearance

The UPS installation clearance should meet the following requirements:

 Maintain a clearance of at least 1000mm from the front panel to the wall or adjacent equipment,

at least 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.

Used to crimp the OT terminals and JG

terminals with a large cross-sectional area

of 10 mm

Used to bind cables.

, 16 mm2, 25 mm2, or 35 mm2.

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

ventilation and heat dissipation. Otherwise, the UPS internal temperature will rise, which will

shorten the lifetime of the UPS.

3.5 Selection of Input and Output Cables

For the selection of cross-section area of input and output cables, please refer to Table3-1, Table3-2

and Table3-3 for corresponding recommended values, and choose upwards.

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Chapter 3 Installation

Table3-1 Selection for input cables

Power

（kVA）

Current

（A）

Live wire

cross-section

area（mm²）

Neutral wire

cross-section

area（mm²）

20 68 16 16

30 102 25 25

Table3-2 Selection for output cables

Power

（kVA）

Current

（A）

Live wire

cross-section

area（mm²）

Neutral wire

cross-section

area（mm²）

20 61 16 16

30 91 25 25 16

Table3-3 Selection for battery cables

Grounding wire

cross-section

area（mm²）

Grounding wire

cross-section

area（mm²）

Power

（kVA）

Battery

quantity

20 16 113 25

30 16 170 35

The cross-sectional area listed in Table3-1, Table3-2 and Table3-3 is recommended cables crosssection area for 5 m long lines. Longer lines require larger cross-sectional areas.

3.6 Surge Protection

If the UPS is installed in a lightning-prone area, install multiple surge protection devices between the

power grid and the UPS. The UPS installed outdoors requires a higher surge protection level than those

installed indoors.

Max. current

Wire cross-section area（mm2）

（A）

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Chapter 3 Installation

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.

Move the UPS from the wooden packaging pallet to the ground before installing.

Step 1 Determine the installation position, set four M12 expansion bolts into the ground following

the measurements in Figure3-2.

Figure3-2 Installation dimension

Required interval: 771mm×350mm. The exposed height of expansion bolt should be within 50mm,.

Step 2 Take out the UPS from the package. The appearance is as shown in Figure3-3.

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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. This will put the weight of the device on the wheels. Attach

ramp in front of the UPS, aligning it with the pallet. Loosen the brakes of front wheels and roll

the UPS to the ground slowly. Use multiple persons as UPS unit is heavy. Push the UPS into

position with the expansion bolts. Lower the four support feet counter-clockwise until they

reach the floor to stabilize the unit. Lock the UPS into place with the expansion bolts and

corresponding nuts.

Figure3-4 Bottom structure

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Chapter 3 Installation

The exposed height of expansion bolt should be within 50mm.

----End

3.8 Electrical Connection

3.8.1

Wiring for Single-unit (NE##L & NE##PL models)

Connect the within cables to corresponding terminals and ensure reliable connection.

While wiring, please ensure that the contact of input and output cables, input and output

terminals is reliable. Avoid bad connection or reverse connection.

When used in signal-unit, the live wire and neutral wire of bypass do not need to connect with

other wires. The input neutral wire and output neutral wire share the same neutral wire

terminal.

Step 1 Open the shrouding cover at the bottom of rear plate, you can see the input and output terminals.

The terminals are battery, mains, bypass and output separately, in proper order from right to

left.

Step 2 Connect the protective ground wire to the binding post of the UPS. The UPS cabinet should

be grounded.

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.

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Chapter 3 Installation

Figure3-6 The wiring terminal of NE Series (20-30kVA) UPS

3.8.2 Wiring for Series System (NE##PL models ONLY)

The wiring way of series hot standby system is as follows.

Step 1 Dismantle the cover of terminal bar at the back of the UPS, then you can see load disconnectors

and wiring terminal. The load disconnector are respectively battery, mains, bypass,

maintenance bypass, output from left to right, thereinto, the battery disconnector is optional.

Step 2 Dismantle the short-connected bar between bypass switch and mains switch of UPS 1, and

input neutral wire of UPS 1. Connect the three-phase output live wire of UPS 2 to bypass

switch of UPS 1 according to the phase sequence. Connect the output neutral wire of UPS 2

to input neutral wire of main UPS.

The phase sequence of mains input cannot be connected reversely, or the UPS will not start

normally, and the touch screen will prompt wrong phase sequence. If the input phase

sequence wrong, it is necessary to exchange properly.

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

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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. The wiring way

is as follows.

The phase sequence of mains cannot be connected inversely, or the device will not start

normally, at the same time, the touch screen displays wrong phase sequence. If the phase

sequence is wrong when startup, it is necessary to change them to correct status.

The connection, phase sequence of each unit’s AC input should be strictly in accordance with

others, ensure that the bypass power supply of parallel system are the same.

Before powering on, check that the phase of the two UPSs input three-phase is corresponding,

then measure that the input voltage between U, V, W should be less than 5V.

Step 1 Open the rear sealing plate of each paralleled UPS, and then dismantle the cover of terminal

bar.

Step 2 Connect the AC input of each paralleled UPS to mains.

Step 3 Connect the AC output of each paralleled UPS to load or distribution cabinet of load.

Step 4 Connect the battery input port of each paralleled UPS to corresponding battery group.

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Step 5 Connect the parallel communicating connector of each paralleled UPS by parallel cables

(shielding communication wire), and fasten the corresponding parallel communicating

connector by bolts.

----End

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. 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.

Definition for RS232 pins:

DB9(RS232/485): 6P, RXD of UPS;

DB9(RS232/485): 7P, GND;

DB9(S232/485): 9P, TXD of UPS.

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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.

Definition for RS485 pins:

5P of DB9(RS232/485): A;

7P of DB9(RS232/485): GND;

8P of DB9(RS232/485): B.

3.9.3 Dry Contact Communication

The dry contact communication board is as shown in Figure3-9.

Figure3-9 Dry contact communication board

The illustration for external ports of dry contact communication board is as shown in Table3-5.

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Table3-5 Illustration for external ports of dry contact communication board

1~3P

4~6P

7~9P

10~12P

13~15P

16~18P

19~21P

22~24P

25~27P

Inverter fault

Battery low-voltage

Maintenance bypass

Inverting

Overload

Mains fault

Bypass status

Fan fault

Anti-reverse feedback contactor

3.9.4 SNMP Card (optional)

It realizes the remote control for input voltage, frequency, output voltage, output voltage, frequency,

load, etc. of UPS, and it also can achieve remote control for power on/off.

Before leaving factory, the controlling wire of the UPS has been fixed on the installation port which

marked with SNMP. When installing, it only needs to connect the controlling wire and SNMP card.

3.9.5 Battery Switch

The UPS is equipped with a battery switch.

3.9.6 Anti-reverse Feedback Contactor (Included on “P”Models)

If the main power supply cannot be used, voltage or energy inside the UPS may be reversed (feedback)

to any input terminal directly or indirectly and generate reverse feedback electricity (back-feed). To

decrease the electric shock caused by reversed feedback, it is necessary to have an anti-reverse feedback

device on Parallel-Connectable (P-Series) models so the device meets the IEC62040-1-2 Standards.

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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.

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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.

4.1 Check before Startup

4.1.1

Check the Electrical Connection

No. Check item

Confirm that battery switch (BATTERY), mains switch (MAINS), bypass switch

(BYPASS), maintenance bypass switch (MAINTENANCE BYPASS), output switch

(OUTPUT) of UPS 1 are all off.

Confirm that the total load capacity matches with the capacity of UPS and make sure the

load is off.

Confirm that there is no short-circuit between input live line and input neutral line, input

live line and input ground line. Confirm that there is no short-circuit in output.

Test the AC voltage of UPS 1’s mains input on the input terminal (POWER). The voltage of

AC input should be within the range of 85V-135Vac, or it needs to start the UPS without

mains.

If the UPS 1 is equipped with battery switch, measure the DC voltage of battery input

terminal (BATTERY), if the UPS is not equipped with battery switch, measure the DC

voltage of battery cabinet input terminal (BAT.), and check the wire connection of battery

cabinet and UPS. It is required that the voltage of battery group is the voltage required by

the device, which is to avoid wrong wire connection of battery.

6 Check if the color of AC cables is in accordance with electrical codes.

7 Check if the wiring of cabinet is firmly attached.

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No. Check item

8 Check if the safe identification of AC power distribution unit is complete.

9 Check if the cable connection is tight.

10 Check if the battery is connected in proper polarity and sequence.

11 Check if the cable identification is correct.

Check if the wiring is neat, and if the cable connection is in accordance with the

electrical codes.

Check if the equipment installation and wiring is advantageous to the transformation,

expansion and maintenance of the system in future.

4.1.2 UPS Testing

Test UPS: close the battery switch, mains switch, bypass switch, and start the UPS. After the UPS

working stably and stay in mains inverting to output, disconnect the mains switch to simulate the mains

outage, the UPS will turn to battery inverting to output, at the same time, the buzzer beeps slowly; then

disconnect the battery switch to simulate the status of protection for battery low-voltage, the UPS will

turn to bypass output, and the buzzer beeps constantly to alarm.

4.2 Precautions for Operating UPS

 Before starting the UPS, check whether the load is proper. The load must not exceed the rated

output power of the UPS. Otherwise, the UPS may turn into overload protection status.

 Do not use the <ON> and <OFF> switch on the UPS panel as the power supply switches of loads.

Do not start the UPS frequently.

 When the mains supply is off, start the generator firstly if the UPS needs to be connected to it. Do

not connect the UPS to the generator before the generator works stable. Otherwise, the UPS or the

load may get damaged. Switch off the UPS before switching off the generator.

Prior to the first startup of UPS, the power and UPS needs to be checked. Only with passing the

examination, power the UPS. If UPS hasn’t been used for a long time, it also needs to be checked

before startup. Operation procedure is showed in Figure4-1.

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Startup

If it is left unused

Observe indicator light on panel

Qualified

Check before

powering on

Shutdown

Power

Failure

Running

StartupPower on

Inquire system information

stable

loads

for longtime

Figure4-1 Operation Procedure

4.3 Operation

4.3.1

Check Before Power-on

Before power on, please check according to following steps. If the check is OK, the UPS can be

started.

Step 1 Connect the input power end with rated input power.

Step 2 Check load.

off

Shutdown

loads

If you will stop using UPS

Ensure that the load is non-inductive load. The output of UPS cannot connect with

inductive load, such as motors, fans, air-conditions. The power of these loads is

generally supplied by power-grid directly.

Ensure that the load is closed and the load capacity does not exceed the rated output capacity of 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.

Step 3 Ensure that there is no short-circuit between live wire and neutral wire, live wire and earthing

wire of the UPS input. As the same to confirm the output of UPS with no short-circuit.

Step 4 The switches of UPS input and output are all off.

Step 5 Ensure that the computer or other devices are closed.

----End

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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.

Step 2 Close the input switch of rectifier (MAINS).

If the mains input power is right, the rectifier will activate automatically, 30S later, the DC

voltage will be set up completely, the rectifier indicator (AC/DC) on the panel will be on.

Step 3 Close the input switch of battery (BATTERY).

Close the switch of external battery, ensure that the LED indicator on the detecting board of

battery polarity is off and the buzzer is silent, and then close the battery switch of the UPS.

Step 4 Start the inverter system.

Press the ON combination buttons on the panel for 1S to start the inverter, the DC/AC indicator

will be on. 30S later, close the output switch, the UPS will invert output normally. It also can

be performed by touch screen to start the UPS.

----End

4.3.3 Start Load

Step 1 See the running status of UPS according to the indicator light on panel. When lights indicate

that UPS works in mains mode or battery mode, it means UPS can power loads.

Step 2 Let UPS keep running without load for 10min and then turn on loads in sequence: big-power

load to small-power load.

----End

4.3.4 Shutdown UPS

Please perform the following steps to shut down the UPS.

Step 1 Disconnect the switches of the load.

Step 2 Disconnect the output switch.

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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.

Step 3 Close the inverter system.

Press the OFF combination buttons on the panels for 1S, the inverter will be closed. The

operation also can be performed through touch screen.

Step 4 Disconnect the battery input switch, including the UPS’s input switch (BATTERY), battery

cabinet input switch and other external battery input switches.

Step 5 Disconnect the rectifier input switch (MAINS).

Disconnect the rectifier input switch, the rectifier will not transfer DC power from mains to

DC BUS, DC BUS will release electric power slowly, about 5 minutes later, the voltage will

drop to a safe voltage. To ensure safety, only start maintenance to the UPS after 10 minutes.

Step 6 Disconnect the bypass input switch (BYPASS).

Disconnect the bypass input switch, after the touch and LED off, the UPS will be shut down

completely.

----End

4.4 Operation for Manual Maintenance

To perform maintenance without any power interruption, follow the instructions.

The following operations should be done by professionals. Manufacturer doesn’t take the

responsibility for problems caused by unauthorized or untrained persons.

Step 1 Press the OFF button on the panel to close the inverter.

Step 2 After the BYPASS indicator on the panel lighting on, close the switches of rectifier mains and

battery (the battery switch of the UPS (if equipped) and battery cabinet switch are all off).

Take out the hanging lock of maintenance switch, place the switch of manual maintenance to

“ON”, then turn off the switch of bypass power (BYPASS) and output switch (OUTPUT), and

then start maintenance.

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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.

Step 4 Shut down the UPS according to 4.3.4 Shutdown UPS.

----End

4.5 Operation for Parallel System (P-Models Only)

4.5.1

Start Parallel System

Don’ t turn on loads before starting parallel system completely. Make sure all switches of

parallel system’ s load are disconnected and all the input and output power lines are

connected correctly.

Perform the following steps to start the parallel system.

Step 1 Close the bypass switch of the UPS 1, the power board start to work, and the touch screen

begin to display.

Step 2 Close the mains switch of the UPS 1.

If the input power is normal, the rectifier will activate automatically. 30S later, the voltage of

DC BUS is set up completely, and the AD/DC indicator on the panel lights on.

Step 3 Close the battery switch of the UPS 1 (if there is no battery switch, close the battery cabinet

switch and external switches).

Step 4 Close the battery switch to the rectifier to start to charge for the battery.

Step 5 Start the inverter system of the UPS 1.

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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.

 Normal => Step 6

 Abnormal => Step 12

After the output is normal, it is necessary to close the output switch of the main UPS again.

But the main UPS should be on.

Step 6 Start the UPS2 according to Step1 to Step3.

Step 7 Measure whether the output voltage and frequency of the UPS2 is normal (the output switch

of UPS2 is off).

 Normal => Step 8

 Abnormal => Step 12

Step 8 Measure whether the output voltage difference of the UPS 1 and UPS 2 is normal.

If the voltage difference of the two UPSs is less than 10V, it means the phase-lock of the two

UPSs in mains status is normal.

 Normal => Step 9

 Abnormal =>Step 12

Step 9 Disconnect the mains switches of the two UPSs, measure whether the voltage difference for

output live wires of the two UPSs is normal.

If the voltage difference is less than 10V, it means the phase-lock of the two UPSs in battery

status is normal.

 Normal => Step 10

 Abnormal => Step 12

Step 10 Close the output switch of UPS 2, and measure whether the paralleled three-phase output

voltage is normal.

If the measured voltage is less than 5V, it means the output of the UPS 2 is normal.

 Normal => Step 11

 Abnormal =>Step 12

Step 11 Close the mains switches of the two UPSs, and measure whether the paralleled output loop

current is normal.

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If the output loop current is less than 30A, it means the output voltage of parallel system is

Disconnect the parallel units

normal.

 Normal =>Step 13

 Abnormal =>Step 12

Step 12 After powering down and getting rid of faults, perform Step 1.

Step 13 After testing normally, close the switch of user load, then the starting of parallel system will

be finished.

At this moment, the parallel system can supply power for load. The power on sequence of load,

please refer to the requirements of single unit.

----End

4.5.2 Shut Down Parallel System

Step 1 Close all loads.

Step 2 Close each inverter according to the shutdown steps of the UPS.

Step 3 Perform the shutdown steps of the UPS, and disconnect the relative input and output switches

of each UPS.

----End

It is recommended that you do not switch on or switch off the parallel system frequently when it is working properly.

4.5.3 Exit Parallel System Online

When one UPS fails, it will exit from the parallel system automatically. In addition, an audible and

visual alarm is generated. You can follow the procedure showed in Figure4-2to exit the faulty UPS to

achieve online thermal maintenance or replacement.

Close the fault UPS according to shutdown procedure

Figure 4-2 Exit a faulty UPS

air switch to UPS in the parallel distribution box.

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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. After

the new UPS run properly, they will join the parallel system and run with average current.

Install the adding

parallel unit

Figure 4-3 Enter a UPS online

Close the adding

UPS air switch

4.5.5 Redundancy Function of the Parallel System

When adopting the design of 2+1 parallel redundant backup, the total output load cannot be greater

than 2 times the rated output of a single-unit. When one single-unit is in fault, the single-unit can enter,

exit freely and does not influence the operating of parallel system, which can enhance the reliability of

the system. When the load exceeds the above capacity, the overload single-unit (more than N/(N+1)

times rated output of single-unit), it will send alarm. For example, for the system with double UPS to

backup, if the load of single-unit exceeds 50% rated power, it will send overload alarm.

4.6 Operation of Touch Screen

The touch screen provides a graphical user interface for the UPS. By touch screen, indicator light and

user-friendly operation system, users can easily browse the input, output, load, and battery parameters

of the UPS to get the current status and warning information of UPS in time and to see functions and

control UPS. Touch screen can also provide historical alarm log for users, and provide a reliable basis

for fault diagnosis.

Start the adding UPS in order

according to the UPS startup steps

4.6.1 Menu Structure of Touch Screen

Menu structure of the touchscreen shows the function for inquiry and setting. The menu structure is as

shown in Figure4-4.

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Figure4-4 Menu structure of the touch screen

Product information

Log management

Screen setting

Battery testing

Battery management

System management

Output

Battery

Bypass

Mains

ON/OFF

Controlling

Silence buzzer

Product name\ model\ manufacturer\

production base\postcode\ service

hotline\SN\rectifier version\ inverter

version\ hardware version\system version\

protocol version\HMI version\ device status

User log

Event records

Information

Working status

Clear log\backup log

Restore default setting

Password setting

Date\time\backlight brightness\backlight

time\language

Display: battery voltage\battery current\ discharged capacity\test time\test status Setting: standard test\deep test \cancel test

Charge current\ single floating charge

voltage\ single equalizing charge voltage

Setting

Bypass volt. Upper threshold\Bypass volt.

Lower threshold\bypass frequency range\ECO mode\ECO volt. Upper threshold\ECO volt. upper threshold

Phase voltage\phase current\frequency\load

\KVA\KW \PF

Voltage\current\temperature\remaining

time\remainder capacity\status

Phase voltage\phase current\frequency

Monitoring

Phase voltage\phase current\frequency

Welcome page

4.6.2 Main Page

It will enter system monitoring main page after powering on, as shown in Figure4-5.

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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. If the mains input abnormal, the icon will flicker, and show as

: Battery status. If the battery abnormal, the icon will flicker, and show as .

: Rectifying status. If the rectifier fault, the icon will flicker, and show as .

: Inverting status. If the inverter fault, the icon will flicker, and show as .

: System output status. If the output abnormal, the icon will flicker, and show as .

: system parameters setting.

: Information inquiry.

: Power on/off.

4.6.3 Work Status of the System

The work status and energy flow on the main page shows the running status of the system directly.

The energy flow of each work status is as follows.

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Figure4-6 Rectifier startup

Figure4-7 Battery is not connected to load, and the rectifier is started.

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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).

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Figure4-10 System bypass status

Figure4-11 Rectifier bypass status

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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.

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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.

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Figure4-16 Now fault information

Click the

17.

Figure4-17 Event log information

button on Now Fault page to look up the event log information, as shown in Figure4-

4.6.4 Controlling Function

ON/OFF

On main page, click icon, it will enter on/off interface. When the system stay in starting status,

the ON button cannot be operated. As shown in Figure4-18, Figure4-19.

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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.

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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

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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

normal, the icon will disappear. Click

closed, if there is new fault, the buzzer will start again.

4.6.5 Monitoring Function

Bypass information

On main page, click icon, it will enter Bypass Information page, as shown in Figure4-22. The

page displays the phase voltage, phase current and frequency of current system input bypass.

and flicker. If the system recovers to

icon to close/ open the buzzer. When the buzzer is

Figure4-22 Bypass information

If the bypass loss phase or phase sequence abnormal, the data shows as “N/A” , and prompts related

abnormal information. When bypass power down, the frequency will show “ N/A” . As shown in

Figure4-23.

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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.

Figure4-24 Mains information

If the mains lose phase or phase sequence abnormal, the data shows as “N/A” , and prompts related

abnormal information. When mains power down, the frequency will show “ N/A” . As shown in

Figure4-25.

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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 “----”.

System will display the charging current/discharging current according to battery status automatically.

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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.

Figure4-27 System output information

4.6.6 Parameters Setting

On main page, click icon, it will enter Login interface, as shown in Figure4-28.

Figure4-28 Login interface

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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. Maintenance expert can look up and set each

parameter.

Figure4-29 Parameter setting interface

System Management

On Parameter Setting page, click system manage icon to enter System Manage interface, specific

parameters as shown in Figure4-30, Figure4-31. Click pulldown menu to change parameters.

Figure4-30 System management page 1

The setting range of bypass voltage upper threshold is +15%, +20%;

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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%;

ECO voltage lower threshold: -10%, -15%.

After changing the parameter, it is necessary to click

is successful, there will be a

setting is unsuccessful, there will be a

icon at the right side of the parameter, as shown in Figure4-32, if

icon at the right side of the parameter, as shown in

Figure4-33.

button to save the setting. If the setting

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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.

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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

Battery test

keyboard, when the setting exceeds the range, the setting will be invalid. After setting, click

button to save the setting. Successful setting/ unsuccessful setting identification is the same as that of

system management.

On Parameter Setting page, click “battery test” icon to enter battery test page, as shown in Figure4-

35.

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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.

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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”

button to cancel battery test, as shown in Figure4-39.

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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.

Figure4-40 Battery test result: normal

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Figure4-41 Battery test result: battery capacity low

Figure4-42 Battery test result: please check battery

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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” button, if the setting is successful, it will popup the prompting window as

shown in Figure4-45, if the setting is unsuccessful, it will popup the prompting window as shown in

Figure4-46.

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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.

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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.

Password setting

On Parameter Setting page, click “password setting” icon, it will enter Password Setting page. The

current user’s password can be changed only, as shown in Figure4-48. The password is 1 to 6 positions

Arabic numerals. After filling in new password, click “confirm” button to save the setting.

Remember your password. There is no master password that will let you reset any forgotten

passwords and the manufacturer cannot help you if your password information is lost or

forgotten.

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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.

Figure4-49 Log manager

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Figure4-50 Prompt for clearing log

Figure4-51 The U dish is not inserted

4.6.7 Information Inquiry

On monitoring page, click icon to enter Information Inquiry page, the related information is

as shown in Figure4-52.

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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 “--”.

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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.

Figure4-54 Event log

User log

On information inquiry page, click “user log”, it will enter User Log page, as shown in Figure4-55.

Figure4-55 User log

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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.

Figure4-56 Product information page 1

The second page shows product version information and device status, as shown in Figure4-57

Figure4-57 Product information page 2

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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

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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.

5.1 Safety Precaution

Pay attention to the following safety operation regulations:

 Remember that there always exists hazardous voltage inside UPS even when UPS does not run.

Before maintaining the UPS, use a multimeter to check the voltage and make sure that the UPS is

completely closed.

 Before operating the UPS, remove rings, necklaces, watches or other conductive metal

ornaments. Do not wear loose clothing.

 Operate it in strict accordance with safety procedures. If in doubt, please consult a certified

electrical technician to maintain your equipment.

 The UPS has the function of battery polarity detecting. If the switch of external battery is closed

or battery polarity detection LED is on, that means the battery polarity is reverse connected, it is

necessary to disconnect the external battery switch and adjust the battery wiring.

 Keep environment clean to avoid dust or chemical contamination pollution to UPS.

5.2 Periodic Preventative Maintenance

To improve the efficiency and reliability of the UPS system, please complete the following

preventative maintenance operations (every 3 months):

 Examine the input and output terminals termly to ensure the good contact.

 Examine fans working status termly to prevent sundries from plugging up the ventilation. If any

damage, please replace it at the time.

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 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

Precaution for Battery Charging

 When cleaning battery case, use a damp (water) cloth. Do NOT use oil substance or organic,

flammable solvents such as gasoline or thinner. Do not touch the battery terminals with the

cleaning cloth.

 Battery should be kept away from fire as well as all electrical equipment which may easily cause

spark to avoid explosion.

 To prevent batteries from starting a fire, do not short-circuit battery terminals.

 Battery electrolytes irritate skin. To avoid electrolyte leakage, do not open battery covers.

5.3.2 Battery Maintenance

To ensure a long battery lifespan, perform the following maintenance tasks periodically.

 Normally it needs to charge and discharge the battery once every 4~6 months, and charging time

should not be less than 24h every time.

 In high temperature area, the battery should be charged and discharged once every two months,

and charging time should be not less than 24h every time.

 If battery hasn’t been used for a long time, it should be charged and discharged every three

months, and charging time should not be less than 24h.

 Do not over-discharge batteries. After batteries stop discharging, fully charge them within 24

hours.

 After using for six months, check that whether battery cables are properly connected.

 If the UPS is not used, please disconnect the battery switch on the UPS to avoid long-time

discharge after mains failure.

5.3.3 Battery Replacement

Observe the following precautions when replacing a battery:

 Consult professional technicians for replacing batteries.

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 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.

 Batteries that are replaced should be recycled.

5.4 Fan Maintenance

Check periodically that whether fans work properly and make sure air vents are not blocked. If a fan

stops running, maintain or replace it promptly.

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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. Phenomena Fault diagnosis and checking points Solution

AC/DC green

indicator on panel

is off.

The touch screen

displays wrong

phase sequence, the

buzzer beeps

continuously.

The inverter cannot

output normally,

and the buzzer

beeps continuously.

When mains power

outage, the UPS

halts with no

output.

Check if the mains switch is on and if the

fuse is OK.

Check if the mains input voltage is

during the rated range.

AC input phase is wrong

The rectifier is not completely started;

the buzzer beeps continuously and

battery low-voltage indicator is on;

battery input switch is not closed.

Output is overload; the LOAD overload

indicator on the panel is on.

Battery input switch is not opened;

check if battery return circuit alarms

abnormally.

——

Change the phase

sequence of rectifier’s

mains input wires.

Generally, it only needs

to change two phases

among L1, L2, L3.

Please wait that

rectifier finishes

starting and the buzzer

relieves long beep.

Decrease the load.

Close the battery

switch.

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NO. Phenomena Fault diagnosis and checking points Solution

The touch screen

and LED are off.

The red DC/AC

indicator is on, and

the buzzer beeps

continuously.

LOAD indicator is

on.

When power on

normally, it cannot

output normally.

Check if the bypass/ mains switch is

Please inform

professionals to

closed and the power board is fault.

maintain.

Get rid of the

short-circuit point,

Check if the load is short-circuit.

close the inverter, and

then restart the inverter.

Check if the fuse of inverter is fusing or

IGBT module is abnormal.

Check if the input mains is power

down, and the battery is under

low-voltage protection.

Replace the fuse or

IGBT module

It will start

automatically if the

mains normal.

The output of UPS is overload. Decrease the load.

Please inform

Check whether the bypass/inverter SCR

professionals to

drive board is fault.

maintain

The insert position of communication

wire is not proper.

The communication software is not

Communication

successful installed.

abnormal

The setting for computer’s

communication window is wrong.

Above problems are all eliminated, but

it still cannot normally communicate.

6.2 Deal with Common Faults

When starting the UPS, if the UPS cannot work normally, please refer to Table6-2 to look for reasons.

At the same time, please check if it is caused by environmental factors, such as temperature, humidity

not meeting the system’s requirements.

Insert the

communication wire

properly.

Install the software

correctly.

Properly set the

communication port.

Please inform

professionals to

maintain.

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Table6-2 only contains some simple troubleshooting. It the answer for diagnosis is not clear or not

After starting, the UPS can

normal, but once starting the

the result of short circuit. Common reason is that

→

load → small power load” after UPS running stably.

sufficient, please contact N1 Critical Technologies.

Table6-2 Troubleshooting

No. Phenomenon Possible reason

1 Mains is normal, but the UPS

works in battery inverting status,

buzzer beeps intermittently.

2 After installing, close switch or

power switch, the fuse will trip or

burn out.

output 110V AC power, but the

UPS works in bypass status.

4 After starting, the UPS output is

load, the UPS stops outputting

immediately.

The surfaced of a contact socket is bad, which leads to

AC input being blocked.

The input wires of UPS are wrongly connected, such as

the neutral wire and live wire or live wire and grounding

wire (cabinet) is reverse connected, or the three wires of

the output are wrongly connected.

The load capacity exceeds the rated output capacity. It

is necessary to decrease load or use a UPS with bigger

output capacity.

If it is a temporary bypass caused by starting the

load and can recover automatically, that is normal.

The UPS is overloaded or short-circuit of output return

circuit. Decrease the load to normal capacity or find out

output socket is short circuited.

The startup of load is not in the order of “big power

load

small power load”. It is necessary to restart the

UPS, and start the load in the order of “big power

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No. Phenomenon Possible reason

After starting, the UPS works

the UPS shuts down

In the status of battery supply power, the battery is

protected for low-voltage caused by discharging, the When mains normal, the UPS

outputs normally, when mains

failure, the UPS is without

normally, but some time later,

system shuts down automatically. The phenomenon is

automatically.

normal. Once the mains recover, the system will start

automatically and charge for the battery.

Warning: if the battery stays in low-voltage for a long

time, it will influence the life span of battery. After

low-voltage protection for battery, if the mains cannot

recover for long time, it is necessary to disconnect the

battery switch to protect the battery, and restart the

UPS when mains normal, and charge

for the battery.

6 After the UPS starts to work for a

while, the buzzer beeps

intermittently.

output.

8 The buzzer beeps continuously,

inverter fault and the UPS turn to

bypass status to supply power.

The voltage of grid is too low, and the UPS works in

battery inverting status, finally, it put the battery into

low-voltage protection.

Battery fault or the battery group is damaged.

Charger fault. The charging for battery fails, leading to

no battery power capability.

Battery wire connection is bad or the connection of

terminal is bad.

The battery switch is not closed.

After serious overload, the UPS is not restarted,

which causes the UPS always stay in bypass output

status.

Overload or output is short-circuiting, the UPS shuts

down to protect automatically.

Drive or power tube is fault.

Main controlling board is fault.

DC fuse is open-circuit.

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No. Phenomenon Possible reason

Under mains status, the UPS

9 There is mains, but the buzzer

beeps intermittently, mains

indicator is off.

works normally; however, after

power outage, the UPS work

normally but the device stops.

All the indicators on the panel

of the UPS are not lit on.

6.3 Emergency Troubleshooting

 Emergency for the fault of signal-unit

When the single-unit faults, it is necessary to close the power supply of UPS by OFF button on

the panel. If necessary, close the user load, and disconnect the input/output switch of UPS, which

is to avoid further damage of the UPS.

Voltage or frequency of mains exceeds the range of

UPS.

Bad grounding causes the float voltage between neutral

wire and grounding wire being too high.

The connection of display controlling board of the UPS

is bad or failure.

 Emergency for the fault of UPS 1 and UPS 2 in series backup system

When the UPS 1 of the series backup system fault, it is necessary to close the power supply of

UPS1 by OFF button on the panel. At the same time, disconnect the mains input switch and battery

switch of UPS 1 (UPS1 or battery cabinet). Inform the engineering technician to maintain.

When the UPS 2 fault, it is necessary to close the power supply of UPS2 by OFF button on the

panel. At the same time, disconnect the mains input switch and battery switch of UPS 2 (UPS2 or

battery cabinet). Inform the engineering technician to maintain.

 Emergency for the fault of the single-unit in parallel system

When the single-unit in parallel system fault, it is necessary to close the power supply of UPS by

OFF button on the panel. Then disconnect the switch of AC input, output and battery (UPS 1or

battery cabinet). Inform the engineering technician to maintain.

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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. The fuse fusing character and disjunction capacity of the

fuse used in input end, output end, battery input end of this series device are as follows:

Battery input: fuse 660GH/660V/315A, disjunction capacity: 100KA. The fusing characteristics are as

follows.

Mains input, bypass input, output: fuse 660GH/660V/400A, disjunction capacity: 100KA. The fusing

characteristics are as follows.

Charging end: fuse 660GH/660V/100A; disjunction capacity: 100KA. The fusing characteristics are as

follows.

Figure6-1 Fuse characters of fuse 660GH

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A Technical Specifications

If bypass is normal, it will track automatically and synchronously; if bypass failure the frequency is 50/60±0.1 of the UPS.

Model

Items

Voltage range (Vac)

Rectifier input frequency

range (Hz)

Bypass synchronization

tracking range (Hz)

Bypass input voltage range

Input

(V)

Input power factor (PF)

Input current harmonic

(THDI)

Phase 3φ4W+PE

Battery voltage (Vdc)

NE20L/NE20PL NE30L/NE30PL

208V

50/60±10%

50/60±5% （±10% optional）

+20%/+15%/-15%/-20%/-25%

＞0.99

<3%

167～224

Charging current (A) Can be set from 1 to 10.

Power 20kVA/18kW 30kVA/27kW

Phase 3φ4W+PE

Output

Output wave-form Sine wave

Voltage (Vac)

Frequency (Hz)

208±1%

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Three-phase phase difference

(ms)

only)

load, battery voltage, battery charging/ discharging current, etc.

equip with optional SNMP to realize intelligent monitoring of UPS.

voltage protection.

Items

Wave form distortion

Static bypass switch time

System efficiency

Parallel mode (“P” models

Overload capacity

Manual maintenance bypass

DC startup

Model

NE20L/NE20PL NE30L/NE30PL

≤2°

THD≤3% (linear load)

≥93％

No-master-slave self-adaptive parallel redundancy technology

130％ overload for 1 minute, 150％ overload for 10 seconds.

It possesses the maintenance bypass switch with no switch time.

Equipped

Touch screen display Three-phase input voltage, input frequency, three-phase output voltage,

LED display

Work status and alarm of UPS

Alarm function Input abnormal, battery under-voltage, over-voltage, and fault.

Other

Communication function It provides dry contact communication and RS232/RS485, and it also can

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.

Protection function

Output short-circuit protection, overload protection, over-temperature

protection, battery low-voltage protection, output over-voltage/low-

EMC

Noise（dB）

Meets GB7260.2

≤65 (1 meter)

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A Technical Specifications

Model

℃

temperature, it is necessary to place the UPS to normal operation

NE20L/NE20PL NE30L/NE30PL

Items

Cooling way Forced air cooling

Operation temperature (

Storage temperature

)

0-40º

-25

~+55℃. If the transporting and storage temperature exceed the work

temperature environment and keep it for at least 4 hours before installing

and powering on.

Altitude

The altitude should be no more than 1500 m, or it needs to decrease the

capacity according to GB/T 3859.2 to use.

Relative humidity 0~95%, with no condensation

Size (mm) (W×D×H) 500×800×1 500

Net weight（kg）

 Specifications are subject to change without notice.

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B Acronyms and Abbreviations

A AC Alternating Current

D DC Direct Current DSP Digital Signal Processor

E EMC Electromagnetic compatibility EPO Emergency Power Off ESD Electrostatic Discharge ESSD Electrostatic Sensitive Devices

L LCD Liquid Crystal Display LED Light-Emitting Diode

P PCB Printed Circuit Board

R RS232 Recommended Standard 232 RS485 Recommended Standard 485

S SNMP Simple Network Management Protocol

U UPS Uninterruptible Power Supply

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B Acronyms and Abbreviations