Emerson Adapt, iTrust Adapt, UHA3R-0200L User Manual

iTrust Adapt UPS 20kVA User
Manual

Emerson Network Power provides customers with technical support. Users may contact the nearest
Emerson local sales office or service center.

Copyright © 2010 by Emerson Network Power Co., Ltd.
All rights reserved. The contents in this document are subject to change witho ut notice.

Emerson Network Power Co., Ltd.
Address: No.1 Kefa Rd., Science & Industry Park, Nanshan District 518057, Shenzhen China
Homepage: www.emersonnetworkpower.com.cn
E-mail: [e-mail]

Safety Precauti

ons

This manual contains the information concerning the installation and operation of Emerson iTrust Adapt
/20kVA UPS (hereinafter referred to as UPS). Please

carefully read this manual prior to installation.
The UPS must be installed, commissioned and serviced by engineers designated by the manufacturer or its

agent. Failure to observe this could result in personnel safety risk, UPS malfunction and invalidation of warranty.
The UPS has been designed for commercial and industrial use only, and is not recommended for use in life

support applications.
This is a Class A UPS product. In a residential environment, this product may nevertheless cause radio

interference, in which case, the user may be required to take additional measures.

Conformity And Standards

The UPS complies with 2006/95/EC, 93/68/EEC (LV Safety) and 2004/108/EC (EMC), with Australia and New Zealand EMC
Framework (C-Tick) and with the following product standards for UPS:
* IEC62040-1-1: General and safety requirements for use in operator access area
* IEC62040-2: EMC requirements, Class C2 compliant
* IEC62040-3: Performance requirements and test methods
The UPS installation should follow the above instructions and use the accessories specified by manufacturer.

Warning: High Leakage Current

Earth connection is essential before connecting the input power (AC mains and battery included). This equipment must be
earthed in accordance with the local electrical codes.
Earth leakage current ranges from 3.5mA to 1000mA.
Transient and steady-state earth leakage currents, which may occur when starting the equipment, should be taken into
account when selecting instantaneous residual current circuit breaker (RCCB) or residual current detector (RCD).
RCCB must be selected, which is insensitive to DC unidirectional pulses (Class A) and transient current pulses.
Note that the earth leakage current of the load will be carried by RCCB or RCD.

Warning: Reflected Protection

The UPS has a zero-voltage contact closure signal available for use with an external automatic circuit breaker (single
power), to protect against backfeeding voltage to input terminal through the static bypass circuit. If the installation engineer
do not need to use this signal, the external bypass switchgear must be labelled to advise service personnel that the circuit is
connected to a UPS system.
The label can be written: ISOLATE THE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON THIS CIRCUIT.

Maintainable Components

All equipment internal maintenance and servicing procedures should be carried out only by trained personnel. Removal of
components behind the protective cover requires the use of a tool and is restricted to service personnel.
The UPS meets the safety requirements completely in operator access area. Only the service personnel can contact with the
hazardous voltage inside the UPS. However, the risk of contacting with these voltages is minimized as the components with
hazardous voltage may be contacted only uses a tool to remove the protective cover. No risk will exist if you follow the
general norms and in accordance with the procedures recommended in this manual on equipment operation.

Battery Voltage Above 400Vdc

Tools or keys must be used for all batteries maintenance, which should be carried out by trained personnel.
Battery use requires special care. After the battery is connected, the voltage of the battery terminal will exceed 400Vdc, and
physical contact would be fatal.
Battery manufacturer provides the precautions to be observed when working on, or in the vicinity of the battery string. These
precautions should be followed implicitly at all times. Particular attention should be paid to the recommendations concerning
local environmental conditions and the provision of protective clothing, first aid and fire-fighting facilities.

Contents

Chapter 1 Product Introduction ........................................................................................................................................... 1

1.1 Feat

ures

................................................................................................................................................................ 1

1.2 Model

Configuration

.............................................................................................................................................. 1

1.3 Appearance And

Components

.............................................................................................................................. 2

1.3.1

Appearance ...............................................................................................................................................

2

1.3.2

Components ..............................................................................................................................................

2

1.4 Operating Principle ............................................................................................................................................... 3

1.5 UPS State And Operation

Mode ...........................................................................................................................

3

1.5.1 Normal

Mode

............................................................................................................................................. 3

1.5.2 Bypass

Mode

............................................................................................................................................. 3

1.5.3 Battery

Mode .............................................................................................................................................

4

1.5.4 ECO Mode (For Single System Only) ........................................................................................................ 4

1.5.5 Fault

State .................................................................................................................................................

4

1.6 S

pec

ificati

ons

........................................................................................................................................................ 5

Chapter 2 Installation .......................................................................................................................................................... 6

2.1 Unpacking I

nspection

............................................................................................................................................ 6

2.2

Location ................................................................................................................................................................

6

2.2.1 Distribution

Room

...................................................................................................................................... 7

2.2.2 Battery

Room

............................................................................................................................................. 7

2.2.3 St

orage

...................................................................................................................................................... 7

2.3 Installation

tools ....................................................................................................................................................

7

2.4 Mechanical Installation.......................................................................................................................................... 8

2.4.1 Tower Installation ...................................................................................................................................... 8

2.4.2 Rack

Installation ........................................................................................................................................

9

2.5 External Protective

Device

.................................................................................................................................. 10

2.5.1 Rectifier And Bypass

Inputting.................................................................................................................

10

2.5.2 Battery

Input ............................................................................................................................................

11

2.5.3 UPS Output ............................................................................................................................................. 11

2.6 Connecting Power Cables .................................................................................................................................. 11

2.6.1 Cables Selection...................................................................................................................................... 11

2.6.2 Connecting I/O

Cables

............................................................................................................................. 12

2.6.3 Connecting Battery

Cables

...................................................................................................................... 17

2.7 Connecting Communication

Cables....................................................................................................................

18

2.7.1 Connecting Dry Contact Communication Cable ...................................................................................... 18

2.7.2 Connecting USB Communication

Cable

.................................................................................................. 19

2.7.3 Connecting SNMP Card Communication

Cable ......................................................................................

19

2.8 Parallel System ................................................................................................................................................... 20

2.8.1 Mechanical Installation ............................................................................................................................ 20

2.8.2 Setting Parallel A

ddresses

....................................................................................................................... 21

2.8.3 Connecting Parallel Cables ..................................................................................................................... 21

2.8.4 Connecting 1 + 1 Parallel POD

Cables....................................................................................................

22

2.9 Shared Batt

ery

.................................................................................................................................................... 22

2.10 Double Bus System .......................................................................................................................................... 23

2.10.1 System Installation ................................................................................................................................ 23

2.10.2 External Protective

Device.....................................................................................................................

23

2.10.3 Power

Cables ........................................................................................................................................

23

2.10.4 LBS Control

Cables

............................................................................................................................... 23

Chapter 3 Operation And Display P

ane

l............................................................................................................................ 24

3.1 Int

roduction

......................................................................................................................................................... 24

3.1.1 LED Indicat

ors

......................................................................................................................................... 24

3.1.2 Audible Alarm (B

uzzer)

............................................................................................................................ 24

3.1.3 Control Butt

ons

........................................................................................................................................ 25

3.1.4 LCD And Menu Butt

ons

........................................................................................................................... 25

3.2 LCD Screen T

ypes

.............................................................................................................................................. 25

3.2.1 Start S

creen

............................................................................................................................................. 25

3.2.2 Primary S

creen

........................................................................................................................................ 26

3.2.3 Default S

creen

......................................................................................................................................... 26

3.3 Detailed Description Of Menu Items ................................................................................................................... 27

3.4 Prompt Wi

ndow

................................................................................................................................................... 29

3.5 UPS Alarm Message List .................................................................................................................................... 29

Chapter 4 UPS Operation Inst

ructions

.............................................................................................................................. 32

4.1 UPS Start

-up

....................................................................................................................................................... 32

4.1.1 Normal Module Start-up P

rocedure

......................................................................................................... 32

4.1.2 Battery Module Start-up

Procedure .........................................................................................................

32

4.2 Transferring Procedures Between Operation

Modes

.......................................................................................... 32

4.2.1 Transferring From Normal Mode To Battery

Mode

.................................................................................. 32

4.2.2 Transferring From Normal Mode To Bypass

Mode..................................................................................

33

4.2.3 Transferring From Bypass Mode To Normal

Mode..................................................................................

33

4.2.4 Transferring From Normal Mode To Maintenance Bypass

Mode ............................................................

33

4.3 Complete Shutdown

Procedure ..........................................................................................................................

33

4.4 EPO P

rocedure

................................................................................................................................................... 34

4.5 Auto

Restar

t ........................................................................................................................................................ 34

4.6 UPS Reset P

rocedure

......................................................................................................................................... 34

4.7 Language

Selection ............................................................................................................................................

34

4.8 Changing Current Date And Time....................................................................................................................... 35

4.9 Controlling P

assword

.......................................................................................................................................... 35

Chapter 5 Maint

enance

..................................................................................................................................................... 36

5.1 Fan

Maintenance ................................................................................................................................................

36

5.2 Battery Maint

enance

........................................................................................................................................... 36

5.3 Cleaning UPS ..................................................................................................................................................... 36

5.4 Checking UPS

State ...........................................................................................................................................

36

5.5 Checking UPS F

unctions

.................................................................................................................................... 36

Appendix 1 Battery

Module ...............................................................................................................................................

38

Appendix 2 Optional Part List ............................................................................................................................................ 40

Chapter 1 Product Introduction

1

Chapter 1 Product Intr

oduction

iTrust Adapt and 20kVA UPS (UPS for short) is an intelligent online UPS system with sine wave output developed by
Emerson Network Power Co., Ltd. The UPS offers reliable and high quality AC power to your precision instrument.
The UPS adopts modular design, and rack/tower installation can be used depending on

your requirements

. It is
applicable to supplying AC power to small scale computer center, network, communication system, automatic control
system and precision instrument.

This chapter gives a brief description of the UPS, including the UPS features, model configuration, appearance,
components, operating principle, state, operation mode and specifications.

1.1 Features

iTrust Adapt UPS is compatible with iTrust Adapt 20kVA UPS. The UPS features include:

•

Compatible with two modes: 3-phase mains output and single-phase mains output. You should check the
system wiring and conduct the panel setting manually

•

Capable of parallel connection to achieve up to 3 + 1 parallel redundant power

•

High-frequency double conversion topology structure, with high input power factor, wide input voltage range, and
output immune to grid interference, thus adaptable to areas with unstable mains supply

•

High power density

•

Full digital control technology based on digital signal processor (DSP) to achieve high system reliability with
self-protection and fault diagnosis functions

•

Intelligent battery management to extend the battery module life

•

Operation and display panel with both LCD and LED indication to help you learn about the system operation
state and operating parameters

•

3U thickness. Tower installation and rack installation are optional to meet different installation requirements

•

Capable of ECO power supply mode, which helps you save energy to the maximum extent

•

Flexible network management with Emerson monitoring software

•

Fan fault self-test and automatic recognition functions

•

SNMP card optional, providing network communication function

•

Capable of connecting multiple battery strings, extending the power supply time of Battery mode

1.2 Model Configuration

The description of model configuration is shown in Table 1-1.

Table 1-1 Model configuration

Model

Description

UHA3R-0200L

For single and parallel 1 + 1 system, four battery modules are available; for parallel system above 1 + 1,
battery connection is required

2

Chapter 1 Product Introduction

iTrust Adapt UPS 20kVA User Manual

1.3 Appearance And Components

1.3.1 Appearance

The UPS appearance is shown in Figure 1-1.

Ventilation

holes

Operation

and

display panel

DIP switch, battery cold start

button

(with protective cover)

Figure 1-1 UPS appearance

Note

Non-authorized personnel are prohibited from opening the UPS chassis cover. Otherwise, electric shock may occur.

1.3.2 Components

Front panel
As shown in Figure 1-1, the UPS front panel provides ventilation holes, operation and display panel, DIP switch and

battery cold start button (with protective cover). The operation and display panel provides LCD, menu buttons, LED
indicators and control buttons. Refer to Chapter 3 Operation And Display Panel for details.

Rear panel
As shown in Figure 1-2, the UPS rear panel provides parallel ports, load bus synchronization (LBS) ports, dry contact

I/O port, SNMP card port, USB port, I/O terminal block and ventilation holes.

Parallel ports

LBS ports

I/O terminal block (with protective cover)

SNMP card

port

(with

protective cover)

Dry contact I/O port USB port

Ventilation

holes

Figure 1-2 UPS rear panel

Chapter 1 Product Introduction

3

1.4 Operating Principle

The operating principle of the UPS is shown in Figure 1-3.

Bypass

I/O filter

Rectifier/PFC

Inverter

Mains

DC/DC charger

Output

Battery

GND GND

Figure 1-3 Operating principle

1. The UPS is composed of mains input, I/O filter, rectifier/PFC, DC/DC charger, inverter, bypass, battery and UPS
output.

2. When the mains is normal, the rectifier will start, and the DC/DC charger will charge the battery string. Before
turning on the UPS, the output voltage is the bypass voltage. After turning on the UPS, the electronic transfer switch
connects the inverter output to the load, and the mains supplies DC power to the inverter through the rectifier/PFC
circuit. The inverter then converts DC power into pure sine wave AC power, and supplies AC power to the load
through the electronic transfer switch.

3. When the mains is abnormal, the rectifier/PFC circuit boosts the battery voltage and supplies it to the inverter. The
inverter then converts it into pure sine wave AC power, and supplies AC power to the load through the electronic
transfer switch.

4. After the mains returns to normal state, the UPS will automatically transfer from Battery mode to Normal mode, the
mains power supplies DC power to the inverter through the rectifier/PFC circuit, and then the electronic transfer
switch supplies DC power to the load.

1.5 UPS State And Operation Mode

The UPS state and operation mode include: Normal mode, Bypass mode, Battery mode, ECO mode and Fault state.
For the indicators introduced in this section, refer to Chapter 3 Operation And Display Panel.

1.5.1 Normal Mode

When the mains input is normal, the load is powered with voltage-stabilizing and frequency-stabilizing power by the
mains after processing of the rectifier and the inverter, and meanwhile, the operation mode that the charger charging
the battery is the Normal mode. In Normal mode, the inverter indicators are on (green).

1.5.2 Bypass Mode

If the overload overtime, inverter or rectifier failure appear during the UPS operation in Normal mode, the UPS will
transfer to Bypass mode, that is, the load is powered by the bypass source, which comes directly from the mains
input; if the rectifier is normal, the internal charger will charge the battery. In Bypass mode, the inverter indicators are
off.

Note

In the event of mains failure or mains voltage out of range in Bypass mode, the UPS will shut down and stop the output.

4

Chapter 1 Product Introduction

iTrust Adapt UPS 20kVA User Manual

Chapter 1 Product Introduction

5

1.5.3 Battery Mode

Upon mains failure, rectifier overload or mains voltage out of range, the rectifier and internal charger will become
inoperative, and the battery will supply power to the load through the inverter. The inverter indicators are on together
with buzzer alarming, which notifies you that the UPS is in Battery mode.

Note

1. The battery has been fully charged before delivery. However, transportation and storage will inevitably cause some capacity
loss. Therefore, it is required to charge the battery for eight hours before putting the UPS into operation, so as to ensure the
adequate stand time for battery.

2. The battery cold start can also be used to start the UPS from the Battery (charged) mode upon mains failure. Therefore, the
battery power can be used independently for improving the system availability to some extent.

1.5.4 ECO Mode (For Single System Only)

In ECO mode, the load is powered by bypass when the bypass voltage is normal, and the load is powered by inverter
when the bypass voltage is abnormal. ECO mode is an energy-saving operation mode. For some power equipment
that insensitive to power grid quality, you can use the ECO mode for power supply through bypass to reduce the
power loss.

Note

1. In ECO mode, if the bypass failure or abnormal bypass voltage appears when the output is not overloaded, the UPS will transfer
to Normal mode. However, if the bypass failure or abnormal bypass voltage appears when the output is overloaded, the UPS will
not transfer to Normal mode, but shut down the bypass.

2. In ECO mode, the efficiency of the UPS is up to 98%.

1.5.5 Fault State

In Normal mode, the UPS will transfer to Bypass mode if the inverter failure or UPS overtemperature appears. In
Battery mode, the UPS will shut down and stop the output if the inverter failure or UPS overtemperature appears. In
Fault state, the fault indicators will turn on, the buzzer will keep beeping, and the corresponding fault information will
be displayed on LCD panel.

Note

In Fault state, if the bypass failure or abnormal bypass voltage appears when the output is not overloaded, the UPS will shut down
and be transfered to the inverter for power supply, such as radiator overheat. However, if the bypass failure or abnormal bypass
voltage appears when the output is overloaded, the UPS will not be transfered to the inverter for power supply, but shut down the
bypass.

6

Chapter 1 Product Introduction

iTrust Adapt UPS 20kVA User Manual

1.6 Specifications

The UPS specifications are listed in Table 1-2.

Table 1-2 UPS specifications

Product model

UHA3R-0200L

Input

Rated voltage

3-phase: 380Vac

Voltage range

304Vac ~ 478Vac, at full load
228Vac ~ 304Vac, linear derating
228Vac, at half load

Rated frequency

50Hz/60Hz

Frequency range

40Hz ~ 70Hz

Power factor

≥0.99, at full load; ≥0.98, at half load

Output

Rated power

18kW

Voltage

220Vac ± 1% (3-phase balance load)

Frequency sync range

Rated frequency ± 2Hz (range is settable: ±0.5Hz ~ ±3Hz)

Frequency track rate

1Hz/s. Range is settable: 0.1Hz/s ~ 3Hz/s (single), 0.2Hz/s (parallel)

Rated power factor

0.9

Crest factor

3:1

Voltage harmonic

distortion

<2% (linear load), <5% (non-linear load)

Dynamic response

recovery time

60ms

Overload capacity

105% ~ 125%, 5min
125% ~ 150%, 1min

Bypass voltage

Upper limit: +10%, +15% or +20%; default: +15%
Lower limit: -10%, -20%, -30% or -40%; default: -20%

Mains efficiency

>93%, up to 94%

Battery

Type

Sealed, lead-acid, maintenance-free battery

Cell No.

30, 32, 34, 36, 38, 40

Rated voltage

360Vdc ~ 480Vdc

Charge power

4.5kW

Transfer time

Mains←→Battery

0ms

Inverter←→Bypass

Synchronous transfer: ≤1ms
Asynchronous transfer (default): ≤20ms
Or 40ms, 60ms, 80ms and 100ms are available

Noise

≤58dB

Panel display mode

LED and LCD

Safety

IEC/EN62040-1-1

EMC

Conduction emission

IEC/EN62040-2

Immunity

I≤16A

，

IEC/EN61000-3-3; 16A<I≤75A, IEC/EN61000-3-11

Harmonic current

I≤16A，IEC/EN61000-3-2; 16A<I≤75A, IEC/EN61000-3-12;
YD/T1095-2001, level 2

，

15%

Surge protection

IEC/EN-61000-4-5, enduration level 4 (4kV) (live line to earth), level 3 (2kV)
(during live lines)

Protection level

IP20

Ambient

condition

Operating temperature

0°C ~ +40°C

Storage temperature

-40°C ~ +70°C (battery excluded); -20°C ~ +55°C (battery included)

Relative humidity

5%RH ~ 95%RH, non-condensing

Altitude

<2000m; derating in accordance with GB/T3859.2 when higher than 2000m

Size

W × H × D

435mm × 130mm × 750mm

Weight

Net weight

35kg

Gross weight

38kg

iTrust Adapt UPS 20kVA User Manual

6

Chapter 2 Installation

Chapter 2 Installation

This chapter introduces the UPS installation. Each site has its peculiarity, so this chapter provides the guidance with
general installation procedures and methods for the installation engineer, who should conduct the installation
according to the actual conditi ons.

Warning: Professional Installation

The UPS equipment should be installed by a qualified engineer in accordance with the information contained in this chapter. If any
problem is found, please get in touch with Emerson local service center immediately.
Approved by the commissioning engineer, the UPS can be powered on.

Note: 3-phase 5-line for power input

The UPS can be connected to 3-phase 5-line (A, B, C, N, PE) TN, TT and IT AC power distribution system (IEC60364-3).

Warning: Battery Hazards

Special care should be taken into account when installing the battery. When connecting the battery, the voltage of the battery
terminal will exceed 400Vdc hazardous voltage.

•

Eyeshade should be worn to prevent injury from accidental electric arcs

•

Remove rings, watches and all metal objects

•

Use tools with insulated handles

•

Wear rubber gloves

•

If a battery leaks electrolyte, or is physically damaged, it must be replaced, stored in a container resistant to sulfuric acid and

disposed in accordance with local regulations

•

If your skin contacts with the electrolyte by accident, wash it immediately with water

2.1 Unpacking Inspection

After the UPS arrival, you should unpack it and check the following items:

1. Visually inspect the UPS appearance for transportation damage. If any problem is found, please notify the carrier
immediately.

2. Check the accessories and model against the delivery list. If any problem is found, please notify the dealer
immediately.

2.2 Location

To extend the UPS life, the selection of the UPS location should be:

•

Convenient wiring

•

Adequate operator access area

•

Well-ventilated location to meet the heat rejection requirement

•

Non-corrosive gas surrounded

•

No excessive moisture and heat sources

•

Free of dust

•

Compatible with fire-fighting requirements

•

Temperature of operation environment complies with the specifications, see Table 1-2 for details

Chapter 2 Installation

7

2.2.1 Distribution Room

The UPS is designed for indoor installation, which should be installed in clean and well-ventilated environment, so as
to keep the ambient temperature within the specifications range.

The internal fans provide the forced air cooling for the UPS. Cooling air enters the UPS through the front ventilation
holes, and exhausts the hot air through the back ventilation holes. Therefore, do not restrict the ventilation holes. The
front, rear and side panels of the UPS should be kept at least 200mm distance from the wall or consecutive
equipment, so as not to obstruct the UPS ventilation and heat rejection. Otherwise, the UPS internal temperature will
rise, which will shorten the UPS life.

If necessary, an indoor extractor fan should be installed to keep the indoor temperature from rising. An air filter should
be used where the UPS is to operate in a dirty environment.

Note

The UPS is only suitable for installing on the concrete surface or other non-flammable surfaces.

2.2.2 Battery Room

A small amount of hydrogen and oxygen will be generated at the end of battery charging, therefore, you must ensure
the fresh air ventilation of battery installation environment to meet the EN50272-2001 requirements.

The battery ambient temperature should be the constant temperature, for the ambient temperature is the main factor
to affect the battery capacity and life. The battery standard operating temperature is 20°C, operation above this
temperature will shorten the battery life, and operation below this temperature will reduce the battery capacity. If the
battery average temperature in operation rises from 20°C to 30°C, the battery life will be reduced by 50%; if the
battery temperature in operation exceeds 40°C, the battery life will be decreased exponentially. In general, the
enabled ambient temperature of the battery is 15°C ~ 25°C. The battery should be kept away from heat and
ventilation holes.

When the UPS uses an external battery, you must install a battery protective device (such as fuse or circuit breaker)
in areas near the battery, and use the shortest wiring distance for the protective device and battery connection.

2.2.3 Storage

The UPS must be stored indoors to protect against the excessive moisture or overtemperature environment, when
the UPS does not need to be installed immediately. The battery requires dry and low temperature, well-ventilated
environment for storage, and the most suitable storage temperature is 20°C ~ 25°C.

Warning: Battery Hazards

During the battery storage period, the battery must be periodically charged according to the battery instructions. You can connect
the UPS to the mains temporarily when charging the battery, so as to charge the battery for battery activation.

2.3 Installation tools

Prepare installation tools according to Table 2-1. The tools must be insulated and ESD-proof processed prior to

use

.

Table 2-1 Installation tools list

Installation tool

Specification

Application

Cross screwdriver

EJ5100mm

Remove the protective cover of terminal
block, connect power cables

Wire-pressure plier

YT-12

Press wires for terminal block

Diagonal plier

MTC3C

Make cables

iTrust Adapt UPS 20kVA User Manual

8

Chapter 2 Installation

2.4 Mechanical Installation

Note

The UPS is suitable for resistive-capacitive load (like computer), resistive load and micro-inductive load. It is not suitable for purely
inductive load or purely capacitive load (like motor, air-conditioner and duplicator), nor can it be connected to half-wave rectifier
load.

Two installation modes are available: tower installation and rack installation. You can select an appropriate installation
mode according to the actual conditions.

According to different configuration requirements, the UPS has two configurations: battery modules excluded, and
four battery modules. For tower installation, you should prepare the battery rack and battery cabinet for installing the
battery modules; for rack installation, the battery modules and the UPS can be installed in the same rack together.

2.4.1 Tower Installation

1. Assemble a pair of support bases (accessories) and a support base extension (accessory) together through
fastenings, as shown in Figure 2-1.

Support base

Fastening

Support base

extension

Figure 2-1 Connecting the support base with support base extension

2. Repeat step 1 to connect another pair of support bases with a support base extension.

3. Place the UPS on the support bases and support base extensions, as shown in Figure 2-2.

Support base

UPS

Support base

Figure 2-2 Installation complete

Note

For tower installation, two pairs of support bases should be placed respectively at both sides of the UPS, as shown in Figure 2-2.
Otherwise, the UPS may be dumped.

Chapter 2 Installation

9

2.4.2 Rack Installation

Installation procedures

for battery modules excluded

1. Take out eight M4*10 screws, and fix two brackets (accessories) respectively on both sides of the UPS front panel,
as shown in Figure 2-3.

UPS

Bracket (2 pcs)

Screw (8 pcs)

Figure 2-3 Installing brackets

Note

Moving the UPS through brackets is prohibited.

2. Place the UPS on the guide rails in the rack, and push it completely into the rack. Take out four M6*16 screws to fix
the UPS on the rack through brackets, as shown in Figure 2-4.

Guide

rail

Rack

UPS

Bracket

Screw (4 pcs)

Figure 2-4 Installing the UPS

Installation procedures

for battery modules included

The installation method of the battery module is the same as that of the UPS. Repeat the above procedures to install
and fix the four battery modules and UPS on the rack one by one. As the battery module is heavy, you should pay
attention to the following items in installation:

•

Two persons or more are required for the installation

•

Install the battery module, start the installation from the bottom, and then place the UPS onto the top, as shown
in Figure 2-5

•

Moving the UPS and battery modules through brackets is prohibited

iTrust Adapt UPS 20kVA User Manual

10

Chapter 2 Installation

UPS (1

piece)

Battery

module

(4

pcs)

Figure 2-5 UPS installation diagram of battery modules included

2.5 External Protective Device

The circuit breaker or other protective devices must be installed at the external AC input port of the UPS. This section
provides the general guidance for qualified installation engineer. The qualified installation engineer should learn about
the local wiring regulations for the equipment to be installed.

2.5.1 Rectifier And Bypass Inputting

Overcurrent
The appropriate overcurrent protective device should be installed on the mains input distribution, and the current

capacity of power cable and the system overload requirements should be taken into account in installation (see Table
1-2). It is generally recommended to use the thermomagnet circuit breaker of IEC60947-2 tripping curve C (normal),
when the current value reaches 125% of the current value listed in Table 2-2.

Split-bypass: When the system adopts split-bypass, the protective devices should be respectively installed at the
mains input distribution for mains and bypass.

Main/Bypass

reflected protection

When using the main/bypass reflected protection function, the gross mains input needs to be equipped with the
protective device with auxiliary contact function. The recommended model is S1N125 R125 TM FFC 4P + 1A + 1B +
YO (220Vac).

Note

The same neutral must be used for the rectifier and bypass power.
For IT power grid system, the protective device with four poles must be installed at the UPS external I/O distribution.

Earth leakage current
The residual current detector (RCD) for the UPS upstream input distribution should be:

•

Sensitive to the DC unidirectional pulse (level A) in distribution network

•

Insensitive to the transient current pulse

•

General sensitivity type, settable: 0.3A ~ 1A

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11

The residual current circuit breaker (RCCB) must be sensitive to the DC unidirectional pulse (level A) in distribution
network, but insensitive to the transient current pulse, as shown in Figure 2-6 respectively.

Figure 2-6 RCCB symbols

When using the earth RCD in split-bypass system or parallel system, the RCD should be located at the upstream
input distribution terminal to avoid generating the false alarm.

The earth leakage current introduced by the RFI filter in the UPS ranges from 3.5mA to 1000mA. It is recommended
to confirm the sensitivity of each differential device of the upstream input distribution and downstream distribution (to
load).

2.5.2 Battery Input

The overcurrent protective device has been placed into the battery module, when you choose the battery module
options provided by Emerson. Otherwise, the external battery cabinet should provide DC compatible circuit breaker,
so as to provide the overcurrent protection for the UPS and its batteries.

2.5.3 UPS Output

The protective device must be installed for the UPS output distribution. The protective device must be different from
the input distribution protection switches, and it also provides the overload protection (see Table 1-2).

2.6 Connecting Power Cables

I/O cables and battery cables are required for connection. Battery modules provide the battery cable options.
When designing the cables, you should follow the instructions in this section and the local wiring regulations, take the

environment situation into account, and refer to Table 3B of IEC60950-1.

Warning

1. Before carrying out the UPS wiring, ensure that you have learned about the location and state of the UPS input and mains
distribution switch. Make sure that the switches are in open state, and put up the warning mark to prevent the switches from
operating by others.

2. Failure to follow adequate earthing procedures can result in electromagnetic interference, electric shock hazard to personnel,
and risk of fire.

2.6.1 Cables Selection

Select the cables according to Table 2-2.

Table 2-2 Maximum steady state AC and DC current

UPS rated

power (kVA)

Rated current (A)

Mains input current

1, 2

upon battery

charging with Max ability

Gross output current

2

at full load

Battery discharging current upon

Min battery voltage

380V

400V

415V

380V

400V

415V

20 (3-in 3-out)

36

36

36

30

29

28

67

20 (3-in 1-out)

36

36

36

90

87

84

67

Note:

1. The mains current input of the rectifier and bypass.

2. Non-linear load (switch mode power) affects the neutral cable design of output and bypass. The neutral cable current may
exceed the rated phase current, in general, 1.732 times the rated current

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1. PE line: Use the shortest wiring route when connecting the cabinet earth cable. The cross sectional area (CSA) of
the earth cable should be selected according to the AC power fault level, cable length and protection type. From

AS/IE

C60950-1，the CSA is 10mm2 (20kVA, 3-in 3-out), 25mm2 (20kVA, 3-in 1-out) as usual.

2. When selecting the battery cables, according to the current value shown in Table 2-2, the Max allowable voltage
drop is 4Vdc. Do not ring the cables, so as to avoid increasing the electrical magentic interference (EMI).

2.6.2 Connecting I/O Cables

Distribution

mode and terminal block

1. Distribution mode
There are two modes for UPS distribution: single power output distribution (POD) unit options provided by Emerson,

external distribution by the user.
According to the actual requirements, the I/O cable connections are divided into four types: 3-in 3-out,

common

source

configuration (factory default), 3-in 3-out, split-bypass configuration, 3-in 1-out, common source configuration,
3-in 1-out, split-bypass configuration. In accordance with the four types of the two distribution methods, this section
will introduce the I/O cables connection procedures respectively.

Note

This product is compatible with 3-in 3-out/3-in 1-out, factory default: 3-in 3-out. Change the format according to the following steps,
if you need the 3-in 1-out system:

1. After the 3-in 1-out I/O connections are finished by following the instructions in this section, power on the system, then press the
emergency power off (EPO) button immediately.

2. Set the system to ‘Single Phase Output’ through the LCD menu ‘Settings’ -> ‘3-in 3-out/3-in 1-out’.

3. Power off the system completely, then power it on again, the system will run in 3-in 1-out mode.

2. Terminal block
The power cables connection of the UPS should be connected through the I/O terminal block located on the UPS rear

panel. Figure 2-7 gives the terminals distribution of the I/O terminal block.

Bat

+

Bat -

oN

oA oB oC

Bat N

PE

mN bN mA bA mB bB mC bC

3

3

3

3

Note: 1. Main input: mA, mB, mC, mN; Bypass input: bA, bB, bC, bN

Output: oA, oB, oC, oN; Battery: Bat +, Bat N, Bat -; GND: PE

2. In factory, four shorted copper bars 3 have been used to short terminals between mA and bA,
mB and bB, mC and bC, mN and bN respectively

Figure 2-7 Terminals distribution of the I/O terminal block

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13

When using the single POD options, the UPS power cables should be connected through the user terminal block, UPS
terminal block and PE terminals of the single POD rear panel. The terminal distribution of each terminal block on
the POD rear panel and PE terminals are shown in Figure 2-8.

User terminal

block

oN oN oA oB oC

3 3 3 3

mN bN mA bA

mB

bB mC bC

PE PE

oN oN oA oB oC mN bN mA bA mB bB mC bC

PE PE

UPS terminal

block

Note: 1. Main input: mA, mB, mC, mN; Bypass input: bA, bB, bC, bN

Output: oA, oB, oC, oN; Battery: Bat +, Bat N, Bat -; GND: PE

2. In factory, four shorted copper bar s 3 have been used to short terminals between mA and bA,
mB and bB, mC and bC, mN and bN respectively

Figure 2-8 Terminals distribution of the terminal blocks and PE terminals

The UPS I/O terminal block, the single POD user terminal block and UPS terminal block all have protective covers.
Before the connection, you should remove the protective cover of each terminal block; after the connection, you
should reinstall these protective covers.

Warning

After the cables connection, you must reinstall the protective cover of each terminal block, so as to avoid the electric shock when
the UPS is in operation state.

Single POD

options

(Recommended)

•

3-in 3-out, common source configuration (factory default)

1. Connect the live line (input phase A, input phase B and input phase C), N line and PE line respectively to the user
terminal block (mA, mB, mC and mN terminals) and PE terminals of the single POD.

2. Connect the live line (output phase A, output phase B and output phase C), N line and PE line respectively to the
user terminal block (oA, oB, oC and oN terminals) and PE terminals of the single POD.

3. Remove all the shorted copper bars 3 from the UPS I/O terminal block, connect the UPS terminal block of the
single POD with the same silkprint terminal of the UPS I/O terminal block using one-to-one correspondence method,
and connect two PE terminals of the UPS I/O terminal block to the single POD PE terminals.

•

3-in 3-out, split-bypass configuration

1. Remove all the shorted copper bars 3 from the single POD user terminal block.

2. Connect the live line (mains phase A, mains phase B and mains phase C), N line and PE line respectively to the
user terminal block (mA, mB, mC and mN terminals) and PE terminals of the single POD.

3. Connect the live line (bypass phase A, bypass phase B and bypass phase C), N line and PE line respectively to
the single POD user terminal block (bA, bB, bC and bN terminals).

4. Connect the live line (output phase A, output phase B and output phase C) and N line respectively to the single
POD user terminal block (oA, oB, oC and oN terminals).

5. Remove all the shorted copper bars 3 from the UPS I/O terminal block, connect the UPS terminal block of the
single POD with the same silkprint terminal of the UPS I/O terminal block using one-to-one correspondence method,
and connect two PE terminals of the UPS I/O terminal block to the single POD PE terminals.

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•

3-in 1-out, common source configuration

Note

Except for the shorted copper bar 3, all the shorted copper bars mentioned in the installation procedures are the delivery
accessories.

1. Short bA, bB and bC terminals of the single POD user terminal block using the shorted copper bar 7, short oA, oB
and oC terminals using the shorted copper bar 5, and short mA and bA terminals using the shorted copper bar 6, then
short mN and bN terminals, two oN terminals respectively using two shorted copper bars 4, as shown in Figure 2-9.

7

4

5

4

6

8

oN oN oA oB oC mN bN mA bA mB bB mC bC

PE PE

oN oN oA oB oC mN bN mA bA mB bB mC bC

PE PE

Figure 2-9 Shorted copper bars connection for single POD user terminal block

2. Connect the shorted copper bar 8 to one end of the shorted copper bar 7 (see Figure 2-9), and connect the live line
(input phase A) to the shorted copper bar 8.

3. Connect the live line (input phase B and input phase C), N line and PE line respectively to the user terminal block
(mB and mC terminals), shorted copper bar 4 of mN and bN terminals, and PE terminals of the single POD.

4. Connect the live line (output phase A), N line and PE line respectively to the shorted copper bar 5 of the user
terminal block, shorted copper bar 4 of two oN terminals, and PE terminals of the single POD.

5. Remove all the shorted copper bars 3 from the UPS I/O terminal block, and connect the UPS terminal block of the
single POD with the same silkprint terminal of the UPS I/O terminal block using one-to-one correspondence method.

6. As shown in Figure 2-10, you can paste the insulating film (accessory) to the shorted copper bar 10, and insert the
buckles into the corresponding holes on the shorted copper bar 10.

Shorted copper

bar 10

Buckle

Insulating film

Assembling

Completed status

Figure 2-10 Pasting the insulating film to the shorted copper bar 10

7. As shown in Figure 2-11, you can short two PE terminals of the UPS I/O terminal block using the shorted

copper

bar

10 with an insulating film, and connect two screw holes of the shorted copper bar 10 to PE terminals of the single

POD.

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15

PE

10

Figure 2-11 Shorted copper bar 10 for PE terminals of the UPS I/O terminal block

•

3-in 1-out, split-bypass configuration

1. Short bA, bB and bC terminals of the single POD user terminal block using the shorted copper bar 7, short oA, oB
and oC terminals using the shorted copper bar 5, and then short mN and bN terminals, two oN terminals respectively
using two shorted copper bars 4, as shown in Figure 2-12.

7

4

5

4

8

oN oN oA oB oC mN bN mA bA

mB

bB mC bC

PE PE

oN oN oA oB oC mN bN mA bA mB bB mC bC

PE PE

Figure 2-12 Shorted copper bars connection for single POD user terminal block

2. Connect the live line (mains phase A, mains phase B and mains phase C), N line and PE line respectively to the
user terminal block (mA, mB and mC terminals), shorted copper bar 4 of mN and bN terminals, and PE terminals of
the single POD.

3. Connect the shorted copper bar 8 to one end of the shorted copper bar 7 (see Figure 2-12), and connect the live
line (bypass phase A) to the shorted copper bar 8.

4. Connect the bypass N line to the shorted copper bar 4 of of the single POD user terminal block (mN and bN
terminals).

5. Connect the live line (output phase A), N line and PE line respectively to the shorted copper bar 5 of the user
terminal block, shorted copper bar 4 of two oN terminals, and PE terminals of the single POD.

6. Remove all the shorted copper bars 3 from the UPS I/O terminal block, and connect the UPS terminal block of the
single POD with the same silkprint terminal of the UPS I/O terminal block using one-to-one correspondence method.

7. As shown in Figure 2-10, you can paste the insulating film (accessory) to the shorted copper bar 10, and insert the
buckles into the corresponding holes on the shorted copper bar 10.

8. As shown in Figure 2-11, you can short two PE terminals of the UPS I/O terminal block using the shorted

copper

bar

10 with an insulating film, and connect two screw holes of the shorted copper bar 10 to PE terminals of the single

POD.
Self-distribution

Before carrying out the self-distribution, you should prepare the protective devices such as the mains miniature circuit
breaker (MCB), bypass MCB, output MCB and maintenance MCB. It is recommended to use the 63A mains MCB,
125A bypass MCB, and 100A output MCB.

•

3-in 3-out, common source configuration (factory default)

1. Connect the live line (input phase A, input phase B and input phase C), N line and PE line respectively to the I/O
terminal block (mA, mB, mC and mN terminals) and PE terminals of the UPS.

2. Connect the live line (output phase A, output phase B and output phase C), N line and PE line respectively to the
I/O terminal block (oA, oB, oC and oN terminals) and PE terminals of the UPS.

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•

3-in 3-out, split-bypass configuration

1. Remove all the shorted copper bars 3 from the UPS I/O terminal block.

2. Connect the live line (mains phase A, mains phase B and mains phase C), N line and PE line respectively to the
I/O terminal block (mA, mB, mC and mN terminals) and PE terminals of the UPS.

3. Connect the live line (bypass phase A, bypass phase B and bypass phase C), N line and PE line respectively to bA,
bB, bC and bN terminals of the UPS I/O terminal block.

4. Connect the live line (output phase A, output phase B and output phase C), N line and PE line respectively to the
I/O terminal block (oA, oB, oC and oN terminals) and PE terminals of the UPS.

•

3-in 1-out, common source configuration

1. As shown in Figure 2-10, you can paste the insulating film (accessory) to the shorted copper bar 10, and insert the
buckles into the corresponding holes on the shorted copper bar 10.

2. As shown in Figure 2-13, you can short two PE terminals of the UPS I/O terminal block using the shorted copper
bar 10 with an insulating film, short bA, bB and bC terminals using the shorted copper bar 7, short oA, oB and oC
terminals using the shorted copper bar 5, and short mA and bA terminals using the shorted copper bar 6 and then
short mN and bN terminals, two oN terminals using two shorted copper bars 4.

oN

oA oB oC

PE

mN

bN mA bA bB

bC

7

6

8

4 5 10

4

Figure 2-13 Shorted copper bars connection for UPS I/O terminal block

3. Connect the shorted copper bar 8 to one end of the shorted copper bar 7 (see Figure 2-13), and connect the live
line (input phase A) to the shorted copper bar 8.

4. Connect the live line (input phase B and input phase C), N line, PE line respectively to the I/O terminal block (mB
and mC terminals), shorted copper bar 4 of mN and bN terminals, and one screw hole of shorted copper bar 10 of the
UPS.

5. Connect the live line (output phase A), N line and PE line respectively to the shorted copper bar 5 of the I/O
terminal block, shorted copper bar 4 of two oN terminals and the other screw hole of shorted copper bar 10 of the
UPS.

•

3-in 1-out, split-bypass configuration

1. As shown in Figure 2-10, you can paste the insulating film (accessory) to the shorted copper bar 10, and insert the
buckles into the corresponding holes on the shorted copper bar 10.

2. Short two PE terminals of the UPS I/O terminal block using the shorted copper bar 10 with an insulating film, short
bA, bB and bC terminals using the shorted copper bar 7, and short oA, oB and oC terminals using the shorted copper
bar 5, and then short mN and bN terminals, two oN terminals using two shorted copper bars 4, as shown in Figure
2-14.

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17

oN

oA oB oC

PE

mN

bN bA

bB

bC

7

4 5

10 4

8

Figure 2-14 Shorted copper bars connection for UPS I/O terminal block

3. Connect the live line (mains phase A, mains phase B and mains phase C), N line, PE line respectively to the I/O
terminal block (mA, mB and mC terminals), shorted copper bar 4 of mN and bN terminals, and one screw hole of the
shorted copper bar 10 of the UPS.

4. Connect the shorted copper bar 8 to one end of the shorted copper bar 7 (see Figure 2-14), and connect the live
line (bypass phase A) to the shorted copper bar 8.

5. Connect the bypass N line to the shorted copper bar 4 of mN and bN terminals of the UPS I/O terminal block.

6. Connect the live line (output phase A), N line and PE line respectively to the shorted copper bar 5, shorted copper
bar 4 of two oN terminals, and the other screw hole of shorted copper bar 10 of the UPS I/O terminal block.

Warning

Before the commissioning engineer arrival, if the load is not ready for accepting the power, please take good care of the safety
insulation located at the end of the output cable.

After the I/O cables connection, you should find the label shown in Figure 2-15 on the UPS chassis protective cover
for convenient maintenance, and then tick ‘√’ at the right side of ‘OUTPUT’ and ‘BYPASS’, according to the actual
conditions.

Figure 2-15 Label

2.6.3 Connecting Battery Cables

Note

If the battery module is not selected, this product needs to be equipped with positive and negative batteries. Each battery string
ranges from 15-cell to 20-cell, and 12V for each cell.

Connection procedures for battery cables are as follows:

1. Confirm that all UPS external I/O switches are open.

2. Connect the battery cables.

•

Selected battery modules (4 pcs)

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SALARM

GND

On_battery

GND

On_bapass

GND

Epo_NC

+12V

+12V

Epo_IN

BFP_o

BFP_s

BFP_c

1) Take out the UPS options and select battery cables, insert the battery cables marked with ‘Battery Module 1’,
‘Battery Module 2’, ‘Battery Module 3’ and ‘Battery Module 4’ respectively into any battery port on the rear panel of
the four battery modules (see Figure 2).

2) Ground one end of the battery cable marked with ‘UPS PE’.

3) Connect the other end of the battery cables marked with ‘BAT +’, ‘BAT N’, ‘BAT -’ respectively to ‘Bat +’, ‘Bat N’,
‘Bat -’ terminals of the UPS I/O terminal block (see Figure 2-7).

4) Tighten the fixing screws on both battery port sides of the battery module through screwdriver, so as to prevent the
battery cable from loosing or coming off.

•

Non-selected battery

modules

Connect the external battery with terminals ‘+’, ‘N’ and ‘-’ respectively to ‘Bat +’, ‘Bat N’ and ‘Bat -’ terminals of the
UPS I/O terminal block (see Figure 2-7).

Note

1. It is prohibited to reverse the positive pole and negative pole of the battery.

2. Before replacing the battery module and connecting the battery cables, ensure that the UPS system is in maintenance mode.

3. The length of the battery cable option is 1.5m. If you need more length cables, please consult the dealer. It is recommended that
the battery cable be shorter than 3m. Otherwise, the UPS cannot operate normally.

2.7 Connecting Communication Cables

Communication cables include: dry contact communication cable, USB communication cable and SNMP card
communication cable.

All communication cables are the dual insulation cables which must be separated from the power cables for wiring.
When the longest connection distance ranges from 25m to 50m, the CSA should be ranged from 0.5mm2 to 1.5mm2.

2.7.1 Connecting Dry Contact Communication Cable

The UPS provides five dry contact ports, see Figure 1-2 for specific positions. The silkprints of the five dry contact
ports are 1, 2, 3, 4, 5. The pin distribution of each dry contact port is shown in Figure 2-16, and the port description is
shown in Table 2-3.

+12V

Dry contact port 1

Dry contact port 2 Dry contact port 3

Dry contact port 4 Dry contact port 5

Figure 2-16 Pin distribution of dry contact ports

Table 2-3 Description of the dry contact ports

Silkprint

Port name

Pin NO.

Pin name

Meaning

1

Output port of alarm

1.1

S_ALARM

The signal level is 12V, when the system alarms

1.2

GND

GND

2

Output port of battery
status

2.1

ON_BATTERY

The signal level is 12V, when the system runs in battery
inversion mode

2.2

GND

GND

3

Output port of bypass
status

3.1

ON_BYPASS

The level is 12V, when the system runs in bypass mode

3.2

GND

GND

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19

Silkprint

Port name

Pin NO.

Pin name

Meaning

4

Input port of remote
EPO *

4.1

EPO_NC

EPO activated, when opened to 4.2

4.2

+12V

EPO activated, when opened to 4.1

4.3

+12V

EPO activated, when shorted to 4.4

4.4

EPO_IN

EPO activated, when shorted to 4.3

5

Output port of bypass
reflected

5.1

BFP_O

Bypass reflected protection relay (normally open), the bypass
silicon controlled rectifier (SCR) will close when short circuit
appears

5.2

BFP_S

The middle point of the bypass reflected protection relay

5.3

BFP_C

Bypass reflected protection relay (normally open), the bypass
SCR will open when short circuit appears

Note*: Pin1 and pin2, or pin3 and pin4 of the dry contact port 4 reserves the corresponding terminals for configuring the EPO
function. The external EPO device also needs the shielded cable to connect to the normally open/close remote EPO switch
between the two terminals. If not necessary, you should disconnect pin3 and pin4 of the dry contact port 4, or short pin1 and pin2
of the dry contact port 4. Pin1 and pin2 of the dry contact port 4 have been shorted before delivery

Note

The EPO action of the UPS will close the rectifier, inverter and static bypass, but it can not disconnect the UPS mains input inside.
If you want to disconnect the UPS completely, just disconnect the upstream input switch when generating the EPO,.

2.7.2 Connecting USB Communication Cable

Insert one end of the USB communication cable accessory into the USB port on the UPS rear panel (see Figure 1-2),
and insert the other end of the USB communication cable into the computer USB port.

2.7.3 Connecting SNMP Card Communication Cable

The UPS provides the installation communication components of the SNMP card port (see Figure1-2), including:
SNMP card, dry contact card and MODBUS card. For the installation and usage of the communication components,
refer to the delivered documentation of each communication component. SNMP card port and USB port can be used
together.

The pin distribution of each SNMP card port is shown in Figure 2-17.

GND_SNMP

SNMPSIG

+9_SNMP

RXD_SNMP
TXD_SNMP

RXD232
TXD232

+9_TR

1

2
3

4
5

6
7
8

9

10

14 PIN

Figure 2-17 Pin distribution of SNMP card ports

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The pin description of each SNMP card port is shown in Table 2-4.

Table 2-4 Pin description of SNMP card ports

Pin

Description

1, 9

GND of SNMP card

2

SNMP card power prov ided by DSP panel

3

Signal from the SNMP card, which connects with RXD of the DSP

4

Signal to SNMP card, which connects with TXD of the DSP

5

Connect with RX of the RS232 communication port of the host

6

Connect with TX of the RS232 communication port of the host

7

Reserved

8

Selected communication signal, +9_TR is introduced into this pin after the SNMP card is plugged

10

The power supplied by DSP panel, for selecting the card

Note

If you wish to connect the SNMP card (model: UF-SNMP810) to Emerson temperature sensor (model: RDU-A-S01T) to make it be
the battery temperature compensation, please connect the COM1 port of the SNMP card, and set the temperature sensor DIP
address to ‘1’.

Warning

The DIP switch on the UPS front panel (see Figure1-1) is used to set the parallel address for each UPS single in parallel system
installation. You are not required for setting the DIP switch in UPS single system installation. Set the DIP switch at will can result in
UPS fault!

2.8 Parallel System

The UPS parallel system provides the user with N + X (2≤N + X≤4) parallel configuration, N stands for the basic
parallel sets, X stands for the redundant sets.

The UPS parallel system has 1 + 1 parallel POD options, which can provide safe and reliable distribution function for
parallel system. The 1 + 1 parallel system only needs one 1 + 1 parallel POD; if N≥2, the self-distribution will be
required for the parallel system.

Parallel system installation includes:

•

Mechanical installation

•

Setting parallel addresses

•

Parallel cables connection

•

1 + 1 parallel POD cables connection

2.8.1 Mechanical Installation

Taking the rack installation of the 1 + 1 parallel system including battery module for example, the mechanical
installation method of the parallel system is as follows:

1. The installation method of 1 + 1 parallel POD is the same as that of the UPS. Refer to 2.4.2 Rack Installation for
details.

2. As shown in Figure 2-18, the battery module should be installed at the bottom, the UPS should be installed in the
middle, and the 1 + 1 parallel POD should be installed on the top, so as to facilitate the cable connection and
operation.

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21

1 + 1 parallel POD (1 piece)

UPS (2

pcs)

Battery module (4 pcs)

Figure 2-18 1 + 1 parallel system including battery modules

2.8.2 Setting Parallel Addresses

The parallel addresses for all the UPS singles in parallel system should be set. The parallel addresses can be set
through the DIP switch on the UPS front panel (see Figure 1-1). Remove the DIP switch protective cover, and set the
DIP switch according to Table 2-5. The parallel address must be unique for each UPS singl e.

Table 2-5 DIP switch settings

Parallel addresses Parallel 1# Parallel 2# Parallel 3# Parallel 4#

DIP switch position

ON

DIP1 DIP2 DIP3 DIP4 DIP5

ON

DIP1 DIP2 DIP3 DIP4 DIP5

ON

DIP1 DIP2 DIP3 DIP4 DIP5

ON

DIP1 DIP2 DIP3 DIP4 DIP5

Warning

The default setting for DIP switch is’1’, you can set the DIP switch to 2, 3 or 4. However, you should set the DIP switch position
according to the description listed in Table 2-5. Otherwise, the UPS fault will occur!

2.8.3 Connecting Parallel Cables

The parallel system provides the parallel cable options. Through the parallel ports (see Figure 1-2) on the UPS rear
panel, the parallel cables are connected in close-loop mode one by one. Taking the 3 + 1 parallel system for example,
the schematic diagram of the parallel cables connection is shown in Figure 2-19.

UPS1 UPS2 UPS3

UPS4

Parallel cable Parallel cable

Parallel

port 1

P

arallel

port 1

Parallel

port 1

Parallel

port 1

Parallel cable

Parallel

port 2

Parallel

port 2

Parallel

port 2

Parallel

port 2

Parallel cable Parallel

cable

Figure 2-19 Parallel cables connection schematic diagram (3 + 1 parallel system)

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2.8.4 Connecting 1 + 1 Parallel POD Cables

Connecting 1 + 1 parallel POD cables includes: connecting cables between the UPS and 1 + 1 parallel POD and
connecting input and output cables of the 1 + 1 parallel POD.

Connecting

cables between the UPS and 1 + 1 parallel POD

Connect the UPS1 terminal block (silkprint: UPS1) on the 1 + 1 parallel POD rear panel to the same silkprint terminal
on the UPS1＃ rear panel I/O terminal block using the one-to-one correspondence method. Connect the UPS2
terminal block (silkprint: UPS2) on the 1 + 1 parallel POD rear panel to the same silkprint terminal on the UPS2＃

rear panel I/O terminal block using one-to-one correspondence method.

Note

1. When connecting cables, connect the UPS end at first, and then connect the 1 + 1 parallel POD end.

2. For kinds of system connection differences such as 3-in 3-out (common source configuration), 3-in 3-out (split-bypass
configuration), 3-in 1-out (common source configuration), 3-in 1-out (split-bypass configuration), refer to 2.6.2 Connecting I/O
Cables.

Connecting

I/O cables of the 1 + 1 parallel POD

Note

1. An upstream protective MCB must be series connected between the 1 + 1 parallel POD and the mains. It is recommended to
use 80A MCB in mains and 150A MCB in bypass.

2. Confirm reliable connection for the earth cable.

1. Connect the input cables.

•

For 3-in 3-out parallel system, connect the input cables (U, V, W, N, PE) respectively to the corresponding

terminals on the user terminal block (silkprint: USER) of the 1 + 1 POD rear panel.

•

For 3-in 1-out parallel system, connect the input cables (L, N, PE) respectively to the corresponding terminals on

the user terminal block of the 1 + 1 POD rear panel.

2. Connect the output cables.
Connect one end of the output cable to the user terminal block of the 1 + 1 parallel POD, and connect the other end

of the output cable to the load.

2.9 Shared Battery

All the UPS singles in parallel system not only can share the battery string, but also can use the battery string
independently. The use of the shared battery in parallel system can save money for you.

The following section will introduce the wiring and setting operation of the shared battery in parallel system.

Note

Each UPS single should be equipped with the independent battery MCB. Refer to Table 2-2 and voltage of battery string for
battery MCB type.

1. Wiring: Power off the system completely and disconnect all battery MCBs of the UPS single, and then connect ‘+’,
‘N’ and ‘-’ terminals of the shared battery respectively to ‘Bat +’, ‘Bat N’ and ‘Bat -’ terminals (see Figure 2-7) of the
corresponding UPS single I/O terminal block in parallel syste m, through each battery MCB.

2. Setting: Power on the system, set each UPS single to shared battery configuration through the LCD menu

‘Settings’ -> ‘Shared Battery’ from each UPS single; set the LCD menu ‘Settings’ -> ‘Battery Cells Number’ and
‘Single Group Batt Cap’ from each UPS single, and each single setting must be the same.

Chapter 2 Installation

23

Note

When the parallel system uses the shared battery, the ‘Single Group Batt Cap’ of the LCD setting of each UPS single stand s for

the gross capacity of battery string, and each single can calculate the battery capacity itself automatically.

3. Close the battery MCB of each single.

2.10 Double Bus System

2.10.1 System Installation

The double bus system is composed of two independent UPS system, and each UPS system can be composed of
one or two parallel UPS singles. The double bus system has high reliability, which is suitable for the load with many
input terminals. For single input load, you can add a selected static trigger switch (STS) to start the load bus
synchronization (LBS).

The double bus system uses LBS to realize the output sync of the two independent (or parallel) UPS systems. One is
the main system, and the other is the slave system. The operation mode of the double bus system contains main
system and/or slave system for running in Normal or Bypass mode. The typical double bus system is shown in Figure
2-20.

Rectifier input

UPS1

Bypass

UPS2

Rectifier input

Rectifier input

UPS1

Bypass

UPS2

Rectifier input

Parallel

control

cable

LBS

Parallel
control

cable

STS

Load

connection

Figure 2-20 Typical double bus system (with the STS and LBS)

2.10.2 External Protective Device

See 2.5 External Protective Device.

2.10.3 Power Cables

See 2.6 Connecting Power Cables.

2.10.4 LBS Control Cables

Just connect the LBS cables respectively to any two LBS ports (see Figure 1-2) of the two parallel systems.

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24

Chapter 3 Operation And Display Panel

Chapter 3 Operation And Display

Panel

This chapter introduces the functions and use of the compon ents on the UPS operation and display panel, and
provides LCD display information, including the LCD screen types, detailed menu messages, prompt windows and
UPS alarm message list.

3.1 Introduction

The operation and display panel is located on the front door of the UPS. Through the operation and display panel,
you can conduct the UPS operation control and query all the UPS parameters, UPS and battery states, and alarm
message.

As shown in Figure 3-1, the operation and display panel provides LCD, menu buttons (F1 ~ F

4、H

ELP

)、LED

indicators (inverter indicator and fault indicator ), control buttons (FAULT CLEAR, ON, OFF, ALARM CLEAR, EPO).

LCD

Fault

indicator

Menu buttons

Control

buttons

Inverter indicator

Figure 3-1 Operation and display panel

3.1.1 LED Indicators

The LED indicators are composed of inverter indicator and fault indicator. Table 3-1 gives the indicators

description

.

Table 3-1 Description of LED indicators

LED

Color

State

Meaning

Inverter indicator

Green
Steady green

Load power is supplied by the inverter

Blinking green

Inverter on, starting up, synchronizing, or standing by (ECO mode)

Off

Inverter not operating

Fault indicator

Red
Blinking red

General fault (such as no battery)

Steady red

Serious fault (such as inverter fault)

Off

No fault

3.1.2 Audible Alarm (Buzzer)

The UPS activity is accompanied with the following two different kinds of audible alarms shown in Table 3-2.

Table 3-2 Audible alarm description

Sound

Meaning

One beep every second

Sound is generated when the UPS alarm appears, such as AC input failure

Continuous beep

Sound is generated when the UPS fault appears, such as fuse or hardware failure

Chapter 3 Operation And Display Panel

25

3.1.3 Control Buttons

The operation and display panel provides five control buttons, which functions are described in Table 3-3.

Table 3-3 Description of control buttons

Control button

Silkprint

Description

EPO switch

EPO

Used to disconnect the load power and close the rectifier, inverter, static
bypass and battery

Inverter on

ON

Used to start the inverter

Inverter off

OFF

Used to close the inverter

Fault recovery on/off

FAULT CLEAR

Recover the UPS function (clear fault in advance)

Alarm sound silence
on/off

ALARM CLEAR

When an audible alarm is active, press this button to silence the audible
alarm. Press this button again can restart the buzzer

3.1.4 LCD And Menu Buttons

The operation and display panel provides an LCD and five menu buttons (F1, F2, F3, F4, HELP). Table 3-4 gives the
menu buttons function description.

Table 3-4 Menu buttons function description

Button

F1 F2 F3 F4

HELP

Function 1

HOME

ESC

Escape

Left

Right

Enter

Function 2

Up

Down

LCD provides you with the user-friendly interface and the 320 × 240 dot matrix image display. The user-friendly and
menu-driven LCD allows you to easily browse through the input, output, load and battery parameters, learn about the
current UPS status and alarm message, perform functional setting and control operation. The LCD also stores up to
512 historical alarm records that can retrieve for reference and diagnosis.

3.2 LCD Screen Types

3.2.1 Start Screen

Upon UPS start, the UPS executes the system self-test, and the start screen will appear and remain about 15
seconds, as shown in Figure 3-2.

F1

F2 F3 F4

HELP

Figure 3-2 Start screen

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26

Chapter 3 Operation And Display Panel

3.2.2 Primary Screen

After the UPS system self-test, the primary screen shown in Figure 3-3 will appear. The primary screen is composed
of four windows: system information window, data window, menu window and keypad window.

ITA 020kVA

1 3 3

2

:

0 : 6

System

information

window

L-N

voltage

(V)
L-N current (A)
Frequency (Hz)
L-L voltage (V)
Power factor

A(AB) B(BC) C(CA)

220 220 220

20.5 20.5 20.5

50.1 50.1 50.1
380 380 380

0.99 0.99 0.99
Output

Data window

Menu window

ES

Keypad window

C

F1

F2 F3 F4

HELP

Figure 3-3 Primary screen

The current icons on top of the F1 ~ F4 and HELP menu buttons give the explanations of each button. From any
menu in primary screen, press the F1 button can return to the ‘Output’ menu. For details about the primary screen,
refer to 3.3 Detailed Description Of Menu Items.

3.2.3 Default Screen

During the UPS operation, if there is no alarm within 2 minutes, the default screen shown in Figure 3-4 will appear.
After a short while, the LCD backlight will turn off. Press any menu button (F1 ~ F4, HELP), the primary screen will
appear again.

ITA

020kVA

1 3 3
2

:

0

:

6

Press any

button

to

return

to the main menu

F1

F2 F3 F4

HELP

Figure 3-4 Default screen

Chapter 3 Operation And Display Panel

27

3.3 Detailed Description Of Menu Items

The description in the following refers to the LCD primary screen shown in Figure 3-3.
System

information wi

ndow

The system information window displays the current time and the UPS name. You are not required for operating the
information of this window. For details, see Table 3-5.

Table 3-5 System information window

Item

Explanation

ITA 020kVA

UPS name, which stands for iTrust Adapt 20kVA UPS

12: 30: 36

Current time (format: 24 Hours, h: min: s)

Menu window and UPS data wi

ndow

The menu window displays the menu name of the data window. The data window displays the items of the menu
selected from the menu window. UPS parameters can be browsed and functions can be set through the menu
window and data window. Details are given in Table 3-6.

Table 3-6 Menu window and data window

Menu

Item

Explanation

Mains
L-N voltage (V)

Phase voltage

L-N current (A)

Phase current

Frequency (Hz)

Input frequency

L-L voltage (V)

Line voltage

Power factor

Power factor

Bypass
L-N voltage (V)

Phase voltage

Frequency (Hz)

Bypass frequency

L-L voltage (V)

Line voltage

Output
L-N voltage (V)

Phase voltage

L-N current (A)

Phase current

Frequency (Hz)

Output frequency

L-L voltage (V)

Line voltage

Power factor

Power factor

Load
Sout (kVA)

Sout: Apparent power

Pout (kW)

Pout: Active power

Qout (kVAR)

Qout: Reactive power

Load level (%)

The percentage of the UPS rated load

Crest factor

Output current crest factor

System
Sout (kVA)

Sout: Apparent power

Pout (kW)

Pout: Active power

Qout (kVAR)

Qout: Reactive power

Battery

Battery voltage (V)

Battery bus voltage

Battery current (A)

Battery bus current

Battery temperature
(°C)

Battery temperature (°C)

Battery remain time
(Min.)

Battery run time remaining

Battery capacity (%)

Battery capacity (%), compared to the new battery capacity

Battery boost charging

Battery is boost charging

Battery float charging

Battery is float charging

Battery is not connected

Battery is not connected

Event

(Current alarm)

Display current alarm. See Table 3-8 for UPS alarm message list

Records

(Historical alarm)

Display all historical alarms. See Table 3-8 for UPS alarm message list

Language

(Language selection)

Options are displayed in Chinese or English

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28

Chapter 3 Operation And Display Panel

Menu

Item

Explanation

Settings

Display contrast

Adjust the LCD contrast

Date format set

YYYY MM DD, DD MM YYYY and MM DD YYYY formats can be
selected.

Date & time

Set the date and time

Comm1 baud rate

Set the communication baud rate of the USB port

Comm2 baud rate

For internal communication only, can not be set

Comm3 baud rate

Set the communication baud rate of the SNMP card port

Communication address

This setting is suitable for RS485 communication

Communication mode

Set the communication mode

Callback times

If the communication mode of the SNMP card por t is Modem, you can
set alarm callback times here

Phone No.1

If the communication mode of the SNMP card por t is Modem, you can
set phone No.1 here

Phone No.2

If the communication mode of the SNMP card por t is Modem, you can
set phone No.2 here

Phone No.3

If the communication mode of the SNMP card por t is Modem, you can
set phone No.3 here

Command password

You can change the command password. Default: ‘123456’

Single Group Batt Cap

Battery capacity

Battery cells Number

Set the battery cell. The setting options include: 30-cell, 32-cell,
34-cell, 36-cell, 38-cell, 40-cell

Equalize Charge
Allowed

Enabled or disenabled

Temp Compensation

Enabled or disabled

Temp Sensor Position

Set the position of the temperature sensor. ‘Remote’ only

Shared Battery

Set each single in parallel system to share the battery group or not

System Configuration

Set the single/parallel

Parallel Requisite Units

Set the parallel number

Parallel Redundant
units

Set the redudant number

ECO Mode

ECO function enabled

Output Frequency Level

Set the output frequency

Output Voltage Level

Set the output voltage system

LBS Function

LBS function enabled

3-in 3-out/3-in 3-out

Set the output system: 3-in 3-out/3-in 3-out
This setting can only be carried out after the EPO operation. After the
setting, you must power off the system, and confirm that the system
actual connection mode complies with the setting. Power on again,
and the setting can come into force

Command (start, stop
battery, system test or
frocing boost charge)

Battery maintenance
test

The battery maintenance test will lead to the battery being partly
discharged, for rough assessment of the battery capacity. The load
must range from 20% ~ 100%

Battery capacity test

The battery capacity test will lead to the battery being completely
discharged, for accurate assessment of the battery capacity. The load
must range from 20% ~ 100%

System test

For UPS self-test. The user actives this function, 5 seconds later, a
pop window will appear to show the result of this test

Stop testing

Manually stop the test, including maintenance test, capacity test and
system test

Forcing charge

Manually conduct the forcing charge for battery

Stop forcing charge

Manually stop the forcing boost charge for battery

Version
Monitor Version

Provide the monitor software version

Rectifier Version

Provide the rectifier software version

Inverter Version

Provide the inverter software version

Keypad wi

ndow

The function of menu buttons (F1 ~ F4 and HELP) is shown in icon mode for the current display screen.

Chapter 3 Operation And Display Panel

29

3.4 Prompt Window

A prompt window is displayed during the operation of the system to alert you to certain conditions and/or to require
your confirmation of a command. The prompts and meanings are given in Table 3-7.

Table 3-7 Prompts and meanings

Prompt

Meaning

Transfer with interrupt, confirm or cancel

Inverter and bypass supplies are not synchronized, and any load transfer between
the supplies will cause a brief load interruption

This operation leads to output shutdown,
confirm or cancel

The bypass is in abnormal state, inverter shut down will cause the load power-off

Turn on more UPS to carry current load

The number of paralleled inverters already turned on is insufficient to carry the
existing load

Battery will be depleted, confirm or cancel

Battery maintenance test discharges the battery 100%. This prompt apears to
require your confirmation. Cancelling the test will ends the test and transfers the
UPS to Normal mode

System self-test finished, everything is ok

No action required

System self-test finished, please check the
current warnings

Check the current alarm message

Enter control password

Required for battery or UPS test

Battery self-test condition is low, please
check battery state and load level

Battery test condition is not met. Please check whether the battery is in boost
charge state and the load level is over 20%

Forcing charge condition is low, please
check battery state

This prompt appears when you select the forcing charge command while the
forcing charge condition is not met (such as no battery, charger failure)

Check the wiring according to the settings,
power-off takes effect, 3-phase (1-phase)
output

After setting the menu option ‘3-in 3-out/3-in 1-out’, you can power off the system
completely, and then power on again after the wiring is changed according to the
settings

3.5 UPS Alarm Message List

The following list gives the UPS alarm message list based on the ‘Current records’ and ‘Historical records’ menus in

Table 3-8.

Table 3-8 UPS alarm message list

Alarm message

Description

Inverter comm. fail

Internal communication failure between the monitoring board and inverter

Rectifier comm. fail

Internal communication failure between the monitoring board and rectifier

Parallel comm. fail

The CAN communication between different UPS s within a parallel system fails. 1.Check if there are
some UPSs not powered on in the parallel system. If so, power on these UPSs and check if the alarm
disappears. 2. Press the FAULT CLEAR button

Battery fault

Battery detected faulty (Reserved)

Battery replaced

Battery test failed, Battery should be replaced

Battery low
pre-warning

Before the end of discharge, battery undervoltage pre-warning should occur. After this pre-warning,
battery should have the capacity for 3 minutes discharging with full load. The time is user-configured
from 3 minutes to 60 minutes. Shut down the load in time

Battery stop
discharge

Inverter turned off due to low battery voltage. Check the utility failure and try to recover it

Mains volt. abnormal

Mains Voltage exceeds the upper or lower limit and results in rectifier shutdown. Check the input
line-to-neutral voltage amplitude of rectifier

Mains undervoltage

Mains voltage is undervoltage. Derate for running and check the input line voltage

Mains freq. abnormal

Mains frequency is out of limit range and results in rectifier shutdown. Check the input frequency

Rectifier block

Rectifier detected faulty. Rectifier shuts down. Battery discharges

Rectifier overtemp.

The temperature of heat sink is too high to keep the rectifier running. The UPS can recover
automatically. Check the environment and ventilation

Battery charger fault

Battery charger is over voltage

Control power 1 fail

UPS operates but Control Power is not available

Mains phase reversed

Rectifier AC input phase sequence is reversed

Rectifier overcurrent

Rectifier is over current

Soft start fail

Rectifier could not start due to low DC bus voltage

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30

Chapter 3 Operation And Display Panel

Alarm message

Description

Bypass unable to
trace

This alarm is triggered by an inverter software routine when the amplitude or frequency of bypass
voltage is beyond the normal range. The amplitude threshold is fixed for ±10% rating.
This alarm will automatically recover when the bypass voltage goes normal.

1. First verify that the bypass voltage and frequency displayed on the operator control and display panel
is within the selected range. Note that the rated voltage and frequency are specified by the ‘Output
Voltage Level’ and ‘Output Frequency Level’ respectively.

2. If the displayed voltage is abnormal, please verify the actual bypass voltage and frequency presented
to the UPS. Check the external power if it is found to be faulty

Bypass protection

This alarm is triggered by an inverter software program when the amplitude or frequency of bypass
voltage is too high or too low. The amplitude threshold is fixed for ±10% rating. This alarm will
automatically recover when the bypass voltage goes normal.

1. First check if there are some relevant alarms, such as ‘Bypass Phase Reverse’, ‘Input Disconnect
Fault’. If so, solve them first.

2. Then verify that the bypass voltage and frequency displayed on the LCD are within the limit. Note that
the rated voltage and frequency are specified by the ‘Output Voltage Level’ and ‘Output Frequency
Level’ respectively.

3. If the displayed voltage is abnormal, please verify the actual bypass voltage and frequency presented
to the UPS. Check the external power if it is found to be faulty. If the utility is likely to trigger this alarm
frequently, the bypass limit can be changed a little larger through the configuration software according to
the user feedback

Inverter asynchronous

This alarm is triggered by an inverter software program when the inverter and bypass waveforms are
misaligned by more than 6 degrees in phase. The amplitude threshold is fixed for ±10% rating. This
alarm will recover automatically when the alarm condition disappears.

1. First check if the alarm ‘Bypass Unable To Trace’ or ‘Bypass Protection’. If so, solve it first.

2. Verify the waveform of the bypass voltage. If it is too distorted, ask the user to verify it and seek any
possible measurement

Inverter fault

Inverter output voltage beyond limits. Load transfers to bypass

Inverter overtemp.

The temperature of the inverter heat sink is too high to keep inverter running. This alarm is triggered by
the signal from a temperature monitoring thermostat on the inverter bridge heat sink. The UPS will
recover automatically after 5 minutes delay from the disappearance of the overtemperature signal. If the
overtemperature condition is true, check the following items:

1. high ambient temperature. 2. blocked cooling airway. 3. any fan failure. 4. prolonged inverter overloa d

Fan fault

At least one of the cooling fans has failed

Inverter STS fail

At least one of the static switches of inverter side is open or shor t circuit. This fault is locked until power
off

Bypass STS fail

At least one of the static switches of bypass side is open or short circuit. This fault is locked until power
off

Operation invalid

Incorrect operation

Neighbor bypass
SSTS fail

At least one of the static switches of single bypass side in parallel systemis open or short circuit. This
fault is locked until power off

Output fuse fail

At least one inverter output fuse blowou. The inverter shuts down, the load transfers to bypass

Unit over load

The UPS is confirmed to be overload when the load arises above 105% nominal rating. The alarm
automatically resets once the overload condition is removed. 1. Confirm that the alarm is true by
checking the load percent indicated on the LCD to determine which phase is being overloaded. 2. If the
alarm is true, measure the actual output current to verify tha t the indications are valid. Disconnect
unnecessary load and ensure the safety.

Byp. abnormal
shutdown

Both bypass and inverter voltages unavailable. Load interruption

Inverter over current

Inverter pulse width modulation module overloaded

Bypass phase reverse

The phase sequence direction of bypass voltage is reversed. Normally, the phase of phase B lags 120
degrees behind phase A, and the phase of phase C lags 120 degrees behind phase B.
Verify that the phase rotation of the bypass supply presented to the UPS is correct, and rectify it if it is
found to be in error

Load impact transfers
bypass

A transfer to bypass occurred due to a large step load. The UPS should recover automatically. Turn on
connected equipment in sequential order to reduce the step loading of the inverter

Transfer time-out

The load is on bypass power due to excessive number of transfers that occurred within the last hour.
The UPS will recover automatically and will transfer the load back to inverter power within an hour

Bus abnormal

DC input voltage to inverter beyond limits. Inverter shuts down. Load transfers to bypass

Chapter 3 Operation And Display Panel

31

Alarm message

Description

DC bus over voltage

Rectifier and inverter were shut down because DC bus voltage is too high. Check whether there is a
fault in rectifier side. If not, check whether there is an overload. After recovering the fault, restart the
inverter

Bypass over current

Bypass current is over limit above 135% rating. The UPS just alarms without any action

Setting save error

History records not saved (Reserved)

Input Disconnect
Fault

AC mains input neutral is not checked out

Protocol version clash

Firmware incompatibility between Monitor Board and Digital Signal Processor Board

Manual on

Manual Turn On through operator control and display panel

Manual off

Manual Turn Off through operator control and display panel

EPO

Press the EPO switch directly or receive the external EPO command

Transfer confirm

Prompt to press the Enter button to acknowledge that an interrupted load transfer to bypass will happen

Transfer cancel

Prompt to press the ESC button to avoid that an interrupted load transfer to bypass will happen

Fault clear

Press FAULT CLEAR

Alarm silence

Press ALARM CLEAR

Turn on fail

Inverter failed to turn on when INVERTER ON direct access button was pressed. This may be as a
result of Invalid Operation (maintenance bypass on) or DC bus or rectifier not ready

Alarm silence cancle

Press FAULT CLEAR or ALARM CLEAR

Bypass mode

The UPS is in Bypass mode

Normal mode

The UPS is in Normal mode

Battery mode

The UPS is in Battery mode

Check UPS output

The UPS is off and has no output

Battery float charging

Battery status (Float charge mode)

Battery boost
charging

Battery status (Boost charge mode)

Battery discharging

Battery status (discharge mode)

Battery period testing

Automatic periodic battery maintenance discharge test (20% capacity discharge)

Batt. capacity testing

User initiated battery capacity discharge test (100% capacity discharge)

Batt. maint. testing

User initiated maintenance discharge test (20% capacity discharge)

UPS system testing

User initiated system test

Inverter in setting

Inverter starting up and synchronizing

Rectifier in setting

Rectifier starting up and synchronizing

Battery reverse

Reconnect the battery, check the battery connection

No battery

Check the battery and the battery wiring

Auto start

After UPS was shutdown at EOD, inverter auto starts when utility restore

REC FLASH
UPDATE

Ongoing update of rectifier firmware

INV FLASH UPDATE

Ongoing update of inverter firmware

MONITOR FLASH
UPDATE

Ongoing update of monitor firmware

DSP softwar error

Inverter software does not match the rectifier software

Note: If the alarm is caused through setting the software value by Emerson authorized engineer, and when you wish to change
the setting values, please get in touch with the Emerson local customer service center

iTrust Adapt UPS 20kVA User Manual

32

Chapter 4 UPS Operation Instructions

Chapter 4 UPS Operation Instructions

This chapter gives a detailed description of the UPS operation procedures.
Refer to Chapter 3 Operation And Display Panel for all buttons operation and LED display in operation. During the

operation, the buzzer alarm may appear, at this point, you should press the ALARM CLEAR button for audible alarm
silence.

Warning: Hazard mains and/or battery voltage exists behind the protective cover

No user accessable parts are located behind the protective covers that require a tool for removal. Only qualified service personnel
are authorized to remove such covers.

4.1 UPS Start-up

The start-up procedures can be performed after the installation is finished, the system has been commissioned by
authorized personnel and the external input switches are closed.

Warning

This procedure results in mains voltage being applied to the UPS output terminals. Confirm that the load power is safe, if there is a
load to be connected with the UPS output terminal. Ensure that the load is isolated with the UPS output terminal, if the load is not
ready for accepting the power.

4.1.1 Normal Module Start-up Procedure

This procedure is suitable for UPS start-up when the UPS is in complete disconnection state. Procedures are as
follows:

1. Close the UPS external output switch and input switch on by one.
At this point, LCD displays the start screen, and the rectifier starts. After the rectifier runs in normal state about 30s,

the rectifier start-up is finished.

2. Press the ON button for 2 seconds.
At this point, the inverter starts, and the inverter indicators are blinking green. After the inverter runs in normal state,

the UPS transfers from bypass state to inverter state. The inverter indicators turn green, and the UPS runs in Normal
state.

4.1.2 Battery Module Start-up Procedure

1. Check that the batteries have been well connected.

2. Press the battery cold start button on the UPS front panel (see Figure1-1).
At this point, LCD displays the start screen. After the rectifier start-up is finished, the fault indicator is off.

3. Press the ON button for 2 seconds, the UPS will run in Battery mode.

4.2 Transferring Procedures Between Operation Modes

4.2.1 Transferring From Normal Mode To Battery Mode

In the event of mains failure, the UPS will transfer to Battery mode. If you wish to transfer the UPS from Battery mode
to Normal mode, you should wait few seconds for mains input recovery. 10 seconds later, the rectifier will restart
automatically, and the inverter will restore the power.

Chapter 4 UPS Operation Instructions

33

4.2.2 Transferring From Normal Mode To Bypass Mode

In Normal mode, press the OFF for 2 seconds, you can transfer the UPS to Bypass mode.

Note

In Bypass mode, the load accepts the power not from the pure power outputted by the inverter, but from the mains power directly.

4.2.3 Transferring From Bypass Mode To Normal Mode

In Bypass mode, press the ON button for 2 seconds. After the inverter runs in normal state, the UPS transfers to
Normal mode.

4.2.4 Transferring From Normal Mode To Maintenance Bypass Mode

When the UPS is running in Normal mode, you can use this procedure to make the load transfer from inverter output
to maintenance bypass.

Caution

1. Before performing this procedure, you should check the LED information first, and make sure the bypass is normal and
synchronizes with the inverter. Otherwise, it may result in the load power interruption for a while.

2. You should select the single POD options or prepare the maintenance bypass switch by yourself, so as to realize this function.

1. Press the OFF for 2 seconds.
The inverter indicators are off, and the buzzer alarms. The load transfers to the static bypass, and the inverter shuts

down.

Note

Press the ALARM CLEAR button can silence the alarm, but the alarm message of the the LCD is not disappeared until the alarm
status is cleared.

2. Close the maintenance bypass switch on the single POD front panel, and the maintenance bypass can supply
power to the load.

Warning

If you wish to maintain the UPS, you should wait 10 minutes for the internal DC bus capacitance voltage discharging.

3. Disconnect the main/bypass input switch and output switch.

Caution

1. When the UPS is in Maintenance Bypass mode, the load does not have the mains abnormal protection.

2. After the UPS transfers to maintenance bypass, the UPS is not in operation, and the LCD is no display, and only the user
terminal block of the single POD is electrified. Be careful when removes the UPS to be maintained.

4.3 Complete Shutdown Procedure

If you wish to shut down the UPS completely, the procedures in 4.2.4 Transferring From Normal Mode To
Maintenance Bypass Mode should be followed, so as to transfer the UPS from Normal mode to Maintenance Bypass
mode.

Disconnect the external input switch, if you wish to isolate the UPS from AC power.

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Chapter 4 UPS Operation Instructions

4.4 EPO Procedure

The UPS operation and display panel has an EPO switch, which is designed to switch off the UPS in emergency
conditions (such as fire, flood, and so on). The system will turn off the rectifier, inverter and stop powering the load
immediately (inverter and bypass included), and the battery stops charging or discharging.

If the mains input is present, the UPS control circuit will remain active; however, the output is closed. To remove all
mains power from the UPS, the external input switch should be disconnected.

4.5 Auto Restart

When the mains power failure, the UPS draws power from the battery to supply the load until the batteries are
depleted, then the UPS will shut down.

The UPS will automatically restart and recover output power supply:

•

After the mains power is restored.

•

The UPS Auto Restart function is enabled.

•

After the Auto Restart is delayed (default: 10 minutes). During the Auto Restart delay, the UPS will charge the

battery to provide a safety margin for equipment shutdown if input power fails again.

If the Auto Restart function is disabled, you can restart the UPS manually by pressing the FAULT CLEAR button.

4.6 UPS Reset Procedure

The EPO action or the following reasons such as inverter overtemperature, power-off overload, battery overvoltage
and excessive switching may result in the UPS power-off. After all appropriate measures have been taken to clear the
faults indicated by the alarm message appearing on the LCD, you can carry out the following steps to restore the
UPS to normal operation state.

1. Press the FAULT CLEAR button to make the system exit the EPO state.

2. Press the ON button for 2s.

Note

1. The rectifier restarts, and the bypass supplies power to the load. When the rectifier starts, the fault indicator blinks. When the
rectifier runs in normal operation state (about 30 seconds later), the fault indicator will turn off.

2. 5 minutes after the overtemperature signal disappears, that is, when the overtemperature fault is eliminated, the rectifier will
automatically start.

3. After the EPO button is pressed, if the mains input is disconnected, the UPS will shut down completely. When the mains input is
available, the UPS will start and run in Bypass mode, and also the output is available.

4.7 Language Selection

The LCD menus are available in two languages: Chinese, English.
Procedures for selecting the language:

1. From the ‘Output’ menu, press F3 or F4 (left or right arrow) to select the ‘Language’ menu.

2. Press F5 (Enter) to move the cursor to the data window of the LCD.

3. Use F3 and F4 (up and down arrows) to select the required language.

4. Press F5 (Enter) to confirm.

5. Return to the ‘Output’ menu by repeatedly pressing F2 (ESC). At this point, all texts on the LCD will be displayed in
the selected language.

Chapter 4 UPS Operation Instructions

35

4.8 Changing Current Date And Time

Procedures for changing the system date and time:

1. From the ‘Output’ menu, press F3 or F4 (left or right arrow) to select the ‘Settings’ menu.

2. Press F5 (Enter) to move the cursor to the data window of the LCD.

3. Use F3 and F4 (up and down arrows) to select ‘Date & time’ option, then press F5 (Enter).

4. Move the cursor to the row in which the date and time are displayed, then press F5 (Enter).

5. Use F3 or F4 (up or down arrows), and enter the current time and date information.

6. Press F5 (Enter) to confirm, and then press F2 (ESC) to return to the ‘Output’ menu.

4.9 Controlling Password

The system provides the password protection for the UPS operation control. The default password is ‘123456’. Only
through the password verification can you conduct the UPS and battery test operation.

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Chapter 5 Maintenance

Chapter 5

Maintenance

This chapter focuses on the UPS maintenance, including the fan maintenance, battery maintenance, UPS cleaning,
UPS state check, UPS function check.

5.1 Fan Maintenance

The UPS fans are expected to run for 20000 hours ~ 40000 hours continuously. The higher the ambient temperature,
the shorter the fan life is. Durin g the UPS operation, please verify the fan status once every half year by confirming
that air blows out from the ventilation holes on the rear panel.

5.2 Battery Maintenance

The internal battery module of the UPS is sealed, lead-acid, maintenance-free battery. The battery life depends on
the ambient temperature, charge and discharge times. High ambient temperature and deep discharge shortens the
battery life.

To ensure the battery life, it is required to:

•

Keep the ambient temperature ranging from 15°C to 25°C.

•

Prevent small current discharge. Continuous battery operation time exceeding 24 hours is strictly prohibited.

•

Charge the battery for at least 12 hours, if the battery hasn't been charged for three months at specified ambient

temperature, or two months at high ambient temperature.

Note

1. Never short circuit the battery terminals, which will result in fire.

2. Never open the battery, as the electrolyte is harmful to human body. In the event of inadvertent contact of the electrolyte, wash
the affected area immediately with plenty of clean water and go to see the doctor.

5.3 Cleaning UPS

Clean the UPS periodically, especially the ventilation holes, to ensure free airflow inside the UPS. If necessary, clean
the UPS with a vacuum cleaner. Confirm that the ventilation holes are unobstructed.

5.4 Checking UPS State

It is recommended to check the UPS operation status once every half year.
Procedures are as follows:

1. Check if the UPS is faulty: Is the FAULT indicator on? Is the UPS giving any alarm?

2. Check if the UPS is operating in Bypass mode: Normally, the UPS operates in Normal mode; if it is operating in
Bypass mode, find out the reason, such as operator intervention, overload, internal fault, and so on.

3. Check if the battery is discharging: When AC mains is normal, the battery should not discharge; if the UPS
operates in Battery mode, you should find out the reason, such as mains failure, battery test, operator intervention,
and so on.

5.5 Checking UPS Functions

Note

UPS functions check procedures may cause power interruption to load!

Chapter 5 Maintenance

37

It is recommended to check the UPS functions once every half year.
Backup the load data before conducting the UPS functions check. Procedures are as follows:

1. Press the OFF button to check if the buzzer beeps, indicators are on and the LCD display is normal.

2. Press the ALARM CLEAR button to check again if the indicators are on, the LCD display is normal and the UPS
has been transfered to the inverter mode.

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Appendix 1 Battery Module

Appendix

1 Battery Module

Appearance
The protective panel has been installed before delivery to avoid the damage to the battery module during the

transportation. Remove six fixing screws to take off the protective panel after the battery module arrival. The
appearance of the battery module is shown in Figure 1.

Fixing

screw

(6

pcs)

Protective
panel

Figure 1 Appearance of the battery module

Rear panel
Operation panel on the front panel of the battery module is not available. The battery module provides battery ports,

battery fuse box and ventilation holes on the rear panel, as shown in Figure 2.

Battery port 1 Battery port 2

Ventilation holes

Battery fuse box

Figure 2 Rear panel of the battery module

Appendix 1 Battery Module

39

保险盒盖板

Replacing the battery fuse
If the battery internal fuse is damaged, loosen the protective cover of fuse box on the battery module rear panel and

replace the damaged fuse with a new one, then tighten the fixing screws of the protective cover of fuse box to prevent
electric shock risk during the UPS operation, as shown in Figure 3.

Protective cover
of fuse box

Figure 3 Schematic diagram of replacing fuse

Note

1. The battery loop and AC input are not insulated, a hazardous voltage may exist between the battery ports and ground, so it is
prohibited to touch them for avoiding electric risk.

2. The length of the standard battery cable delivered with the battery module is 0.5m. If you need more length cable, please
consult the dealer.

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Appendix 2 Optional Part List

Appendix

2 Optional Part List

The optional part list is given in Table 1.

Table 1 Optional part list

Optional part

Type

Remark

Communication options
UF-SNMP810

SNMP card assembly used in Intellislot UPS - ROHS

UF-DRY320

Dry contact extended card used in UPS - {R5}

UF-DRY310

Dry contact card and its assembly usd in UPS - {R5}

UF-RS485

RS232 to 485 component

UFMOD21Z1

MODBUS assembly used in UPS (UFMOD21Z1) - {R5}

POD

UF-POD3U20K10

3-in 3-out/3-in 3-in 1-out rack model 20kVA smart UPS single POD

UF-POD6U20K11

3-in 3-out/3-in 3-in 1-out rack model 20kVA smart UPS 1 + 1 parallel POD

Guide rail/rack

DMBM4.115.331

Used for rack installation mode

Battery module

U16-07C1

A battery cabinet with one-layer

Battery cable
components selection

Used for battery module selection

Battery cabinet with
two-layer

U20-24C2

Used for battery perparation by the user

Battery cabinet with
three- layer

U20-38C3

Used for battery perparation by the user