LEGRAND KEOR T EVO Operation Manual

KEOR T EVO 10-15-20 KVA

Installation & Operation Manual

LE10507AA

LE10507AA

KEOR T EVO

1

KEOR T EVO

Installation & Operation Manual

1. FOREWORD 3

1.1. Overview 3

1.2. Manual 3

2. WARRANTY 5

2.1. Terms of Warranty 5

2.2. Out of Warranty Terms and Conditions 5

3. SAFETY 6

3.1. Description of the Symbols Used on the Labels Applied to the UPS 6

3.2. Individual Protective Gear 6

3.3. Important Notice for UPS 7

3.4. Important Notice for Battery 8

3.5. Emergency interventions 8

4. OPERATION MODES 9

4.1. Online Mode 9

4.2. Battery Mode 10

4.3. Bypass Mode 11

4.4. Eco Mode 12

4.5. No Operation 12

4.6. Operation with Maintenance Bypass 12

4.7. Operation with External Maintenance Bypass (Optional) 12

5. REQUIREMENT 13

5.1. Transportation 13

5.2. Placement 13

5.3. Storage 15

5.4. Electrical Requisites 15

6. INSTALLATION 18

6.1. Models and Dimensions 18

6.2. Unpacking Procedure 19

6.3. Installation Procedures and Instructions 20

6.3.1. Power Connections of Single Systems 21

6.3.2. Power Connections of Parallel Systems 34

7. HUMAN MACHINE INTERFACE 36

7.1. Front Panel Segments 36

7.1.1. Colour Graphical Touchscreen 37

7.1.2. UPS Status LED Bar 39

7.2. Menu 40

7.2.1. Alarms Menu 40

7.2.2. Measurements Menu 41

7.2.3. Settings Menu 42

7.2.4. Diagnostics Menu 45

7.2.5. About Menu 47

7.2.6. Command Menu 47

8. COMMUNICATION 49

8.1. Serial Communication (RS232) 50

8.2. Emergency Switching Device and Generator Connections 51

8.3. Dry Contacts 52

8.4. RS485 53

2

9. OPERATING PROCEDURES FOR SINGLE SYSTEMS 54

9.1. Preparations 54

9.2. Commissioning 55

9.2.1. Start-Up UPS with Internal Battery 55

9.2.2. Start-Up UPS with External Battery 55

9.3. Decommissioning 56

9.4. Maintenance Bypass Commissioning Instructions 56
(Transfer Load Supply from UPS to Internal Maintenance Bypass)

9.5. Maintenance Bypass Decommissioning Instructions 57

10. OPERATING PROCEDURES FOR PARALLEL SYSTEMS 58

10.1. Introduction 58

10.1.1. Redundancy 58

10.1.2. Power Increase 58

10.2. Procedure for Commissioning and Start-Up 59

10.3. Procedure for Decommissioning 60

11. TROUBLESHOOTING 61

11.1. Bypass voltage failure Alarm 61

11.2. Bypass phase sequence wrong Alarm 61

11.3. Inverter not sync. with bypass Alarm 61

11.4. Input phase sequence wrong Alarm 61

11.5. Rectier not sync. with input Alarm 61

11.6. DC voltage failure Alarms 61

11.7. ESD active Alarm 61

11.8. Ambient temperature high Alarm 61

11.9. Overload Alarms 61

11.10. Maintenance bypass active Alarm 62

11.11. Battery test failure Alarm 62

11.12. Input voltage failure Alarms 62

11.13. Inverter temperature high/ Rectier temperature high Alarms 62

12. PREVENTIVE MAINTENANCE 63

12.1. Batteries 63

12.2. Battery Fuses 63

12.3. Fans 64

12.4. Capacitors 64

Appendix-1: Alarms List 65
Appendix-2: Diagnostics List 66
Appendix-3: Event List 67
Appendix-4: Technical Specications 69
Appendix-5: Modbus List 71
Appendix-6: Description of UPS and Block Diagram 73

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KEOR T EVO

Installation & Operation Manual

1. Foreword

1.1. Overview

Thank you for choosing LEGRAND UPS KEOR T EVO product.

KEOR T EVO has been designed with advanced technologies and the latest compo¬nents generation;
realized to satisfy both users and instal¬lers in their operational needs of high availability and perfor¬mance.

This UPS aims to be ecient, functional, safe and very easy to install and use. LEGRAND has studied the
best way to reconcile high-tech performance and ease of use, making “user friendly” technologi¬cally
advanced products.

KEOR T EVO supplies maximum protection and power quality for any type of IT load, tertiary application,
lighting or building.

Furthermore, standards deployed by Legrand for R&D, supplier selection and manufacturing comply with
the highest quality standards. This product is manufactured in an ISO 9001 & ISO14001 certied factory
in full compliance with the eco-design laws. The UPS KEOR T EVO system is made in compliance with the
existing European Community directives and with the technical standards in force to comply with CE
marking as certied by the Declaration of Conformity issued by the Manufacturer.

Technology & Architecture

A special feature of KEOR T EVO is Online Double Conversion Operation (VFI-SS-111 as dened by the
reference standard EN 62040-3) based on the capacity to supply a voltage that is perfectly stabilized in
frequency and amplitude, even in event of extreme alterations of mains power supply.

The 3-Level Switching Technology used in this product is the latest solution to provide high energy
eciency even with low load conditions.

The energy eciency performance of KEOR T EVO surpasses the minimum requirements dened by the
Code of Conduct on Energy eciency and Quality of European of AC UPS dened by EC.

KEOR T EVO represents the best solution combining high performance, low management costs and ease
of operation and maintenance:

• Dual Input

• User friendly touch screen design

• UPS via LED bar (with trac light coding) gives an immediate diagnosis of the system under any conditions.

• Internal Battery option as well as wide range external battery cabinets.

• Integrated Maintenance Bypass

• Parallel connection to increase the power

• Availability of dierent communication types

1.2. Manual

• The purpose of this manual is to provide indications for using the equipment safely and to carry out rst
level of troubleshooting.

• This manual is addressed to persons already educated on precautions to adopt in face of electrical
hazard

• This manual is addressed to “User“, generic term to identify all persons that will have the need and / or
obligation to provide instructions or operate directly this UPS equipment

• Adjustments, preventive and curative maintenance jobs are not dealt with in this manual as they are
reserved exclusively to skilled and authorized Legrand UPS Technical Service Engineers.

4

• The intended use and congurations envisaged for the equipment are the only ones allowed by the
Manufacturer; do not attempt to use the equipment in disagreement with the indications given. Any other
use or conguration must be agreed and written by the Manufacturer, in such a case, will be an enclosure
to the manual.

• For its use the user must also comply with the specic laws in force that exist in the country where the
equipment is installed. Reference is also made in this manual to laws, directives, etc., that the user must
know and consult in order to full the purposes established by the manual.

• If information is exchanged with the Manufacturer or assistance personnel authorized by the former,
please refer to the equipment’s rating plate data and serial number.

• The manual must be kept for the equipment’s useful life cycle and, if necessary (e.g. damage which
prevents it being consulted even partially) the user must ask the Manufacturer for a new copy, quoting the
publishing code on the cover.

• The manual reects the state of the art at the moment the equipment was put on the market, of which
it is an integral part. The publication complies with the directives in force at such a date. The manual cannot
be considered inadequate if updates of standards or changes are made to the equipment.

• Any integration to the manual which the Manufacturer deems tting to send to the users must be kept
with the manual, becoming an integral part of it.

• The Manufacturer is available to its clientele to provide additional information and will take into
consideration any suggestions made to improve this manual to bring it even closer to the requirements for
which it was drawn up.

• If the equipment is sold, which always includes handing over this operating manual, the primary user
must notify the Manufacturer, giving him the address of the new user so the latter can be reached if there
are any communications and/or updates deemed indispensable.

The manufacturer reserves the rights to change the technical specications
and design without notice.

LEGRAND reserves the rights to change the information in this document
without notice. Refer to http://ups.legrand.com/ web site to dowload last
release and translations.

Units that are labelled with a CE mark comply with the Standard: EN 62040-1 and EN 62040-2.

Read the manual completely before working on this equipment!

Reproduction, adaptation, or translation of this manual is prohibited without prior
written permission of LEGRAND Company, except as allowed under the copyright laws.

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KEOR T EVO

Installation & Operation Manual

2. Warranty

2.1. Terms of Warranty

• Warranty is dened by General Conditions of Sale and Delivery.

• The UPS including all the internal parts is under the warranty of LEGRAND.

• If the UPS malfunctions because of component, manufacturing or installation (if it’s done by authorized
LEGRAND UPS Technical Service Personnel) problems during the warranty period, the UPS will be repaired
(spares and labour) by the Manufacturer under warranty.

2.2. Out of Warranty Terms and Conditions

This Warranty does not apply if:

• UPS not commissioned or maintained by an authorized LEGRAND UPS Technical Service sta or an
authorized LEGRAND distributor Technical Service sta

• UPS not used according the terms of operating and installation manual

• Product serial number label has been removed or lost

This Warranty does not cover any defects or damages caused by:

• Neglect, accident, misuse, misapplication

• Failure due to fortuitous circumstances or force majeure (lightning, oods…etc.),

• Unloading and transportation damage and failures after delivery,

• Damage or injuries caused by negligence, lack of inspection or maintenance, or improper use of the
products,

• Faulty electrical wiring,

• Defects arising either from designs or parts imposed or supplied by the purchaser,

• Defects and damage by re and lightning,

• Failures due to modication in the products without LEGRAND approval,

• Improper installation, testing, operation, maintenance, repair, alteration, adjustment, or modication of
any kind by unauthorized personnel,

The Manufacturer will repair the device in such cases for a fee and is not responsible for the shipment of
the equipment.

The Battery warranty does not apply if the temperature in the room exceeds 25 °C.

Extended battery warranty does not apply if:

• UPS has not been commissioned

• A yearly preventive maintenance visit has not been performed

By an authorized LEGRAND UPS Technical Service sta or authorized LEGRAND distributor Technical
Service sta.

The UPS may contain batteries that should be recharged 24Hours min after 6 month storage duration to
avoid deep battery discharge. Warranty cannot apply on batteries that have suered of deep discharge.

6

3.2. Individual Protective Gear

There is a high risk of electrical shock with the equipment as well as a considerable short circuit current. When installing
and servicing the equipment it is absolutely forbidden to work without the protective gear mentioned in this paragraph.

The personnel who are going to work with the equipment for installation or maintenance jobs must not wear clothes
with baggy sleeves or laces, belts, bracelets or other metal items that could be a hazard source.

The following indications summarize the protective gear to wear.

3.1. Description of the Symbols Used on the Labels Applied to the UPS

3. Safety

Information related to safety of the UPS, battery, load and the user is summarized below.
But the equipment should not be installed before reading the manual completely.

PE: PROTECTIVE EARTH

PB: PROTECTIVE BONDING

DANGER! HIGH VOLTAGE (BLACK/YELLOW)

This symbol points out the instructions, which may result with injury of
the operator or damage of the equipment if not obeyed.

Accident and spark proof footwear with rubber sole and reinforced toe

Use : always

Waterproof rubber gloves

Use : always

Protective gear

Use : always

Protective glasses

Use : always

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KEOR T EVO

Installation & Operation Manual

3.3. Important Notice for UPS

• The equipment may only be installed and commissioned by authorized LEGRAND UPS Technical Service Personnel.

• This manual contains important instructions that you should follow during installation and maintenance of the UPS
and batteries. Please read all instructions before installing the equipment and save this manual for future reference.

• Not obeying the instructions written on this manual which may result with possible injury of the operator or damage
of the equipment.

• The equipment shall be packed and xed properly during transportation to avoid fall down and proper equipment
should be used for transportation. Never transport in horizontal position.

• The UPS must always stands in a vertical position. Make sure that the oor can support the weight of the system.

• Connect the PE ground connector before connecting any other cable.

• UPS is designed for indoor use. To reduce the risk of re or electric shock, install this UPS in a temperature and humidity
controlled indoor environment, free of conductive contaminants. Ambient temperature must not exceed 40°C (104°F).
Do not operate near water or excessive humidity (95% maximum without condensation).

• UPS requires 3Ph-N+PE input connection.

• Do not connect the output neutral to the protective ground or protective bonding. KEOR T EVO does not modify the
neutral arrangements of the system; the use of an isolation transformer is required should it be necessary to modify the
neutral arrangements downstream KEOR T EVO.

• KEOR T EVO must be protected from voltage surge with devices that are suited to the installation; the mains voltage
surge must be limited to 2kV. These protective devices must be sized to take into account all the installation parameters
(geographical position whether or not there is a lightning rod, whether or not there are other suppressors in the
electrical installation, etc )

• Even when connections removed, residual voltages of capacitors and/or high temperature may exist on connection
terminals and inside the UPS. Before working on terminals, check between all the terminals included PE that no
hazardous voltages exist.

• The connections shall be made with cables of appropriate cross-section in order to prevent the risk of re. All cables
shall be of insulated type and shall not be laid out on the walking path of the persons.

• According to IEC 62040-2; this is a product for commercial and industrial application. In the second environment
installation restrictions or additional measures may be needed to prevent disturbances.

• Contact your local recycling or hazardous waste centre for information on proper disposal of the used battery or UPS.

• Make sure that the UPS is not overloaded to provide a higher quality supply to the loads.

• In case of an extraordinary situation (damaged body, cabinet or connections, penetration of foreign materials into
the body or cabinet etc.) de-energize the UPS immediately and consult to the LEGRAND Technical Assistance Centre.

• When used for particular applications such as life support systems or any other application where product failure is
likely to cause substantial harms to person, we would advise you to contact LEGRAND UPS to conrm the ability of
these products to meet the requested level of safety, performance, reliability and compliance with applicable laws,
regulations and specications.

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3.4. Important Notice for Battery

• The batteries may only be installed and commissioned by authorized LEGRAND UPS Technical Service Personnel.

• Make sure that the battery qty is proper for the unit and they are same type and capacity. Otherwise danger of
explosion and re is within the bounds of possibility.

• Do not dispose of batteries in a re. The batteries may explode.

• Do not open or mutilate batteries. Released electrolyte is harmful to the skin and eyes. It may be toxic.

• In case of electrolyte in contact with skin, immediately wash the contaminated skin with water.

• Replaced batteries must be disposed of at authorized battery waste disposal centres.

• A battery can present risk of electric shock and high short circuit currents.

The following precautions should be observed when working on batteries;

• Remove rings, watches, necklaces, bracelets and all metal objects.

• Only use tools with insulated handles.

• Wear rubbers gloves and a rubber apron when handling batteries.

• Do not lay tools or metal parts on top of batteries.

• Eye protection should be worn to prevent injury from accidental electrical arcs.

• Before a maintenance or repair work on the UPS;

• Switch the input, output and battery circuit breakers (Q1, Q2 and F5) to “OFF” position.

• If UPS has internal batteries; Remove and isolate + battery (red) and N battery neutral (blue) cables.

• If UPS has external batteries; also switch the circuit breakers of the battery cabinet to “OFF” position.

• Determine if the battery is inadvertently grounded. If inadvertently grounded; remove source of ground. Contact
with any part of a grounded battery can result in electrical shock.

• Battery fuses shall only be replaced with the same rating and type which came along with the UPS.

3.5. Emergency interventions

The following information is of a general nature. For specic interventions please consult the laws existing in the
country where the equipment is installed.

First aid interventions

If any rst aid intervention is required, comply with company rules and traditional procedures.

Fire-prevention measures

Never use water to extinguish re but only the extinguishers designed specically for electronic equipment or battery
res.

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KEOR T EVO

Installation & Operation Manual

4. Operation Modes

Uninterruptible Power Supplies (UPS) most important function is the protection of critical and sensitive loads
from the irregular mains voltage conditions. They are used to supply uninterruptible energy to these loads
in such irregular mains voltage conditions and provide regulated energy supply to the equipment present in
the IT room, industrial workshop, hospitals and oces.

KEOR T EVO UPS during Online mode operation provides stable pure sine wave not aected by input voltage
uctuations. This helps to extend the life time of your sensible loads. Power factor of the current consumed
from mains is nearly one. This allows perfect adaptation to upstream generator or isolation transformer
supply. The reactive power consumption decreases.

During mains voltage failure, the energy needed for the load is provided by the internal battery (or installed
in external battery cabinet/s). These batteries are charged by an intelligent battery charging circuit when
mains voltage is within the limits. Batteries are lead acid battery (VRLA) and do not require any maintenance
until the end of their life time.

In case of long overload or inverter failure situation, UPS transfers the load supply to bypass line, and load is
supplied by mains . When the condition turns back to normal, UPS will continue to supply the load through
inverter.

UPS control and management is done by Digital Signal Processor (DSP) which is 200 times faster than
standard microprocessors. This helps to make your UPS smarter. DSP uses all the sources on optimum
conditions, observes the failure conditions, and communicates with your computer system.

UPS can be operated in one of the following operational modes depending on the condition of mains
voltage, battery, load, UPS status or user preference.

You may see the block diagram of UPS in Appendix-6 Description of UPS and Block Diagram.

4.1. Online Mode

Energy is drawn from the mains voltage input. Loads are supplied through the rectier and the inverter. The
AC voltage at the input is converted to a DC voltage by the rectier. The inverter converts this DC voltage to
an AC voltage with a stable sinusoidal waveform, amplitude and frequency. Output voltage and frequency
can be set via front panel. Output voltage is sinusoidal and has a regulated amplitude and frequency. It is
independent from the input voltage. The loads are not aected by the disturbances of the mains voltage.

If the mains voltage and frequency are in an acceptable range, Online Operation is possible.

Check Appendix-4 Technical Specications for Online Operation mode mains voltage limits.

The upper limit of mains voltage is independent from the load percentage and it is Ph-N: 270V. UPS switches
to Battery Operation mode when the mains voltage is over Ph-N: 270V. The mains voltage is required to
decrease below Ph-N: 260V for UPS to return Online Operation.

Online Operation Conditions;

• In case Online Operation is set as operation mode of UPS, the mains voltage is within the limits and/or if there

is no abnormal condition (overheat, overload, failure…etc.) UPS operates in Online Operation. Except for
failures, as soon as the abnormal conditions are eliminated, UPS switches to Online Operation automatically.

• In case Bypass Operation is set as operation mode of UPS and the voltage and frequency is out of the bypass

limits but within the rectier limits, UPS switches to Online Operation.

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4.2. Battery Mode

In this operation, energy is drawn from the batteries. The loads are supplied via inverter. Output voltage is
sinusoidal and has a regulated amplitude and frequency.

Battery voltage should be in acceptable limits and the inverter should be enabled for the UPS to operate
in this mode.

UPS operates in Battery Operation in the following cases:

• While UPS is operating in Online Operation; if frequency/waveform/rms value of mains voltage go beyond
the rectier limits,

• While UPS is operating in Bypass Operation, if frequency/waveform/rms value of mains voltage go beyond
Bypass limits,

• If Inverter enabled: “YES”, Rectier enabled: “NO” are selected through the front panel (Authorisations
Menu for authorized Service Sta).

KEOR T EVO UPS operates with one or several parallel strings of 1 x 60pcs 12VDC battery with common
neutral.

You may see the battery string connection as below;

+

-

n x 12-18 pcs n x 12-18 pcs

POSITIVE STRING

NEUTRAL

POINT

N

NEGATIVE STRING

Two Serial Strings with Central Point – Neutral Potential –

KEOR T EVO UPS operates with one strings of 24 to 36 x pcs 12VDC battery with common neutral

Battery Management and Battery Back-Up Time

When UPS operates in Online or Bypass Operation; it continuously calculates and displays the remaining
back-up time.

Autonomy time depends on battery type, quantity, capacity, situation and load level. UPS stops supplying
the loads if the battery voltage decreases under a specic value.

Battery life depends on some parameters such as battery type, charge-discharge cycle, and depth of dis­charge, ambient temperature, conditions. Please check Technical Specications for the ideal environmental
conditions for the batteries. Using the batteries outside this temperature range will decrease battery opera­tion time and battery life.

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KEOR T EVO

Installation & Operation Manual

4.3. Bypass Mode

UPS transfers the loads automatically to the mains voltage in order to protect them during abnormal condi­tions.

While UPS operates in Online Operation, UPS switches to bypass automatically (in case the mains voltage
and frequency is within the limits of bypass) in the following conditions;

• During start-up

• Bypass Priority

• Inverter Fault

• Prolonged Overload, output short circuit

• High Heatsink Temperature

After these conditions are eliminated, the UPS automatically returns to inverter.

Bypass Operation Voltage Range

The mains voltage is required to be in certain range for Bypass Operation. Voltage tolerance is set 18% of
the output voltage in the factory. For instance; if the output voltage is Ph-Ph: 400V, the tolerance range of
bypass voltage would be Ph-Ph: 328V – 472V. In case the input voltage decreases below Ph-Ph: 328V or in­creases above Ph-Ph: 472V; if UPS runs in Bypass Mode UPS switches to Online Mode Operation; if UPS runs
in Online Mode Operation it cannot switch to Bypass Mode Operation even if a fault occurs. If the batteries
and the inverter are suitable to supply the loads, UPS switches to Battery Mode Operation.

Bypass Mode Operation voltage tolerance limit can be adjusted in certain ranges depends on the cus­tomer’s request on site by Legrand UPS Technical Service Personnel.

To return to Bypass Mode Operation; the mains voltage should turn back to +5V above of lower limit, -5V
down of upper limit of bypass limits. Default settings are Ph-Ph: 333V – 465V for Ph-Ph: 400V UPS.

Prolonged overloads in Bypass Operation may cause the thermal/magnetic pro­tection act. In this case, all loads will be de energized.

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4.4. Eco Mode

Eco Mode Operation can be chosen through the Commands Menu.

The purpose of using this mode is to increase the eciency up to 98% and to provide energy saving; since
the loads are supplied by the mains voltage directly, the loads are unprotected against any possible future
risks. (e.g. surge voltage, etc.). In devices with auxiliary mains supply; energy is drawn from the auxiliary
mains supply.

As long as the mains voltage and frequency within the limits, the load is supplied by the auxiliary voltage
in a controlled manner; double conversion chain is on standby while ensuring the recharge of the batteries.

Eco Mode Operation does not provide perfect stability in frequency/waveform/rms value
of the output voltage as in Online Operation. Thus, the use of this mode should be carefully
executed according to the level of protection required by the application.

This procedure may only be executed by trained Personnel.

During Maintenance Bypass operation; in case of any mains voltage interruption occurs,
all loads on the output will be deenergized. Maintenance Bypass Operation should not be
preferred for long time use.

4.7. Operation with External Maintenance Bypass (Optional)

The external manual maintenance bypass may be installed in the general distribution panel where
KEOR T EVO is installed, or in an external bypass panel that is supplied on request.

This operating mode enables the user to isolate the electronic circuitry of the UPS from the mains voltage
and the load without interrupting the load operation by connecting the loads directly to the bypass utility
supply. This feature is useful while performing maintenance or service and should only be executed by
trained Personnel.

Maintenance Bypass enables the user to isolate the electronic circuitry of the UPS from the mains voltage
and the load without interrupting the load operation by connecting the loads directly to the bypass utility
supply. This feature is useful while waiting service sta and should only be executed by trained Personnel.

UPS switches to another mode in case the mains voltage or frequency goes beyond the Bypass limits.
UPS returns to Eco Mode Operation when the auxiliary voltage returns to the limits.

Eco Mode Operation does not provide electronic short circuit current limitation. If a
short circuit occurs downstream distribution panel supplied by the UPS, the magnetic
protection o the Bypass line MCCB may act if not selective with downstream protection
and all loads will be de energized. Check discrimination applies between upstream and
downstream switchboard.

4.5. No Operation

This mode is used to make settings through Front Panel or by Service Software. To start-up UPS in No
Operation mode; all the circuit breakers must be at “0” position except Q1 Input circuit breaker and Q4
Bypass circuit breaker. In this mode UPS does not apply output voltage to supply the loads. After all settings
done during No Operation Mode, UPS should be restarted for the new service settings to be saved and
valid. It is not necessary to restart UPS for user settings to be valid.

4.6. Operation with Maintenance Bypass

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KEOR T EVO

Installation & Operation Manual

5. Requirement

5.2. Placement

This product meets the safety requirements for devices to be operated in restricted access locations according to EN
60950-1 safety standard, which states that the owner should guarantee the following:

• Access to the equipment can only be gained by service persons or by users who have been instructed about the
reasons for the restrictions applied to the location and about any precautions that shall be taken and,

• Access is through the use of a tool or lock and key, or other means of security and is controlled by the authority
responsible for the location.

• UPS is not designed for outdoor application.

• The equipment and the batteries should not be exposed to direct sunlight or placed near to a heat source.

• Recommended operating temperature and humidity values are listed on the Appendix-1 Technical Specications.

• Avoid dusty environments or areas where dust of conductive or corrosive materials is present.

• The connection and the circuit breakers are at the front of UPS. Leave access at the front of the UPS for maintenance.
(Refer to Figure.4.2-4)

• Air outlets of the UPS are at the front, back sides. Leave access at the front side, back side and from both lateral sides
for battery replacement. (Refer to Figure.5.2-1, 5.2-2, 5.2-3 and 5.2-4)

• Recommended environmental humidity condition is between 20-95% (non-condensing).

The UPS must be placed and stand in a vertical position throughout the transportation.

Use suitable equipment to remove the UPS from the pallet.

The equipment shall be packed properly during transportation. Therefore it is
recommended to keep the original package for future need.

All packing material must be recycled in compliance with the laws in force in the
country where the system is installed.

5.1. Transportation

Environment Requirement

Model (kVA) 10 15 20

Max. dissipation at no load

(W) 144 150 204

(BTU) 491 511 696

Max. dissipation at full load

(W) 578 798 1053

(BTU) 1971 2722 3592

Storage temperatures -25/+55 °C (-13/131 °F) (15-25 °C for maximum battery life)

Working temperature 0/40 °C (32/104 °F) (15-25 °C for maximum battery life)

Maximum relative humidity 95% max. without condensation

Maximum altitude without derating 1.000 m (3.300 ft)

Degree of protection IP 20 (other IP as option)

Colour cabinet RAL 7016@enclosure RAL 9005@front door metal

Table.1

14

Figure.5.2-1

Figure.5.2-4

120 mm900 500 250

A (mm) B (mm) D (mm)C (mm)

Figure.5.2-2 Figure.5.2-3

Air conditioning

ROOM LAYOUT RECOMMENDATION TABLE (for UPS with Internal Battery)

Ventilation

Direction of ventilation is front/sides to back.

The room should be equipped with ventilation system or air conditioning to collect warm air

from the top of the room and provide cool air at the bottom.

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KEOR T EVO

Installation & Operation Manual

The UPS should be mounted on a concrete surface and non-combustible surface.

Ensure the stability of UPS without internal battery and take necessary precautions.

In order to prot from optimal ventilation, the side panels must remain in place for UPS
with internal battery.

Optimal battery life time is reached when battery ambient temperature is kept between
15°C and 25°C. Operating battery at 30°C ambient temperature compared to 20°C will
divide by factor 2 battery life time. Room thermal management as specied above is
then necessary to avoid battery life time reduction. The Battery warranty does not apply
if the temperature in the room exceeds 25°C.

When dual inputs is used:

• Separate Neutral conductor is necessary to be supplied for each input: Common
Mains Input and Auxiliary Mains Input

• The two inputs should be supplied by the same MV/LV transformer source. If this is
not the case, an insulation transformer should be added in the auxiliary mains line
upstream the UPS.

• Separate protection is necessary for each input line.

5.3. Storage

Please store the UPS in an environment where the temperature is between -25

0

C + 550C, no receipt of
direct sunlight, far from the heating, in a dry place.
Environmental humidity must be between 20-95% (non-condensing).
Recommended storage temperature, humidity and altitude values are listed on the Appendix-1 Technical
Specications section.

If the batteries will be stored for longer than 6 months, they shall be charged periodically. Charge period
depends on the storage temperature, as shown below:

• Every 9 months if the temperature is below 20°C,

• Every 6 months if the temperature is between 20°C and 30°C,

• Every 3 months if the temperature is between 30°C and 40°C,

• Every 2 months if the temperature is over 40°C

For long storage duration; please follow up the instructions of installation described in Section 5, start-up
UPS described in Section 6 and charge the batteries at least 10 hours.

5.4. Electrical Requisites

The installation must comply with national installation regulations.
The electrical distribution panels for common mains supply voltage and auxiliary mains supply voltage
inputs must have a protection and disconnection system. Disconnection devices used in these panels
shall disconnect all line conductors simultaneously. The following table shows the recommended size
of common mains supply voltage and auxiliary mains supply voltage input protection devices (thermal,
magnetic and dierential) and the cable cross-sections for the loads.

16

Installation Parameters

Model (kVA) 10 15 20

Phase in/out 3Ph+N+PE / 3Ph+N+PB

Rated output apparent power (kVA) 10 15 20

Rated output active power (kW) 9 13,5 18

Rated input current (A) at 400V nominal input voltage 14 21 28

Maximum input current (A) at 358V input voltage + full load + battery charging 18 26 36

Rated bypass current (A) at 400V nominal input voltage 15 22 29

Maximum bypass current (A) at 400V, 125% overload 10 min 19 28 36

Inverter output current @ 400V (A) 15 22 29

Maximum Inverter output current (A) at 400V, 125% overload 10 min 18 27 36

Overload tolerated by the inverter (with mains power present) (kW)

10 min

12,5 18,75 -

8 min - - 25

1 min 15 22.5 30

Recommended Protection Devices - Rectier/Mains Supply -*

D curve circuit breaker (A) (3 or 4-pole according neutral system) 20 25 32

GG fuse (A) 20 25 32

Recommended Protection Devices – General Bypass/Auxiliary Mains Supply –*

D curve circuit breaker (A) (3 or 4 pole according neutral system) 20 25 32

Maximum I2t supported by the bypass (A2s) (10ms) 6700 11200 15000

Icc max (A) 1200 1500 1700

Protection Devices – Battery Fast Fuse –

Ferrule style high speed fuses and with indicating striker
(High Speed FWP Bussmann Fuse 22x58mm 690VAC (IEC)) (A)

63 63 63

Recommended Protection Devices – Output –

C curve circuit breaker (A) (3 or 4 pole according neutral system) ≤3 ≤4

B curve circuit breaker (A) (3 or 4 pole according neutral system) ≤6 ≤8

Maximum inverter short circuit current for 50 ms: IK1=IK2=IK3 =IF 2.1xIn

Min-Max. Cable Cross-Section for Terminals**

Rectier (mm²) 2.5 – 10 4 – 10 6 – 10

General Bypass (mm²) 2.5 – 10 4 – 10 6 – 10

Battery (+/-/N) (mm²) 2.5 – 10 4 – 10 6 – 10

Output (mm²) 2.5 – 10 4 – 10 6 – 10

Neutral (mm²) 4 – 10 6 – 10 10

Protective Earth/Bonding

Recommended cross section for ground wire
at least half of the section of cable phases AND
shall comply with the standards of the country
(for example NFC 15100 in France).

Leakage Current Protection ***

Minimum 300 mA delayed (Type-B). When
used, the residual current earth leakage
protection system must be common for the
two AC inputs (common & auxiliary mains) and
installed upstream.

Table.2

17

KEOR T EVO

Installation & Operation Manual

*Rectier protection alone should only be considered in the event of separate inputs; if the bypass and
rectier inputs are combined, the general input protection rating (bypass + rectier) must reect the
recommended bypass or general protection rating.

*Recommended discrimination of UPS downstream distribution with inverter short-circuits current (battery
mode).

**Cables must be selected 1.2 times larger than the recommended size for parallel topologies.

***Must be selective with residual current circuit breakers downstream of the UPS connected to the UPS
output. If the bypass network is separate from the rectier circuit, or in the event of parallel UPS, use a single
residual current circuit breaker upstream of the UPS.

If the loads generates high rate of third harmonic current ( THDI > 33% ), the
current on the common mains supply voltage and auxiliary mains supply voltage
input and output neutral conductors may have a value that is 1.5-2 times the
phase value during operation. In this case, size the neutral cables and the input/
output protection adequately.

18

6. Installation

When the UPS is delivered, examine the packaging and product carefully to see if any damage occured during transport.
If either possible or ascertained damage is found report it immediately to:

• The carrier;

• LEGRAND Technical Assistance Center.
Make sure that the unit received corresponds to the material specied on the delivery document. The UPS KEOR T EVO
packaging protects the equipment against mechanical and environmental damages. For greater protection it is also
wrapped in a transparent lm.
Check if the following are provided with the equipment:

• Battery fuses (three pieces)

Before the installation, please check if your UPS is customized following your special
requirements (if any).

6.1. Models and Dimensions

UPS Type Dimension (HxWxD) (mm) Net Weight (Kg) Internal Batteries Type

UPS KEOR-T EVO 10 KVA 1020H 0

102x26.5x80

78 NO Battery

UPS KEOR-T EVO 10 KVA 1020H 1 145 24x9Ah

UPS KEOR-T EVO 10 KVA 1020H 2 168 32x9Ah

UPS KEOR-T EVO 15 KVA 1020H 0 79 NO Battery

UPS KEOR-T EVO 15 KVA 1020H 1 163 30x9Ah

UPS KEOR-T EVO 15 KVA 1020H 2 180 36x9Ah

UPS KEOR-T EVO 20 KVA 1020H 0 84 NO Battery

UPS KEOR-T EVO 20 KVA 1020H 1 185 36x9Ah

Table.3

19

KEOR T EVO

Installation & Operation Manual

Remove the wrap.

Remove the package. Place UPS in the installation area.

Figure.6.2-1

6.2. Unpacking Procedure

Figure.6.2-3

Figure.6.2-2

20

Figure.6.2-5

Remove the side parts which xes the carrier wooden

bar to the pallet. Unload the UPS from the pallet.

Fix the UPS to the ground as shown in the picture.

It is recommended to store the original UPS packaging for future needs.

The equipment may only be installed and commissioned by authorized LEGRAND
UPS Technical Service Sta or authorized LEGRAND distributor Technical Service
Sta.

When the UPS is brought from a cold place to a warmer place, humidity of the air may
condensate in it. In this case, wait minimum for 2 (two) hours before powering the UPS.

KEOR T EVO must be protected from voltage surge with devices that are suited to the installation;
the mains voltage surge must be limited to 2kV. These protective devices must be sized to take
into account all the installation parameters (geographical position whether or not there is a
lightning rod, whether or not there are other suppressors in the electrical installation, etc )

Do not connect the output neutral to the protective ground or protective bonding

Power cables and communication cables shall be installed on trays according to the
standards of the country.

6.3. Installation Procedures and Instructions

Figure.6.2-4

21

KEOR T EVO

Installation & Operation Manual

Make sure that all circuit breakers are “OFF” before starting with the installation.

Figure.6.3.1-1

Figure.6.3.1-2

The power terminals are located on the lower rear side of the UPS.
Firstly unscrew the metal cover, afterwards remove the cover of terminals.
After the covers are removed, the cables shall be passed through the cable glands and attached under
the terminals. After all connections done, replace the cover.

6.3.1. Power Connections of Single Systems

Rear view of KEOR T EVO UPS

Remove the cover of terminals.

22

Figure.6.3.1-3

Figure.6.3.1-4

Power Cables Path

Communication Cables Path

23

KEOR T EVO

Installation & Operation Manual

Figure.6.3.1-5

Q1: Common Mains Supply Circuit Breaker
Q2: Output Circuit Breaker
Q3: Maintenance Bypass Circuit Breaker

Q4: Auxiliary Mains Supply Circuit Breaker
F5: Battery Fast Fuse
Q6: Inrush Circuit Breaker

KEOR T EVO 10-15-20kVA (3Ph Input – 3Ph Output) Circuit Breakers

24

X5 EXTERNAL BATTERY

X2 OUTPUT

PB

-

N

+

PE

X2/L1

X2/L2

X2/L3

X2/N

KEOR T EVO 10-15-20kVA (3Ph Input – 3Ph Output)

Connection if the MAINS and AUX Supply are connected in COMMON

Figure.6.3.1-6

X1 MAINS SUPPLY

X4 AUX SUPPLY

PE X1/L1 X1/L2 X1/L3 X1/N

X4/L1 X4/L2 X4/L3 X4/N

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KEOR T EVO

Installation & Operation Manual

6.3.1.1. Earth Connection

6.3.1.2. Mains Supply (Rectier) Connection

Connections shall be made in the following order;

Figure.6.3.1.1-1

The device shall be earthed for a safe and reliable operation. Connect the PE/
PB ground terminals before connecting any other cable.

The installation and adjustment of distribution panel should be done by specialized
technician.

Input Mains Supply’s Protective Earth terminal

PE of the UPS shall be connected to the ground

with a low impedance connection.

As the Auxiliary Supply Protective Bonding PB
and Input Mains Supply’s Protective Earth PE
terminals are short-circuited inside UPS, it is
not needed any connection.

Load ground should be connected to output

X2/PB terminal of the UPS.

If there is an external battery cabinet present, it
should be grounded via battery X5/PB terminal
of the UPS.

Electrical Characteristics - Rectier Input

Model (kVA) 10 15 20
Rated mains supply voltage (V) 400 (3Ph+N+PE)

Voltage tolerance (V) (ensuring battery recharge)

208-459 (at half Load, without battery recharge)

358-459 (at full Load, with battery recharge)

Rated frequency (Hz) 50/60
Frequency tolerance (Hz) from 45 to 65
Power factor (input at full load and rated voltage) ≥ 0,99

Table.4

26

Connect the phase cables to X1

MAINS SUPPLY: X1/L1 - X1/L2 ­X1/L3 terminals, the neutral to X1
MAINS SUPPLY: X1/N terminal.

Cables must be protected by fuses
or MCCB, refer to Section 5.4

If auxiliary supply exists, remove all bridges. When used, the residual current

earth leakage protection system must be common for the two AC inputs and in­stalled upstream.

According to EN 62040-1, the user should place a warning label on the input distribu­tion panel and the other primary power isolators, in order to prevent the risk of voltage
backfeed.

This label is supplied with the Installation Manual. It indicates:

RISK OF VOLTAGE BACKFEED

• Isolate Uninterruptable Power Supply before working on this circuit.

• Then check for Hazardous Voltage between all terminals including the protective
earth (PE).

WARNING

WARNING

WARNING

EN

IT

FR

RISK OF BACKFEED

BACK FEED RISCHIO

RISQUE DE RETOUR DE TENSION

Before working on this circut

isotale Uninterruptible Power System (UPS),
Then check for hazardous Voltage between
all terminals includig the protective earth
(PE)

Prima di intervenire su questo circuito

isolare I’UPS dalla rete .
Controllare la prensenza di tensioni
pericolose tra tutti i terminali

Avant de travailler sur le circuit électrique

İsoler I’ alimentation sans interruption (ASI)
Puis vérier s’ il y a présense de tension
dangereuse entre toutes les bornes incluat la
connexion de terre.

WARNING

DE

RÜCKSPANNUNG RISIKO

Bevor Sie einen Eingri am Grat
vornehmen trennen Sie die USV - Anlage
vom Netz.

Überprüfen Sie auf geharlichte spanunngen
zwischen den Anschlüssen und der
Shutzerde (PE).

..

..

6.3.1.3. Auxiliary Supply Connection

Electrical Characteristics - Bypass

Model (kVA) 10 15 20

Bypass frequency slew rate 7 Hz/s

Bypass rated voltage Nominal output voltage ±18% (settable)

Bypass rated frequency 50/60 Hz (selectable)

Bypass frequency tolerance ±3Hz

Table.5

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KEOR T EVO

Installation & Operation Manual

Connect the phase cables to X4 AUXILIARY SUPPLY: X4/L1 - X4/L2 - X4/L3 terminals, the neutral to

X4 AUXILIARY SUPPLY: X4/N terminal.

Cables must be protected by fuses or MCCB, refer to Section 5.4

If auxiliary supply exists, remove all bridges. When used, the residual current

earth leakage protection system must be common for the two AC inputs and
installed upstream.

If the batteries are already built-in inside the UPS cabinet; in order to avoid any danger during transportation,
some battery connections are left unconnected.

Thus, remove the left & right covers of UPS; disconnect the side panels’ earth cables. Connect the
unconnected battery cables to the related battery connectors. The unconnected cables are labelled. You
may nd detailed information about battery connection as follows.

There is no need for any further connection, so reconnect the side panels’ earth cables and replace the
covers.

Danger of explosion and re if the batteries of the wrong type are used.

Battery fast fuses shall only be replaced with fuses of the same type and rating.

Internal Battery Connection:

Do not use internal and external battery together!

LETHAL VOLTAGE of nominal 240-432 VDC is present when the external battery

connections are made.

The batteries must be charged min. 10 hours before rst-use.

6.3.1.4. Battery Connection

You may nd more information about KEOR T EVO Models and Battery capacity in Section 5.1. Models and
Dimensions.

28

Figure.6.3.1.4-1

KEOR T EVO 10 1x24pcs 9Ah BATTERY WIRING DIAGRAM

29

KEOR T EVO

Installation & Operation Manual

Figure.6.3.1.4-2

KEOR T EVO 10 1x24pcs 9Ah BATTERY WIRING DIAGRAM

30

Figure.6.3.1.4-3

KEOR T EVO 10 1x24pcs 9Ah BATTERY WIRING DIAGRAM

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KEOR T EVO

Installation & Operation Manual

External Battery Connection:

KEOR T EVO Battery Cabinet comes with the following cables;

• 3 meters 4 x 16mm² power cables for battery connection

• 4 meters 2 x 0.5mm² double insulated cables for external battery breaker position feedback signal

• 4 meters 3 x 1.5mm² double insulated cables for external battery cabinet temperature sensor signal

• 3 x Field-mountable Battery Fast Fuses (rating & type depending on the cabinet model)

• 2.9 meters spiral for power cables for protection

For UPS and External Battery Cabinet Connections, please follow up the instructions below;

• Unplug the cable of Thermal Sensor Board on the UPS.

• Switch all battery cabinets circuit breaker (F5) to “OFF” position.

• Ground: Connect all “PB” on the battery cabinets directly to X5 EXT. BATTERY: “PB” on the UPS.

• Negative String: onnect the “-“on Battery Cabinet #1 to X5 EXT. BATTERY: “-” on the UPS. Connect the

“-“on Battery
Cabinet #2 to X5 EXT. BATTERY: “-” on the Battery Cabinet #1 and so on...

• Positive String: Connect the “+“on Battery Cabinet #1 to X5 EXT. BATTERY: “+” on the UPS. Connect the

“+“on Battery
Cabinet #2 to X5 EXT. BATTERY: “+” on the Battery Cabinet #1 and so on...

• Neutral: Connect the “N “on Battery Cabinet #1 to X5 EXT. BATTERY: “N” on the UPS. Connect the “N“on

Battery
Cabinet #2 to X5 EXT. BATTERY: “N” on the Battery Cabinet #1 and so on...

• External Battery Cabinet Temperature Sensor: Only connect the X7: “X7/1 – X7/2 – X7/3” on the Battery

Cabinet
#1 to X7: “X102/1 - X102/2 - X102/3” on the UPS. (Not extended 25m length is recommended)

Battery Fast Fuses: Mount the battery fast fuses into battery fuse holder on the battery cabinet. (fast fuse

indicator side must be placed upper side of the holder) Do not close the battery circuit breaker!

If battery cabinets not supplied by LEGRAND, it is the installer’s responsibility
to check the electrical compatibility and the presence of appropriate protec­tion devices between the cabinet and KEOR T EVO.

Read the KEOR T EVO Service Manual carefully for Battery Wiring Diagram in

External Battery Cabinet!

To avoid risk of electromagnetic interference separate the battery cables from
Input and Output cables.

Double check the polarity of battery connection!

LETHAL VOLTAGE of nominal 720 VDC is present when the external battery

connections are made.

32

Unplug the cable of Thermal Sensor Board on the UPS

Power Connection of Single Battery Cabinet

Signal Connection of Single Battery Cabinet

Figure.6.3.1.4-8

Figure.6.3.1.4-7

33

KEOR T EVO

Installation & Operation Manual

Make sure that all circuit breakers are at “OFF” position before starting with the
installation.

NEUTRAL SYSTEM :

KEOR T EVO does not modify the neutral system: output neutral system is the same as
input neutral system. Do not connect the output neutral to the protective ground or
protective bounding (PE or PB).

Installation of an external isolation transformer is required when necessary to modify
the neutral.

Connect the phase cable to X2 OUTPUT: X2/L1 – X2/L2 – X2/L3 terminal and the neutral cable to X2
OUTPUT: X2/N terminal.
Cables must be protected by fuses or MCCB, refer to Section 5.4

Electrical Characteristics - Inverter

Model (kVA) 10 15 20

Rated output voltage (selectable) (V) 400 3Ph+N+PB (380/415 congurable)
Output voltage tolerance static load ±1%, dynamic load VF-SS-111 compliant
Rated output frequency (Hz) 50/60 Hz (selectable)
Autonomous frequency tolerance ±0.02% on mains power failure
Harmonic voltage distortion < 2% with linear load, < 4% with non linear load

Table.6

Figure.6.3.1.5-1

Output Connection of UPS

34

To enable the short circuit protection feature of the UPS, each load should be
supplied through a separate circuit breaker chosen according to the load current.
This may provide quick disconnection of the short circuited load and maintain
operation continuity of the other loads.

Each load should be supplied through separate circuit breaker and the cable
cross section should be chosen according to the load current value.

Make sure that the UPS is not overloaded to provide a higher quality supply to
the loads.

6.3.2. Power Connections of Parallel Systems

• The protection devices must be chosen properly as dened in Section 5.4 considering total parallel UPS
power.

• Please check 6.3.1. Power Connections of Single Systems for detailed connection information.

• The cross section and length of the input and output cables must be identical for all units.

• The phase rotation must be the same for each unit connected in parallel and also on any external manual
bypass line.

• Make sure that electrical connections and the communication cabling (CANBUS) have been made as
shown in below diagrams. You may connect all 4pcs parallel UPS following these diagrams.

• For power connection and block diagram; refer to Appendix-6: Description of UPS and Block Diagram.

Parallel conguration must only be activated by LEGRAND UPS Technical Service
Personnel.

CAUTION: Do not remove the communication cables between the UPS’s during
Parallel Operation.

35

KEOR T EVO

Installation & Operation Manual

Figure.6.3.2-1

CANBUS CONNECTION OF TWO PARALLEL UPS

CANBUS CONNECTION OF THREE AND UP TO MAXIMUM 4 UNITS IN PARALLEL

Figure.6.3.2-2

36

2 Password protected menus for SETTINGS and COMMANDS;

Figure.7-1

7.1. Front Panel Segments

Front panel consists of two segments: Colour Touchscreen Graphical Control Panel and UPS Status LED Bar
oers detailed information about UPS.

The front panel is located at the top of the UPS which informs the user about operating status, alarm
conditions and measurements. It also provides access to control commands and user parameters settings.
Main screen image shows the energy ow path and Operation Modes. The information of the current
operation is written at the upper side of the panel. Additionally, the energy ow path is given by a graphical
animation.

7. Human Machine Interface

Energy Flow Diagrams

Menus

Alarms

Measurements Settings

Diagnostics

About

Commands

• Output Power

• Output

• Battery / DC

• Bypass

• Rectifier

• Diagnostics

• Events

• Details

• Piriortiy

• Battery Test

• Authorizations

• Relay Funtions

• Options

• Event Logs

• Frequency Convertor

• Output Voltage

• Output Frequency

• Bypass Voltage Range

• Battery 1/2

• Battery 2/2

• Battery Charge Current

• Auto Battery Test

• Parallel Mode

• Emergency Power OFF

• Generator Mode

• Maintenance Alarm

• Touch Calibration

• Communication options

• Time

• Date

• Language

Password Authorizations

User Password by default: 1111 Service Password: access only to LEGRAND UPS Technical Service Personnel

• Options • Events Logs

• Display Brightness • Output Voltage

• Relay Functions • Output Frequency

• Time • Battery

• Date • Parallel Mode

• Language • ESD

• Priority Mode • Generator Mode

• Battery Test • Communication Options

• Maintenance Alarm

• Authorizations

Table.1

37

KEOR T EVO

Installation & Operation Manual

7.1.1. Colour Graphical Touchscreen

Energy Flow Diagram/Modes Of Operation and Menus are displayed on LCD.

The description of the symbols in the energy ow diagram:

Bypass Input: If Bypass voltage is OK and synchronizes with inverter; it lits Green, If Bypass voltage is

OK and not synchronizes with inverter; it lits Orange.

Rectier Input: If Input voltage is OK, it lits Green.
Rectier: Converts AC voltage at the input into DC voltage. You may reach the rectier measurements

by touching it.

Bypass Line: Shows that the loads are supplied via Bypass and line colour is Orange. If UPS is on Eco

Mode it is Green.

Battery: Shows battery conditions. If it is discharging the indicator goes down, if it is charging the

indicator goes up. You may reach the battery/DC measurements by touching it.

Inverter: Converts DC voltage into AC voltage. You may reach the output measurements by touching

it.

Operation Mode Information: Shows UPS’s current operation mode.
Load: Shows the percentage of the load as numerical and graphical information. If there is overload at

the output the load graphic lits Red. You may reach the output power measurements by touching it.

Menu: You may reach the menus by touching it.
Conguration: It indicates if UPS is in parallel or single operation conguration. In Single Mode; there

is no symbol.

Time: It indicates the time.
Circuit Breaker: It appears if battery Fuse is in “OFF” position or battery fuse has blown. If battery Fuse

is in “ON” position; the circuit breaker icon is not displayed, instead battery capacity percentage is
displayed.

Alarms: If there is an alarm on UPS this icon appears and informs the user by ashing. You may reach

the alarms by touching it.

Exclamation Mark: Indicates that there is a problem where the icon appears.
Transfer: Indicates that transfer to bypass is disabled.
Wrench: Indicates that UPS requires Periodic Preventive Maintenance.
Temperature: Indicates ambient temperature of UPS is too high.
Generator Mode: Indicates UPS operates on Generator Mode.

10

1

2

3

14

5

6

12

14

13

18

4

16

15

8

11

17

7

9

1

2
3

4

5

6

7

8

9

10

11
12

13

14

15
16
17
18

38

Operation Modes of UPS and Energy Flow Diagram;

Online Mode:

Frequency Converter Mode:

Battery Mode:

Bypass Mode:

*Bypass Line is Orange

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KEOR T EVO

Installation & Operation Manual

Eco Mode:

*Bypass Line is Green

Maintenance Bypass Mode:

*Bypass Line is Orange and no battery charging

7.1.2. UPS Status LED Bar

Status LED Bar under the front panel gives information of current UPS status.

No Operation:

You may see the colour code assigned for status of UPS;

• GREEN: Everything is OK on UPS. Load is protected.

• ORANGE: The load is supplied by UPS but an alarm is

active, control is required.

• RED: The load is not supplied by UPS. Emergency exists.

40

7.2. Menu

The related sub-menus under the main Menu can be reached by touching MENU icon while main screen
image is displayed. They provide information to user about the measurements, about the UPS and status
of UPS.

By touching Back icon you may exit from the menu.

You may see the sub-menus as shown below;

7.2.1. Alarms Menu

UPS displays 24 dierent alarms in Alarms menu. For detailed information about alarms please check
Appendix-1-Alarms List.

You may reach sub-menus by touching Menu; Alarms,
Measurements, Settings, Diagnostics, About and Commands.

All active alarms present are displayed on the Alarms screen.

They will appear in red colour and as soon as acknowledged
by touching the hand icon at the right side of the screen, they
switch to gray colour and the buzzer will stop.

In case a new alarm occurs; the buzzer is activated, new alarmit
is displayed in red in addition with the remaining active alarms
already acknowledged. It is necessary to acknowledge again
the new alarm to stop the buzzer, then alarm text switch to
gray colour

41

KEOR T EVO

Installation & Operation Manual

7.2.2. Measurements Menu

It provides useful measurements about the UPS and the load.

You may scroll to right and left by touching right and left keys through Measurements menu.
The screens of MEASUREMENTS menu are as below:

Output load percentage, apparent power, real power
and power factor information of each phase is
displayed.

Output voltage (Ph-N), current, frequency information
of each phase is displayed.

DC Bus and Positive-Negative string of battery voltage
is displayed.

When the battery circuit breaker is closed, it gives just
Battery Voltage measurements.

Charge (+) / Discharge (-) battery current, ambient
temperature and back-up time are displayed.

42

Bypass voltage (Ph-N) and frequency information of
each phase are displayed. If the MAINS and AUX Supply
are connected in COMMON, Rectier and Bypass values
will be the same.

Rectier voltage (Ph-N), current and frequency
information of each phase are displayed. If the MAINS
and AUX Supply are connected in COMMON, Rectier
and Bypass values will be the same.

When the Password Screen appears, enter 1111,
touch ENTER to conrm.

7.2.3. Settings Menu

This menu is the section where all the settings related to UPS usage customization can be done.

User Password must be entered to make changes in this section.

User Password: 1111 (the password cannot be changed)

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KEOR T EVO

Installation & Operation Manual

UPS gives audible warning when alarm occurs. Alarm
voice can be disabled if requested.

UPS gives audible echo when keyboard is used. Key
voice can be disabled if requested.

You can adjust brightness setting of LCD screen.

When you touch the save icon key, a conrmation pop­up bar will appear.

You should touch Yes to save the settings. Touch No to
exit without saving the changes.

You may choose communication options here.

If Modbus is chosen; you may also make Modbus
adjustments.

There are 4 dierent relays and one alarm is assigned
to each relay.

44

There are 7 dierent alarms dened.

By default one alarm is assigned to each relay; however
this can be changed by the user. It is also possible to
assign the same alarm to each of the 4 relays. You may
set each relay via this menu.

When you touch the save icon key, a conrmation pop­up bar will appear.

You should touch Yes to save the settings. Touch No to
exit without saving the changes.

UPS records the event logs with the date and time
information. Thus, the events can be followed
chronologically.

When you touch the save icon key, a conrmation pop­up bar will appear. You should touch Yes to save the
settings. Touch No to exit without saving the changes.

UPS records the event logs with the date and time
information. Thus, the events can be followed
chronologically.

When you touch the save icon key, a conrmation pop­up bar will appear. You should touch Yes to save the
settings. Touch No to exit without saving the changes.

Set the date and time of UPS during pre-setting.

45

KEOR T EVO

Installation & Operation Manual

You may choose the language package installed in
UPS.

When you touch the save icon key, a conrmation pop­up bar will appear. You should touch Yes to save the
settings. Touch No to exit without saving the changes.

When you touch the save icon key, a conrmation
pop-up bar will appear.

You should touch Yes to save the settings. Touch No to
exit without saving the changes.

You may see UPS status here. There are 17 dierent
notications.

When you touch the calendar icon; you may reach
below Event Menu.

7.2.4. Diagnostics Menu

All the alarms/notications are logged real-time and can be reached via this menu.

UPS displays up to 380 last events. Events are stored in EEPROM using FIFO method. Order number of last
occurred event is 001, the oldest event is erased.

You may touch right/left arrow through the menu pages. When you touch any event log, you may reach
the details of it.

46

You may see the logged events with time and date
stamp.

Events are stored in EEPROM using FIFO method.

When you touch any event log, you may reach the
details of it as you see on the side.

You may see the details of the event with event code.

If Technical Support required; taking notes of current event logs would be useful.

You may reach detailed information about events from Appendix-3: Event List.

03.01.2012 21:23

Back

Event descripton

Flags

Rectier reception timeout

0x2940 0x15F0 0xe628 0x0322

Details

[ Online ]

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7.2.5. About Menu

This menu provides information about the UPS itself.

7.2.6. Command Menu

Through this menu; you may send some commands to UPS. User Password must
be entered to make changes in this section.

User Password: 1111 (the password cannot be changed).

You may see the COMMAND Menu’s screen as below;

• UPS: UPS model and nominal power

• Serial: UPS serial number

• UPS output: UPS output voltage (Ph-N / Ph-Ph) and

frequency

• HMI version: Human Machine Interface version

• Inverter version: Inverter rmware version

• Rectier version: Rectier rmware version

When the Password Screen appears, enter 1111,
touch enter to conrm.

48

Via this menu; you may choose operation mode of
UPS as Online or Eco Mode.

If system is congured as Single; you may choose
operation mode of UPS Online or Eco Mode.

When you touch the Save icon key, a conrmation
pop-up bar will appear.

You should touch Yes to save the settings. Touch No to
exit without saving the changes.

Via this menu; you may choose operation mode of
UPS as Online or Bypass Mode.

If system is congured as Parallel; you may choose
operation mode of UPS Online or Bypass Mode. It
would be enough to set the priority on one of the UPS,
all the UPSs will pass to Bypass Mode at the same time.

When you touch the Save icon key, a conrmation
pop-up bar will appear.

You should touch Yes to save the settings. Touch No to
exit without saving the changes.

With this command, UPS battery test feature can
be started. When you touch the Start test key, a
conrmation pop-up bar will appear.

You should touch Yes to start the test; otherwise touch
No. UPS tests the battery automatically once each 90
days.

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8. Communication

Interface connectivity cards allow UPS to communicate in a variety of networking environments and with
dierent type of devices.

Standard and optional communication interfaces are listed below;

Communication Interfaces

Model (kVA) 10 15 20

RS232

RS485 / MODBUS

Dry Contacts

Generator Interface

Remote Emergency Switching Device (ESD) Interface

Internal SNMP / Web Monitoring / e-mail

External SNMP

Standard

Option

Table.2

Inverter and Rectier communication connectors are used for Technical Service only.
Do no not connect RS232 or external SNMP, damage may occur to your equipment and
cancel your warranty.

1 RS485 / Modbus

2 RS232 / External SNMP

3 Remote Emergency Switching Device interface

4 Generator Interface

5 Dry Contacts Interface

Figure. 8 -1

1

2

3 4 5

Internal
SNMP Slot

50

Figure. 8-2

The communication solutions listed below
can be used with this port:

• Monitoring Software (Optional)

• External SNMP Adapter (Optional)

Via SNMP; the information listed below can
be monitored;

• The Latest Battery Test Date

• UPS Information (example: 220V - 50Hz)

• Input Data (Vin, Fin, Vmax etc.)

• Output Data (Vout, Load Percantge...etc.)

• Battery Situation (Vbatt...etc)

8.1. Serial Communication (RS232)

UPS is equipped with Serial Communication
as standard. RS232 cable shall be shielded
and shorter than 25m.

RS232: DSUB-9 male connector with the

following pin layout shall be used on the
UPS side of the connection cable.

RS232 Pin Layout

PIN# Signal Name Signal Description

2 RX Receive Data

3 TX Transmit Data

5 GND Signal Ground

Table.8

Communication Cable Path

Over SNMP communication, battery test can be started or current test can be cancelled. UPS can be shut­down or stand-by (stand-by duration is adjustable). Alarms can be discarded.

If Serial Communication cable is needed, it can be produced according
to the pin conguration described at side.

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UPS output can be switched o immediately by Remote Emergency Switching Device interface (ESD)
connection if desired. A remote latched switch can be used as described in above gure.

Input Function

GEN ON

If the GEN ON input is set by a relay, UPS transfers to Generator Mode, bypass and
battery charging is disabled. Generator icon appears on Energy Flow Diagram
screen. The factory default setting of Generator contact is “Normally open”.

UPS OFF

If the UPS OFF (EPO) input set by an EPO switch, UPS stops generating the output
voltage and stops feeding the load. When the voltage on the digital input is
removed, you have to restart UPS. The factory default setting of ESD contact is
“Normally open”.

Table.9

8.2. Emergency Switching Device and Generator Connections

UPS can be remotely switched o and can be congured for an input supply through genset . For this
purpose, there are two digitals inputs on the Interface card that can activate those functions.

Figure.8.2-1

J2: UPS OFF contact NO conguration.
(No jumper)

J2: UPS OFF contact NC conguration.

52

8.3. Dry Contacts

There are 4 dry contact sockets on the Interface Board. The relays can be programmable from Relay
Functions menu (under Settings menu). “General alarm, Input failure, Battery failure, Output failure, Bypass
active, Output overload, High temperature” alarms can be assigned to the contacts. Each alarm can be
assigned to separate relays but also one alarm may be assigned to all relays.

Each output socket 3-pin and middle pin is xed, the upper pin is normally closed and lower pin is normally
open.

You may see the relay numbers as above.

Maximum voltage to be applied to the relay contacts is 42VAC rms (sinus) or
60VDC. Maximum contact current depends on the applied voltage and the
load characteristic. Both maximum voltage and maximum contact current
corresponding to the applied voltage shall not be exceeded.

Free contact relay connection cables shall have a cross-section of 1.5 mm

2

.

Maximum allowed resistive contact currents for several voltages are given on the table below:

Each relay has both a normally open (NO) and a normally closed (NC) contact. One end of these contacts
is common.

Relay functions are described below:

Relay functions can be changed through front panel.

Applied voltage Maximum contact current for resistive load

Up to 42 VAC 16 A

Up to 20 VDC 16 A

30 VDC 6 A

40 VDC 2 A

50 VDC 1 A

60 VDC 0.8 A

Table.10

Relay Default Function

Relay 1 General Alarm

Relay 2 Input failure

Relay 3 Battery failure

Relay 4 Output failure

Table.11

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MODBUS END JUMPER (J1):

If the UPS is connected at
the end of the bus line ; the
jumper should be congured as
described.

The RS485 dierential line consists of three pins:

• A is inverting pin (TxD-/RxD-)

• B is non-inverting pin (TxD+/RxD+)

• Middle Pin is reference pin (optional GND)

Middle Pin is the reference potential used by the
transceiver to measure the A and B voltages.

The B line is positive (compared to A) when the line is
idle.

8.4. RS485

RS485 with Modbus protocol is used in a wide range of automation systems for Industrial Process

monitoring or for Building Management Systems. This communication link allows monitoring UPS status

and measurements with such systems.

RS485

RS485

AB

Communication Parameters

Baud Rate 2400

Data Bits 8

Stop Bits 1

Parity No Parity

Flow Control No Flow Control

Communication Type RTU

Table.12

DEFAULT MODBUS END

54

9. Operating Procedures For Single Systems

9.1. Preparations

UPS is shipped with 3pcs of battery fast fuses in a plastic package attached to the front side of UPS.
After all connections are completed as described in KEOR T EVO Installation Manual, the battery fuses
must be placed as shown below. The fuses’ indicators should be placed at top. Use only the fuses
delivered with the UPS.

Figure.9.1-1

KEOR T EVO 10-15-20KVA

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Even without connections on UPS terminals, residual voltages may exist on these
terminals and inside the UPS. Do not touch these parts.

If you work on terminals; all circuit breakers in the input/bypass distribution panel,
and all battery circuit breakers (F5 inside UPS and in the external battery cabinet, if
any) should be brought to “OFF” position.

9.2.1. Start-Up UPS With Internal Battery

1. Put the battery fast fuses into the battery circuit breaker on the UPS (F5). Do not close the circuit breaker yet!

2. Switch the auxiliary supply circuit breaker on the distribution panel to “ON” position.

3. Switch the mains supply circuit breaker on the distribution panel to “ON” position.

4. Switch the auxiliary supply circuit breaker on the UPS (Q4) to “ON” position.

5. Switch the mains supply circuit breaker on the UPS (Q1) to “ON” position.

6. Switch the inrush circuit breaker on the UPS (Q6) to “ON” position.

7.Touch Battery icon to see Battery / DC menu measurement. Do not close the battery circuit breakers (F5)

until the DC reaches +/- 372V.

8. Switch the output circuit breaker on the UPS (Q2) to “ON” position.

9. Switch the output circuit breaker on the distribution panel to “ON” position.

Afterwards UPS starts to supply the loads.

9.2.2. Start-Up UPS with External Battery

1. Put the battery fast fuses into the battery circuit breaker on the UPS (F5). Do not close the circuit breaker yet!

2. Switch the auxiliary supply circuit breaker on the distribution panel to “ON” position.

3. Switch the mains supply circuit breaker on the distribution panel to “ON” position.

4. Switch the auxiliary supply circuit breaker on the UPS (Q4) to “ON” position.

5. Switch the mains supply circuit breaker on the UPS (Q1) to “ON” position.

6. Switch the inrush circuit breaker on the UPS (Q6) to “ON” position.

7. Switch the circuit breakers on the external battery cabinet to “ON” position.

8. For the rst start up after external battery cabinet installation, you need to check if no polarity inversion

between battery cabinet and UPS. You can control voltages with multimeter on external battery connection
terminals

9. Touch Battery icon to see Battery / DC menu measurement. Do not close the battery circuit breakers (F5)

until the DC bus reaches +/- 372V.

10. Switch the output circuit breaker on the UPS (Q2) to “ON” position.

11. Switch the output circuit breaker on the distribution panel to “ON” position.

Afterwards UPS starts to supply the loads.

9.2. Commissioning

After all connections and settings have been done, UPS can be started-up.

Do not leave the battery fuse package at the front of UPS. Otherwise the fans would be
blocked and UPS may overheat.

Do not close battery fuse holder F5 before starting Commissioning procedure Section 9.2

Mount the battery fast fuses into battery fuse holder on the UPS. Fast fuses indicators side
must be placed upper side of the holder.

Do not close battery fuse holder F5 before starting Commissioning procedure Section 9.2

56

9.3. Decommissioning

Follow the order written below to decommission the UPS:

1. Switch the output circuit breaker on the distribution panel to “OFF” position.

2. Switch the output circuit breaker on the UPS (Q2) to “OFF” position.

3. Switch the battery circuit breaker on the UPS (F5) to “OFF” position.

4. If exists, switch the circuit breakers on the external battery cabinet to “OFF” position.

5. Switch the mains supply circuit breaker on the distribution panel to “OFF” position.

6. Switch the auxiliary supply circuit breaker on the distribution panel to “OFF” position.

7. Switch the inrush circuit breaker on the UPS (Q6) to “OFF” position.

8. Switch the mains supply circuit breaker on the UPS (Q1) to “OFF” position.

9. Switch the auxiliary circuit breaker on the UPS (Q4) to “OFF” position.

Wait a few minutes till UPS completely turn o.

Even without connections on UPS terminals, residual voltages may exist on these
terminals and inside the UPS. Do not touch these parts.

RISK OF BACKFEED: Before working on UPS terminals, check for Hazardous

Voltage between all terminals including the protective earth (PE).

This procedure may only be executed by trained Personnel.

Some parts inside the UPS including terminals are still energized during maintenance
bypass operation.

All the maintenance operations should be done by authorized LEGRAND UPS
Technical Service Personnel.

During Maintenance Bypass operation; in case any mains voltage interruption occurs,
all loads supplied downstream the UPS will be de-energized. Maintenance Bypass
Operation should not be preferred for long time use.

Maintenance bypass enables the user to isolate the electronic circuitry of the UPS from the mains voltage
and the load without interrupting the load operation by connecting the loads directly to the bypass supply.
This feature is useful while waiting service sta and shall only be executed by trained Personnel.
In order to transfer to Maintenance Bypass without interruption, do the following instruction respectively;

1. On the display, select Menu / Command, enter User password (1111).

2. In page Priority, select Eco Mode, save and conrm, go back to Energy Flow Diagram screen

3. Check that UPS is in Eco Mode operation.

4. Open the front door with the UPS key.

5. Switch the maintenance bypass circuit breaker on the UPS (Q3) to “ON” position.

6. See “M. Bypass Mode” written on LCD of UPS.

7. Switch to “OFF” position the output circuit breaker (Q2), the battery circuit breakers (F5), the breakers on

external battery cabinets if any, the mains supply circuit breaker (Q1) and the inrush circuit breakers (Q6)
on the UPS.

8. Switch the auxiliary supply circuit breaker on the UPS (Q4) to “OFF” position.

9. LCD would be o and the alarms would be silenced.

The loads will be continued to be supplied directly from the mains voltage.

9.4. Maintenance Bypass Commissioning Instructions (Transfer Load Supply from UPS to Internal

Maintenance Bypass)

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9.5. Maintenance Bypass Decommissioning Instructions

In order to transfer the loads from Maintenance Bypass to UPS without interruption, do the following
instruction respectively;

1. Switch the auxiliary supply circuit breaker on the UPS (Q4) to “ON” position, after 30s check if fans are

running.

2. Switch the mains supply circuit breaker on the UPS (Q1) to “ON” position.

3. Switch the inrush circuit breaker on the UPS (Q6) to “ON” position.

4. LCD will be ON. See “M. Bypass Mode” written on LCD of UPS.

5. Switch the circuit breakers on the external battery cabinet to “ON” position.

6. Touch Battery icon to see Battery / DC menu measurement. Do not close the battery circuit breakers (F5)

until the DC bus reaches +/- 372V.

7. Switch the output circuit breaker on the UPS (Q2) to “ON” position.

8. Switch the maintenance bypass circuit breaker on the UPS (Q3) to “OFF” position.

9. Check on Energy Diagram screen that UPS is in Eco Mode operation.

10. On the display, select Menu / Command, enter User password (1111)

11. In page Priority Mode, select Online Mode if requested, save and conrm, go back to Energy Flow

Diagram screen.

12. See “Online Mode” written on LCD.

13. Close the front door of UPS.

58

10. Operating Procedures For Parallel Systems

10.1. Introduction

KEOR T EVO UPS Systems are designed according to high MTBF gures with increased reliability.
To increase the output power or the UPS system availability a second (or more) KEOR T EVO UPS can be
connected in parallel redundant/power. Maximum of 4 identical power KEOR T EVO unit can be connected
in parallel.

You may see the block diagrams of Parallel Systems in Appendix-6: Description of UPS and Block Diagram.

There are two paralleling modes you may choose via Front Panel. You may reach this menu with service

password, only.

10.1.1. Redundancy

The UPS parallel system is redundant when one or more UPS units can be stopped by failure or maintenance
operation without aecting the load supply by the remaining operating UPS units.
N+1 redundancy means than one UPS unit can be stopped without aecting secured load supply.
N+2 redundancy means than up to two UPS unit can be stopped without aecting secured load supply.

Maximum Load per parallel UPS unit to keep redundancy:

Parallel conguration must only be activated by LEGRAND UPS Technical Service
Personnel.

10.1.2. Power Increase

If Power Increase Mode is selected, the total capacity of the system is N times the capacity of each UPS
unit. Maximum load per unit can reach 100% in normal operation. All running UPS units in parallel share
the load equally.

In case of any problem on one of the units, the remaining units may operate in overload and the loads
supplied through bypass after certain time.

Number of Parallel UPS Units

2 3 4

N+1 50% 66% 75%

N+2 ... 33% 50%

Table.13

Redundancy

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CAUTION: Do not remove the communication cables between the UPS’s during

parallel operation.

In case the communication cable is removed or damaged during parallel operation and the communication
is lost then the slave UPS which cannot communicate with the master UPS will disconnect from the output
bus and turn o. The other UPSs will continue normal operation. In such a case, this UPS should be turned
o completely in order to insert its communication cable again and then switched on again.

Start up for “PARALLEL” UPSs not on Maintenance Bypass Mode;

1. Switch the auxiliary supply circuit breaker on the distribution panel to “ON” position.

2. Switch the mains supply circuit breaker on the distribution panel to “ON” position.

3. Switch Q4 (Auxiliary Supply) circuit breakers of all UPSs “ON” position.

4. Switch Q1 (Mains Supply) circuit breakers of all UPSs to “ON” position.

5. Switch Q6 (Inrush) circuit breakers of all UPSs to “ON” position.

6. Touch Battery icon to see Battery / DC menu measurement. Do not close the battery circuit breakers (F5)

until the DC bus reaches +/- 372V.

7. If exists, switch external Battery circuit breaker to “ON” position.

8. Switch Q2 (Output) circuit breakers of all UPSs to “ON” position.

9. If exists, switch the output circuit breakers on the distribution panel to “ON” position (o unit output

switch and OS General Output switch).

Start up for “PARALLEL” UPSs on Maintenance Bypass Mode;

1. Switch Q4 (Auxiliary Supply) circuit breakers of all UPSs “ON” position.

2. Switch Q1 (Mains Supply) circuit breakers of all UPSs to “ON” position.

3. Switch Q6 (Inrush) circuit breakers of all UPSs to “ON” position.

4. LCDs will be ON. See “M. Bypass Mode” written on LCD of all UPS.

5. Touch Battery icon to see Battery / DC menu measurement. Do not close the battery circuit breakers (F5)

until the DC bus reaches +/- 372V.

6. If exists, switch external Battery circuit breakers to “ON” position.

7. Switch F5 (Battery) circuit breakers of all UPSs to “ON” position.

8. Switch Q2 (Output) circuit breakers of all UPSs to “ON” position.

9. If exists, switch the output circuit breakers on the distribution panel to “ON” position (o unit output

switch and OS General output switch).

10. Switch Q3 (Maintenance Bypass) circuit breakers of all UPSs to “OFF” position.

11. If exists, Switch Q ( External Maintenance Bypass) circuit breaker to “OFF” position.

12. See “Online Mode” written on LCDs

10.2. Procedure for Commissioning and Start-Up

If the UPSs are not factory parallel congured; the initially started-up UPS will operate as master and
the remaining UPS’s will operate as slave. According ID numbers dened for each UPS, Master and Slave
messages should be observed on the LCD panel. On the master unit, candidate master UPS is also shown
as CX.

CX represents the best available master candidate UPS among the slave UPSs. X represents the ID number
of this slave UPS. In case the master UPS fails, then this candidate assigned UPS becomes Master.

ID-1 Master / CX Online Mode

Menu

60

CAUTION: Do not try to insert its communication cable while it is operating.

The Redundancy System expects to have at least one more UPS than N value. Otherwise
it shall provide “Redundancy Lost” alarm. The same alarm shall also appear in case:
Load % x (N+1) / N > 100 situation.

10.3. Procedure for Decommissioning

Decommissioning “PARALLEL” UPS without switching to Maintenance Bypass Mode;

1. If exists, switch the output circuit breakers on the distribution panel to “OFF” position (o unit output

switch and OS General Output switch).

2. Switch Q2 (Output) circuit breakers of all Slave to “OFF” position.

3. Switch Q2 (Output) circuit breaker of Master to “OFF” position.

4. Switch F5 (Battery) circuit breakers of all Slave to “OFF” position.

5. If exists, switch external Battery circuit breakers of all Slave to “OFF” position.

6. Switch F5 (Battery) circuit breaker of Master to “OFF” position.

7. If exists, switch external Battery circuit breaker of Master to “OFF” position.

8. Switch Q6 (Inrush) circuit breakers of all Slave to “OFF” position.

9. Switch Q6 (Inrush) circuit breaker of Master to “OFF” position.

10. Switch Q1 (Mains Supply) circuit breakers of all Slave to “OFF” position.

11. Switch Q4 (Auxiliary Supply) circuit breakers of all Slave to “OFF” position.

12. Switch Q1 (Mains Supply) circuit breaker of Master to “OFF” position.

13. Switch Q4 (Auxiliary Supply) circuit breaker of Master to “OFF” position.
Decommissioning “PARALLEL” UPS with switching Maintenance Bypass Mode;

1. Go to Commands menu of Master UPS, enter User password (1111).

2. In page Priority, select Bypass Mode, save and conrm, go back to Energy Flow Diagram screen.

3. Check that UPS is in Bypass Mode operation. See all UPSs switch to Bypass Operation.

4. If exists, Switch Q (External Maintenance Bypass) circuit breaker to “ON” position and keep internal

Maintenance Bypass Q3 circuit breakers of all units to “OFF” position.

5. If External Maintenance Bypass Q is not present , then Switch Q3 (Maintenance Bypass) circuit breakers of

all Slave to “ON” position , then Switch Q3 (Maintenance Bypass) circuit breaker of Master to “ON” position.

6. If exists, switch the output circuit breakers on the distribution panel to “OFF” position (o unit output

switch and OS General Output switch).

7. Switch Q2 (Output) circuit breakers of all Slave to “OFF” position.

8. Switch Q2 (Output) circuit breaker of Master to “OFF” position.

9. Switch F5 (Battery) circuit breakers of all Slave to “OFF” position.

10. If exists, switch external Battery circuit breakers of all Slave to “OFF” position.

11. Switch F5 (Battery) circuit breaker of Master to “OFF” position.

12. If exists, switch external Battery circuit breaker of Master to “OFF” position.

13. Switch Q6 (Inrush) circuit breakers of all Slave to “OFF” position.

14. Switch Q6 (Inrush) circuit breaker of Master to “OFF” position.

15. Switch Q1 (Mains Supply) circuit breakers of all Slave to “OFF” position.

16. Switch Q4 (Auxiliary Supply) circuit breakers of all Slave to “OFF” position.

17. Switch Q1 (Mains Supply) circuit breaker of Master to “OFF” position.

18. Switch Q4 (Auxiliary Supply) circuit breaker of Master to “OFF” position.

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11. Troubleshooting

The aim of this chapter is to identify potential isues, understand the root cause of the problems and provide
solution to them.

11.1. Bypass Voltage Failure Alarm

It means that auxiliary mains supply voltage is out of the limit.
Make sure that the auxiliary mains supply circuit breaker is “ON” and the voltage / frequency is between the
bypass limit.

11.2. Bypass Phase Sequence Wrong Alarm

It means that phase sequence of auxiliary mains supply voltage is not OK. Phase sequence of the auxilary
mains supply should be changed. Please contact the LEGRAND Technical Assistance Center.

11.3. Inverter not sync. with bypass Alarm

Frequency of auxiliary mains supply voltage is beyond the frequency range for online operation or auxiliary
mains supply voltage is out of limit. Check if the auxilary mains supply voltage is in specied limits.

11.4. Input phase sequence wrong Alarm

It means that phase sequence of common mains supply voltage is not OK. Phase sequence of common
mains supply input should be changed. Please contact the LEGRAND Technical Assistance Center.

11.5. Rectier Not Sync. With Input Alarm

Frequency of common mains supply voltage is beyond the frequency range of rectier or common mains
supply voltage is out of limit. Check if common mains supply is in specied limits.

11.6. Dc Voltage Failure Alarms

Any of the DC bus voltages is out of the limit. If you encounter this alarm during start-up, check if the
inrush circuit breaker is at “ON” position. Check polarity of external battery connections if any. If it still exists
contact the LEGRAND Technical Assistance Center.

11.7. ESD active Alarm

It means that Emergency Switching Device (ESD) is activated (digital input “UPS OFF” is set high). Check if
ESD switch is ON or not.

11.8. Ambient temperature high Alarm

It is shown “Ambient temperature high” on Diagnostics Menu. If the ambient temperature is high, it
causes a rise in the internal temperature of UPS and this alarm appears. In this case; the rst thing to do is
cool the environment.

11.9. Overload Alarms

Loads connected to the output of the UPS exceed the nominal power of the unit so it gives “Rectier
overload” and/or “Output overload” alarms. Check if there is an overload and origin, remove the excessive

load. Hence the alarm would switch to o.

Residual voltage and high temperature metal parts inside even if the UPS is
disconnected. Contact may cause electric shock and burns. All operations except
replacing battery fuses shall be carried out by the authorized Legrand UPS Technical
Service Personnel only.

Make sure that the UPS is not overloaded to provide a higher quality supply to the
loads.

62

11.10. Maintenance Bypass Active Alarm

If Maintenance Bypass circuit breaker is brought to “ON” position, this alarm appears. Refer to Section 9.5 to
check if Maintenance Bypass decommissioning procedure has been respected.

11.11. Battery test failure Alarm

UPS tests the batteries periodically. In case the batteries failed in the battery test, this alarm appears.
Perform the test again when the batteries have been charged for min. 10 hours and verify the battery circuit
breaker is at “ON” position.

If the alarm continues, contact to Legrand UPS Technical Service.

11.12. Input Voltage Failure Alarms

If the input voltage is not in specied limits, these alarms appear and In this case UPS operates in Battery
Operation mode. As soon as the mains voltage returns to specied limits, the alarms will dissappear.

11.13. Inverter Temperature High/ Rectier Temperature High Alarms

If temperature of the inverter or rectier block rises, these alarms appear. The reasons can be: overload, fan
failure, high ambient temperature, and dusty environment. If fans failed or any other problem is identied,
contact Legrand UPS Technical Service.

If any other alarm occurs or if the above alarms cannot be cleared, contact Legrand UPS Technical Service.

Please prepare the following information before you contact Legrand UPS Technical Service:

• Ensure you read and apply troubleshooting procedure carefully

• UPS Model Type

• Serial Number

• Firmware version

• Date of failure or problem

• Date of commissionning

• Symptoms of failure or problem

• Customer site address and contact information

• Service contract references if any

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12. Preventive Maintenance

All the maintenance operations should be done by authorized LEGRAND
UPS Technical Service Personnel.

Residual voltage and high temperature metal parts inside even if the UPS
is disconnected. Contact may cause electric shock and burns. All operations
except replacing battery fuses shall be carried out by the authorized LEGRAND
UPS Technical Service Personnel only.

12.2. Battery Fuses

There is a risk to blow battery fuses if the battery circuit breaker is closed before DC bus voltage has not
reached +/- 372 V.
Please check commissioning procedure in Section 9.

Battery fuses should only be replaced with the same rating and type.

Do not open or mutilate batteries. Released electrolyte is harmful to the
skin and eyes.
It may be toxic.

Batteries should always be replaced by authorized LEGRAND UPS Technical
Service Personnel. Danger of explosion and re if incorrect battery type is used.

Risk of electrical shock, injuries and chemical hazard, lethal voltage present.
When replacing batteries, the same quantity and type that were originally
tted should be used.

Batteries must always be disposed of according to local environmental laws.

Preventive Maintenance includes extended control of all the electronic and mechanical components in
UPS and permits to replace components before their end of life to assure optimum availability of your UPS
system for your critical load.

Periodic maintenance also ensures safe and ecient operation of your UPS system.
LEGRAND recommends a minimum yearly periodic maintenance visit by authorized LEGRAND UPS
Technical Service.

12.1. Batteries

The life of batteries strongly depends on the usage and environmental conditions. (ambient temperature,
frequency of mains outage, etc.). There are also other factors like the number of charge-discharge cycles
and discharge depth. Performing battery test can provide you information about battery health condition,
but not to avoid any risk of battery failure during mains outage.

The batteries should be maintained and checked periodically by authorized LEGRAND UPS Technical
Service Personnel and replaced before their end of life.

64

12.3. Fans

The life of fans used to cool the power circuits depends on the usage and environmental conditions
(temperature, humidity, dust, pollution)
Please look at Appendix-4 Technical Specications for detailed environment conditions.
Preventive maintenance and replacement before end of life shall be done by authorized LEGRAND UPS
Technical Service Personnel periodically.

12.4. Capacitors

The life of the DC electrolytic capacitors and AC lter capacitors used for output and input ltering purposes
depends on the UPS usage and environmental conditions.
Preventive maintenance and replacement before end of life shall be done by authorized LEGRAND UPS
Technical Service Personnel periodically.

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No Alarms Description

1 Bypass voltage failure Bypass voltage is out of the limit

2 Bypass phase sequence wrong Phase sequence of bypass mains voltage is not OK

3 Inverter not sync. with bypass

Frequency of bypass voltage is beyond the frequency range for online operation or bypass voltage is out of
limit.

4 Battery breaker open Battery fuses blown or breaker opened by user

5 Battery test failure Battery failure

6 Rectier temperature high Rectier IGBT module temperature high

7 Rectier overload RMS current drawn from any of the input lines exceeds its nominal value.

8 Rectier communication lost Front panel can not communicate with rectier

9 Input voltage failure Input voltage is out of the limit

10 Input phase sequence wrong Phase sequence of input mains voltage is not OK

11 Rectier not sync. with input

Frequency of input mains voltage is beyond the frequency range of rectier or input mains voltage is out of
limit.

12 Rectier not precharged DC voltage not charged by inrush circuit

13 DC voltage failure DC Bus voltage is out of the limit

14 Inverter temperature high Inverter IGBT module temperature high

15 Output overload RMS current drawn from any of the output lines exceeds its nominal value.

16 Inverter DC component high Inverter voltage’s DC component is out of the limit

17 Inverter communication lost Front panel can not communicate with inverter

18 Output DC component high Output voltage’s DC component is out of the limit

19 Output voltage failure Output voltage is out of the limit

20 Output short circuit Short circuit at the output

21 Master communication lost Slave cannot communicate with master

22 Slave not sync. with master Slave lost the synchronization with the master

23 N number failure Parallel UPS count is below the adjusted N number

24 Redundancy lost Parallel system alarm. The total load is more than the redundancy load.

The formula is : Load % > N / (N+1) * 100

25 Ambient temperature high Maximal ambient temperature reached

Appendix-1: Alarms List

66

Appendix-2: Diagnostics List

No Diagnostics Description

1 Bypass active UPS is on Bypass operation.

2 Bypass blocked Bypass is blocked by UPS

3 Bypass disabled Bypass is disabled by user

4 Eco mode active Eco mode is selected

5 Battery test active Battery test is running now

6 Battery discharging Rectier overload and can not feed DC enough or mains failure

7 Ambient temperature high Ambient temperature exceeds the upper limit

8 Rectier passive Rectier is not running now

9 Rectier blocked Rectier is blocked by UPS

10 Rectier disabled Rectier is disabled by user

11 Inverter passive Inverter is not running now

12 Inverter blocked Inverter is blocked by UPS

13 Inverter disabled Inverter is disabled by user

14 Generator mode active Generator friendly operation is activated

15 ESD active Emergency Switching Device interface is activated

16 Maintenance bypass active Maintenance bypass switch is at “ON” position

17 Output breaker open Output circuit breaker is at “OFF” position

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No Events Description

1 Bypass voltage ok Bypass voltage is within its limit.

2 Inv. sync. with Byp. Frequency of bypass mains voltage synchronized with output frequency.

3 Byp. ph. seq. ok Phase sequence of bypass mains voltages is OK.

4 M. Bypass passive Manual bypass switch is at “0” position.

5 Inverter temp. ok Inverter block temperature is within the limits.

6 Inverter load ok RMS current drawn from any of the output lines does not exceed its nominal value.

7 Bypass passive Bypass does not operate now.

8 Inverter active Inverter operates now.

9 Output voltage ok Output voltage is within the limits.

10 Master com. ok There is no communication problem with master UPS.

11 Input voltage ok Input voltage is within the limits.

12 Rec. sync. with Inp. Rectier is synchronized to input frequency.

13 Inp. ph. seq. ok Phase sequence of input voltages is OK.

14 Rectier temp. ok Rectier block temperature is within the limits.

15 Rectier load ok RMS current drawn from any of the input lines does not exceed its nominal value.

16 DC voltage ok DC bus voltage is within the limits.

17 DC voltage ok DC bus voltage is within the limits.

18 Rectier active Rectier operates now.

19 Output breaker closed Output circuit breaker is at “I” position.

20 Batt. test completed Battery test is completed.

21 Redundancy ok All parallel UPS are OK.

22 N number ok All parallel UPS are OK.

23 Rectier enabled Rectier enabled is set as “YES” from front panel.

24 Inverter enabled Inverter enabled is set as “YES” from front panel.

25 Bypass enabled Bypass enabled is set as “YES” from front panel.

26 Eco mode passive Eco Mode enabled is set as “NO” from front panel.

27 Batt. not discharging Battery is not discharging.

28 Ambient temp. ok Ambient temperature is within the limits.

29 Gen. mode passive Generator friendly operation is passive.

30 ESD incactive Emergency Switching Device interface is inactive.

31 Battery test succeed Battery test result is success.

32 Battery breaker closed Battery circuit breaker is at “I” position.

33 Rec. precharged DC bus voltage is equal to input voltage.

34 Inverter com. ok Communication between the inverter and the front panel is OK.

35 Rectier com. ok Communication between the rectier and the front panel is OK.

36 Bypass voltage high Bypass voltage is higher than its limit.

37 Bypass voltage low Bypass voltage is lower than its limit.

38 Inv. not sync. with Byp. Frequency of bypass mains voltage not synchronized with output frequency.

39 Byp. ph. seq. wrong Phase sequence of bypass mains voltages is not OK

40 M. Bypass active Manual bypass switch is “ON”

41 Inverter temp. high Inverter block temperature is very high.

Appendix-3: Event List

68

42 Inverter overload RMS current drawn from any of the output lines exceeds its nominal value.

43 Bypass active UPS is on Bypass Operation.

44 Inverter passive Inverter does not operate now.

45 Output voltage failure Output voltage is beyond its limits

46 Master com. lost This alarm is observed when information ow from master ups is interrupted

47 Input voltage high Input voltage is higher than its limit.

48 Input voltage low Input voltage is lower than its limit.

49 Rec. not sync. with Inp. Frequency of input voltage is beyond the frequency range for bypass operation or bypass mains voltage is very low

50 Inp. ph. seq. wrong Phase sequence of input mains voltages is not OK.

51 Rectier temp. high Rectier block temperature is very high.

52 Rectier overload RMS current drawn from any of the input lines exceeds its nominal value.

53 DC voltage high DC bus voltages are higher than its upper limit.

54 DC voltage low DC bus voltages are lower than its lower limit.

55 Rectier passive Rectier does not operate now.

56 Output breaker open Output Circuit Breaker is at “OFF” position.

57 Batt. test active Battery test is on progress.

58 Redundancy lost

Parallel system alarm. The total load is more than the redundancy load. The formula is :

Load % > N / (N+1) * 100

59 N number failure Parallel system alarm. If the UPS number in parallel is less than the preadjusted N number, that alarm appears.

60 Rectier disabled Rectier enabled is set as “NO” from front panel.

61 Inverter disabled Inverter enabled is set as “NO” from front panel.

62 Bypass disabled Bypass enabled is set as “NO” from front panel.

63 Eco mode active Eco Mode enabled is set as “YES” from front panel.

64 Batt. discharging Battery is discharging.

65 Ambient temp. high Ambient temperature exceeds its upper limit.

66 Gen. mode active Generator friendly operation is activated.

67 ESD active Emergency Switching Device interface is activated.

68 Battery test failure Batteries failed in the battery test.

69 Battery breaker open Battery Circuit Breaker is at “OFF” position.

70 Rec. not precharged DC bus voltage is not equal to input voltage.

71 Inverter com. lost Communication between the inverter and the front panel is lost.

72 Rectier com. lost Communication between the rectier and the front panel is lost.

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Appendix-4: Technical Specications

Tower Model (3Ph/3Ph) KEOR T EVO 10KVA KEOR T EVO 15KVA KEOR T EVO 20KVA

Output Power (VA) 10.000 15.000 20.000

Nominal Active Power (W) 10.000 15.000 20.000

Rectier Input

Nominal Voltage 400V (Ph-Ph) 3Ph+N+PE

Input Voltage Range (VAC) (at 50% Load) 208-459V

Input Voltage Range (VAC) (at full Load, with battery
charging)

-10% , +15%

Frequency (Hz) 45 - 65

Power Factor ≥ 0.99

Bypass Input

Nominal Voltage 400V (Ph-Ph) 3Ph+N+PB

Voltage Tolerance -18%+15% (Customizable)

Frequency Tolerance (Hz) ±3

Transfer Time (ms) <1

Output

Nominal Voltage (VAC) (Ph-Ph) 400V (Ph-Ph) 3Ph+N+PB (380/415 Adjustable)

Power Factor 1

Wave Form Sinusoidal

Frequency (Hz) 50 or 60 (Adjustable)

Frequency Tolerance (Battery Operation) 0.01%

Voltage Regulation (Static) ±1%

Output voltage unbalance at reference unbalance
load

<0.5%

Maximum phase angle variation <0.1°

Crest Factor 2.4:1 2.6:1 2.4:1

Nominal Power (kVA) 10 15 20

Overload Protection (sec) 10 -15KVA: 600 (@ 100 - 125% Load)

20KVA: 480 (@ 100 - 125% Load) @30°C

10-15KVA: 60 (@ 125 - 150% Load)

20KVA: 60 (@ 125 - 150% Load @30°C

THD

V

< 2%

Non-Linear Load < 4%

Battery

Battery Type Maintenance-Free Lead Acid Batteries

Battery String (Blocks) 10KVA: 24-32pcs

15KVA: 30-36pcs

20KVA: 36pcs

Protection

Overload Protection, High Temperature, Input Over Voltage, Input & Output Over Current, Back-Feed Protection,

Intelligent Charging Algorithm - Deep Charge Protection - Battery Test (Automatic / Manual), Short-Circuit Protection

70

Communication*

Standard Interface RS232, ESD, Genset, Modbus, 4 Programmable Relay Contacts

Options USB Converter, SNMP

Environment

Operating Temperature Range (⁰C) 0 - 40

Battery Temperature Range (⁰C) 20 - 25 (Recommended For Longer Battery Life)

Maximum Altitude without Derating (m) 1000

Relative Humidity Range 20-95% (Non-Condensing)

Acoustic Noise (dBA) 52 53 55

Pyhsical

Dimensions (HxWxD) (mm) 1020 x 265 x 800

Weight (kg)
(without battery & transformer)

78 79 84

Paint

RAL 7016@enclosure

RAL 9005@front door metal

Standards

Safety IEC/EN 62040-1

EMC IEC/EN 62040-2

Performance IEC/EN 62040-3

Design

IEC/EN 62040

ISO 9001:2008 - ISO 14001:2004

Protection IP 20 (other IP as option)

* Please contact Legrand or your local authorized distributor for optional communication interfaces.
** The manufacturer reserves the rights to change the Technical Specications and design without notice.

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While reading data through MODBUS, the following addresses can be used. “03 - Read Holding Registers”
must be selected to read the MODBUS data.

We can send commands by using MODBUS. To do that function 06 – Write Single Register must be used.
The data is dened as unsigned words (2 bytes).

Appendix-5: Modbus List

Address Coecient Data Denition Read (R) / Write (W )

100 1 L1 Input Voltage R

101 1 L2 Input Voltage R

102 1 L3 Input Voltage R

103 1 L1 Input Current R

104 1 L2 Input Current R

105 1 L3 Input Current R

106 0,1 Input Frequency R

107 1 L1 Output Voltage R

108 1 L2 Output Voltage R

109 1 L3 Output Voltage R

110 1 L1 Output Current R

111 1 L2 Output Current R

112 1 L3 Output Current R

113 0,1 Output Frequency R

114 1 L1 Output Load Percentage R

115 1 L2 Output Load Percentage R

116 1 L3 Output Load Percentage R

117 1 L1 Bypass Voltage R

118 1 L2 Bypass Voltage R

119 1 L3 Bypass Voltage R

120 1 Positive Battery String Voltage R

121 1 Negative Battery String Voltage R

122 1 Positive Battery String Current R

123 1 Negative Battery String Current R

124 1 Battery / Ambient Temperature R

125 1 Positive DC Bus String Voltage R

126 1 Negative DC Bus String Voltage R

127 1 UPS Conditions and Alarms (***) R

201 1 If “1” is sent then beeper will be on. If “0” is sent then beeper will be o. R/W

202 1 If “1” is sent then a battery test will start. R/W

72

Also we can use addresses 127 to get the UPS status. A decimal value will be received from address 127. If
that value is converted to binary number, the UPS status can be read.

Online Mode

ESD interface is activated

DC Bus voltage is out of limits

General Alarm

Example: Let’s receive 28673 (DEC) from address 127. If that value is converted to binary number,

111000000000001 will be obtained. Then the following status can be read from that number:

bit 0 UPS operates on Online Mode

bit 1 UPS operates on Bypass Mode

bit 2 UPS operates on Battery Mode

bit 3 Output voltage is out of limits

bit 4 Output overload

bit 5 Inverter temperature is high

bit 6 Rectier temperature is high

bit 7 Ambient temperature is high

bit 8 Bypass is not synchronized

bit 9 Maintenance Bypass Breaker is “ON”

bit 10 UPS operates on Green Mode

bit 11 Battery Failure

bit 12 ESD interface is activated

bit 13 DC Bus voltage is out of limits

bit 14 General Alarm

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Appendix-6: Description of UPS and Block Diagram

Name Denition

Q1 Common Mains Supply Circuit Breaker

Q2 Output Circuit Breaker

Q3 Maintenance Bypass Circuit Breaker

Q4 Auxiliary Mains Supply Circuit Breaker

F5 Battery Fast Fuse

Q6 Inrush Circuit Breaker

F1 Rectier Fast Fuse

F2 Inverter Fast Fuse

KREC Rectier Contactor

KINV Inverter Contactor

KBYP Backfeed Contactor

X1 Common Mains Supply Terminals

X2 Output Terminals

X4 Auxiliary Mains Supply Terminals

BYPASS THYRISTOR

In case any inverter fault occurs; Bypass thyristors transfer the supply of the load electronically from inverter to Auxiliary
Mains Supply without any interruption.

RECTIFIER The rectier generates a very constant DC voltage level by drawing current from the input with a power factor close to 1.

INVERTER The inverter generates a very constant AC voltage level at the output by using DC voltage source at the rectier’s output.

BATTERY Supplies the necessary energy when the mains voltage is not available.

74

SEPARATED RECTIFIER AND BYPASS INPUTS FOR SINGLE UPS UNIT

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COMMON RECTIFIER AND BYPASS INPUTS FOR SINGLE UPS UNIT

76

TWO PARALLEL UNITS 1+1 Redundant Conguration with Dual Distribution Input

a1, a2: Mains Supply MCCB 4p
d: Distribution MCCB
b1, b2: Auxiliary Supply MCCB 4p
o1, o2, unit output switch 4p

NOTE :
Q3= Internal Maintenance Bypass can be used when total load < single unit rating (kVA)

Option o1, o2= unit output disconnect switch to enable single unit complete shut down for maintenance
a, b, o should be 4poles unless TN-C distribution is used

In case we have parallel system with internal transformer; it is recommended to install output switches (o)
to enable sequential energizing of the dierent

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Installation & Operation Manual

TWO PARALLEL UNITS 1+1 Redundant Conguration with Single Distribution Input

a1, a2: Mains Supply MCCB 4p
d: Distribution MCCB
o1, o2, unit output switch 4p

NOTE :
Q3= Internal Maintenance Bypass can be used when total load < single unit rating (kVA)

Option o1, o2= unit output disconnect switch to enable single unit complete shut down for maintenance
a, o should be 4poles unless TN-C distribution is used
In case we have parallel system with internal transformer; it is recommended to install output switches (o)

to enable sequential energizing of the dierent transformers.

78

THREE PARALLEL UNITS N+1 Redundant Conguration with Dual Distribution Input

a1, a2, a3: Mains Supply MCCB 4p
b1, b2, b3: Auxiliary Supply MCCB 4p
d: Distribution MCCB
o1, o2, o3 unit output switch 4p
OS: General output switch 4p
Q: External Maintenance Bypass MCCB 4p

NOTE:
Q= External Maintenance Bypass MCCB

OS = general output disconnect switch

Rating = N X unit rating (kVA)

Internal Maintenance Bypass Q3 cannot be used should be locked to avoid any misuse.

Option o1, o2, o3= unit output disconnect switch to enable single unit complete shut down for maintenance
a, b, o, OS, Q should be 4poles unless TN-C distribution is used

In case we have parallel system with internal transformer; it is recommended to install output switches (o)
to enable sequential energizing of the dierent transformers.

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THREE PARALLEL UNITS N+1 Redundant Conguration with Single Distribution Input

a1, a2, a3: Mains Supply MCCB 4p
d: Distribution MCCB
o1, o2, o3 unit output switch 4p
OS: General output switch 4p
Q: External Maintenance Bypass MCCB 4p

NOTE:
Q = External Maintenance By pass MCCB

OS = general output disconnect switch

Rating = N X unit rating (kVA)

Internal Maintenance Bypass Q3 cannot be used should be locked to avoid any misuse.

Option o1, o2, o3= unit output disconnect switch to enable single unit complete shut down for maintenance

a, o, OS, Q should be 4poles unless TN-C distribution is used

In case we have parallel system with internal transformer; it is recommended to install output switches (o)
to enable sequential energizing of the dierent transformers.

Notes

World Headquarters and
Intrernational Department
87045 LIMOGES CEDEX Freance

33 5 55 06 87 87

Fax : [phone]
www.legrandelectric.com

Legrand reserves at any time the right to modify the contents of this booklet and to
communicate, in any form and modality. the changes brought to tehe same.

Installer Stamp

: