Xtreme Power Conversion NXTi 3P-3P Guide

NXTi 3P-3P Online UPS
20kVA Model
User & Installaon Manual
www.xpcc.com | © 2015 Xtreme Power Conversion Corporaon. All rights reserved. (Rev 6/24/15)

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NXTi 3P-3P User’s Manual
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Table of Contents
Safety and EMC Instrucons.........................................................................3
Transportaon and Storage.............................................................................................................3
Preparaon......................................................................................................................................3
Installaon.......................................................................................................................................3
Standards.........................................................................................................................................4
Installaon and Operaon........................................................................... 4
Unpacking and Inspecon...............................................................................................................4
Rear Panel View...............................................................................................................................5
Single UPS Installaon.....................................................................................................................6
UPS Installaon for Parallel System.................................................................................................7
Soware Installaon........................................................................................................................8
Operaons...................................................................................................8
Buon Operaon.............................................................................................................................8
LED Indicators and LCD Panel..........................................................................................................9
Audible Alarm................................................................................................................................11
Single UPS Operaon.....................................................................................................................12
Parallel Operaon..........................................................................................................................14
Abbreviaon Meaning in LCD Display............................................................................................16
LCD Seng.....................................................................................................................................17
Operang Mode/Status Descripon.............................................................................................24
Fault Code..................................................................................................................................... 32
Warning Indicator..........................................................................................................................33
Warning Code............................................................................................................................... 33
Troubleshoong.........................................................................................34
Storage and Maintenance..........................................................................35
Storage...........................................................................................................................................35
Maintenance..................................................................................................................................35
Specicaons.............................................................................................36

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NXTi 3P-3P User’s Manual
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Safety and EMC Instrucons
Please read carefully the following user manual and the safety instrucons before installing the unit or using the
unit!
Transportaon and Storage
• Please transport the UPS system only in the original package to protect against shock and impact. The UPS
must be stored in the room where it is venlated and dry.
Preparaon
• Condensaon may occur if the UPS system is moved directly from cold to warm environment. The UPS
system must be absolutely dry before being installed. Please allow at least two hours for the UPS system
to acclimate the environment.
• Do not install the UPS system near water or in moist environments.
• Do not install the UPS system where it would be exposed to direct sunlight or nearby heater.
• Do not block venlaon holes in the UPS housing.
Installaon
• Do not connect appliances or devices which would overload the UPS (e.g. big motor-type equipment)) to
the UPS output sockets or terminal.
• Place cables in such a way that no one can step on or trip over them.
• Do not block air vents in the housing of UPS. The UPS must be installed in a locaon with good venlaon.
Ensure enough space on each side for venlaon.
• UPS has provided earthed terminal, in the nal installed system conguraon, equi-potenal earth bond-
ing to the external UPS baery cabinets.
• The UPS can be installed only by qualied maintenance personnel.
• An appropriate disconnect device as short-circuit backup protecon should be provided in the building
wiring installaon.
• An integral single emergency switching device which prevents further supply to the load by the UPS in any
mode of operaon should be provided in the building wiring installaon.
• Connect the earth before connecng to the building wiring terminal.
• Installaon and Wiring must be performed in accordance with the local electrical laws and regulaons.
Operaon
• Do not disconnect the earth conductor cable on the UPS or the building wiring terminals in any me since
this would cancel the protecve earth of the UPS system and of all connected loads.
• The UPS system features its own, internal current source (baeries). The UPS output sockets or output ter-
minal blocks may be electrically live even if the UPS system is not connected to the building wiring outlet.
• In order to fully disconnect the UPS system, rst press the “OFF” buon and then disconnect the mains
• Ensure that no liquid or other foreign objects can enter into the UPS system.
• The UPS can be operated by any individuals with no previous experience.

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NXTi 3P-3P User’s Manual
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Standards
* Safety
IEC/EN 62040-1
* EMI
Conducted Emission...............................:IEC/EN 62040-2 Category C3
Radiated Emission..................................:IEC/EN 62040-2 Category C3
*EMS
ESD.........................................................:IEC/EN 61000-4-2 Level 4
RS...........................................................:IEC/EN 61000-4-3 Level 3
EFT.........................................................:IEC/EN 61000-4-4 Level 4
SURGE...................................................:IEC/EN 61000-4-5 Level 4
CS...........................................................:IEC/EN 61000-4-6 Level 3
Power-frequency Magnec eld..............:IEC/EN 61000-4-8 Level 4
Low Frequency Signals............................:IEC/EN 61000-2-2
Warning: This is a product for commercial and industrial applicaon in the second environment-installaon re-
stricons or addional measures may be needed to prevent disturbances.
Installaon and Operaon
There are two dierent types of online UPS: standard and long-run models. Please refer to the following model
table.
Model Type Model Type
NXTi-20K Standard model NXTi-20KL Long-run model
We also oer oponal parallel funcon for these two types by request. The UPS with parallel funcon is called as
“Parallel model”. We have described detailed installaon and operaon of Parallel Model in the following chapter.
Unpacking and Inspecon
Unpack the package and check the package contents. The shipping package contains:
• One UPS
• One user manual
• One monitoring soware CD
• One RS-232 cable (opon)
• One USB cable
• One parallel cable (only available for parallel model)
• One share current cable (only available for parallel model)
NOTE: Before installaon, please inspect the unit. Be sure that nothing inside the package is damaged during
transportaon. Do not turn on the unit and nofy the carrier and dealer immediately if there is any damage or
lacking of some parts. Please keep the original package in a safe place for future use.

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NXTi 3P-3P User’s Manual
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Rear Panel View
20K/20KL Rear Panel
20K/20KL Input/Output Terminal

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NXTi 3P-3P User’s Manual
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1. RS-232 communicaon port
2. USB communicaon port
3. Emergency power o funcon connector (EPO connector)
4. Share current port (only available for parallel model)
5. Parallel port (only available for parallel model)
6. Intelligent slot
7. Power stage fan
8. External baery terminal(Only available for long-run model)
9. Bypass Input Circuit Breaker(Only available for dual input unit)
10. Input/Output terminal (Refer to Diagram 2)
11. Line Input circuit breaker
12. Maintenance bypass switch
13. Output Grounding terminal
14. Output terminal: connect to mission-crical loads
15. Line input terminal
16. Bypass input terminal(Only available for dual input)
17. Input Grounding terminal
Single UPS Installaon
Installaon and wiring must be performed in accordance with the local electric laws/regulaons and execute the
following instrucons by professional personnel.
1. Make sure the mains wire and breakers in the building are enough for the rated capacity of UPS to avoid
the hazards of electric shock or re.
NOTE: Do not use the wall receptacle as the input power source for the UPS, as its rated current is less than
the UPS’s maximum input current. Otherwise the receptacle may be burned and destroyed.
2. Switch o the mains switch in the building before installaon.
3. Turn o all the connected devices before connecng to the UPS.
4. Prepare wires based on the following table:
Model Wiring spec (AWG)
Input(Ph) Output(Ph) Neutral Baery Ground
20K 8 8 6 –6
20KL 8 8 6 6 6
NOTE 1: The cable for 20K/20KL should be able to withstand over 63A current. It is recommended to use
AWG 8 or thicker wire for Phase and AWG 6 or thicker wire for Neutral for safety and eciency.
NOTE 2: The cable for 30K/30KL should be able to withstand over 63A current. It is recommended to use
AWG 8 or thicker wire for Phase and AWG 4 or thicker wire for Neutral for safety and eciency.
NOTE 3: The selecons for color of wires should be followed by the local electrical laws and regulaons.
5. Remove the terminal block cover on the rear panel of UPS. Then connect the wires according to the fol-
lowing terminal block diagrams: (Connect the earth wire rst when making wire connecon. Disconnect
the earth wire last when making wire disconnecon!)

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NXTi 3P-3P User’s Manual
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Terminal Block wiring diagram of 20K/20KL
NOTE 1: Make sure that the wires are connected ghtly with the terminals.
NOTE 2: Please install the output breaker between the output terminal and the load, and the breaker
should be qualied with leakage current protecve funcon if necessary.
6. Put the terminal block cover back to the rear panel of the UPS.
Warning: (Only for standard model)
• Make sure the UPS is not turned on before installaon. The UPS should not be turned on during wiring
connecon.
• Do not try to modify the standard model to the long-run model. Parcularly, do not try to connect the
standard internal baery to the external baery. The baery type and voltage may be dierent. If you con-
nect them together, it maybe causes the hazard of electric shock or re!
Warning: (Only for long-run model)
Make sure a DC breaker or other protecon device between UPS and external baery pack is installed. If not,
please install it carefully. Switch o the baery breaker before installaon.
NOTE: Set the baery pack breaker in “OFF” posion and then install the baery pack.
• Pay highly aenon to the rated baery voltage marked on the rear panel. If you want to change the num-
bers of the baery pack, please make sure you modify the seng simultaneously. The connecon with
wrong baery voltage may cause permanent damage of the UPS. Make sure the voltage of the baery
pack is correct
• Pay highly aenon to the polarity marking on external baery terminal block, and make sure the correct
baery polarity is connected. Wrong connecon may cause permanent damage of the UPS.
• Make sure the protecve earth ground wiring is correct. The wire current spec, color, posion, connecon
and conductance reliability should be checked carefully.
• Make sure the ulity input & output wiring is correct. The wire current spec, color, posion, connecon
and conductance reliability should be checked carefully. Make sure the L/N site is correct, not reverse and
short-circuited.
UPS Installaon for Parallel System
If the UPS is only available for single operaon, you may skip this secon to the next.
1. Install and wires the UPSs according to the Single UPS Installaon secon.
2. Connect the output wires of each UPS to an output breaker.
3. Connect all output breakers to a major output breaker. Then this major output breaker will directly con-
nect to the loads.
4. Each UPS is connected to an independent baery pack.

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NXTi 3P-3P User’s Manual
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NOTE: The parallel system cannot use one baery pack. Otherwise, it will cause system permanent failure.
5. Refer to the following wiring diagram:
Wiring diagram of parallel system for 20K/20KL
Soware Installaon
For opmal computer system protecon, install UPS monitoring soware to fully congure UPS shutdown.
Operaons
Buon Operaon
Buon Funcon
ON/Enter Buon • Turn on the UPS: Press and hold the buon more than 0.5s to turn on the UPS.
• Enter Key: Press this buon to conrm the selecon in seng menu.
OFF/ESC Buon • Turn o the UPS: Press and hold the buon more than 0.5s to turn o the UPS.
• Esc key: Press this buon to return to last menu in seng menu.
Test/Up Buon
• Baery test: Press and hold the buon more than 0.5s to test the baery while in
AC mode and CVCF* mode.
• UP key: Press this buon to display next selecon in seng menu.
Mute/Down Buon • Mute the alarm: Press and hold the buon more than 0.5s to mute the buzzer.
• Down key: Press this buon to display previous selecon in seng menu.
Test/Up + Mute/Down
Buon
• Press and hold the two buons simultaneous more than 1s to enter/escape the
seng menu.
* CVCF means Constant Voltage and Constant Frequency.

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LED Indicators and LCD Panel
LED Indicators
There are 4 LEDs on front panel to show the UPS working status:
Mode Bypass Line Baery Fault
UPS On ● ● ● ●
No Output mode ○ ○ ○ ○
Bypass mode ● ○ ○ ○
AC mode ○ ● ○ ○
Baery mode ○ ○ ● ○
CVCF mode ○ ● ○ ○
Baery Test ● ● ● ○
ECO mode ● ● ○ ○
Fault ○ ○ ○ ●
Note: ● means LED is lighng, and ○ means LED is faded.
LCD Panel

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Display Funcon
Backup me informaon
Indicates the baery discharge me in numbers
H: hours, M: minutes, S: seconds
Fault informaon
Indicates that the warning and fault occurs.
Indicates the fault codes
Mute operaon
Indicates that the UPS alarm is disabled.
Output & Baery voltage informaon
Indicates the output voltage, frequency or baery voltage. Vac: output voltage, Vdc:
baery voltage, Hz: frequency
Load informaon
Indicates the load level by 0-25%, 26-50%, 51-75%, and 76-100%.
Indicates overload.
Indicates the load or the output is short.
Mode operaon informaon
Indicates the UPS connects to the mains.
Indicates the baery is working.
Indicates the bypass circuit is working.
Indicates the ECO mode is enabled.
Indicates the Inverter circuit is working.
Indicates the output is working.
Baery informaon