Delta NT-15K User manual

www.deltapowersolutions.com
Delta UPS - Ultron Family
User Manual
The power behind competitiveness
NT Series, Three Phase
15/ 30/ 60/ 100 kVA

II
Ultron NT Series
SAVE THIS MANUAL
This manual contains important instructions and warnings that you should
follow during the installation, operation, storage and maintenance of this
product. Failure to heed these instructions and warnings will void the warranty.
Copyright © 2018 by Delta Electronics Inc. All Rights Reserved. All rights of this
User Manual (“Manual”), including but not limited to the contents, information,
and figures are solely owned and reserved by Delta Electronics Inc. (“Delta”).
The Manual can only be applied to the operation or the use of this product. Any
disposition, duplication, dissemination, reproduction, modification, translation,
extraction, or usage of this Manual in whole or in part is prohibited without the prior
written permission of Delta. Given that Delta will continuously improve and develop
the product, changes may be made to the information in this Manual at any time
without obligation to notify any person of such revision or changes. Delta will make
all possible efforts to secure the accuracy and the integrity of this Manual. Delta
disclaims any kinds or forms of warranty, guarantee, or undertaking, either expressly
or implicitly, including but not limited to the completeness, faultlessness, accuracy,
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Table of Contents
III
Table of Contents
Chapter 1 : Important Safety Instructions ------------------------------- 1
Chapter 2 : Introduction ------------------------------------------------------- 4
Chapter 3 : Operation Modes ------------------------------------------------ 5
3.1 Normal Mode (Single) --------------------------------------------- 5
3.2 Back-up Mode (Single) -------------------------------------------- 5
3.3 Reserve AC Supply Mode (Single) ----------------------------- 6
3.4 Maintenance Bypass Mode (Single) ---------------------------6
3.5 Normal Mode (Parallel) -------------------------------------------- 7
3.6 Back-up Mode (Parallel) ------------------------------------------ 8
3.7 Reserve AC Supply Mode (Parallel) --------------------------- 9
3.8 Maintenance Bypass Mode (Parallel) ------------------------10
3.9 Hot Standby Redundancy ---------------------------------------11
3.10 Common Battery ---------------------------------------------------12
3.11 Dry Contacts --------------------------------------------------------13
Chapter 4 : Installation & Wiring -------------------------------------------15
4.1 UPS Mechanism Data --------------------------------------------15
4.2 External Battery Cabinet -----------------------------------------18
4.3 External & Internal Views ----------------------------------------19
4.3.1 15~30kVA (Input: 480Vac; Reserve I/P: 208/ 120Vac;
Output: 208/ 120Vac) ------------------------------------------------------19
4.3.2 60kVA (Input: 480Vac; Reserve I/P: 208/ 120Vac;
Output: 208/ 120Vac) ------------------------------------------------------21
4.3.3 100kVA (Input: 480Vac; Reserve I/P: 208/ 120Vac;
Output: 208/ 120Vac) ------------------------------------------------------23
4.4 Installation Environment and Safety Precaution ----------25
4.5 Electrical Connection Precaution ------------------------------26

IV
Ultron NT Series
4.6 UPS Installation Checklist ---------------------------------------26
4.7 Floor Weight Loading Table -------------------------------------28
4.8 Cable Selection-----------------------------------------------------28
4.9 Electrical Connections --------------------------------------------31
4.9.1 15~30kVA Output 208/ 120Vac Terminal Wiring Diagram
(Only for Dual Input Application) ---------------------------------------31
4.9.2 60kVA Output 208/ 120Vac Terminal Wiring Diagram
(Only for Dual Input Application) ---------------------------------------32
4.9.3 100kVA Output 208/ 120Vac Terminal Wiring Diagram
(Only for Dual Input Application) ----------------------------------------32
4.9.4 UPS Parallel Wiring Diagram (Dual Input) ---------------------------33
4.10 Communication Interfaces (NT-Q Board) --------------------34
4.11 Dry Contact Wiring Diagram (Default Value)----------------35
4.12 RS-485 Pin Assignment ------------------------------------------35
Chapter 5 : External Battery Cabinet -------------------------------------36
5.1 External Battery Cabinet Usage Warnings ------------------36
Chapter 6 : UPS Display and Settings -----------------------------------38
6.1 Control Panel -------------------------------------------------------38
6.2 LCD Display Screen-----------------------------------------------39
Chapter 7 : UPS Operation --------------------------------------------------58
 3UH6WDUWXS3UH7XUQRႇ:DUQLQJV ------------------------58
7.2 Start-up Procedures ----------------------------------------------58
7.2.1 Normal Mode Start-up Procedures (Single) -------------------------58
7.2.2 Battery Mode Start-up Procedures (Single) -------------------------59
7.2.3 Manual Bypass Mode Start-up Procedures (Single) --------------59
7.2.4 Normal Mode Start-up Procedures (Parallel) -----------------------61
7.2.5 Battery Mode Start-up Procedures (Parallel) ------------------------62
7.2.6 Manual Bypass Mode Start-up Procedures (Parallel) ------------63

Table of Contents
V
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Chapter 8 : Optional Accessories -----------------------------------------70
8.1 Input Harmonic Filter ----------------------------------------------70
8.2 Remote Monitor ---------------------------------------------------70
8.3 Monitoring Software ----------------------------------------------70
$SSHQGL[7HFKQLFDO6SHFL¿FDWLRQV ----------------------------------71
Appendix 2 : Warranty --------------------------------------------------------73

1
Ultron NT Series
Chapter 1 : Important Safety Instructions

z This manual contains important instructions that should be followed during in-
stallation and maintenance of the UPS and batteries. Before wiring and opera-
tion, read all instructions thoroughly.

z'RQRWXVHWKH836LQDFRPSXWHUURRPDVGH¿QHGLQWKH6WDQGDUGIRUWKH3UR-
tection of Electronic Computer/ Data Processing Equipment, ANSI/ NFPA 75.

z Install the UPS in a well-ventilated indoor area where is free of conductive con-
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contact with water. The UPS is only suitable for being installed on the concrete
and non-combustible surface. Do not place it outdoors. Please refer to Chapter
4.6 for more information

z The ambient operating temperature should be kept between 0°C ~ 40°C (32°F ~
104°F).

z For each operation mode’s block diagram, please refer to Chapter 3.

z For PERMANENTLY CONNECTED EQUIPMENT application, a readily acces-
sible disconnected device shall be incorporated in the building’s wiring system
for AC Input, AC Output and DC Input. Please refer to Chapter 4.8 for relevant
VSHFL¿FDWLRQV

z For the external terminals that need to connect to the UPS, please refer to
Chapter 4.8 for more information.

z The conduit size shall be 6 inches or other equivalent size. Wiring method shall
be in accordance with the National Electric Code, ANSI/ NFPA 70. When con-
necting to AC and DC wiring terminals, use adequate wire gauge, copper wires
with temperature resistance up to 90°C and lb-in torque force. For more informa-
tion, please refer to Chapter 4.8.

z The external slits and openings in the UPS are provided for ventilation. To en-
sure reliable operation of the UPS and to protect the UPS from overheating,
these slits and openings must not be blocked or covered. Do not insert any ob-
ject into the slits and openings that may hinder ventilation.

z Do not put beverages on the UPS, battery cabinet(s) or any other accessory as-
sociated with the UPS.

Chapter 1 Important Safety Instructions
2

z The UPS is designed to power modern computer loads and associated periph-
HUDOGHYLFHVVXFKDVPRQLWRUVPRGHPVFDUWULGJHWDSHGULYHVH[WHUQDOÀRSS\
drives, etc. Do not connect (1) inductive loads, (2) capacitive loads or (3) life
support equipment to the UPS.

z$OOPDLQWHQDQFHDQGLQVWDOODWLRQVKRXOGEHSHUIRUPHGE\TXDOL¿HGVHUYLFHSHU-
sonnel. The UPS contains high voltage which is potentially hazardous.

z The risk of dangerous high voltage is possible when batteries are still connected
to the UPS even though the UPS is disconnected from AC power sources. Be-
IRUHPDLQWHQDQFHSOHDVHWXUQRႇHYHU\H[WHUQDOEDWWHU\FDELQHW¶VFLUFXLWEUHDNHU
WRFXWRႇWKHEDWWHU\SRZHUIURPWKH836

z Isolate the UPS before working on the circuit. A readily accessible disconnected
device shall be installed.

z Before applying electrical power to the UPS, make sure the UPS is grounded to
avoid a possible risk of current leakage.

z The protective device shall be a four-pole device and shall disconnect all line
conductors and the neutral conductor.

z Battery installation and maintenance instructions shall be provided by the battery
manufacturer.

z Before battery installation and maintenance, ensure that the instructions written
in the battery manufacturer’s installation and maintenance manuals are thor-
oughly followed.

z For information about the maximum battery fault current, please refer to Chap-
ter 5.

z For information about the battery usage, connection, replacement, etc., please
refer to Chapter 5.

z'RQRWGLVSRVHRIWKHEDWWHU\RUEDWWHULHVLQD¿UH7KHEDWWHULHVPD\H[SORGH

zDo not open or damage the battery or batteries. The released electrolyte is
harmful to the skin and eyes and may be toxic.

zA battery can present a risk of electric shock and high short-circuit current. The
following precautions should be observed before replacement of batteries:
1. Remove watches, rings, or other metal objects.
2. Use tools with insulated handles.

3
Ultron NT Series
3. Wear insulating gloves and boots.
4. Do not lay tools or metal parts on the top of batteries.
5. Disconnect the charging source prior to connecting or disconnecting the
battery terminals.
WARNING:
This is a class-A UPS. In a domestic environment, the product may
cause radio interference, in which case, the user may be required to
take additional measures.

zStandard Compliance:
- UL 1778
- FCC47 CFR Part 15, Subpart B, Class A

z Symbol Introduction
Protective grounding terminal: a terminal which must be connected
to earth ground prior to making any other connection to the
equipment.
A terminal to which or from which a direct current or voltage may be
applied or supplied.
This symbol indicates the word 'phase'.

Chapter 2 Introduction
4
Chapter 2 : Introduction
The NT series UPS is a dedicated design for large scales of power systems such
as data centers, communication systems, satellite systems, network rooms, medical
devices, monitoring, safety and emergency systems as well as factory facilities.
The UPS adopts high frequency SPWM (Sinusoidal Pulse-Width Modulation)
inverter technology. The inverter uses an advanced IGBT module capable to
reduce the MTTR (Mean Time to Repair) and easier to be maintained, came with
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product life expectation. The applied MCU simplifies complicated control circuits
and reduces number of components. To improve reliability, the NT series UPS is
designed with the following two functions:
Hot standby redundancy: dual input application.
Parallel redundancy: no need to add external parallel control cards and capable to
parallel up to 8 UPS units.
The LCD display with multi-language graphical interface makes the user easier to
operate. System block diagram and status are also available on the LCD providing
the user with clear operating modes and overall conditions. The user can also
implement long-distance monitoring via various communication ports, computers
and network systems. As a result, direct monitoring and control of the UPS is
available (all messages on the LCD are generated by MCU). With the installation of
the provided exclusive software, UPSentry 2012, a total of 31 UPS units’ status can
be monitored at the same time via only one PC, which greatly reduces manpower
and facilitates centralized control. The circuit boards of the NT Series UPS are
interchangeable which minimizes component inventory management, and the
friendly design of the NT series UPS provides optimal and durable quality power
and enhances the unit’s availability and reliability.

5
Ultron NT Series
Chapter 3 : Operation Modes
There are four basic operation modes for the NT series UPS, either of which can
deliver loads with reliable and high quality power source in any conditions. The
operation modes are described as follows.
3.1 Normal Mode (Single)
Figure 3-1: Normal Mode Block Diagram_ Single Unit
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
LOAD
STATIC SWITCHINVERTERRECTIFIER
Power Flow
Power Flow
In normal mode, DC power, rectifying from AC input power, charges batteries and
powers the inverter that transforms DC power to stable and clean AC power to the
loads (see Figure 3-1).
3.2 Back-up Mode (Single)
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
Power Flow
LOAD
STATIC SWITCHINVERTERRECTIFIER
Power Flow
Figure 3-2: Back-up Mode Block Diagram_ Single Unit

6
Chapter 3 Operation Modes
When the utility AC power fails or unstable voltage occurs, the batteries will instantly
provide DC power to keep continuous operation. Hence, the UPS output will not be
interrupted.
3.3 Reserve AC Supply Mode (Single)
RECTIFIER INPUT
RESERVE
MAINS
BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
LOAD
STATIC SWITCHINVERTERRECTIFIER
Power Flow
Power Flow
Power Flow
Figure 3-3: Reserve AC Power Supply Mode Block Diagram_ Single Unit
When the inverter encounters abnormal situations such as over temperature, long-
time overload, output short circuit, abnormal output voltage and exhausted battery,
the inverter will automatically shut down itself for self-protection. Meanwhile, if the
reserve AC power is normal, the static switch will switch to the reserve AC power
to supply power to the loads without any interruption of power supply. After the
abnormal situations mentioned above are eliminated, the static switch will switch
back to the main AC source (see Figure 3-3).
3.4 Maintenance Bypass Mode (Single)
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
LOAD
STATIC SWITCHINVERTERRECTIFIER
Power Flow
Power Flow
Figure 3-4: Maintenance Bypass Mode Block Diagram_ Single Unit

7
Ultron NT Series
When maintenance is needed and the reserve AC power is normal, the UPS can
be switched from inverter mode to bypass mode manually with continuous power
delivering to the loads. Under such conditions, the internal power will be completely
FXWRႇH[FHSWWKDWWKHWHUPLQDOVDQGPDQXDOE\SDVVEUHDNHUVWLOOKDYHKLJKYROWDJH
As a result, risks will not exist in the UPS so service personnel can perform
maintenance safely (see Figure 3-4).
3.5 Normal Mode (Parallel)
Figure 3-5: Normal Mode Block Diagram_ Parallel Units
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
STATIC SWITCH
INVERTERRECTIFIER
Power Flow
LOAD
UPS 1
UPS 2
Power Flow
Power Flow
Power Flow
Power Flow
Two or more UPS units operating in parallel mode have to satisfy requirements of
the same capacity, output voltage, frequency, and equal load share. If one of the
units fails and its loads are less than the sum of rated-load values of other units in
parallel, the rest of units can share the sum of loads; otherwise, all UPS units will
shut down inverters and switch to the reserve AC power to supply power to the
loads (see Figure 3-5).

8
Chapter 3 Operation Modes
3.6 Back-up Mode (Parallel)
Figure 3-6: Back-up Mode Block Diagram_ Parallel Units
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
Power Flow
LOAD
UPS 1
UPS 2
Power Flow
Power Flow
Power Flow
When the utility AC power fails or other unstable voltage occurs, the batteries will
instantly provide the inverter with DC power to keep continuous operation. Hence,
the UPS output will not be interrupted (see Figure 3-6).

9
Ultron NT Series
3.7 Reserve AC Supply Mode (Parallel)
Figure 3-7: Reserve AC Power Supply Mode Block Diagram_ Parallel Units
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
Power Flow
LOAD
UPS 1
UPS 2
Power Flow
Power Flow
Power Flow
Power Flow
Power Flow
When the inverter is in abnormal situations such as over temperature, long-time
overload, output short circuit, abnormal output voltage and exhausted battery, the
inverter will shut down itself for self-protection. If the reserve AC power is normal,
the static switch of each parallel UPS will switch to the reserve AC power to supply
power to the loads without any interruption of power supply. After the abnormal
situations mentioned above are eliminated, the static switch will switch back to the
main AC source (see Figure 3-7).

10
Chapter 3 Operation Modes
3.8 Maintenance Bypass Mode (Parallel)
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
Power Flow
LOAD
UPS 1
UPS 2
Power Flow
Power Flow
Power Flow
Figure 3-8: Maintenance Bypass Mode Block Diagram_ Parallel Units
When maintenance is needed and the reserve AC power is normal, the parallel UPS
units can be switched from inverter mode to bypass mode manually with continuous
power delivering to the loads. Under such conditions, the internal power will be
completely cut off except that each parallel UPS's terminals and manual bypass
breaker still have high voltage. As a result, risks will not exist in the parallel UPS
units so service personnel can perform maintenance safely (see Figure 3-8).

11
Ultron NT Series
3.9 Hot Standby Redundancy
)RUKRWVWDQGE\UHGXQGDQF\FRQ¿JXUDWLRQV83623LVFRQQHFWHGWRWKHUHVHUYH
AC power of UPS2 (see Figure 3-9). Such configurations could reduce the
SUREDELOLW\RISRZHUFXWRႇDQGLPSURYHWKHTXDOLW\RISRZHUVXSSO\
Figure 3-9: Hot-standby Redundancy Block Diagram
RECTIFIER INPUT
RESERVE
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
RECTIFIER INPUT
MAINS BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
STATIC SWITCHINVERTERRECTIFIER
LOAD
UPS 1
UPS 2
Power Flow
Power Flow
Power Flow
Power Flow
UPS 1 OUTPUT
UPS 2 OUTPUT
RESERVE INPUT
In normal condition, the UPS2 supplies the loads. If the UPS2 fails, the static switch
will switch to UPS1 (the reserve AC power of UPS2) without a break of the power
supply. In order to reduce costs, the O/P of UPS1 could simultaneously connect to
UPS2, UPS3, etc..

12
Chapter 3 Operation Modes
3.10 Common Battery
To save on costs and installation space, the parallel UPS units can share the same
external battery cabinet(s). Please see Figure 3-10.
MANUAL BYPASS
RESERVE INPUT
OUTPUT
STATIC SWITCH
RECTIFIER INPUT
LOAD
BATTERY BANK
BREAKER
BREAKER
BREAKER
RESERVE
MAINS BREAKER RECTIFIER INVERTER
Power flow
Power flow
Power flow
Power flow
MANUAL BYPASS
RESERVE INPUT
RECTIFIER INPUT
BREAKER
BREAKER
RESERVE
MAINS BREAKER RECTIFIER INVERTER
Power flow
Power flow
UPS1
UPS2
Power flow
OUTPUT
STATIC SWITCH
BREAKER
Power flow
Power flow
Figure 3-10: Common Battery Block Diagram
1. When many UPS units share one external battery cabinet, you can’t execute
‘Battery Test’ from the LCD control panel.
 )RUFRPPRQEDWWHU\FRQ¿JXUDWLRQVWKHVHWWLQJVRI‘Battery Capacity AH’ and
‘Battery Charge Current’ shown on the LCD display shall be the actual AH and
the total charge current divided by the total number of the parallel UPS units.
For example:
When two UPS units are in parallel, the capacity of common battery is 100AH
and the charge current is 12A, the settings of ‘Battery Capacity AH’ and
‘Battery Charge Current’ for each UPS should be ‘50AH’ and ‘6A’ respectively.

13
Ultron NT Series
3.11 Dry Contacts
OR
UPS
Figure 3-11
The NT series UPS provides 6 sets of programmable dry contacts that can be set as
Normally Open or Normally Closed. The default settings of the 6 sets of dry contacts
are described as follows.
1. Normal: The UPS runs in normal mode.
2. Reserve: When the inverter is abnormal, it is the reserve AC power to supply
power to the loads.
3. Back-up: When the main AC power is abnormal, it is the batteries to supply
power to the loads.
4. BAT_LOW: When the main AC power is abnormal, it is the batteries to supply
power to the loads and the battery discharging voltage exceeds the setting
values (lower than 330V).
5. RES Fail: When the UPS runs in normal mode and the reserve AC power is
abnormal, the output frequency will be based on the rated frequency.
6. BATT Test Fail: When the battery test is executed, the battery test result shows
abnormalities.
A total of 20 events can be selected to set up the 6 sets of dry contacts. Please refer
to Table 3-1.

14
Chapter 3 Operation Modes
Table 3-1: Dry Contact Event Description
No. Event Description No. Event Description
1UPS Normal 11 5HFWL¿HU,3$EQRUPDO
2Load On Bypass 12 5HFWL¿HU23$EQRUPDO
3Load On Battery 13 Inverter Fuse Failure
4Battery Low 14 Battery Replacement
5Bypass Abnormal 15 UPS Failure
6Battery Ground Fault 16 (PHUJHQF\3RZHU2ႇ
7Battery Test Failure 17 Parallel Communication
Abnormal
8Inverter Overload 18 Manual Bypass On
9Inverter Voltage Abnormal 19 UPS Over Temperature
10 Inverter Short Circuit 20 Battery Over Temperature

15
Ultron NT Series
Chapter 4 : Installation & Wiring
4.1 UPS Mechanism Data
D
W
H
Figure 4-1
836XQLWSUR¿OHGLPHQVLRQVWDEOH
(Input: 480Vac; Reserve I/P: 208/
120Vac; Output: 208/ 120Vac)
Figure 4-1
Rating
(kVA)
Width
(mm)
Depth
(mm)
Height
(mm)
15 600 800 1400
30 600 800 1400
Figure 4-2
Bottom View
(Front)
800702
67
376
R8
15
600