CyberPower STP3T10KE User manual

User’s Manual
STP3T10KE
STP3T15KE
STP3T20KE
STP3T30KE
CyberPower Systems Inc.
www.cpsww.com

Smart Tower UPS 10-30KVA User Manual I
Safety Precautions
This manual is about the installation and the operation of UPS (Here after referred as UPS).
Please read this manual carefully before move 、 installation 、 operation and maintenance.
The UPS must be debugged and maintained by professional engineers of manufacturer or qualified
agents. Otherwise, human safety and UPS would be in danger; We do not take the responsibility if the
damage of UPS or human being was caused by users.
UPS is only for commercial / industrial use and not for life long equipment.
APPLICABLE STANDARDS
This product complies with CE 73/23 & 93/68 (low voltage safety) and 89/336 (EMC) , and EMC
standards of Australia and New Zealand (C-Tick) , and the following UPS product standards:
*IEC62040-1-1-General and safety requirements for use in operator access area
*IEC/EN62040-2 EMC requirements CLASS C3
*IEC62040-3 Performance requirements and test methods
Continued compliance requires installation in accordance with these instructions and the use of
manufacturer approved accessories only.
WARNING- High earth leakage current
The earth is critical. Before connect the input supply (include both commonercial power supply and
battery supply) . This equipment must be earthed in accordance to local electrical authority codes of
practice.
Earth leakage current exceeds 3.5 mA and is less than 1000 mA.
Transient and steady-state earth leakage currents, which may occur when starting the equipment,
should be taken into account when selecting instantaneous RCCB or RCD devices.
Residual Current Circuit Breakers ( RCCBs) must be selected insensitive to DC unidirectional pulses
( class A ) and transient current pulses ( RCCBs) .
Note it that the earth leakage currents of the load will also flow across RCCB or RCD.
Components can be maintained by users
All the equipment maintenance and servicing procedures involving internal access need special tools
and should be carried out only by trained personnel. The components that can only be accessed by
opening the protective cover with tools cannot be maintained by user.
This UPS full complies with “IEC62040-1-1-General and safety requirements for use in operator
access area UPS”.Dangerous voltages are present within the battery box. However, the risk of contact
with these high voltages is minimized for non-service personnel. Since the component with dangerous
voltage can only be touched by opening the protective cover with a tool, the possibility of touching high
voltage component is minimized. No risk exists to any personnel when operating the equipment in the
normal manner, following the recommended operating procedures in this manual.
Battery Voltage Higher Than 400Vdc
The battery maintenance and service procedures need internal access with special tools and keys
which should be carried out only by trained persons

Safety Precautions
Smart Tower UPS 10-30KVA User Manual
II
SPECIAL CARES SHOULD BE TAKEN WHEN WORKING WITH BATTERIES OR ASSOCIATED
EQUIPMENT. WHEN CONNECTED TOGETHER, THE BATTERY TERMINAL VOLTAGE WOULD
EXCEED 400Vdc ,AND IT IS POTENTIALLY LETHAL.
Battery manufacturers supply details of all necessary precautions of battery banks usage and in the
vicinity of the battery banks that should be taken all the time.Togther concern of the the local
environmental recommendations and the provision of protective clothing, first aid facilities, fire-fighting
facilities and firefighting rules
Battery life will be shorter as the enviroment temperature rise up.
Periodical batteries changes make UPS work normally. Ensure enough standby time
When replacing the batteries,using the same type and modal ,and the same quantity.
When batteies connected,
t
he battery terminal voltage will exceed 400Vdc dangerous voltage, to avoid
electric shock accident, when replacing the batteries, please observe the following warning:
1 Wear eye shield, to prevent accidental arc injury eyes;
2 Don't wear a watch,a ring or any similar metal objects;
3 Use insulated tools;
4 Wear protective overalls and rubber gloves;
5 Do not put metal tools or similar metal parts on any battery;
6 Before remove battery connection terminals, disconnected the load on the battery;
7Do not exposed battery on fire,to invoid the explosion danger to humanbeing safety;
8 Do not Short the battery ,it will cause electric shock or fire;
9 If skin touch electrolyte, rinse with water immediately.
Recycle
UPS components containing heavy metals, must be treat as industrial waste after
be scrapped

Smart Tower UPS 10-30KVA User Manual
Contents
III
CONTENTS
Chapter 1 Quick Start................................................................................................................................ 1
1.1 Introduction.................................................................................................................................... 1
1.2 Unpacking &Inspection .................................................................................................................. 1
1.3 Environment Inspection ................................................................................................................. 1
1.4 Installation Inspection .................................................................................................................... 1
Chapter 2 Installation Guidance ................................................................................................................ 2
2.1 Introduction.................................................................................................................................... 2
2.2 Position Selection .......................................................................................................................... 2
2.2.2 Battery Room.............................................................................................................................. 3
2.2.3 Storage ....................................................................................................................................... 3
2.3 Disassembly, Initial Checking and Positioning............................................................................... 3
2.3.1 System Disassembly .................................................................................................................. 3
2.3.2 UPS Composition ....................................................................................................................... 4
2.3.3 Operation Space......................................................................................................................... 4
2.3.4 Front Operation and Rear Operation .......................................................................................... 4
2.3.5 Final Position .............................................................................................................................. 4
2.3.6 Cable Entry................................................................................................................................. 5
2.4 Protection Device........................................................................................................................... 5
2.4.1 Rectifier and Bypass Input.......................................................................................................... 5
2.4.2 Battery ........................................................................................................................................ 5
2.4.3 UPS Output................................................................................................................................. 6
2.5 Power Cables ................................................................................................................................ 6
2.5.1 Maximum stable state current and system cable configuration................................................... 6
2.5.2 Cable Connection ....................................................................................................................... 6
2.5.3 Connection of Battery (Only Applicable to Build-in Battery UPS model)..................................... 7
2.6 Control and Communication Cable ................................................................................................ 8
2.6.1 Battery and Environmental Temperature Detection Dry Contacts (Optional).............................. 9
2.6.2 Remote EPO Input Port (Optional) ............................................................................................. 9
2.6.3 Generator Input Dry Contact (Optional) .................................................................................... 10
2.6.4 BCB Interface (Optional)........................................................................................................... 11
2.6.5 Battery voltage alarm Output Dry Contact Interface (Optional)................................................. 11
2.6.6 Integrated alarm output dry contact Interface (Optional)........................................................... 12
2.6.7 Mains/Commercial power failure alarm Output Dry Contact Interface (Optional)...................... 12
2.6.8 RS232 Port and SNMP Card Port............................................................................................. 13
2.7 Installation Diagram .................................................................................................................. 13
Chapter 3 Operation................................................................................................................................ 15
3.1 Introduction.................................................................................................................................. 15
3.1.1 Work Principle........................................................................................................................... 15
3.1.2 Bypass Module principle........................................................................................................... 15
3.1.3 Battery Temperature Compensation......................................................................................... 16
3.2 Operation Mode ........................................................................................................................... 16
3.2.1 Normal Mode ............................................................................................................................ 16
3.2.2 Battery Mode ............................................................................................................................ 17
3.2.3 Auto-Start Mode........................................................................................................................ 17
3.2.4 Bypass Mode ............................................................................................................................ 17
3.2.5 Maintenance Mode ................................................................................................................... 17
3.2.6 ECO Mode ................................................................................................................................ 17
3.2.7 Frequency Converters Mode .................................................................................................... 17
3.2.8 Parallel connection redundancy mode...................................................................................... 17
3.3 Battery Management ................................................................................................................... 18

Contents
Smart Tower UPS 10-30KVA User Manual
IV
3.3.1 General function ....................................................................................................................... 18
3.3.2 Advanced Functions (Battery Self-test Maintenance)............................................................... 18
3.4 Battery Protection ........................................................................................................................ 18
Chapter 4 Installation of Parallel Operation System................................................................................ 19
Chapter 5 Operating Procedures............................................................................................................. 20
5.1 Power Switches ........................................................................................................................... 20
5.2 UPS Start-up................................................................................................................................ 20
5.2.1 Normal Start Mode.................................................................................................................... 20
5.2.2 Battery Module Start
（ Only Applicable for the UPS with Battery Cold Start Elements ） ....... 22
5.3 Procedures of Switch between Operation Modes........................................................................ 22
5.3.1 Procedure of Switch the UPS into Battery from Normal Mode.................................................. 22
5.3.2 Procedure of Switch the UPS into Bypass from Normal Mode ................................................. 22
5.3.3 Procedure of Switch the UPS into Normal from Bypass Mode ................................................. 22
5.3.4 Procedure of Switch the UPS into a Maintenance Bypass from Normal Mode......................... 23
5.3.5 Procedure of Switch the UPS to Normal from a Maintenance Bypass Mode............................ 23
5.4 Procedure of Completely Power the UPS down .......................................................................... 23
5.5 EPO Procedure............................................................................................................................ 23
5.6 Language Selection ..................................................................................................................... 24
5.7 Password Control ........................................................................................................................ 24
Chapter 6 Operator Control and Display Panel ....................................................................................... 25
6.1 Introduction.................................................................................................................................. 25
6.1.1 LED Indicator............................................................................................................................ 26
6.1.2 Audible Alarm (buzzer) ............................................................................................................. 26
6.1.3 Functional Keys ........................................................................................................................ 26
6.2 LCD Display Type........................................................................................................................ 27
6.2.1 Default Screen .......................................................................................................................... 27
6.2.2 Data Screen.............................................................................................................................. 27
6.2.3 Setting Display screen .............................................................................................................. 28
6.2.4 Function screen ........................................................................................................................ 28
6.2.5 State Screen............................................................................................................................. 28
6.2.6 Confirm screen ......................................................................................................................... 29
6.2.7 History Record Display ............................................................................................................. 29
6.3 Detailed Description of Menu Items............................................................................................. 29
6.4 Alarm List..................................................................................................................................... 30
Chapter 7 Maintenance ........................................................................................................................... 32
7.1 Instruction of Maintenance Operation.......................................................................................... 32
7.1.1 Precautions............................................................................................................................... 32
7.1.2 Instruction to Bypass Module.................................................................................................... 32
Chapter 8 Product Specification .............................................................................................................. 33
8.1 Applicable Standards................................................................................................................... 33
8.2 Environmental Characteristics ..................................................................................................... 33
8.3 Mechanical Characteristics.......................................................................................................... 33
8.4 Electrical Characteristics (Input Rectifier) .................................................................................... 34
8.5 Electrical Characteristics (Intermediate DC Link)......................................................................... 34
8.6 Electrical Characteristics (Inverter Output) .................................................................................. 34
8.7 Electrical Characteristics(Bypass Mains Input)............................................................................ 35
8.8 Efficiency ..................................................................................................................................... 36

Smart Tower UPS 10-30KVA User Manual
Chapter 1 Quick Start
1
Chapter 1 Quick Start
1.1 Introduction
This chapter describes the basic principles of UPS installation and commission; it helps users to
achieve a rapid installation and commissioning
1.2 Unpacking &Inspection
Check the following items after receiving the products.
1. Check that the package is intact. If there is any damage or humidification, please contact the local
agents or offices.
2. Check the outer type designation label in consistence with the booked product. If not, please contact
the local agents or offices.
3. Check if there is no water inside the package and any damage or crack to the shell. If not, please
contact the local agents or offices.
4. Check that the nameplate is the same as the outer type designation label. If not, please contact the
local agents or offices.
5. Check whether the internal accessories are complete. If not, please contact the local agents or
offices.
1.3 Environment Inspection
Confirm the items as following before UPS installation.
1. Check the environment temperature, if above 25 ,please add cool system. ℃
Note: Environment temperature above 20 , b ℃ attery life reduces half every each 10 up. ℃
2. If the operation environment temperature is below 0 or not, add heat equipment if yes.. ℃
3. If the UPS operation environment humidity is above 90% or condensation, please add additional
protection.
4. Whether there is sunshine or external species invasion in the UPS operation environment, please
add additional protection.
5. If there is dust, inflammable and explosive gas in UPS operation environment, please add additional
protection.
1.4 Installation Inspection
After installation, check the items as below:
1. If the UPS is installed on inflame retarding material?
2. All the cables connected correctly
3. All the grounded system connected correctly.
4. If the operation space around UPS enough.
5. Confirm all the UPS external terminals are tight, and the torque should meet the requirements.
6. Confirm that there are no screws, cables and other electric conductor left inside the UPS. If there is,
please take out.

Chapter 2 Installation Guidance
Smart Tower UPS 10-30KVA User Manual
2
Chapter 2 Installation Guidance
2.1 Introduction
This chapter introduces UPS installation, as particularity of every installation condition. This chapter
just provides guidance of the general installation procedures and methods. Please installation engineers
operate according to difference for each place,
Warning-Installation can only be done by authorized engineers
1. Do not apply electrical power to the UPS equipment before the approval of commissioning
engineer.
2. The UPS should be installed by a qualified engineer in accordance with the information contained in
this chapter.
Note: 3-Phase 4-Wire Input Power is required
The standard UPS can be connected to TN, TT and IT AC distribution system (IEC60364-3) of
3-phase 5-wire
WARNING: battery hazards
SPECIAL CARE SHOULD BE TAKEN WHEN WORKING WITH THE BATTERIES ASSOCIATED
WITH THIS EQUIPMENT. When connecting the battery, the battery terminal voltage will exceed
400Vdc and is potentially lethal.
Eye protection should be worn to prevent injury from accidental electrical arcs.
Remove rings, watches and all metal objects.
Only use tools with insulated handles.
Wear rubber gloves.
If a battery leaks electrolyte, or is otherwise physically damaged, it must be replaced, stored in a
container resistant to sulfuric acid and disposed of in accordance with local regulations.

If electrolyte comes into contact with the skin, the affected area should be washed immediately
with water.
2.2 Position Selection
2.2.1 Power Distribution Room
The UPS is designed for indoor installation, and it should be located in a clean environment with
adequate ventilation to keep the environmental temperature within the required specification parameter.
The UPS internal fans provide forced draft cooling, cold air flow through the front grille into the internal of
UPS, and exhaust hot air from the back grille. Do not block ventilation hole.
If necessary, install some indoor exhaust fans to avoid temperature increase.
In dusty environment, it is better to install air filter, optional component of UPS
Note: The UPS should be installed only on concrete surface or other surface that is solid and
not combustible.

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Chapter 2 Installation Guidance
3
2.2.2 Battery Room
The batteries will generate a small amount of hydrogen and oxygen at the end of charging, so keep
the batteries installation environment adequate fresh air ventilation must meet EN50272-2001
requirements.
The ambient temperature of the batteries should be stable. Environment temperature is the main
factor influent batteries capacity and life.
The batteries standard operation temperature is 20°C. Above this temperature, it will reduce the
battery life, and below this temperature it will reduce the battery capacity.
If the average operation temperature of battery is increased from 20ºC to 30ºC, then the life of the
battery will be reduced by 50%. If the operating temperature of the battery is above 40ºC, then the battery
life will be decreased in exponent rate.
In normal situation, the battery allowing temperature should be at 15°C to 25°C. Keep batteries far
away from heat and air vents.
UPS use external batteries, and the battery protection device (a DC circuit breaker) must be
mounted close to batteries as possible. Between it with batteries, use the shortest power cables
connection distance.
2.2.3 Storage
If there is no need to install the UPS immediately, must be kept the UPS inside a room so as to
protect it against too wet or too hot environment.
The battery needs to be stored in a dry and cool place with good ventilation. The most appropriate
storage temperature is 20 ºC ~ 25ºC.
2.3 Disassembly, Initial Checking and Positioning
When the product is delivered to the user after the first inspection, packaging, determine the intact;
and then open the package, check the equipment integrity; if damaged, please immediately notify the
carrier.
2.3.1 System Disassembly
Open the wooden case first, and then take out the foam pay attention not to scratch the UPS
Fig 2-1 UPS Packing Diagram
Tip: After disassembly, as shown in Figure 2-1, remove the bolts that connect to the UPS
cabinet and wooden Cashion, then lift the UPS cabinet to the installation position. The
dismantlement should be careful so as not to scratch the UPS.

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Smart Tower UPS 10-30KVA User Manual
4
After the carton opening, verify the product label and confirm the correctness of the equipment. The
equipment label is attached on the back and front door which show the UPS model, capacity and main
parameters.
Warm Tips: Please dispose the wasted material in accordance to
environmental protection requirements after disassembly.
To prolong the service life, the UPS location shall be selected to ensure:
convenient wiring
Sufficient space for operation
good ventilation , enough for UPS heat dissipation
No ambient corrosive gases
Not damp and no heat sources
Not dusty
Meet the fire protection requirements
The operating environment temperature is 20 ℃ -25 ℃ ,the batteries maximum efficiency temperature
range (for the information about the battery storage and transportation as well as the environment,
please refer to table 7-2)
2.3.2 UPS Composition
UPS compositions refer to fig 2-2.
a. 10KVA~30KVA cabinet without built-in battery b.10KVA~30KVAcabinet with built-in battery
Fig 2-2 UPS Component Diagram
2.3.3 Operation Space
As UPS has no ventilation grills at either side, no clearance is required for the sides.
For the convenience of daily operation tightening the power supply terminals in the UPS cabinet, with
the exception meet the local requirements, enough space also should be retained for the cabinet front
and back doors. When the front doors are fully opened, a person can pass through freely. Keep the UPS
cabinet back door distance away from the wall or other cabinet for maintenance more than 800mm.
2.3.4 Front Operation and Rear Operation
The UPS device layout makes the maintenance, diagnosis and repair of the cabinet completely at the
front and rear, thus reducing the side space requirements
2.3.5 Final Position
After UPS has been finally located, ensure the expansion bolts fixing the UPS reliably.

Smart Tower UPS 10-30KVA User Manual
Chapter 2 Installation Guidance
5
2.3.6 Cable Entry
10KVA~30KVA UPS adopts underneath power cable routing.
2.4 Protection Device
For safety, it is recommended to install external circuit breakers or other protective devices in the AC
supply system of the UPS system. This section provides general guidance to the trained and qualified
professionals. Training and qualified professionals should be aware of the equipment to be installed local
wiring regulations and relative knowledge
2.4.1 Rectifier and Bypass Input
Install appropriate over current protective devices in the distribution unit of the commercial power
supply, the installation should be considered the power cable current capacity and the system overload
capacity. It is recommended for general that use specified in table 2-2 current 125% IEC60947-2 tripping
curve C (normal) thermal magnetic circuit breaker.
Note
For IT power system,4-pole protective device must be installed in power input distribution cabinet external of UPS
If install UPS higher input power distribution leakage detecting instrument, the adopted r esidual
current action protector (RCD) must:
Sensitive to DC unidirectional pulses (class A) in the power network
Insensitive to transient current pulses
Normal sensitivity, adjustable in 0.3A ~ 1A
The Residual Current Circuit Breaker (RCCB) must be sensitive to DC unidirectional pulses (class A)
in the network, insensitive to transient current pulses, as shown in fig 2-3 respectively.
Fig 2-3 RCCB sign
2.4.2 Battery
A battery bank contains 40 series batteries, Intermediate (the joint of the 20th and 21st batteries),
elicits a midline, plus the first, the last totally 3 cables connect to UPS terminals. Battery elicited cables
must go through a DC circuit breaker then connect to the relevant UPS terminal rows showing in fig 2-4
as below:
Fig 2-4 Diagram of series batteries connection
F
orty
series
batteries connection

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Smart Tower UPS 10-30KVA User Manual
6
2.4.3 UPS Output
There UPS main output switch was built in; users should install overcurrent protector for each output
branch in the additional distribution cabinet.
2.5 Power Cables
Design the cables according to the descriptions of this section and local regulation of wiring
standards, and consider the environmental conditions. Refer to IEC60950-1 table 3B.
Warning
Prior to the cables connection, confirm be aware of the UPS input and the commercial power switch
positions and states.
Ensure switches are opened, and attach a WARNING label to prevent others to operate the switch.
2.5.1 Maximum stable state current and system cable configuration
Table 2-1 Maximum stable state current and configuration of cable system
System Name
STP3T10KE
STP3T15KE
STP3T20KE
STP3T30KE
Capacity System capacity 10KVA 15KVA 20KVA 30KVA
Cabinet
dimension mm
W*D*H
540*690*1100 (with built-in battery)
280*730*668 (without built-in battery) 320* 781* 788
Main Input Rated current A 15 22.5 30 45
Cable mm2 4 6 10 10
Output Rated current A 15 22.5 30 45
Cable mm2 4 6 10 10
Battery Rated current A 18 26.5 36 53
Cable mm2 6 10 10 16
PE Cable mm2 10 10 16 25
Terminal location shows as Figure 2-13
Warning
FAILURE TO FOLLOW ADEQUATE EARTHING CAN RESULT IN
ELECTROMAGNETIC
INTERFERENCE ( EMI), ELECTRIC SHOCK HAZARD AND FIRE HAZARD
2.5.2 Cable Connection
Important
The operations described in this section must be performed by trained and qualified professionals. If
you have any doubt, please contact with manufacturer local Customer Service & Support department.
After the equipment finally positioned, please refer to the installation diagram following the
procedures as following:
1. Ensure all the input distribution switched off, and disconnect all the UPS internal power, Attach
warning labels on these switches to prevent others to operate.
2. Open the UPS cabinet front door, and remove the cover plate, then the input and output terminals,
battery terminals and earth terminal are visible.

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Chapter 2 Installation Guidance
7
3. Connect the input earth wire to input earth terminal. Note: the earth wire connection should comply
with the local and national regulations
4. When the input of UPS rectifier and bypass adopt a same power supply, AC input cables should be
connected to the UPS input terminal (Main input
A-B-C-N), the output load cables should be
connected to the UPS output terminal (Output A-B-C-N). When there are two ways electric
supply inputs, connect the power cable for UPS rectifier and bypass respectively, main input
terminal of UPS (Main input A-B-C-N) and the input terminal of the bypass, and at the same
time remove the short circuit copper bars of the main and the bypass; For the cable tight,
the required force moment including 30kg (M5), 50kg (M6), 180kg (M8) and 260kg (M10).
Attention ensures the power cable phase sequence consistent and there is no circuit short at any
joint of cable terminals.
5. Connect the battery cables between the UPS battery terminals and the battery switch. ENSURE
battery cable CORRECT polarity connection.
Warning-Hazardous battery terminal voltage exceed of 400Vdc
Ensure the connection from battery terminals to battery Circuit breack and to UPS terminals polarity
consistance: Positive terminal to positive terminal, negative terminal to negative terminal, and
disconnect one or more than one cables every battery layer.Do not connect the cables and the battery
circuit breakers without approval from the trained and qualifiied commissioning engineer.
6. Re-install all the protective cover plates
2.5.3 Connection of Battery (Only Applicable to Build-in Battery UPS model)
The below 30KVA UPS contain battery build-in model, in which there is an internal battery breaker.
At the same time, the UPS also offers external battery connection terminals. When choosing external
battery, it should be added an extra battery breaker between the UPS and the external battery bank
Users can choose below 30KVA UPS with or without build in batteries (40*12AH), Customer can
install the battery and connect the battery cables according to the actual situation. We also provide the
battery cables as an option for customers to choose. The method of build-in batteries connection shown
as following fig. 2-5:

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Smart Tower UPS 10-30KVA User Manual
8
Fig 2-5a Build-in battery connection diagram
The UPS and batteries are connected by Anderson terminals as shown below, according to the mark
of cables, connect cables W404,W405,W406 to K(+),K(N),K(-).
Fig 2-5b Build-in battery connection diagram
2.6 Control and Communication Cable
As shown in fig. 2-6, there are dry contact interfaces (J2-J10), communication interfaces (RS232
interface, 485 interface, and SNMP card interface) and LBS interface.

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Fig 2-6 Dry contact interface and communication interface
There is optional dry contact board, the UPS receives external signal from zero-voltage (dry contacts)
contact signal to bypass module phoenix terminals. Via software program operation, it the signal will be
valid when these contacts shorted with +24V pins. All the control cables must be dual isolated, and they
should be separated to the power cables, within maximum wiring distance 20m~50m,the control cable
section area should be 0.5 to 1.5 mm
2
.
2.6.1 Battery and Environmental Temperature Detection Dry Contacts (Optional)
Input dry contact J2 and J3 can detect the battery and environment temperatures, which can be used
for environment monitoring and battery temperature compensation.
J2 and J3 interfaces diagram is shown in fig 2-7, interface description refer to table 2-2.
J2 J3
Fig 2-7 Temperature dry contacts J2 and J3
Table 2-2 Description of input dry contact J2 and J3
Position
Name
D
escription
J2.1 TEMP_BAT Battery temperature detection
J2.2 GND Power ground
J3.1 TEMP_ENV Environment temperature detection
J3.2 GND Power ground
Note:
Temperature detection requires specified temperature sensor(R25=5KOhm, B25/50=3275), please
confirm with manufacturer, or contact manufacturer local office when ordering.
2.6.2 Remote EPO Input Port (Optional)
The UPS has an Emergency Power OFF (EPO) function which can be activated by pressing the EPO
button on the UPS control panel or through a remote-contact provided by user. The EPO button is
protected by a hinged plastic cover.
J4 is the input port of remote EPO, it does work when NC and +24v are shorted, When the EPO
requires to be triggered, disconnected NC and +24v, or shorted NO and +24v. The port diagram is shown
in Fig 2-8, the port description is shown in table 2-3.

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Smart Tower UPS 10-30KVA User Manual
10
J4
+24V
Fig 2-8 remote EPO input port Diagram
Table 2-3 Description of remote EPO input port
P
osition
Name
D
escription
J4.1 EPO_NC EPO is activated when disconnecting fromJ4.2
J4.2
＋
24V +24V, connect the common terminal of NC and NO
J4.3 EPO_NO EPO is activated when shorting with J4.2
The EPO is triggered by shorting pin 2 and 3 or opening pin 2 and 1 of J4.
If the external emergency stop function is required, J10 is reserved for. The external emergency stop
needs extra shielded cable connect the NO or NC remote switch to the J10 port; if the function is not in
use disconnect the pin 2 and pin 3,and short the pin1and pin2 of J4
Note
1. The UPS emergency stop action will shut down rectifier, inverter and static bypass. However, it
does not internally disconnect the input main power. For the UPS full power down, Disconnect the
upper input switch when trigger the EPO.
2. Pin 1 and 2 of J4 have been shorted before leaving factory
2.6.3 Generator Input Dry Contact (Optional)
J5 is the generator input status interface. Connecting pin 2 of J5 with + 24V power supply, indicates
the generator is connected to the system. The interface diagram is shown in fig 2-9 and interface
description is shown in table 2-4
Fig 2-9 Generator access interfaces and connections Diagram
Generator

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Table 2-4 Maintenance bypass switch and output switch status interface Description
P
osition
Name
D
e
s
cription
J5.1 +24V +24V power supply
J5.2 GEN Connection status of generator
J5.3 GND Power ground
2.6.4 BCB Interface (Optional)
J6 and J7 are battery circuit breaker (BCB) interface. The interface diagram is shown in fig 2-10 and
the interface description is shown in table 2-5.
BCB_DRV
BCB_CON
T
BCB_ONL
Fig 2-10 BCB Interface
Table 2-5 Description of BCB Interface
Location Name Description
J6.1 BCB_DRV BCB drive signal: providing +24V, 20mA drive signal
J6.2 BCB_CONT
BCB contact status
，
connect to BCB’s normal open signal
J7.1 GND Power ground
J7.2 BCB_ONL BCB online input
（
normal open
），
it shows BCB is online when this
signal connects to GND.
2.6.5 Battery voltage alarm Output Dry Contact Interface (Optional)
J8 is an output dry contact interface that outputs battery alarms. When the voltage is lower than set
value, it will provide an auxiliary dry contact signal via the isolation of a relay. The interface diagram is
shown in fig 2-11, and description is shown in table 2-6.
BAT_LOW_NC
BAT_LOW_NO
GND
Fig 2-11 Integrated Battery alarm dry contact interface diagram
Table 2-6 Integrated Battery alarm dry contact interface description

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12
L
ocation
Name
D
escription
J8.1 BAT_LOW_NC
Battery warning relay (normally closed) will be open during warning
J8.2 BAT_LOW_NO
Battery warning relay (normally open) will be closed during warning
J8.3 GND Center of battery warning relay
2.6.6 Integrated alarm output dry contact Interface (Optional)
J9 is a integrated alarm output dry contact interface, when one or more alarms is/are triggered, the
system will send a integrated alarm information, it provides an auxiliary dry contact signal via the isolation
of a relay. The interface diagram is shown in fig 2-12, and description is shown in table 2-7
J9
ALARM_NC
ALARM_NO
GND
Fig 2-12 Integrated alarm dry contact interface diagram
Table 2-7: Integrated alarm dry contact interface description
L
ocation
Name
D
escription
J9.1 ALARM_NC
Integrated warning relay (normally closed) will be open during warning
J9.2 ALARM_NO
Integrated warning relay (normally open) will be closed during warning
J9.3 GND Centre of integrated warning relay
2.6.7 Mains/Commercial power failure alarm Output Dry Contact Interface (Optional)
J10 is a output dry contact interface for mains power failure alarm, when the mains fails, the system
will send a mains failure alarm, to provide an auxiliary dry contact signal via an isolation relay. The
interface diagram is shown in fig 2-13, and the description is shown in table 2-8.
Fig 2-13 Mains failure warning dry contact interface diagram
Table 2-8 Mains failure warning dry contact interface description
L
ocation
Name
D
escription
J10.1 UTI_FAIL_NC
Mains failure warning relay(normally closed) will be open during warning

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Chapter 2 Installation Guidance
13
L
ocation
Name
D
escription
J10.2 UTI_FAIL_NO
Mains failure warning relay( normally open) will be closed during warning
J10.3 GND Centre of mains failure warning relay
2.6.8 RS232 Port and SNMP Card Port
RS232 and RS485 Ports: provide serial data for authorized maintenance or commissioning
engineers, and also can be used for integrated network monitoring system.
SNMP Card Port: be used for field installation the communication option card (SNMP card).
2.7 Installation Diagram

Chapter 2 Installation Guidance
Smart Tower UPS 10-30KVA User Manual
14
a. 10KVA~30KVA wiring diagram (with built-in battery)
b. 10KVA~30KVA wiring diagram (without built-in battery)
Fig 2-13 10~30KVA UPS wiring diagram