KStar YDC9300-RT Series Quick start guide

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All rights reserved.
The information in this document is subject to change without notice.
Publish statement
Thank you for purchasing this series UPS.
This series UPS is an intelligent, three phase in single phase out, high frequency online
UPS designed by our R&D team who is with years of designing experiences on UPS.
With excellent electrical performance, perfect intelligent monitoring and network
functions, smart appearance, complying with EMC and safety standards, The UPS has
become standard product meets the world’s advanced level.
Read this manual carefully before installation
This manual provides technical support to the operator of the equipment

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Contents
1. Safety ····································································································2
1.1 Safety notes ·····································································································2
1.2 Symbols used in this guide···················································································2
2. Main feature····························································································3
2.1 Summarization ··································································································3
2.2 Functions and Features·······················································································3
3. Installation······························································································4
3.1 Unpack checking ·······························································································4
3.2 Cabinet Outlook······························································································4
3.3 UPS module appearance·····················································································8
3.4 UPS module LCD control panel ·············································································8
3.5 Installation notes································································································9
3.6 External Protective Devices················································································10
3.7 Power Cables··································································································10
3.8 Power cable connect·························································································11
3.9Battery connection····························································································12
3.10 Online UPS Modules Replacement·····································································13
4. Operation ········································································································15
4.1 Operation Modes······························································································15
4.2 Turn on/off UPS·······························································································15
4.2.1 Restart procedure ··························································································15
4.2.2 Test procedure······························································································17
4.2.3 Black(Cold) start procedure··············································································17
4.2.4 Maintenance Bypass ······················································································17
4.2.5 Shut down procedure······················································································18
4.3 The Display ····································································································19
4.3.1 System LCD Display·······················································································19
4.3.2 UPS module LCD display·················································································26
4.3.3 Monitoring module control panel········································································28
4.4 Display Messages/Troubleshooting ······································································30
4.5 Options··········································································································33
Appendix 1 Specifications························································································35
Appendix 2 UPS message table·················································································36
Appendix 3 Problems and Solution············································································41
Appendix 4 RS232 communication port definition ······················································43

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1．Safety
Important safety instructions –Save these instructions
There exists dangerous voltage and high temperature inside the UPS. During the
installation, operation and maintenance, please abide the local safety instructions and relative
laws, otherwise it will result in personnel injury or equipment damage. Safety instructions in this
manual act as a supplementary for the local safety instructions. Our company will not assume the
liability that caused by disobeying of safety instructions。
1.1 Safety notes
1．Even no connection with utility power, 220/230/240VAC voltage may still exist at UPS outlet！
2．For the sake of human being safety, please well earth the UPS before starting it .
3．Don’t open or damage battery, for the liquid spilled from the battery is strongly poisonous
and do harmful to body！
4．Please avoid short circuit between anode and cathode of battery, otherwise, it will cause
spark or fire！
5．Don’t disassemble the UPS cover, or there may be an electric shock！
6．Check if there exists high voltage before touching the battery
7．Working environment and storage way will affect the lifetime and reliability of the UPS. Avoid
the UPS from working under following environment for long time
◆Area where the humidity and temperature is out of the specified range(temperature 0
to 40℃, relative humidity 5%-95%)
◆Direct sunlight or location nearby heat
◆VibrationArea with possibility to get the UPS crashed.
◆Area with erosive gas, flammable gas, excessive dust, etc
8．Keep ventilations in good conditions otherwise the components inside the UPS will be
over-heated which may affect the life of the UPS.
1.2 Symbols used in this guide
WARNING!
Risk of electric shock
CAUTION!
Read this information to avoid equipment damage

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2．Main Features
2.1 Summarization
Our UPS is a kind of three-in-single -out high frequency online UPS, it provides four
specifications: The 20KVA;30KVA;50KVA and 100KVA. The products are modularized and adopt
the N+X redundancy. It can flexibly increase the number of the UPS modules according to the
load capacity which is convenient for flexible allocation and gradually investment.
The UPS can solve most of the power supply problems, such as blackout, over-voltage,
under-voltage, voltage sudden drop, oscillating of decreasing extent, high voltage pulse, voltage
fluctuation, surge, inrush current, harmonic distortion (THD), noise interference, frequency
fluctuation, etc..
This UPS can be applied to different applications from computer device, automatic equipment,
communication system to industry equipment.
2.2 Functions and Features
◆Digital control
◆19-inch standard cabinet
1.4-meter and 2-meter high cabinets are provided according to the user’s requirement.
◆Modularized design
◆High power-density design
The height of the single module is 3U, a standard 1.4m cabinet can hold 5 pieces of modules
(we provide 4KVA/6KVA and 10KVA modules), so the whole capacity of each 1.4M cabinet can
reach 50KVA as maximum and vice versa, so the 2M cabinet for 10 modles can reach max.
100KVA.
◆N+X parallel redundancy
This series UPS adopts N+X parallel redundancy design, user can set different redundancy
according to the importance of the load. While the redundancy modules are set more than two,
the availability of UPS system will achieve 99.999%, which may satisfy the required reliability of
the critical load connected. Through LCD display setting, you may configure the required
quantity of the redundancy unit. When the load connected is over the number of the
redundancy, the UPS will alert right away. The design of the MTBF(Meantime before Failure) is
up to 250,000 hours.
This series can set the number of redundancy modules. When the load exceeds the
redundancy setting,The UPS can still work normally and simultaneously send out corresponding
warning as long as the load doesn’t exceed the total capacity of modules.
◆Parallel Redundant control system
◆Optimizing distributed convergence for the cabinet
◆Separated Bypass
◆Common Battery
◆Configuable Battery Voltage (16-20pcs)
◆Automatic charge current adjustment according to battery capacity connected.
◆3-Stage Intelligent charging
◆Touch-screen Super-large LCD display(Optional)
◆Each module with indiviaul LCD display
◆Remote Monitoring via SNMP
◆Optional Accessories available such as Isolation transformer, Distribution Panel, SNMP Card,

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Relay Contact Board, etc..
◆Equip with Maintenance Bypass Switch for easy maintenance purpose.
◆Superior MTTR(Meantime to repair) & Short shutdown time in maintenance
◆Centralized monitoring module is also available
◆EPO function
3．Installation
3.1 Unpack checking
1. Don’t lean the UPS when moving it out from the packaging
2. Check the appearance to see if the UPS is damaged or not during the transportation, do
not switch on the UPS if any damage found. Please contact the dealer right away.
3. Check the accessories according to the packing list and contact the dealer in case of
missing parts.
3.2 Cabinet Outlook
1. 1.4M 19” Rack Cabinet
Front View Side View Rear View
（1）front lock （2）LCD Display （3）Side Lock （4）Rear Lock

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Front View(internal) 50KVA Rear View 30/20KVA Rear View（Without
cover for terminal block）
50KVA Terminal Block of cabinet（without cover for terminal block）
（5）Main Switch of Central Monitor Unit （6）LED display of Central Monitor Unit （7）EPO
switch （8）O/P Switch（9）UPS Module 1 （10）UPS Module 2（11）UPS Module 3（12）UPS
Module4（13）UPS Module 5（14）Cover for terminal block（15）bottom cover for front door （16）
bottom cover for rear door （17）Main Switch for UPS Module 1 （18）Main Switch for UPS
Module 2 （19）Main Switch for UPS Module 3 （20）Main Switch for UPS Module 4 （21）
Main Switch for UPS Module 5 （22）Cover for terminal block （23）Inter-connecting port for
Modules （24）Dry Contact Port （25）LCD connecting port （26）RS485 port （27）RS485
port （28）RS232 port （29）OPTION port （30）Intelligent Network Port （31）SNMP port（32）
Maintenance Switch （33）distribution module port -1 （34）distribution module port -2 （35）
distribution module port -3 （36）PDU Output （37）PDU input （38）maintenance switch & its
cover（39）maintenance switch & its cover（40）30/20KVA terminal block for Input, output & battery
（41）30/20KVA-GND （42）50KVA-GND （43）50KVA terminal block for input, output & battery

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2. 2M 19” Rack Cabinet
Front View Side View Rear View
（1）front lock
（2）LCD Display
（3）Side Lock
（4）Rear Lock
1 2
2
3
2
2
2
4
2

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Front View(internal) 100KVA Rear View（Without cover for terminal block）
（5）Main Switch of Central Monitor Unit （6）LED display of Central Monitor Unit （7）EPO
switch （8）O/P Switch（9）UPS Module 1 （10）UPS Module 2（11）UPS Module 3（12）UPS
Module4（13）UPS Module 5 (14) UPS Module 6（15）UPS Module 7（16）UPS Module 8（17）
UPS Module 9 (18) UPS Module 10 （19）Maintenance Switch （20）maintenance switch & its
cover （21）bottom cover for front door （22）Main Switch for UPS Module 1 （23）Main Switch
for UPS Module 2（24）Main Switch for UPS Module 3（25）Main Switch for UPS Module 4（26）
Main Switch for UPS Module 5 （27）Main Switch for UPS Module 6 （28）Main Switch for UPS
Module 7 （29）Main Switch for UPS Module 8 （30）Main Switch for UPS Module 9 （31）Main
Switch for UPS Module 10 （32）RS485 port （33）RS485 port （34）Dry Contact Port （35）
LCD connecting port （36）RS232 port （37）OPTION port （38）Intelligent Network Port （39）
SNMP port （40）terminal block forInput, output & battery （41）distribution module port -1 (42)
distribution module port -2 (43) distribution module port -3 (44) distribution module port -4 (45)
distribution module port -5 (46) bottom cover for rear door (47) GND

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3.3 UPS module appearance
Front View
Rear View
Side View
（1）handle （2）screw holes （3）module connector slot （4）fan （5）UPS Module input
switch
3.4 UPS Module LCD control panel
LCD control panel introduction
（1）LCD Display Board （2）ESC （3）Off button （4）On button （5）right or down （6）
Enter（7）left or up （8）Output Indicator （9）Inverter Indicator （10）Battery Indicator （11）
Mains (AC) Indicator（12）Bypass Indicator （13）Fault Indicator

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3.5 Installation notes
Note: Consider for the convenience of operation and maintenance, the space in
front and back of the cabinet should be left at least 100cm and 80cm respectively when
installing the cabinet .
◆Please place the UPS in a clean, stable environment, avoid the vibration, dust, humidity,
flammable gas and liquid, corrosive. To avoid from high room temperature, a system of room
extractor fans is recommended to be installed. Optional air filters are available if the UPS operates
in a dusty environment.
◆The environment temperature around UPS should keep in a range of 0℃～40℃. If the
environment temperature exceeds 40℃, the rated load capacity should be reduced by 12％per
5℃. The max temperature can't be higher than 50℃.
◆If the UPS is dismantled under low temperature, it might be in a condensing condition.The
UPS can't be installed unless the internal and external of the equipment is fully dry. Otherwise,
there will be in danger of electric shock.
◆Batteries should be mounted in an environment where the temperature is within the required
specs. Temperature is a major factor in determining battery life and capacity. In a normal
installation, the battery temperature is maintained between 15°C and 25°C. Keep batteries away
from heat sources or main air ventilation area, etc.
WARNING!
Typical battery performance data are quoted for an operating temperature between
20°C and 25°C. Operating it above this range will reduce the battery life while
operation below this range will reduce the battery capacity.
◆Should the equipment not be installed immediately it must be stored in a room so as to
protect it against excessive humidity and or heat sources。
CAUTION!
An unused battery must be recharged every 6months Temporarily connecting the
UPS to a suitable AC supply mains and activating it for the time required for
recharging the batteries.
◆The highest altitude that UPS may work normally with full load is 1500 meters. The load
capacity should be reduced when this UPS is installed in place whose altitude is higher than 1500
meters, shown as the following table:
（Load coefficient equals max load in high altitude place divided by nominal power of the
UPS）
Altitude
（m）
1500
2000
2500
3000
3500
4000
4500
5000
Load
coefficient
100%
95%
90%
85%
80%
75%
70%
65%

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◆The UPS cooling is depending on fan, so it should be kept in good air ventilation
area. There are many ventilation holes on the front and rear, so they should not be
blocked by any exotic obstacles.
3.6 External Protective Devices
For safety reasons, it is necessary to install, external circuit breaker at the input A.C. supply
and the battery. This chapter provides guidelines for qualified installers that must have the
knowledge of local wiring practices for the equipment to be installed.
◆External Battery
The UPS and its associated batteries are protected against the effect of over-current
through a DC compatible thermo-magnetic circuit-breaker (or a set of fuses) located
close to the battery.
◆UPS Output
Any external distribution board used for load distribution shall be fitted with protective
devices that may avoid the risk of UPS overloaded.
◆Over-current
Protection device shall be installed at the distribution panel of the incoming main
supply. It may identify the power cables current capacity as well as the overload capacity
of the system .
CAUTION !
Select a thermo magnetic circuit-breaker with an IEC 60947-2 trip curve C
(normal) for 125% of the current as listed below.
3.7 Power Cables
◆The cable design shall comply with the voltages and currents provided in this
section, Kindly follow local wiring practices and take into consideration the environmental
conditions (temperature and physical support media) .
WARNING！
UPON STARTING, PLEASE ENSURE THAT YOU ARE AWARE OF THE
LOCATION AND OPERATION OF THE EXTERNAL ISOLATORS WHICH ARE
CONNECTED TO THE UPS INPUT/BYPASS SUPPLY OF THE MAINS
DISTRIBUTION PANEL.CHECK TO SEE IF THESE SUPPLIES ARE
ELECTRICALLY ISOLATED, AND POST ANY NECESSARY WARNING SIGNS
TO PREVENT ANY INADVERTENT OPERATION
◆For future expansion purpose, it is economical to install power cable according to
the full rating capacity initially. The diameter of cable is shown bellow：

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The 20KVA:
Item
Input three phases
Battery
Output Single
phase
Ground
Symbol
Vin-N
Vin-A
Vin-B
Vin-C
BAT+
BATN
BAT-
Vout-L
Vout-N
GND
Cable
diameter
30mm2
16mm2
The 30KVA:
Item
Input three phases
Battery
Output Single
phase
Ground
Symbol
Vin-N
Vin-A
Vin-B
Vin-C
BAT+
BATN
BAT-
Vout-L
Vout-N
GND
Cable
diameter
45mm2
25mm2
The 50KVA:
Item
Input three phases
Battery
Output Single
phase
Ground
Symbol
Vin-N
Vin-A
Vin-B
Vin-C
BAT+
BATN
BAT-
Vout-L
Vout-N
GND
Cable
diameter
75mm2
35mm2
The 100KVA:
Item
Input three phases
Battery
Output Single
phase
Ground
Symbol
Vin-N
Vin-A
Vin-B
Vin-C
BAT+
BATN
BAT-
Vout-L
Vout-N
GND
Cable
diameter
150mm2Or 2*75mm2
75mm2
Note: “2*” means two cables are connected in parallel
CAUTION!
Protective earth cable: Connect each cabinet to the main ground
system. For Grounding connection, follow the shortest route
possible。
WARNING!
FAILURE TO FOLLOW ADEQUATE EARTHING PROCEDURES
MAY RESULT IN ELECTROMAGNETIC INTERFERENCE OR IN
HAZARDS INVOLVING ELECTRIC SHOCK AND FIRE
3.8 Power cable connect
Once the equipment has been finally positioned and secured, connect the power

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cables as described in the following procedure.
Verify the UPS is totally isolated from its external power source and also all
power isolators of the UPS are open. Check to see if they are electrically isolated, and
post any necessary warning signs to prevent their inadvertent operation .
Open the UPS rear panel, remove the cover of terminals for wiring easily.
Choose appropriate power cable.（Refer to the table above）and pay attention
to the diameter of the connection terminal of the cable that should be greater than
or equal to that of the connection poles;
Connect cables according to indication as above, from left to right are three
phases input, battery and Single phase output(Input R, S, T, N are connected to the
3 phases of the input Line, BAT+, BATN and BAT- are connected to the external
battery box, output L, N are connected to the equipment(load) which is supplied by
the UPS);
WARNING!
If the load equipment is not ready to accept power on the arrival of
the commissioning engineer then ensure that the system output cables
are safely isolated at their ends
Connect the safety earth and any necessary bonding earth cables to the
copper earth screw located on the floor of the equipment below the power
connections. All cabinets in the UPS must be grounded properly.
CAUTION!
The earthing and neutral bonding arrangement must be in accordance
with local and national codes of practice.
3.9 Battery connection
The UPS adopts positive and negative double battery framework, total 16(optional
18/20) pieces in series. A neutral cable is retrieved from the joint between the cathode of
the 8th (9th/10th ) and the anode of the 9th (10th /11th) of the batteries. Then the neutral

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cable, the battery Positive and the battery negative are connected with the UPS
respectively. The battery sets between the Battery anode and the neutral are called
positive batteries and that between neutral and cathode are called negative ones. The
user can choose the capacity and the numbers of the batteries according to their desire.
The connection is shown as following:
Note：
The BAT+ of the UPS connect poles is connected to the anode of the positive battery, the
BAT- is connected to the cathode of the positive battery and the anode of the negative battery,
the BAT- is connected to the cathode of the negative battery。
Factory default setting for battery quantity is 16pcs and for battery capacity is 40AH (charger
current 6A). When connecting 18pcs or 20pcs batteries, please re-set desired battery quantity
and its capacity after UPS starts at AC mode. Charger current could be adjusted automatically
according to battery capacity selected. (Also charger current is selectable). Please refer to
“Chapter 4.3 LCD display”
CAUTION!
Ensure correct polaritybattery string seriesconnection. i.e. inter-tier and inter
block connections are from (+) to (-)terminals.
Don’t mix batteries with different capacity or different brands, or even mix up new
and old batteries, either.
WARNING!
Ensure correct polarity of string end connections to the Battery Circuit Breaker
and from the Battery Circuit Breaker to the UPS terminals i.e. (+) to (+) / (-) to
(-) but disconnect one or more battery cell links in each tier. Do not reconnect
these links and do not close the battery circuit breaker unless authorized by
the commissioning engineer.
3.10 Online UPS Modules Replacement
For the UPS, modules must be inserted to make a complete UPS system。
The replacement of UPS module is very simple and can be operated online.The
control system of the UPS can detect the inserted or removed module(s)
automatically. The user may operate easily by following the steps mentioned below.

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◆NOTE: The UPS module is rather heavy, please move it by two people!
◆Insert module
（1）Remove decorated panel;
（2）Put the UPS module in the cabinet module slot. Push the module along the slot into the
cabinet until the module is inserted properly.
（3）Fix the module with screws (M5*16) at the positioning screw holes;
（4）Open input switch at modules’ rear panel, and output switches accordingly. (From
bottom to top, the order is 1-5 or 10)
（5）After the modules start up , the system will detect the modules inserted automatically,
and parallel up the modules into whole system.
◆Remove UPS module
Remove the coronal screws on the left side of the module to stop the module
running completely and remove the module after fan stop spinning.
WARNING!
（1）Make sure the LCD screen is totally off before removing the module; otherwise, electric sparks
will occur at the connection of module and system cabinet.
（2）The coronal screw at left side of the module controls the operation of the module. Only after the
screw is tightened, the module can start running. When insert new module, make sure the screw is
tightened properly.
（3）When insert the module under battery mode, please press “ON” button at module’s LCD
panel until the module starts.

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4．Operation
4.1 Operation Modes
The UPS is a double-conversion on-line UPS that may operate in the following alternative
modes：
◆Normal mode
The rectifier/charger derives power from the AC Mains and supplies DC power to the
inverter while floating and boosting charge the battery simultaneously. Then, the inverter
converts the DC power to AC and supplies to the load.
◆Battery mode (Stored Energy Mode)
If the AC mains input power fails, the inverter, which obtains power from the battery,
supplies the critical AC load. There is no power interruption to the critical load. The UPS will
automatically return to Normal Mode when AC recovers.
◆Bypass mode
If the inverter is out of order, or if overload occurs, the static transfer switch will be activated
to transfer the load from the inverter supply to bypass supply without interruption to the critical
load. In the event that the inverter output is not synchronized with the bypass AC source, the
static switch will perform a transfer of the load from the inverter to the bypass with power
interruption to the critical AC load. This is to avoid paralleling of unsynchronized AC sources.
This interruption is programmable but typically set to be less than an electrical cycle e.g. less
than 15ms (50Hz) or less than 13.33ms (60Hz).
◆Maintenance mode (Manual Bypass)
A manual bypass switch is available to ensure continuity of supply to the critical load when
the UPS is out of order or in repair. This manual bypass switch is fitted for all UPS modules and
bears for equivalent rated load.
◆Redundancy mode
Based on different demands, The UPS can be set as N+X redundancy mode to increase the
reliability to the load connected.
4.2 Turn on/off UPS
4.2.1 Restart procedure
CAUTION!
MAKE SURE GROUNDING IS PROPERLY DONE!

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◆Set the Battery Breaker to the “ON”position according to the user’s manual.
◆Open the front and rear doors of the UPS to access to the main power switches.
During this procedure the output terminals will become alive.
CAUTION！
Check to see if the load is safely connected with the output of the UPS. If the
load is not ready to receive power from the UPS, make sure that it is safely
isolated from the UPS output terminals
◆Check the status of the power switch of the monitoring module. Defualt is set at “ON”.
Turn ON the power switch of the monitoring module, so that the UPS system can communicate
normally through the monitoring unit. When hot-swap this monitoring unit, the power switch must
be OFF.
◆Turn ON the input switches of all UPS modules, which locate at the modules’rear panels.
When AC MAINS input voltage within the range, the MAINS LED of the UPS modules will
light up accordingly. And the rectifiers of the UPS will be started up in 30 seconds, then the
inverter is started completely. When the output breaker is “ON”, the inverter LED lights up.
◆Switch ON all output breakers, which locate at module’s front panel.
If the rectifier of the module does not start-up, the bypass LED and Output LED
will light up. When the inverter is on, the UPS will transfer from bypass mode to
inverter mode, then the bypass LED is off and the inveter LED is on.
No matter the UPS is operated normally or not, the LCD display will indicate
current status. The top lines display the UPS operational status and the bottom
lines indicate alarm conditions when they occur.

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4.2.2 Test procedure
CAUTION!
The UPS is operating normally.
It may take 60 seconds to boost up the system and perform self-test completely.
◆Switch off the MAINS to simulate utility failure, the rectifier will turn off and the battery
should feed the inverter without interruption. At this time, the LEDs of battery, inverter and
output should be turned on.
◆Switch on the MAINS to simulate utility recovery, the rectifier will restart automatically
after 20 seconds and the inverter will supply to the load. It is suggested to use Dummy
loads for testing. The UPS can be loaded up to its maximum capacity during load test。
4.2.3 Black(Cold) start procedure
CAUTION!
Follow these procedures when the input AC Utility Failure, but battery is normal
◆Turn on the battery switch.
The battery will feed the Auxiliary power board.
◆Turn on the Output switch
◆Trigger the cold start buttons of the modules respectively as the position 4 of the above
drawing.
When battery normal, rectifier starts operation, 30s later, inverter starts and
operates, INV and output light up.
CAUTION!
Wait for approximately 30 seconds before you press the black start key
4.2.4 MAINTENANCE BYPASS
To supply the load via Mains, you may simply active the internal mechanical bypass switch.
CAUTION!
The load is not protected by the UPS when the internal mechanical bypass system is
active and the power is not conditioned.

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Switch to mechanical bypass
CAUTION!
If the UPS is running normally and can be controlled through the display, carry out
steps 1 to 5; otherwise, jump to Step 4.
◆Open the cover of maintenance switch, the UPS turns to bypass mode
automatically.
◆Turn on MAINTANCE breaker;
◆Open BATTERY breaker;
◆Switch OFF the MAINS breakers of all modules
◆Open all OUTPUT breakers;
At this time the bypass source will supply to the load through the MAINTENANCE
breaker.
Switch to normal operation (from mechanical bypass)
CAUTION!
Never attempt to switch the UPS back to normal operation until you have verified
that there are no internal UPS faults
◆Open the front and rear doors of the UPS to be easily access to the main
power switches
◆Switch ON the output breakers of the modules.
◆Switch ON the input breakers of the modules.
The UPS powers from the static bypass instead of the maintenance bypass,
then the bypass LED and output LED will light up.
◆Switch OFF the maintenance bypass breaker, then the output is supplied by the
bypass of the modules.
◆Put on the maintenance switch cover.
The rectifier will operate normally after 30 seconds. If the inverter works normally, the system
will be transferred from bypass mode to normal mode.
4.2.5 Shut down procedure
CAUTION!
This procedure should be followed to completely shut down the UPS and the
LOAD. After all power switches, isolators and circuit breakers are opened,
there will be no output.
◆Press the INVERTER OFF button on the right side of the operator control
panel for about two seconds；
◆The Inverter LED will be extinguished and audible alarm comes