KStar YDC9300-B User manual

Uninterruptible Power Systems
10/15/20kVA
Operation Manual
4256-6956 C

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
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 Features............................................................................................................................................. 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 LCD control panel............................................................................................................................. 7
3.4 Installation notes .............................................................................................................................. 7
3.5 External Protective Devices ........................................................................................................... 8
3.6 Power Cables ..................................................................................................................................... 8
3.7 Power cable connect ........................................................................................................................ 9
3.8 Battery connection ......................................................................................................................... 10
3.9 UPS parallel Installation ................................................................................................................. 12
3.10 Computer access.......................................................................................................................... 13
4．Operation................................................................................................................................................... 15
4.1 Operation Modes ............................................................................................................................. 15
4.2 Turn on/off UPS ............................................................................................................................... 16
4.3 The LCD Display.............................................................................................................................. 22
4.4 Parameters setting ......................................................................................................................... 25
4.5 Parallel system commissioning.................................................................................................. 33
4.6 Display Messages/Troubleshooting........................................................................................... 34
4.7 Options .............................................................................................................................................. 35
Appendix 1 Specifications .......................................................................................................................... 37
Appendix 2 Problems and Solution.......................................................................................................... 38
Appendix 3 USB communication port definition .................................................................................. 39
Appendix 4 RS232 communication port definition............................................................................... 40
Appendix 5 RS485 communication port definition............................................................................... 41
Appendix 6 BAT_T communication port definition .............................................................................. 42
Appendix 7 Optional port definition ......................................................................................................... 42
Appendix 8 REPO instruction .................................................................................................................... 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 safety instructions.
1.1 Safety notes
1. Even no connection with utility power, 220/230/240Vac voltage may still exist at UPS
terminal!
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
◆Vibration Area 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
This series UPS is a kind of three-in-single-out high frequency online UPS.
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
This series UPS is controlled by Digital Signal Processor (DSP); enhance, it increases
reliability, performance, self-protection, and self-diagnostics and so on.
◆Battery Configurable
From 16 blocks to 20 blocks, the battery voltage of this series UPS can be configured at 16
blocks, 18 blocks or 20 blocks according to your convenience.
Optional: from 32 blocks to 40 blocks, the battery voltage of this series UPS can be configured
at 32 blocks, 34 blocks, 36 blocks, 38 blocks or 40 blocks according to your convenience.
◆Charging Current is configurable
Via setting tool, the user may set the capacity of the batteries as well as reasonable charging
current as well as maximum charging current. Constant voltage mode, constant current mode or
floating mode can be switched automatically and smoothly.
◆Intelligent Charging Method
The series UPS adopts advanced three-stage charging method—
1st stage: high current constant current charging
to guarantee to charge back to 90%;
2nd-stage: Constant Voltage
In order to vitalize battery and make sure batteries are fully charged
3rd stage: floating mode.
With this 3-stage charging method, it extends the life of the batteries and guarantees fast charging.
◆LCD Display
With LCD plus LED displays, the user may easily get UPS status and its operational
parameters, such as input/output voltage, frequency & load%, battery % and ambient
temperature, etc...
◆Intelligent Monitoring Function
Via optional SNMP Card, you may remotely control and monitor the UPS.
◆EPO Function
The series UPS may be completely shut off when the EPO is pressed. REPO function
(Remote EPO) is also available in this series UPS.

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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
3.2.1 10-20k (H)
FrontView SideView
10kVA Rear View(terminal block without cover) 15-20kVA Rear View(terminal block without cover)

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10-20kVA Rear View (Dual input, terminal block without cover)
(1) LCD panel (2) RS232 port
(3) Input Switch (4) USB port
(5) Dry contact port (6) External maintenance switch signal /
Maintenance switch cover plate
(7) Maintenance switch (8) Output Switch
(9) Terminal block for Input, output, battery &
Ground (Dual input) (10) Ground
(11) Parallel port 1 (12) Parallel port 2
(13) Intelligent Slot 2 (SNMP card/ Relay card) (14) Intelligent Slot 1 (SNMP card)
(15) RS485 port (16) REPO port
(17) Bypass Switch (Dual input)
3.2.2 10-20k (S)
FrontView SideView

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10kVA Rear View 15-20kVA Rear View
(terminal block without cover) (terminal block without cover)
10kVA Rear View 15-20kVA Rear View
(Dual input, terminal block without cover) (Dual input, terminal block without cover)
(1) LCD panel (2) RS232 port
(3) Input Switch (4) USB port
(5) Dry contact port (6) External maintenance switch signal /
Maintenance switch cover plate
(7) Maintenance switch (8) Output Switch
(9) Terminal block for Input, output, battery &
Ground (Dual input) (10) Ground

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(11) Parallel port 1 (12) Parallel port 2
(13) Intelligent Slot 1 (SNMP card) (14) Intelligent Slot 2 (SNMP card/ Relay card)
(15) RS485 port (16) REPO port
(17) Power Switch (18) Bypass Switch (Dual input)
3.3 LCD control panel
LCD control panel introduction
（1）LED（from top to bottom: “alarm”, “bypass”, “battery”, “inverter”） （2）LCD display（3）
scroll button （4）Off button （5）On button(battery cold start switch)
3.4 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.

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◆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%
◆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.
3.5 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.
3.6 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 and 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：
UPS
cabinet
Cable Dimension
AC Input
(mm2)
AC Output
(mm2)
DC Input
(mm2)
Grounding
(mm2)
10k
V
A 10 10 10 10
15k
V
A
16 16 16 16
20k
V
A
25 25 35 25

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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
3.7 Power cable connect
Once the equipment has been finally positioned and secured, connect the power 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.
Remove the cover of terminals for wiring easily.
Single input version:
Terminal sequence from left to right: Input phase A(L1), Input phase B(L2), Input phase
C(L3), Input Neutral line, Output phase L, Output Neutral line, Battery positive, Battery Neutral,
Battery negative. There are 3 connectors of GROUND under the terminal block.
Dual input version:
Terminal sequence from left to right: GROUND, Input phase A(L1), Bypass phase L, Input
phase B(L2), Input phase C(L3), Input Neutral line, Bypass Neutral line, Output phase L, Output
Neutral line, GROUND, Battery positive, Battery Neutral, Battery negative, GROUND.

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Warning！
In the case of “Dual input” operation, make sure the copper wire
between each input lines have been removed. The AC input and the AC
bypass supplies must be referenced to the same neutral point.
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;
Three phase in single phase out
Single phase in single phase out
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.
3.8 Battery connection
3.8.1 The standard model
The UPS adopts positive and negative double battery framework, totally 16pcs (optional 18/20)
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 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.

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External battery connections for long-run units.
Note：
The BAT+ of the UPS connect poles is connected to the anode of the positive
battery, the BAT-N 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 setting of the long-run unit is battery quantity---16pcs, battery
capacity---12V40AH (charger current 6A). When connecting 18/20 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. All
related settings can be done through LCD panel or monitoring software.
3.8.2 Optional model
The UPS adopts positive and negative double battery framework, totally 16pcs (optional 18/20)
in series. A neutral cable is retrieved from the joint between the cathode of the 16th (17th/18th/19th/20 th)
and the anode of the 17th (18th/19th/20th/21th) of the batteries. Then the neutral 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.
External battery connections for long-run units.

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Note：
The BAT+ of the UPS connect poles is connected to the anode of the positive
battery, the BAT-N 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 setting of the long-run unit is battery quantity---32pcs, battery
capacity---12V40AH (charger current 6A). When connecting 34/36/38/40 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. All related settings can be done through LCD panel or monitoring software.
CAUTION!
Ensure correct polarity battery string series connection. 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.
3.9 UPS parallel Installation
The following sections introduce the installation procedures specified to the parallel system.
3.9.1 Cabinet installation
Connect all the UPS needed to be put into parallel system as below picture.
Make sure each UPS input breaker is in “off” position and there is no any output from each
UPS connected. Battery groups can be connected separately or in parallel, which means the
system itself provides both separate battery and common battery.
WARNING!
Make sure the N, A (L1), B (L2), C (L3) lines are correct, and
grounding is well connected.

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3.9.2 Parallel cable installation
Shielded and double insulated control cables available must be interconnected in a ring
configuration between UPS units as shown below. The ring configuration ensures high reliability of
the control.
3.9.3 Requirement for the parallel system
A group of paralleled UPS behaves as one large UPS system but with the advantage of
presenting higher reliability. In order to assure that all UPS are equally utilized and comply with
relevant wiring rules, please follow the requirements below:
1) All UPS must be of the same rating and be connected to the same bypass source.
2) The outputs of all the UPS must be connected to a common output bus.
3) The length and specification of power cables including the bypass input cables and the UPS
output cables should be the same. This facilitates load sharing when operating in bypass
mode.
3.10 Computer access
◆One end of a USB cable connect to the computer, the other end connect to the USB port on
the UPS.
◆Open the software Muser4000, click “system” button.

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◆A window of “Software Parameter Setting” comes out as below, COM choose according to the
UPS , baud rate choose 9600, protocol choose “HIP”, then save this setting.
◆On the main page of Muser4000, click the button of “Append”, then goes to a window of
“Append equipment”.
◆Put the UPS name into “Equipment Name”, and UPS’ ID address into “Equipment address”.
◆Click the button “Append”, then the connection between UPS & computer is accomplished.
CAUTION!
When the UPS worked on inverter. If you want to use PC to set the
output voltage and frequency. Must shut down the inverter first

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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).

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◆ECO Mode
When the UPS is at AC Mode and the requirement to the load is not critical, the UPS can be set
at ECO mode in order to increase the efficiency of the power supplied. At ECO mode, the UPS
works at Line-interactive mode, so the UPS will transfer to bypass supply. When the AC is out of set
window, the UPS will transfer from bypass to Inverter and supplies power from the battery, and then
the LCD shows all related information on the screen.
◆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 and this manual bypass switch bears for equivalent rated load.
4.2 Turn on/off UPS
4.2.1 Restart procedure
CAUTION!
Make sure grounding is properly done!
◆ Set the Battery Breaker to the “ON” position according to the user’s manual.
◆ Turn ON the power switch for standard UPS.
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

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◆Turn ON Bypass breaker(Dual input version).
◆Turn ON Input breaker.
If the Rectifier input is within voltage range, the rectifier will start up in 30 seconds then
the inverter will start up after then.
◆Turn ON UPS output switch
If the rectifier fails at startup, the bypass LED will light up. When the inverter starts up,
the UPS will transfer from bypass mode to inverter mode, and then the bypass LED
extinguishes and the inverter LED lights up.
No matter whether the UPS can work normally or not, all the status will be shown on the
LCD display.
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 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 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.
Switch to mechanical bypass
If the UPS is running normally and can be controlled through the display, carry
out steps 1 to 6; otherwise, jump to Step 5.
◆Open the cover of maintenance switch, the UPS turns to bypass mode automatically.
◆Turn on MAINTANCE breaker;

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◆Switch OFF BATTERY breaker;
◆Switch OFF MAINS breaker;
◆Switch OFF BYPASS breaker(Dual input version);
◆Switch OFF OUTPUT breaker;
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
◆Turn ON OUTPUT breaker.
◆Turn ON BYPASS breaker(Dual input version).
◆Turn ON MAINS breaker.
The UPS powers from the static bypass instead of the maintenance bypass, then
the bypass LED will light up.
◆Switch OFF the maintenance bypass breaker, then the output is supplied by the
static bypass of the UPS.
◆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.
4.2.4 Cold start procedure
CAUTION!
Follow these procedures when the input AC Utility Failure, but
battery is normal
◆Set the Battery Breaker to the “ON” for long run UPS.
◆Turn ON the power switch for standard UPS.
◆Turn ON the Output switch.
◆Turn ON the power switch (power will feed to auxiliary power board).
◆Trigger the cold start button as the position 5 of the below drawing.