Keatec Energy RT 6KVA User manual

RT Series UPS 6-10kVA UL 208-220-230-240Vac
User Guide
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KE RT Series UPS 6-10kVA UL 208-220-230-240Vac User Guide English 20180130 This manual is for qualified personnel only
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Contents
1Safety Warnings ........................................................................................................................................ - 2 -
2Main Features ........................................................................................................................................... - 3 -
2.1 Introduction ........................................................................................................................................ - 3 -
2.2 Functions and Features ....................................................................................................................... - 3 -
3UPS Module Overview ............................................................................................................................. - 4 -
3.1 LCD control panel .............................................................................................................................. - 5 -
4Installation ............................................................................................................................................... - 16 -
4.1 Inspecting the UPS ........................................................................................................................... - 16 -
4.2 Unpacking the Cabinet ..................................................................................................................... - 16 -
4.3 Installation notes............................................................................................................................... - 16 -
4.4 External Protective Devices .............................................................................................................. - 17 -
Power Cables ................................................................................................................................................ - 18 -
4.5 Power cable connections .................................................................................................................. - 18 -
4.6 Battery connection ............................................................................................................................ - 19 -
4.7 UPS Parallel Installation ................................................................................................................... - 20 -
4.8 Cabinet installation ........................................................................................................................... - 20 -
4.9 Parallel cable installation.................................................................................................................. - 21 -
4.10 Requirement for the parallel system ................................................................................................ - 21 -
5Operation ................................................................................................................................................. - 22 -
5.1 Operation Modes .............................................................................................................................. - 22 -
5.2 Turn on/off UPS ............................................................................................................................... - 22 -
5.2.1 Connecting with Utility............................................................................................................ - 22 -
5.2.2 Black (Cold) start procedure .................................................................................................... - 23 -
5.2.3 Inverter Off .............................................................................................................................. - 23 -
5.2.4 Disconnecting with Utility ....................................................................................................... - 23 -
5.3 LCD Display instruction .................................................................................................................. - 24 -
5.4 Parameters setting............................................................................................................................. - 25 -
5.4.1 Mode setting............................................................................................................................. - 26 -
5.4.2 Output voltage setting .............................................................................................................. - 26 -
5.4.3 Output frequency setting .......................................................................................................... - 27 -
5.4.4 Battery capacity setting ............................................................................................................ - 27 -
5.4.5 Battery quantity setting ............................................................................................................ - 28 -
5.4.6 Bypass Volt-Hi setting ............................................................................................................. - 28 -
5.4.7 Bypass Volt-Lo setting ............................................................................................................. - 29 -
5.4.8 Buzzer Mute Setting ................................................................................................................ - 29 -
5.4.9 Battery Test Setting .................................................................................................................. - 30 -
5.4.10 Parallel ID setting .................................................................................................................... - 31 -
5.4.11 Parallel quantity setting............................................................................................................ - 31 -
5.4.12 Parallel redundancy quantity setting ........................................................................................ - 32 -
Appendix 1 Specifications............................................................................................................................... - 33 -
Appendix 2 Communication port definition ................................................................................................. - 35 -
Appendix 3 Option .......................................................................................................................................... - 35 -
Appendix 4 UPS message table ...................................................................................................................... - 36 -

KE RT Series UPS 6-10kVA UL 208-220-230-240Vac User Guide English 20180130 This manual is for qualified personnel only
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1Safety Warnings
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that you should follow during installation
and maintenance of the UPS and batteries. Please read all instructions before operating
the equipment and save this manual for future reference.
DANGER
THE UPS CONTAINS LETHAL VOLTAGES. ONLY AUTHORIZED SERVICE
PERSONNEL SHOULD PERFORM ALL REPAIRS AND SERVICE. THERE ARE
NO USER SERVICEABLE PARTS INSIDE THE UPS.
WARNING
•The UPS output may carry live voltage even when the UPS is not connected to an
AC supply.
•To reduce the risk of fire or electric shock, install the UPS in a temperature and
humidity controlled, indoor environment, free of conductive contaminants. Ambient
temperature must not exceed 40°C (104°F). Do not operate near water or excessive
humidity (95% maximum).
•To reduce the risk of fire, connect only to a circuit provided with branch circuit
overcurrent protection in accordance with the National Electrical Code (NEC),
ANSI/NFPA 70.
•Output overcurrent protection and disconnect switch must be provided by others.
•To comply with international standards and wiring regulations, the sum of the
leakage current of the UPS and the total equipment connected to the output of the
UPS must not have an earth leakage current greater than 3.5 milliamperes.
•If installing optional rackmount EBP(s), install the EBP(s) directly below the UPS
so that all wiring between the cabinets is installed behind the front covers and is
inaccessible to users. The maximum number of EBP(s) per UPS is four.
•If the UPS requires any type of transportation, verify that the UPS is unplugged and
turned off and then disconnect the UPS internal battery connector.
CAUTION
•Batteries can present a risk of electrical shock or burn from high short-circuit current.
Observe proper precautions. Only qualified service personnel with knowledge of
batteries and the required precautions should perform servicing. Keep unauthorized
personnel away from batteries.
•Proper disposal of batteries is required. Refer to your local codes for disposal
requirements.
•Never dispose of batteries in a fire. Batteries may explode when exposed to flame.

KE RT Series UPS 6-10kVA UL 208-220-230-240Vac User Guide English 20180130 This manual is for qualified personnel only
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2Main Features
2.1 Introduction
This series UPS is a single phase in and single phase out high frequency online UPS. The UPS is
modular and multiple modules can be installed to provide N+X redundancy.
This UPS protects your sensitive electronic equipment from most common power problems, including
power failures, power sags, power surges, brownouts, line noise, small voltage spikes, frequency
variations, switching transients, and harmonic distortion.
2.2 Functions and Features
1Phase In/1Phase Out UPS
It is 1Phase In/1Phase Out high-density UPS system, of which input current is kept in balance. No
unbalance problem might occur. And also support for single phase input.
Digital Control
This series UPS is controlled by Digital Signal Processor (DSP); which increases reliability,
performance, enables self-protection, and self-diagnostics.
Battery Configurable from 16pcs to 20pcs
The battery voltage of this series UPS can be configured at 16pcs, 18pcs or 20pcs according to your
convenience.
Intelligent Charging Method
The series UPS adopts advanced three-stage charging method. With this 3-stage charging method, it
extends the life of the batteries and is fast charging.
1st stage: high current constant current charging to 90%
2nd-stage: Constant Voltage to full charge
3rd stage: floating mode
LCD Display
With LCD plus LED display, the user may easily obtain UPS status and 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.

KE RT Series UPS 6-10kVA UL 208-220-230-240Vac User Guide English 20180130 This manual is for qualified personnel only
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3UPS Module Overview
Front View
Rear View
Side View
(1) handles (2) LCD Display (3) PDU (4) EPO (5) Parallel Port 1
(6) Intelligent slot （7）Battery Slot （8）Input breaker (9) COM（RS232） (10) USB
(11) Parallel Port 2 (12) AC terminals
() 1
() 2
() 1

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3.1 LCD control panel
LCD control panel introduction
(1) INVERTER LED
(2) BATTERY LED
(3) BYPASS LED
(4) ALARM LED
(5) LCD display
(6) UP button
(7) DOWN button
(8) ESC /OFF button
(9) ENTER/ON button
1 2 3 4
5
6 7 8

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4Installation
4.1 Inspecting the UPS
If any of the equipment received has been damaged during shipment, keep the shipping cartons and
packing materials in case a return is required and file a claim for shipping damage. If you discover
damage after acceptance, file a claim for concealed damage.
To file a claim for shipping damage or concealed damage: 1) File with the carrier within 15 days of
receipt of the equipment; 2) Send a copy of the damage claim within 15 days to your service
representative.
4.2 Unpacking the Cabinet
CAUTION
•Unpacking the cabinet in a low-temperature environment may cause condensation to
occur in and on the cabinet. Do not install the cabinet until the inside and outside of
the cabinet are absolutely dry (hazard of electric shock).
•The cabinet is heavy. Be careful unpacking and moving the cabinet.
To unpack the cabinet and accessories:
1. Open the outer carton and remove the accessories packaged with the cabinet.
2. Carefully lift the cabinet out of the outer carton.
3. Discard or recycle the packaging in a responsible manner.
Place the cabinet in a protected area that has adequate airflow and is free of humidity,
flammable gas, and corrosion.
4.3 Installation notes
Place the UPS in a clean, stable environment, avoid the vibration, dust, humidity, flammable gas and
liquid, corrosive objects. 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 the 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 must not 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.
Should the equipment not be installed immediately it must be stored so as to protect it against excessive
humidity and or heat sources.

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To monitor the UPS by the software, connect RS232 or USB cable between the computer and the UPS
respectively.
CAUTION
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.
CAUTION
An unused battery must be recharged every 3months. Temporarily connecting the
UPS to a suitable AC supply and activating it for the time required for recharging
the batteries.
The highest altitude that UPS may work normally with a full load is 1500 meters. The load capacity
should be reduced when this UPS is installed at an altitude higher than 1500 meters. Load coefficient
equals max load at altitude 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%
4.4 External Protective Devices
For safety, it is necessary to install an external circuit breaker at the input AC supply and another at the
battery. This chapter provides guidelines for authorized personnel and qualified installers - knowledge
of local wiring codes and laws is essential.
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
protect the UPS from becoming overloaded.
Over-Current
Protection devices shall be installed at the distribution panel of the incoming mains supply.
CAUTION
Select a thermo magnetic circuit-breaker with an IEC 60947-2 trip curve C
(normal) for 125% of the current as listed below.

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Power Cables
The cable design shall comply with the voltages and currents provided in this section. Follow local
wiring codes and laws taking into consideration the environmental conditions (temperature and
physical).
WARNING
Upon starting, 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. Post any
necessary warning signs to prevent any inadvertent operation.
For future expansion, it is recommended to install power cable according to the full rated capacity.
UPS
module
Cable Dimension
AC Input
(mm2)
AC Output
(mm2)
DC Input
(mm2)
Grounding
(mm2)
6KVA
6
6
6
6
10KVA
10
10
10
10
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.
4.5 Power cable connections
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.
Select the appropriate power cable (Refer to the table above).
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 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.

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Input connection “single phase + ground”
WARNING
If the load equipment is not ready to accept power during commissioning, ensure
that the system output cables are safely isolated at their ends.
CAUTION
The earthing and neutral bonding arrangement must be in accordance with local and
national codes of practice.
4.6 Battery connection
The UPS uses a positive and negative double battery framework, with 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 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 batteries. Users can
choose the capacity and the numbers of the batteries according to the set-up, however all must be the
same type and Ah rating. The connection is shown as following:

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Note
The BAT+ of the UPS connection 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 7AH (charger current
1A). When connecting 18pcs or 20pcs batteries, please re-set the battery quantity and its capacity after
UPS starts at AC mode. Charger current should 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 connections. I.e. inter-tier and inter block
connections are from (+) to (-) terminals. Do not mix new and old batteries, different
capacities or brands.
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 (-).
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.
4.7 UPS Parallel Installation
The following sections introduce the installation procedures specified to the parallel system.
4.8 Cabinet installation
Connect all the UPS needed to be put into parallel system as below.

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Ensure 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 certain the N and L lines are correctly connected, and ensure
grounding is secure. Install and secure grounding before all other
connections are made.
4.9 Parallel cable installation
Shielded and double insulated control cables available must be interconnected in a ring configuration
between UPS modules as shown below. The parallel control board is mounted on each UPS module.
The ring configuration ensure reliability of the control.
4.10 Requirement for the parallel system
For a group of paralleled modules behave as one large UPS system and in order to assure that all
modules are equally utilized and comply with relevant wiring rules, follow the requirements below:
1) All UPS must be of the same rating and be connected to the same bypass source.
2) The Bypass and Mains input sources must be referenced to the same neutral potential.
3) The outputs of all the UPS modules must be connected to a common output bus.
4) The length and specification of power cables including the bypass input cables and the UPS output
cables must be the same. This facilitates load sharing when operating in bypass mode.

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5Operation
5.1 Operation Modes
The UPS is a double-conversion on-line UPS that may operate in the following mode:
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. 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. If 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).
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 to increase the efficiency of the power supplied. In ECO mode, the UPS works in Line-interactive
mode, so the UPS will transfer to bypass supply. When the AC is out of the set window, the UPS will
transfer from bypass to Inverter and supplies power from the battery. The LCD shows all related
information on the screen.
Parallel redundancy mode (system expansion)
To achieve a higher capacity and / or increase reliability, the outputs of up to four UPS can be
programmed to operate in parallel. Each UPS has a built-in parallel controller and coordinates with the
other UPS using a control cable to manage load sharing automatically.
5.2 Turn on/off UPS
5.2.1 Connecting with Utility
Set the Battery Breaker to the “ON” position according to the user’s manual.
Switch on the UPS
CAUTION
Make certain grounding is correct and secure.
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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At startup, the internal fan of the UPS starts spinning, the UPS performs self-diagnostics until buzzer
beeps twice and the UPS is stable. The UPS then goes to bypass supply, the Utility LED and Bypass
LED are Green, and the inverter starts up. When the inverter is “normal”, the UPS goes to normal mode
and the load is supplied by the inverter.
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.
5.2.2 Black (Cold) start procedure
Follow these procedures when the input AC Utility Fails, but
battery is normal.
Turn on the battery switch - The battery will feed the Auxiliary
power board.
Press the black start buttons (position 9).
When the battery is normal the rectifier starts operation, 30s later
the inverter starts, INV and output light up.
CAUTION
Wait for approximately 30 seconds before you press the black start key
5.2.3 Inverter Off
When the Utility is normal, press “ESC /OFF” button for approx. 1 sec until beep sounds, the inverter
LED will extinguish, the bypass LED on, then the UPS turns to bypass supply.
When the UPS is on battery mode or without AC, press “ESC /OFF” button for approx. 1 sec until beep
sounds, the output of the UPS is off, fan stop spinning. After 60 seconds, all the LED on the LCD
display extinguish.
5.2.4 Disconnecting with Utility
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.
WARNING
Wait for about 5 minutes for the internal D.C. bus bar capacitors to be completely
discharged.
After the inverter is off, turn the Utility and battery breakers to “OFF”, then the LCD display
will extinguish completely and fan stops spinning in 60 seconds. If there are external battery
packs connected, please also turn the battery breaker to “OFF”.
1 2 3 4
5
6 7 8

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5.3 LCD Display instruction
The display provides more functions than those described in this manual. There are 10 interfaces
available in the LCD display:
ITEM
Interface Description
Content Displayed
01
Input
Voltage & Frequency
02
Output
Voltage & Frequency
03
Bat.﹢
Voltage & Current
04
Bat. -
Voltage & Current
05
Temperature
PFC/Internal temperature and ambient temperature
06
Load
Load
07
Bus voltage
Bus voltage ±
08
Software version
DSP version of inverter software
09
Model
Model
1. When the UPS is connecting with the Utility or Battery at cold start mode, it displays as below:
(1) Operational Status and mode
When the UPS is not in parallel model, Operational Status and mode are displayed as “NOA” or
“ECO”or“CF”.
If the UPS in parallel mode, it displays “PAL”.
To go to the next display pages (shown below) press the “down” button.
（2）Input voltage （3）Output voltage

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（4）Bat + voltage (Positive) （5）Bat – voltage (Negative)
（6）Load (7) PFC/ Ambient temperature up, only shows the
high temperature Internal temperature（down）
( 8 ) Bus voltage （9）Software version
5.4 Parameters setting
The setting function is controlled by four buttons (ENTER/ON, ESC/OFF, UP, DOWN):
ENTER ---goes into the setting page and value adjustment
UP & DOWN ---for choosing different pages
After the UPS turns ON, press buttons UP & DOWN for 3 seconds and to go to the setting interface
pages. After setting the parameter, press “ESC/OFF” button until display exits the current interface.

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5.4.1 Mode setting
Mode setting – Note: the area marked by the broken-line will be flashing.
•Use button ENTER /ON to choose different modes. There are 4 different modes for setting:
ECO, PAL, NOR, CF.
•Press UP & DOWN to exit the mode setting (save the mode setting), and move to output
voltage setting or parallel redundancy quantity setting.
5.4.2 Output voltage setting
Output voltage setting – Note: the area marked by the broken-line will be flashing.
Within the mode setting press DOWN or within the frequency setting press UP, to go to the output
voltage setting.
•Use button ENTER/ON to choose the different output voltage. There are 4 different voltages--
-208,220, 230, 240.
•Press ESC/OFF button to exit the output voltage setting (save the output voltage setting) and
goes to mode setting or frequency setting.
NOTE:When powered by inverter, it is necessary to turn off the inverter before setting voltage and
frequency level.

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5.4.3 Output frequency setting
Frequency setting – Note: the area marked by the broken-line will be flashing.
Within the output voltage setting press DOWN or within battery capacity setting press UP, to go to the
frequency setting.
•Use button ENTER/ON to choose the different frequency. There are 2 different frequency---
50/60Hz.
•Press ESC/OFF button to exit the frequency setting (save the frequency setting) and goes to
output voltage setting or battery capacity setting.
Note: When powered by inverter, it is necessary to turn off the inverter before setting voltage and
frequency level.
5.4.4 Battery capacity setting
Battery capacity setting – Note: the area marked by the broken-line will be flashing.
Within the frequency setting press DOWN or within the battery quantity setting press UP, to go to the
battery capacity setting.
•Use button ENTER/ON to choose the different battery capacity. Battery capacity range is 1-
200Ah. (Note: long-press of UP or DOWM can adjustment battery capacity quickly.)
•Press ESC/OFF button to exit the battery capacity setting (save the capacity setting) and goes
to frequency setting or battery quantity setting.

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5.4.5 Battery quantity setting
Battery quantity setting – Note: the area marked by the broken-line will be flashing.
Within the battery capacity setting press DOWN or within the bypass voltage upper limit setting press
UP, to go to the battery quantity setting.
•Use button ENTER/ON to choose the different battery quantity. Battery quantity range is
16、18, 20.
•Press ESC/OFF button to exit the battery quantity setting (save the battery quantity setting)
and goes to battery capacity setting or bypass voltage upper limit setting.
5.4.6 Bypass Volt-Hi setting
Bypass voltage upper limit setting – Note: the area marked by the broken-line will be flashing.
Within the battery quantity setting press DOWN, or within the bypass voltage lower setting press UP,
to go to the bypass upper limit setting.
•Use button ENTER/ON to set the different bypass voltage upper limit. The bypass voltage
upper limit range is 5%,10%,15%,25%(25% only for 220V output).
•Press ESC/OFF button to exit the bypass voltage upper limit setting (save the bypass voltage
upper limit setting) and goes to battery quantity setting or bypass voltage lower limit setting.

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5.4.7 Bypass Volt-Lo setting
Bypass voltage lower limit setting – Note: the area marked by the broken-line will be flashing.
Within the bypass voltage upper limit setting press DOWN or within the parallel ID setting press UP,
it goes to the bypass lower limit setting.
•Use button ENTER/ON (to set the different bypass voltage lower limit. The bypass voltage
lower limit range is 20%,30%,45%.
•Press ESC/OFF button to exit the bypass voltage lower limit setting (save the bypass voltage
lower limit setting) and goes to bypass upper limit setting or parallel ID setting.
5.4.8 Buzzer Mute Setting
Buzzers mute setting – Note: the area marked by the broken-line will be flashing.
Press DOWN under bypass voltage lower limit setting or press UP under the parallel ID setting to
ENTER the buzzer setting. Now the setting status is flashing as the Figure shows (note: on=mute; off=
no mute). When pressed, it shows the mute cycle setting, the selection includes ON and OFF. (Press the
up button or down button to exit the mute setting (save the mute setting status) and switch to bypass
voltage lower limit setting or parallel ID setting (note: when in stand-alone mode, press down button to
exit and save the settings, then the settings is completed for stand-alone unit).