Improper handling of the inverter can be dangerous
› You must read and understand the operating instructions before you can install and
use the inverter safely.
1.1.1 Other applicable documents
During installation, observe all assembly and installation instructions for components and other parts of the
system. These instructions are delivered together with the respective components and other parts of the system.
Some of the documents which are required to register your photovoltaic system and have it approved are
included with the operating instructions.
1.1.2 Retention of documents
These instructions and other documents must be stored near the system and be available whenever they are
needed.
The inverter converts the DC voltage generated by the photovoltaic (PV) modules into AC voltage and feeds this
into the power grid. The inverter is built according to the state of the art and recognized safety rules. Nevertheless, improper use may cause lethal hazards for the operator or third parties, or may result in damage to the
unit and other property. The inverter may be operated only with a permanent connection to the public power
grid.
1.4 Safety instructions
DANGER
Lethal voltages are still present in the terminals and lines of the inverter even after
the inverter has been switched off and disconnected!
Coming into contact with the lines and terminals in the inverter will cause serious
injury or death.
Only authorised electricians who are approved by the supply grid operator are allowed
to open, install and maintain the inverter.
› Keep all doors and covers closed when the unit is in operation.
› Do not touch the lines and terminals when switching the unit on and off!
The electrician is responsible for observing all existing standards and regulations.
• Above all, be sure to observe standard IEC 60364-7-712:2002, “Requirements for Special Installations or
Locations – Solar Photovoltaic (PV) Power Supply Systems”.
• Ensure operational safety by providing for proper earthing, conductor dimensioning and appropriate
protection against short circuiting.
• Observe the safety instructions located on the inner sides of the doors.
• Switch off all voltage sources and secure them against being inadvertently switched back on before per-
forming visual inspections and maintenance.
• When taking measurements while the inverter is live:
– Do not touch the electrical connections.
– Remove jewelry from your wrists and fi ngers.
– Make sure that the testing equipment is in good and safe operating condition.
• Stand on an insulated surface when working on the inverter.
• Generally, the inverter may not be modifi ed.
• Modifi cations to the surroundings of the inverter must comply with national and local standards.
If you need help solving a technical problem with one of our KACO products, please contact our service
hotline. Please have the following information ready so that we can help you quickly and efficiently:
• Inverter type / serial number
• Fault message shown on the display / Description of the fault / Did you notice anything unusual? / What has
You can find our warranty conditions on our website:
http://kaco-newenergy.de/de/site/service/garantie
From there, you can easily navigate to our international websites by clicking on the appropriate flag. Please
use our website to register your unit within 24 months:
http://kaco-newenergy.de/en/site/service/registrieren
You can also select the appropriate flag on this page to access the website for your own country.
In this manner, you can assist us in providing you with the quickest service possible. In return, you receive two
additional years of warranty coverage for your unit.
Note: The maximum length of the warranty is based on the currently applicable national warranty conditions.
We have prepared a template for complaints. It is located at
http://www.kaco-newenergy.de/en/site/service/kundendienst/index.xml.
The inverters leave our factory in proper electrical and mechanical condition. Special packaging ensures that
they are transported safely. The shipping company is responsible for any damage that occurs during transportation.
4.1.1 Scope of delivery
• XP500/550-OD-TL
• Documentation
Check your delivery
Inspect the inverter thoroughly.
Notify the shipping company immediately if you discover any damage to the packaging which indicates
that the inverter may have been damaged or if you discover any visible damage to the inverter.
Send the damage report to the shipping company right away. It must be received by them within six days
following receipt of the inverter. We will be glad to help you, if necessary.
4.2 Transportation
The inverter should be shipped using the original packaging to ensure that it is transported safely.
The inverter cabinets is delivered on a pallet.
The centre of gravity of the inverter is not in the middle of the XP500/550-OD-TL. Take this into
consideration when transporting the XP500/550-OD-TL.
The centre of gravity of the inverter is marked with the centre of gravity symbol on the packaging and the enclo-
When inverters are in storage, the following conditions are required. If not, this may cause failures. The company will not be responsible for the problems if following condition is not observed.
• The unit should be stored indoor in its original packaging when it’s being stored more than 6 months. If its
original packaging is removed, it should be stored indoor in a cool, dry place.
• When the unit is stored outdoor, please keep the remained original packaging and do not leave the unit out-
side for long term period.
• Storage temperature: -20°C ~ +70°C
• When inverter is stored under high humidity condition for long term period, it has to be dried out suffi ciently
more than 1 day before connecting to the power.
CAUTION
Inverter Storage Caution
Inverters need to be sotred at the correct temperature and correct humidity. If not,
this may cause failures.
5.2 Transporting the unit to the installation location
Once it has arrived at the installation location, the inverter may be transported using the designated eyebolts
or fork-lift. These are located on the top of the inverter housing.
CAUTION
Impact hazard, risk of breakage to the inverter
The centre of gravity is located in the upper part of the inverter.
› Transport the inverter in an upright position.
Transporting the inverter
Transporting the inverter using eyebolts
Transport the inverter in an upright position.
Connection the rope to the two eyebolts on the left.
Connection the rope to the two eyebolts on the right.
Attach both ropes to a hook, making sure that the ropes do not cross each other.
Lethal voltages are still present in the terminals and lines of the inverter even after
the inverter has been switched off and disconnected!
Coming into contact with the lines and terminals in the inverter will cause serious
injury or death.
Only authorised electricians who are approved by the supply grid operator may open,
install and maintain the inverter.
› Use extreme caution when working on the unit.
› Disconnect the AC and DC sides.
› Secure them against being inadvertently switched back on.
› Connect the inverter only after the aforementioned steps have been taken.
5.4.1 Protective earth connection
Connect the PE bus bars
The PE (protective earth) bus bars are located on the left and right sides of the inverter cabinets.
Connect the wires for “both” PE bus bars.
Earth the inverter
Determine the lay-out of the permanent wiring.
Secure the protective earths (tightening torque for PE terminals: 43Nm). Do not use plug connections.
Check whether all connected cables are securely attached and protected from mechanical forces.
5.4.2 Connecting to the external transformer (AC connection)
The inverter is connected to the power grid using a 3-phase connection. The connection for the power grid is
located in the left side of the housing, at the bottom.
Use the screws that are supplied to screw down the bus bars on both sides.
Connection data
Number of AC Cables (A,B,C)12
Max. Cable diameter for each phase240mm2 x 4
Tightening torque for AC terminal connections43Nm
Cable lug hole size12mm ~ 14mm
Connect the cables
Each cable corresponds to one phase.
Guide the cables through the opening. Be sure to connect each of the cables to the correct terminal.
Screw down the cables.
Check to make sure that all of the cables are securely attached.
Before starting the inverter, if components are condensed inside the inverter or have been stored in a highly
humid air for a long time, it has to be dried out enough for more than a day, otherwise it will cause failure. After
that the circuit breakers must be switched ON to start the inverter, which also switches on the control circuits.
DANGER
Lethal voltages are still present in the terminals and lines of the inverter even after
the inverter has been switched off and disconnected!
Coming into contact with the lines and terminals in the inverter will cause serious
injury or death.
Only authorised electricians who are approved by the supply grid operator may open,
install and maintain the inverter.
› Keep all doors and covers closed when the unit is in operation.
› Do not touch the lines and terminals when switching the unit on and off!
Switch on the circuit breakers or Fuse
StepCheckAction
1Fuse F30, 31, 34, 35, 36, 38, 39
Circuit breakers CB32, 40
2Circuit breakers MCB20, 21
Circuit breakers CB20
3Circuit breaker CB37 Switch on
4Key switchON Inverter ON
ON Proceed to Step 2
OFF Switch on,
Then proceed to Step 2
ON Proceed to Step 3
OFF Switch on,
Then proceed to Step 3
Then proceed to Step 4
OFF Inverter OFF
NOTE
For NG and PG type Inverter, please do not operate MCB20 arbitrarily.
It may cause failure of the unit.
When voltage is present at the inverter, it can be started up. Use the HMI interface to start up the inverter.
The inverter begins operation in a specifi ed sequence. For more information, see section 5.2 (“Transporting
the unit to the installation location”).
If a fault occurs, the inverter cannot begin operation. For more information on faults, see section 6 (“Faults
and Warnings”).
NOTE
If the fault cannot be reset using “Fault reset”, please contact our service department.
Since CB20 cannot be switched ON/OFF by Key switch, it must be operated manually.
CB20 is a MCCB which can be ON after charged and then OFF without further charging. (one cycle)
When operating, the process below showing how to turn on and off CB20 must be followed.
12
34
Figure 19: On/off operation of CB20
Key
1The default appearance of CB20, with black-on-white phrase “DISCHARGED SPRING”.
2After pulling out the handle, move it back and forth continuously until the CB20 gets charged.
3When charged, the black-on-white phrase “DISCHARGED SPRING” turns to be “CHARGED SPRING”
in black-on-yellow.
4Push “Push ON” button to switch ON CB20, then the state of CB20 will go back to the state of
‘Key 1’. To switch it OFF, press the “Push OFF” button.
Lethal voltages are still present in the terminals and lines of the inverter even after
the inverter has been switched off and disconnected!
Coming into contact with the lines and terminals in the inverter will cause serious
injury or death.
Only authorised electricians who are approved by the supply grid operator may open,
install and maintain the inverter.
› Keep all doors and covers closed when the unit is in operation.
› Do not touch the lines and terminals when switching the unit on and off!
5.6.1 Operating states
The Inverter has eight operating states. The explanations about each state are below.
Disconnected (default)Before operation has commenced the inverter is in the disconnected state. In
this state, the inverter is totally isolated from the PV array and the utility grid.
Connecting to the PV arrayWhen the inverter is in the “Disconnected” state, the ‘Key Switch On’ com-
mand is operated and the PV voltage is kept above 400V for 5 seconds, the
system turns on the PV Array side contactor (PV_MC).
Connecting to GridWhen the inverter is in the “Connecting to PV Array” state and the PV volt-
age is kept above the value of “MPPT V Start” parameter during the time set
by “MPPT T start” parameter, the contactor on the grid side is turned on. The
inverter keeps this state for 8 seconds.
Initializing MPPThe inverter calculates the MPPT start voltage which is product of measure-
ment of PV voltage and the parameter “MPP Factor”. After 5 seconds, the
inverter system enters into the “MPP start” state.
MPP startIn this state, the inverter controls the PV voltage. Reference of the PV voltage
is determined by MPPT start voltage which is calculated at “Initializing MPP”
state.
MPPTIf the PV voltage approximates the MPP start voltage (value of “MPPT V Start”
parameter), the MPPT will start. The inverter follows the MPP target value
automatically, which is varied by irradiance values. If the MPP target value is
out of the allowable MPPT range ([MPP start voltage – MPP Range lower] ~
[MPP start voltage + MPP range upper]), the system will return to the “Initializing MPP” state and will recalculate the MPPT start voltage.
System stopWhen the key switch is off, the PV Array side contactor and the Grid side
contactor are turned off and the system stops. If the output power of inverter
is kept below value of “MPPT P stop” parameter during time of “MPPT T
stop” parameter, connection to the grid is terminated.
Fault If a fault occurs during operation, the system stops. The system resets the
fault and tries to remove the fault. In the case that system removes a fault
successfully, system restarts all by itself. The system tries to remove the fault
at intervals of “MPPT Start” parameter since the last try until trial count
reaches to the number set in an “Auto Fault Reset Count” parameter. After
the number reaches to the “Auto Fault Reset Count” parameter, the system
will log an error and the system will not try to restart. In this case, XP500/550OD-TL inverter will try to remove the fault again using key Switch On command (after turning off by key Switch).
Table 4: Operating states
NOTE
If The System doesn’t try to remove the fault, please contact our service hotline.
MPPT P Stop (PV Array tab)7kW (above 550kVA capacity: 8kW)
MPPT T Stop (PV Array tab)60sec
Storage/Installation/Start-up
5.6.3 Run/Stop Condition
The XP500/550-OD-TL inverter supports On/Off function using Key Switch and CMT software.
The states about each condition are below sequence diagram.
Figure 21: Run & Stop Condition about Key Switch & CMT
The XP500/550-OD-TL inverter can be turned On & Off using only Key Switch, and can be turned off through
‘Off’ command of CMT. If the inverter is turned off by ‘Off’ command of CMT, the Fault Lamp is toggled.
Because the Key Switch is on state. And it is turned on by ‘On’ command of CMT or by Key Switch (after turning
off by key Switch).
HMI has Wi-Fi module that can operating AP mode. Smart Device can connect HMI AP.
5.9.1 IPhone CMT Application
After carry out App. Store, type “kaco” in the research tap. After you go into the set-up of Wi-Fi network,
choose ‘Model Name_Serial No.’
Figure 25: The Wi-Fi setup screen
After you execute CMT, touch the research button on the ‘Local Mode’ screen. Then choose the researched IP.
After that, click the application and it is diverted to the Status screen due to being accessed to the inverter.
The status screen shows the trouble of the inverter, Emergency and Stop information and the amount of the
electricity produced. It is the function list of CMT. If you touch the function that you want, it is diverted to the
pertinent function.
Figure 27: The Status screen / The Function screen
The statistic screen displays the statistic data saved in the inverter. If the inverter is broken down, trouble details
are printed out as a list.
Figure 28: The Statistics screen / Fault list screen
After carry out App. Store, type “kaco” in the research tap. After you go into the set-up of Wi-Fi network,
choose ‘Model Name_Serial No.’
Figure 29: The Wi-Fi setup screen
The status screen shows the status of the inverter, CO2 savings and sensors and the amount of the electricity
produced. It is the function list of CMT. If you touch the function that you want in the navigators of the screen
bottom, display screen is converted to face book / home / statistics / local conn / setup.
It prints out the statistical data per diem in detail. It is possible to move the date using the left and right scroll
on the graph. Or otherwise It is possible to selection of a date.
Figure 31: The Statistics screen
If the inverter is broken down, trouble details are printed out as a list. In case that there are a lot of trouble
details, you can check on the list using the up and down scroll.
It is the function to check on the balance of the electricity produced easily. If you input the standard price per
kWh on the text box located on the top, the balance is shown.
* Due to the fact that it is calculated based on the amount of the produced electricity that is computed in soft
ware, it is not complies with the actual balance.
* A unit price is input once and is saved until it will be changed.
When a problem occurs in the system, the Inverter will inform the user on the Fault Lamp. The Inverter displays
two basic error messages in the CMT (Support the PC and the Mobile version). The fi rst, the fault, is a serious
problem that causes the inverter to stop running. The second, a warning, is a minor problem that does not
cease the system operation. The CMT will indicate faults in red and warnings in yellow. The user can fi nd a
description of the different fault and warnings in the following Tables.
6.1 Warning
MessageCodeDescription
SP1(PV SP) Failure81Failure of the PV side surge protector(SP1)
CB10(PV Contactor) Failure 82PV side contactor(CB10) failure
PV Fuse Failure83PV side Fuse failure(option)
Ground Fault Warning84The insulation resistance of the PV falls short of the limit set in the
ground fault monitoring for Alert1(option)
PV Over Voltage85PV voltage exceeds the parameter [DC over voltage Level]
PEBB Over Temp. Warning100The temperature of the PEBB(Power Electronics Building Block) over
85°C(185°F)
PEBB Fan Failure101Failure of a PEBB(Power Electronics Building Block) fan
PEBB Temperature
Unbalance
SP2(Grid SP) Failure110Failure of the grid side surge protector(SP2)
ASYNC Warning111The phase synchronous of inverter and grid failure
Test Mode120The system is working in test mode
Watchdog121Abnormalities detection in the DSP
Invalid Parameter125Parameter is invalid value
Reconnection Condition
Warning
Cabinet Over Temp.
Warning
Cabinet Under Temp.
Warning
102The Difference of each PEBB temperature exceeds the operational
parameter [PEBB Temperature Unbalance Level]
126The grid voltage or frequency exceeds the reconnection condition
when reconnection to grid during operational parameter [Reconnection Condition Warning Delay] seconds
130The temperature of the cabinet over the parameter [Cabinet Tempera-
ture Maximum]
131The temperature of the cabinet falls below the parameter [Cabinet
Temperature Minimum]
SP3(Control Power SP)
Failure
CB32 Open133Failure of the top fan or power supply
SMPS Warning134Failure of the control SMPS(Switching Mode Power Supply)
CAN TX Failure135CAN bus communication transmission failure
CAN RX Failure136CAN bus communication reception failure
The Inverter can detect faults during operation. The inverter will display the fault in the CMT. Faults are indicated in the CMT with an error code, and a plain text message with the error code and system plant name in
the text line will be sent to the system operator (only available if purchased and confi gured during setup). This
section describes how to recognize the types of faults and how to correct these faults.
Warning
Code Message Warning description Possible problem and Solution(s)
81SP1(PV SP) Failure Failure of the PV side surge
protector(SP1)
83PV Fuse Failure PV side Fuse failure(option)Possible problem
100PEBB Over Temp.
Warning
The temperature of the
PEBB(Power Electronics Building
Block) over 85°C(185°F)
Possible problem
• Lightning strike on or near the PV system
wiring
Solution(s)
• Visual inspection
• Change the SPD
• PV system wiring short
• Short circuit in the IGBT
Solution(s)
• Check the input current
• Check module wiring
• Change the FUSE
Possible problem
• PEBB Fan Failure
Solution(s)
• Clean the fi lters or PEBB heat-sink fi ns
• Change the PEBB Fan
101PEBB Fan Failure Failure of a PEBB(Power Elec-
tronics Building Block) fan
110SP2(Grid SP) Failure Failure of the grid side surge
Lethal voltages are still present in the terminals and lines of the inverter even after
the inverter has been switched off and disconnected!
Coming into contact with the lines and terminals in the inverter will cause serious
injury or death.
Only authorized electricians who are approved by the supply grid operator may open,
install and maintain the inverter.
› Do not touch the lines and terminals when switching the unit on and off. Do not
touch exposed contact connections.
› Always shut down the inverter prior to cleaning or maintenance.
NOTE
Even between maintenance intervals, pay attention to any unusual behaviour that the inverter
displays during operation, and fi x the problem immediately.
Recommended
Maintenance-inter-
Maintenance work
vals
6 months*Cleaning or replacementFilter mats in the air intake fi lter
6 monthsCleaningInside of the cabinet
Fans
12 months*Function checkEmergency stop (OFF)
12 monthsCleaningPower section of the heat sink
12 monthsVisual inspectionContact connection
Fuses
Switches
Overvoltage protection
Redundant auxiliary power supplies
Check all parts in the cabinet for
– Heavy dust deposits and soiling
– Moisture (especially water that has
permeated from the outside)
Visual inspection
(and replacement, if necessary)
All warning labels
Function checkFans
Door contacts
Operating lights and fault lights
12 monthsTorque checkInput, output, Check the status of the screws
*If heavy soiling is present at the installation location, you may need to shorten the maintenance interval.
The inverter is equipped with thirteen fi lters. Filters at the top and bottom of the equipment, and is in the back
The fi lters must be cleaned on a regular basis to ensure maximum performance. If there are any problems with
the fans, repair or replace them.
7.2.1 Accessing the fans
Cleaning & Replacing the top side fi lters
Switching off the Inverter.
Remove the upper cover from the inverter.
Remove the fi lter cover.
Cleaning or Replacing the fi lter.
Assembly the fi lter cover.
Assembly the upper cover from the inverter.
Switching on the Inverter.
Cleaning & Replacing the rear side fi lters
Switching off the Inverter.
Remove the cover on rear side fi lter from the inverter.
Cleaning or Replacing the fi lter.
Assembly the fi lter cover.
Assembly the fi lter cover of rear side from the inverter.
Switching on the Inverter.
Cleaning & Replacing the bottom side fi lters in inverter
Switching off the Inverter.
Remove the fi lter on rear side.
Remove the fi lter cover on bottom side in inverter.
Cleaning or Replacing the fi lter.
Assembly the fi lter cover.
Assembly the fi lter cover of rear side from the inverter.
The inverter is equipped with ten fans. Six of the fans are installed in the left-top side of the housing to provide
ventilation for left side enclosure including PEBB (IGBT Stack). The other four fans in the right side of the housing is used to ventilate the right side enclosure. The fans must be cleaned on a regular basis to ensure maximum
performance. If there are any problems with the fans, repair or replace them.
The KACO XP-HV and XP-TL series parameters are pre-confi gured for operation. It is a good idea to adapt a
number of the KACO XP series parameters to the solar generator.
XP500/550-OD-TL parameters are subdivided into ten:
• PV Array
Setting values for MPPT control and startup of inverter
• Inverter
Setting values for inverter rate and cabinet temperature
• Grid
Setting values for abnormal and rated levels of grid
• Time
Setting values for the current time
• Digital
Setting values for digital interface
• Analog
Setting values for analog interface
• Controller
Setting values for inverter control
• Trace
Setting values for inverter fault analysis
• Offset
Setting values for sensing offset calibration
• Gain
Setting values for sensing gain calibration
8.1 PV Array Parameters
ParametersMinMaxUnitDescriptions
MPPT Enable01-1: MPPT is enabled
0: MPPT is disabled
MPPT V Maximum0830V
MPPT V Start200800V
MPPT T Start03600secTime delay for MPPT wake-up
MPPT P Stop010000WDisconnect inverter from Grid when PV output
MPPT T Stop0600secTime delay while inverter decides if PV output
power is lower than the setting value of {MPPT P
Stop}.
power is lower than the setting value of {MPPT P
Stop}.
Parameters
ParametersMinMaxUnitDescriptions
MPPT V Minimum200800V
dc
Minimum voltage to run MPPT
Exception)
DC Over Voltage
3001020V
dc
Upper limit for PV over voltage fault
Level
DC Over Current
0150%Upper limit for PV over current fault
Level
MPP Factor01-Maximum power point factor
MPP Range Upper10300V
MPP Range Lower10300V
PV Operation Level9001020V
dc
dc
dc
Upper limit of maximum power point
Lower limit of maximum power point
Maximum PV operation level
Table 12: PV Array Parameters
8.1.1 Operating DC voltage range
Figure 39: Operating DC voltage range
The range of possible operational input voltage is from [MPPT V Minimum] to [PV Operation Level]. The picture
above shows that the output power decreases linearly where the input power is from [MPPT V Maximum] to
[PV Operation Level].
PM: Instantaneously Available Power
∆P: Power Reduction (Power Reduction Gradient Level)
This function controls active power which is proportional to Grid frequency increase. As you can see in the picture, active power need to be restricted if grid frequency is over 50.2Hz. PM (Instantaneously available power)
decreases with 40%/Hz slope and it can be restorable if grid frequency is less than 50.05Hz.
8.3.4 Power Gradient Enable On
Figure 47: PV gradient graph
This function is for PV inverter re-generation. Inverter need to generate active power slowly with specifi c slope
when its operation stops due to various reasons. In this case, active power supply cannot be over 10% of rated
active power per minute.
COSPHI_1-11-The variable power factor reference according to
P10100%The active power setup conference for COSPHI_1
COSPHI_2-11-The variable power factor reference according to
P20100%The active power setup conference for COSPHI_2
COSPHI_3-11-The variable power factor reference according to
P30100%The active power setup conference for COSPHI_3
COSPHI_4-11-The variable power factor reference according to
P40100%The active power setup conference for COSPHI_4
0100VThe voltage level in order to separate Asynchro-
nous and synchronous. Inverter will recognize as
Asynchronous if the difference between inverter
sensing output voltage and RMS value of positive
value is less then this parameter level
099999secThe slope setup value for PF’s answering time in
Cos(P/Pn)
active power P_1
active power P_2
active power P_3
active power P_4
COSPHI_5-11-The variable power factor reference according to
active power P_5
P50100%The active power setup conference for COSPHI_5
COSPHI_6-11-The variable power factor reference according to
active power P_6
P60100%The active power setup conference for COSPHI_6
COSPHI_7-11-The variable power factor Reference according to
active power P_7
P70100%The active power setup conference for COSPHI_7
COSPHI_8-11-The variable power factor reference according to
active power P_8
P80100%The active power setup conference for COSPHI_8
COSPHI_9-11-The variable power factor reference according to
active power P_9
P90100%The active power setup conference for COSPHI_9
COSPHI_10-11-The variable power factor Reference according to
active power P_10
P100100%The active power setup conference for COSPHI_10
05000msecThe power generation is stopped for this param-
eter value after fault clear in FRT situation
8.7.1 Anti-Islanding Enable
With activation of Anti-Islanding function, XP-HV and XP-TL series will detect and disconnect itself from the
grid within a few second. If the Anti-Islanding function is not activated, XP-HV and XP-TL cannot disconnect
itself from the grid during grid failure, and generate power to load independently. For example, when inverter
infuse 500kW power to gird with 500kW load connected to PCC (Point of Common Coupling), inverter can
generate output voltage independently during grid failure, and operate itself with bearing 500kW load.
Power derating is enabled or disabled by an output of state machine which is decided by 4 inputs. And while
the output of state machine is 1, a decreasing rate affects an output power.
A decreasing rate is calculated by multiplying factor K({Power Derating P Gain}) and a difference between reference temperature({Power Derating Reference Temperature}) and PEBB heatsink temperature}.
An output of state machine depends on the state in which state machine is running. A transfer between states
happens when defi ned conditions are satisfi ed. Basically, if {Power Derating Enable} is 0, the state is “Disable”.
And If {Power Derating Enable} is 1, transfer is done according to PEBB heatsink temperature.
Following examples show power derating by default parameter.
Descriptions for sections of Example of Power Derating are:
T1: Inverter produces energy and PEBB temperature rises.
T2: When PEBB temperature is higher than 90°C, power derating is activated. And inverter controls output
power according to expression, P(%) =
100
-(
T
-80)x2 until power derating is deactivated.
PEBB
T3: Output power decrease and PEBB temperature drops. When PEBB temperature is lower than 70°C, power
derating is deactivated. And inverter doesn’t decrease output power.
8.7.4 Conceptual Relation between Output Power and Temperature
Below graph represents conceptual relation between inverter output power and heat sink temperature. The
output power is reduced in proportion to heat sink temperature but keep in mind that the power derating is
activated at 90°C and deactivated at 70°C (The activation/deactivation temperature can be tunable by parameter).
Figure 52: Relation between output power and temperature
8.7.5 COSPHI Control
COSPHI Control function is for controlling active and reactive power which is infused from XP inverter to the
grid with Prolog, HMI, and XCU at long distance.
COSPHI control operates with fi ve reactive and active power control ways according to {COSPHI Control Mode}
setting.
No. Power control DescriptionRelative Parameters
1Fixed PControl the maximum active power with {Remote
Power Control} parameter value(% of max rated
power).
2Fixed COSPHIControl the maximum active power with {Remote
Power Control} parameter value(% of max rated
power). Control power factor with parameter value of
{COSPHI Internal Power Factor} or {COSPHI RPC Power
Factor} according to present RPC status.
3Fixed QControl the maximum active power with {Remote
Power Control} parameter value(% of max rated
power). Control reactive power with parameter value
of {COSPHI Internal Reactive Power} or {COSPHI RPC
Reactive Power} according to the present RPC status.
4COSPHI(P/Pn)Control power factor to match the graph of maximum
10 continuous {COSPHI_n} and {P_n} pairs.
5Q(V)Control reactive power infusion from inverter to grid
when grid voltage is between rated range. The grid
voltage range where Q(V) function is possible is
determined by {Q(V) Control Deadband} and {Q(V)
Control K Factor}.
{Remote Power Control}
{Remote Power Control}
{COSPHI Internal Power
Factor}
{COSPHI RPC Power Factor}
{Remote Power Control}
{COSPHI Internal Reactive
Power}
{COSPHI RPC Reactive
Power}
{COSPHI_n}, {P_n}
(n = 1~10)
{COSPHI (P/Pn) {Ramp Time}
{Q(V) Control Deadband}
{Q(V) Control K Factor}
{Q(V) Control Ramp Time}
Table 20: COSPHI Control Mode
8.7.7 Communication between Components
COSPHI Control enables remote control of reactive and active power by setting reference of reactive and active
power by communication between Prolog, HMI, and XCU. Here are the communication methods between
each component.
1. User activates COSPHI Control by Prolog.
2. Prolog sends a COSPHI Control massage at two-minute intervals.
3. HMI interprets the COSPHI Control message from Prolog to modify parameters of XCU.
4. XCU operates according to the modifi ed parameter by HMI.
5. COSPHI (limited to Fixed COSPHI and Fixed Q) has two overlapping parameters for RPC and Internal modes,
and HMI modifi es the parameter for RPC mode only. If the relative RPC mode parameter is not modifi ed
longer than fi ve minutes, XCU will operate according to the parameter for internal mode.
COSPHI Control operates in RPC (Remote Power Control) and internal modes according to communication
status to control power with Fixed COSPHI and Fixed Q.
Figure 55: Transition of RPC mode and Internal Mode
1. RPC mode
While HMI is modifying XCU’s {Remote Power Control}, {COSPHI RPC Reactive Power} and {COSPHI RPC
Power Factor} parameters with two-minute interval, COSPHI Control operates in RPC mode. In RPC mode,
it operates according to {Remote Power Control}, {COSPHI RPC Reactive Power}, and {COSPHI RPC Power
Factor} modes.
2. Internal mode
If RPC mode parameter such as {Remote Power Control}, {COSPHI RPC Reactive Power}, and {COSPHI RPC
Power Factor} is not be modifi ed within fi ve minutes, XCU will operate in Internal mode. In Internal mode,
COSPHI control operates according to internal mode parameters such as {COSPHI Internal Reactive Power}
and {COSPHI Internal Power Factor}, {Remote Power Control} parameter does not infl uence on the active
power.
Output power limit is based on apparent power which is 111% of the rated power. In other words, where the
apparent power is over the rated power, active/reactive power is reduced at same rate respectively so that the
fi nal output power does not exceed 111% of the rted power.
PQ diagram above shows that the reactive power is from 0 to 242kVAR according to the power factor which is
from 1 to 0.9, the active power is up to 500kW and active/reactive power is not limited because the fi nal output
apparent power is not over 555kVA (111% of the rated power). And because the apparent power is over
555kVA where power factor is less than 0.9 the active/reactive power is reduced.
Figure 57: PQ Diagram of XP550-OD-TL
Output power limit is based on apparent power which is 101% of the rated power. In other words, where the
apparent power is over the rated power caused by reducing power factor, active/reactive power is reduced at
same rate respectively so that the fi nal output power does not exceed 101% of the rated power.
When changing the power factor from 1 to 0.9, the active power is down to 500kW and the reactive power
will be up from 0 to 242kVAR since the fi nal output apparent power should be remained at 555kVA (101% of
rated power). In case of power factor is 1.0, the output power is 550kW (550kVA).
8.7.9 The Relationship of Reactive Power and Active Power
While active and reactive power is set to exceed maximum complex power (1.11P
COSPHI Control reduces active power, and control reactive power by parameter setting.
) by parameter setting,
Rated
8.7.10 Cos (P/Pn)
The Cos (P/Pn) function allows inverter to send changeable PF (power factor) according to the active power to
grid. The maximum setup point of both PF and active power is 10 points and the maximum required value of
PF for Cos (P/Pn) is 0.9 in German market. XP-HV and XP-TL series can also operate with maximum PF, which
is 0.9, and its transient time is 10sec.
The above graphs show the change of electrical values during FRT (Fault Ride Through) control, and the detailed
description for each section is as follows.
Section 1
• If Grid Voltage drops below standard FRT value (0.9
) set by parameter, inverter will convert its mode to
P.U
FRT.
• The occurrence of Over Current is decided by the slope and depth, and if when over current occurs, inverter
will stop PWM Modulation for one cycle.
• Inverter will infuse the reactive power to grid according to parameter setting.
• Since the reactive power value is proportional to the parameter setting value, you can infuse reactive power
to grid as much as possible.
Section 2
• Infuse active power and reactive power to grid according to parameter setting.
Section 3
• The occurrence of Over Current is decided by the slope and depth, and if when over current occurs, inverter
will stop PWM Modulation for one cycle.
• Infuse active power and reactive power to grid according to parameter setting.
Section 4
• If Grid voltage rises above standard FRT value (0.9
) set by parameter, inverter will convert its mode to
The operation for FRT (Fault Ride Through) control is possible to set by parameter as follows.
• Grid Under Voltage Levels
- Grid Under Voltage Level 1 – Transfer to FRT mode.
- Grid Under Voltage Level2 – Inverter stops its operation with ‘Grid Under Voltage Level 2 Fault’ when the
grid voltage below ‘Grid Under Voltage Level 2’ sustains over “Grid Under Voltage Trip Time 2”.
- Grid Under Voltage Trip Time 1 – Permissible grid voltage under ‘Grid under Voltage Level 1’ time.
- Grid Under Voltage Trip Time 2 – Permissible grid voltage under ‘Grid Under Voltage Level 2’ time.
Figure 63: Grid Voltage Control during Q(V) Control Enable
As you can see in the above picture, this Q(V) Control function is for the reactive power infusion even if grid is
in normal range(90~110%). Dead band rage is U
Targ et
±1%.
Here, you can calculate slope K Factor for Q(U) Control using an equation Q/U=K Factor, and the variables
which are Q=cos(Phi)=0.95, Phi=18.2° and sin(Phi)=0.31. U is the voltage difference between the measured
voltage and the specifi ed parameter target voltage as a p.u. Therefore, you can decide slope k factor. For
example, if you want to infuse Q at U
±5% range and U
Targ et
Targ et=UN
, the K value would be calculated as
0.31/0.05=6.2. The rage of U is calculated from the end of the dead band.
The digital, analogue, RS485 and Ethernet connections are designed for SELV.
Only external SELV circuits are permitted to be connected to the SELV circuits
The system sends digital input signal in accordance with the setting of “DI1 Select” parameter in menu of HMI
or parameter setup tool (CMT, AutoSetup).
The {DI1 Check Period} is parameter in ‘8.5 Digital Parameters’ that mean recognition
pattern period for inverter stop operation when selecting ‘DI1 Select’ to ‘5’.
Table 29: Connections for analogue user input - PT 1000 ambient temperature sensor, wind speed sensor
9.3.4 Parameter settings for analogue sensors
IIn order to determine measured values using the analogue sensors, you have to set the “Options” parameter.
The options are calculated and set by a service technician from KACO new energy Inc.,.
ATTENTION
Be careful not to destroy the sensor's measuring input!
Avoid using voltages > 10V and make sure that the polarity is correct.