User Manual

Page 86
EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
[e-mail]
PSB 9000 2.5 kW Series
FollowingparameterscanbeconguredfortrackingmodeMPP2:
Value Range Description
U
OC
0...U
Nom
Voltage of the solar panel when unloaded, taken from the panel specs
I
SC
0...I
Nom
Short-circuit current, taken from the panel specs
Δt 5 ms...60000 ms IntervalformeasuringUandIduringtheprocessofndingtheMPP
ΔP 0 W...0.5 P
Nom
Tracking/regulation tolerance below the MPP
3.11.17.3 Mode MPP3
Also called “fast track”,thismodeisverysimilartomodeMPP2,butwithouttheinitialstepwhichisusedtond
theactualMPP,becausemodeMPP3woulddirectlyjumptothepowerpointdenedbyuserinput(U
MPP
, P
MPP
).
In case the MPP values of the equipment under test are known, this can save a lot of time in repetitive tests. The
rest of the function run is the same as with MPP2 mode. During and after the function, the least acquired MPP
values of voltage (U
MPP
), current (I
MPP
) and power (P
MPP
) are shown in the display.
FollowingparameterscanbeconguredfortrackingmodeMPP3:
Value Range Description
U
MPP
0...U
Nom
Voltage in the MPP
I
SC
0...I
Nom
Short-circuit current, taken from the panel specs
P
MPP
0...P
Nom
Power in the MPP
Δt 5 ms...60000 ms IntervalformeasuringUandIduringtheprocessofndingtheMPP
ΔP 0 W...0.5 P
Nom
Tracking/regulation tolerance below the MPP
3.11.17.4 Mode MPP4
Thismodeisdi󰀨erenttotheothers,becauseitdoesnottrackautomatically.Itrathero󰀨ersthechoicetodene
a user curve by setting up to 100 points of voltage values, then track this curve, measure current and power and
return the results in up to 100 sets of acquired data. The curve points can be entered manually or loaded from
USBstick.Startandendpointcanbeadjustedaswell,Δtdenesthetimebetweentwopointsandthefunctionrun
can be repeated up to 65535 times. Once the function stops at the end or due to manual interrupt, the DC input is
switchedo󰀨andthemeasureddataismadeavailable.Afterthefunction,theacquiredsetofdatawiththehighest
actual power will be shown in the display as voltage (U
MPP
), current (I
MPP
) and power (P
MPP
) of the MPP. Going back
on the screen with RETURN then allows for data export of the 100 measured results to USB stick.
FollowingparameterscanbeconguredfortrackingmodeMPP4:
Value Range Description
U
1
...U
100
0...U
Nom
Voltagefortheupto100userdenablecurvepoints
Start 1-100 Start point for the run of x out of 100 subsequent points
End 1-100 End point for the run of x out of 100 subsequent points
Δt 5...60000 ms Time before the next point
Rep. 0-65535 Number of repetitions for the run from Start to End
3.11.17.5 Load curve data from USB stick for mode MPP4
Alternatively to manual adjustment of the 1-100 available curve points, which can be quite time-consuming, the
curvepointdata(onlyonevoltagevalueperpoint)canbeloadedfromUSBstickinformofaCSVle.Seesection
1.9.6.5forthenamingconvention.Contrarytomanualadjustmentwhereyoucandeneanduseanarbitrarynum-
berofpoints,loadingfromUSBrequirestheCSVletoalwayscontainthefullnumberofpoints(100),because
itcan’tdenewhichoneisstartandend.However,theon-screensettingforStart and End point remain valid. It
means, if you actually want to use all 100 points from your loaded curve, you must set the parameters according.
Fileformatdenition:
• Thelemustbeatextlewithappendix*.csv
• Thelemustcontainonlyonecolumnofvoltagevalues(0...ratedvoltage)
• Thelemustexactly100valuesin100rows,nogaps
• Thedecimalseparatorofbrokenvaluesmustfollowthesetting“USBleseparatorformat”whereselection“US”
means dot as decimal separator and selection “Standard” means comma