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W

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Wr

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Wri

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Writ

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Writi

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Writin

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Writing

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Writing

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Writing f

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Writing fo

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Writing for

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Writing form

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Writing formu

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Writing formul

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Writing formula

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Writing formula

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Writing formula f

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Writing formula fo

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Writing formula for

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Writing formula for

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Writing formula for “

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Writing formula for “X

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Writing formula for “XR

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Writing formula for “XRi

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Writing formula for “XRio

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Writing formula for “XRio

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Writing formula for “XRio C

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Writing formula for “XRio Co

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Writing formula for “XRio Con

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Writing formula for “XRio Conv

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Writing formula for “XRio Conve

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Writing formula for “XRio Conver

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Writing formula for “XRio Convert

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Writing formula for “XRio Converte

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Writing formula for “XRio Converter

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Writing formula for “XRio Converter”

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Writing formula for “XRio Converter”5

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Writing formula for “XRio Converter”5:

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In the previous video, the information regarding “Device” block and some parts of “Overcurrent” block such as “General”, “CT” and “VT” were completely covered.

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As mentioned before, under the “Elements” tab by double-clicking on “Overcurrent” block,

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“Normal Inverse” curve is selected for “51” function; the information related to this curve is located in “Overcurrent Elements” block.

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Now we are going to complete the “Overcurrent Elements” block information.

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E

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En

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Ena

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Enab

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Enabl

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Enabli

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Enablin

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Enabling

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Enabling

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Enabling a

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Enabling a

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Enabling a c

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Enabling a ch

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Enabling a cha

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Enabling a char

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Enabling a chara

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Enabling a charac

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Enabling a charact

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Enabling a characte

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Enabling a character

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Enabling a characteri

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Enabling a characteris

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Enabling a characterist

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Enabling a characteristi

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Enabling a characteristic

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Enabling a characteristic

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Enabling a characteristic c

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Enabling a characteristic cu

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Enabling a characteristic cur

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Enabling a characteristic curv

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Enabling a characteristic curve

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Enabling a characteristic curve:

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As you can see, activeness or inactiveness of the characteristic curves is determined in “Active” column.

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To link the value of this parameter which is located in the “Timed Overcurrent Element” block,

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by following the mentioned steps in previous videos, in “Add Ref.Param” window in “Device Config” block,

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“50/51” parameter with “Enumeration=Time Overcurrent IEC” and “ID=TXT_3_101” is selected

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and in “51” block, “IEC Curve” parameter with “Enumeration=Normal Inverse” with “ID=TXT_1_51” is selected

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and added to “References” section.

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Then, the formula is written as “OC_101=TXT_3_101 AND CURVE_51=TXT_1_51”.

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To validate the written formula, click on “Test” and finally click on “OK”.

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D

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De

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Det

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Dete

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Deter

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Determ

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Determi

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Determin

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Determini

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Determinin

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Determining

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Determining

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Determining t

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Determining th

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Determining the

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Determining the

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Determining the v

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Determining the va

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Determining the val

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Determining the valu

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Determining the value

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Determining the value

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Determining the value o

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Determining the value of

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Determining the value of

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Determining the value of l

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Determining the value of lp

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Determining the value of lpi

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Determining the value of lpic

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Determining the value of lpick

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Determining the value of lpicku

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Determining the value of lpickuu

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Determining the value of lpickuup

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Determining the value of lpickuup.

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Determining the value of lpickuup.n

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Determining the value of lpickuup.no

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Determining the value of lpickuup.nom

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Determining the value of lpickuup.nom:

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The parameters related to “lpickup” current and its tolerances are located in “Pick up Current” block.

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To link the current value of “Ipickup” whose value is a coefficient of “IREF”, double click on “State” column
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and by clicking on icon “…” in “Value Properties” section, click on “+” on-in “XRio Formula Editor” window

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and select parameter “Pickup 51” from “51” block and “Reference Current” parameter from “General” block on the “XRio” tree diagram to add them to “References” section.

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Then, using the “ID” of added parameters, the formula is written in the box at the right side as “PICKUP_51/IREF”.

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The formula is validated by clicking on “Test”.

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The value of “Ipickup.nom” parameter is calculated in accordance with that the value of “Pickup 51=1A” in “51” block and the value of “CT Secondary=1A” in “CT’S” block.
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D

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De

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Det

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Dete

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Deter

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Determ

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Determi

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Determin

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Determini

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Determinin

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Determining

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Determining

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Determining t

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Determining th

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Determining the

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Determining the

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Determining the c

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Determining the cu

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Determining the cur

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Determining the curr

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Determining the curre

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Determining the curren

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Determining the current

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Determining the current

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Determining the current t

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Determining the current to

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Determining the current tol

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Determining the current tole

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Determining the current toler

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Determining the current tolera

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Determining the current toleran

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Determining the current toleranc

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Determining the current tolerance

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Determining the current tolerances

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Determining the current tolerances:

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To link the value of “Tolerance Absolute Positive” parameter with “Current Tolerance Minimum” parameter,

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by following the mentioned steps from the “XRio” tree diagram, in the “General” and “Overcurrent” blocks from the “Rio” section, the “Current Tolerance Minimum” parameter

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is added to “References” section and the formula is written as “CURRENTTOLABS” in the box at the right side and then the formula is validated.

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Likewise, the values of “Tolerance Absolute Negative, “Tolerance Relative Positive” and “Tolerance Relative Negative” parameters

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are linked with parameters with “ID=CURRENTTOLABS”, “ID=CURRENTTOLREL” and “ID=CURRENTTOLREL” respectively.

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The “Tolerance Actual Positive” parameter selects the highest amount of positive tolerance from “Tolerance Absolute Positive”

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and “Tolerance Relative Positive” and based on a percentage of “IREF” puts it in its “Value” field.

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So, by following the previous steps and adding “Ref.Params”,

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the formula is written as “Max(TOLABSPOS,TOLRELPOS*NOMVAL/100)” and validated. 
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“Tolerance Actual Negative” parameter is almost the same as the previous parameter

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The only difference is that it calculates the highest amount of negative tolerance

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and its formula is written as “Max(TOLABSNEG,TOLRELNEG*NOMVAL/100)”.

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Also, for “Test Positive” parameter, the formula is written as “NOMVAL+TOLACTPOS+NOMVAL*TESTTOL/100”.

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This parameter shows the maximum total error of the test which may

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occur because of measurement error of current transformers, test device, noise, etc.

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in “Test Negative” parameter, the formula is written as “NOMVAL-TOLACTNEG-NOMVAL*TESTTOL/100”

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which shows the minimum total error of the test.

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D

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De

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Det

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Dete

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Deter

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Determ

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Determi

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Determin

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Determini

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Determinin

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Determining

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Determining

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Determining t

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Determining tr

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Determining tri

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Determining trip

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Determining trip

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Determining trip t

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Determining trip ti

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Determining trip tim

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Determining trip time

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Determining trip time

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Determining trip time a

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Determining trip time an

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Determining trip time and

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Determining trip time and

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Determining trip time and t

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Determining trip time and th

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Determining trip time and the

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Determining trip time and the

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Determining trip time and the r

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Determining trip time and the ra

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Determining trip time and the ran

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Determining trip time and the rang

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Determining trip time and the range

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Determining trip time and the range

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Determining trip time and the range o

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Determining trip time and the range of

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Determining trip time and the range of

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Determining trip time and the range of r

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Determining trip time and the range of re

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Determining trip time and the range of rel

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Determining trip time and the range of rela

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Determining trip time and the range of relay

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Determining trip time and the range of relay

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Determining trip time and the range of relay p

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Determining trip time and the range of relay pe

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Determining trip time and the range of relay per

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Determining trip time and the range of relay perf

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Determining trip time and the range of relay perfo

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Determining trip time and the range of relay perfor

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Determining trip time and the range of relay perform

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Determining trip time and the range of relay performa

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Determining trip time and the range of relay performan

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Determining trip time and the range of relay performanc

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Determining trip time and the range of relay performance

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Determining trip time and the range of relay performance:

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After determining current tolerances, the information related to “Time Multiplier/Trip Time” block should be completed.

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In this block, by following the mentioned steps, the value of “Nom.Time Multiplier” parameter

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should be linked with “Time Dial 51” parameter which is located in “51” block.

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According to “IEC” standard, the “Ipickup” current value of relays can range from “1.1” times

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to “1.3” times of the nominal current. Based on the manual of this relay, “1.1” is selected

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for this relay which means that the relay must not “Pickup” less than the determined current.

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This parameter is located in “Min Operate Current” block with the name of “Nom.Min.Op.Curr

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and its value should be linked with “1.1” times of the nominal current.

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So, the formula is written as “1.1*NOMVAL”.

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According to “IEC” standard, if the injected current is bigger than “20” times of the nominal current, the relay should give a trip at a “Definite” time.

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This parameter is located in “Max Operate Current” block with the name of “Nom.Max.Op.Curr”

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but in this video, we skipped entering the information of this parameter.

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It should be noted that the activeness of “Range Limits” value should be linked with another parameter in “Device Config” block.

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This parameter is located in “Timed Overcurrent Element” block with the name of “Use Range Limits”.

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By repeating the mentioned steps for linking and selecting the “50/51” parameter

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and “Enumeration=Time Overcurrent IEC” with “ID=TXT_3_101”, the formula is written as “OC_101=TXT_3_101” and after testing

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the “OK” option is selected.

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You can find this parameter in “Elements” tab of “Overcurrent” block.

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If this option is enabled, the relay must not “Pickup” in current values less than “lmin”.

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F

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Fi

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Fin

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Fina

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Final

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Final

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Final r

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Final re

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Final rev

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Final revi

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Final revie

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Final review

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Final review:

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The information regarding the curve is mentioned in the tree diagram of “Operating Curves” and “Standard Curve” blocks.

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You can view the changes made by double-clicking on “Overcurrent” block.

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Under the “Relay Parameters” tab, the tolerance values are derived from the determined formula

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and its cell color is turned purple.

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Also, under the “Elements” tab, the parameters for which a formula is determined are turned purple.

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Then, click on “Ok” so save the settings.

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You can see that the “Normal Inverse” curve is displayed on “Overcurrent Characteristic” window.

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To further examine the validity of written “XRio” file, some cases are tested as a sample.

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To do this, “Disabled” is selected in “Device Config” block

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and then by double-clicking on “Overcurrent” block, you can see that the curve has been disabled.

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Also, by clicking on “Ok”, no curve is displayed on “Overcurrent Characteristic” window.

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As another example, the value of “Time Overcurrent IEC” is selected in “Device Config” block

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and in “51” block, “Pickuup 51=4A" is determined as the current value while “Time Dial 51=0.5” is determined as time.

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In the “Overcurrent” block it is observed that the same changes are made. For example, the minimum current value is “Ipickup=4.4A”.
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After clicking on “OK”, the changes are made to “Overcurrent Characteristic” window.