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Descripción: power transformer
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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Note: −
−
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The approved updated updated nal settings should should be applied and printed out fro the relay by using the software of the relay. The approved nal setting and the printout nal nal setting should be attached with this test forat. The print out nal setting should should be signed by S!C "ND Contractor Contractor.. The following test forat forat contains iniu re#uired re#uired tests and and soe of settings are entioned as an e$aple and not as liitation.
D!SCR)%T)+N 1ua 1uan n (ac (achi hine ne )nte )nterf rfac ace e >1 >1()? ()? Che Chec9 c9ed ed.. Case !arthing chec9ed. *!D@s u unction Ch Chec9ed. Trip Contacts Chec9ed. Reset u unction Ch Chec9ed Aroup oup acti active ve uncti nctio ons Chec Chec9 9ed Binary inputs chec9ed. +utput Relays Chec9ed !ven vent Dis Disp play lay on on 1( 1() Scr Scree een n Ch Chec9 ec9ed Test swit switch ch ; plug plug chec chec9 9ed for for corr correct ect func functio tion. n. Eatch atchdo dog g cont contac acts ts chec chec9 9ed Cur Current ent shor shorti ting ng fac facil ilit ity y.
*iit: D.C. burden ---48 watts >Ref to the Technical anual FT/4< page no: <7
0ATC* DO' C*EC+:
Supply oG: Terinals >closed?: >closed? : Terinals erin als >open?: >ope n?: Supply on: Terinals >closed?: >closed? : Terinals erin als >open?: >ope n?: #&1&
T e s t e dby : Si gnat ur e& Dat e :
TIME ) DATE C*EC+:
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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To chec9 tie , date go to ain enu on the display for FT /4< then syste tie and adHust tie , Date. To test this6 reove the au$iliary supply fro the relay for appro$ <0 sec6 then restoring the au$ supply6 tie and date should be correct. R!SF*T: #&%&
%hase )nHected current (easured > " ? R B *iits: "plitude "ccuracy6 I 0.5 J ) r "ccording to the catalogue for Tech data -----------------------
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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#&%&#&IC+ ) DRO OFF TEST FOR DIFFERENTIA( CRRENT 4Id/: • • • •
This is single phase inHection test Disable S+T facility Disable any Negative se#uence facility Disable Kero se#uence reoving facility
The DiG !# for single phase inHection6 8 windings will be: 1& E)ND)NA: To obtain rated voltage &n calculate fro the tab changer data: &n &a$ Then &n
L 8 M>&a$. &in.? ; >&a$. O &in.?P L &in L L =& use this paraeter in relay setting for 1&
voltage. S
)
Rated> pry?
L
S
√ 3 V L
)
Rated> sec.?
L
√ 3 V ) Rated> pry?
CT R"T)+ L )diG operating value L >)Q set value? $ >9 fro table depending on vector group? $ >)rated of winding?
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;
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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fault type
Drawing ref.: Contract no.:
)d (in set value
Calculate d value >"?
(easured value >"? %ic9 up Drop out
Drop out pic9 up Ratio
R-N
-N
B-N
R-
-B
B-R
R--B
T e s t e dby : Si gnat ur e& Dat e :
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+perating Tie 8.5$ ) pic9 up >s?
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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*& E)ND)NA: fault type
)d (in set value
Calculate d value >"?
(easured value >"? %ic9 up Drop out
Drop out pic9 up Ratio
+perating Tie 8.5$ ) pic9 up >s?
R-N
-N
B-N
R-
-B
B-R
R--B
*iits: %ic9 up , Drop out I -------- J of )r for ) )r or I -----J of ) for ) Q )r6 Reset ratio Q ------ J Tiing tolerance: Typically 85 s for 8 )d , 48 s for 5 )d of unrestrained function6 "ccording to the catalogue for Technical Data ------------------
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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#&%&1&IC+ ) DRO OFF TEST FOR NRESTRAINED DIFFERENTIA( CRRENT
>)rest?: 1& E)ND)NA: %hase
set value
Calculate (easured d value value>"? >"? %ic9 Drop up out
Drop out pic9 up Ratio
+perating Tie 5$ ) pic9 up >s?
R
B
*& E)ND)NA: %has e
set value Calculate d value >"?
(easured value >"? %ic9 up Drop out
Drop out pic9 up Ratio
R
B
T e s t e dby : Si gnat ur e& Dat e :
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+perating Tie 5$ ) pic9 up >s?
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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#&%&%&BIAS C*ARACTERISTIC TESTIN':
)nHect 1.& , *.& %hase with e#ual current on each and angle 0 for 1.& and 40 for *.& then decrease *.& phase until trip6 while leave 1.& with $ed current which will be the bias current and record values and chec9 that corresponds to following e#uation Idi5 6 IN
Sec 8 Sec 4 )d (in IREST 6 IN
!ND S!CT)+N 4 !ND S!CT)+N 8
a.Section 4: Ehere bias current is between 0 )bias section 46 )din L 0.<6 set !nd section 4 L 4.85 Slope section 4
) bias > "?
) 1.& > "?
!$pecte d )*.& > "?
)d calculated
(easured )*.& >"? R B
)d in
T e s t e dby : Si gnat ur e& Dat e :
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!rrors J R
B
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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*iits: I-------- J )r according to the technical ref catalogue 9&Sope Section $:
Ehen bias current is between !nd sections 4 ) bias !nd section 8 Trip )diG L > )din O slope section 8 ;400 >) bias 3 !nd section 4?? " ) bias > "?
)
1.&
> "? !$pected )*.& > "?
)d calculated
(easured )*.& >"? R B
!rrors J R
B
*iits: I-------- J )r according to the technical ref catalogue c&Sope Section #:
Ehen bias current is ore than )bias U !nd section 8 Trip L > )din O slope section 8 ; 400 > !nd section 8 3 !nd section 4 ? O slope section < ; 400 > )bias 3 !nd section 8 ? " ) bias >"?
) 1.& >"?
!$pecte d )*.& > "?
)d calculated
(easured )*.& >"? R B
!rrors J R
*iits: I-------- J )r according to the technical ref catalogue
T e s t e dby : Si gnat ur e& Dat e :
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B
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
) Q %ic9up Eith out8nd haronic T e s t e dby : Si gnat ur e& Dat e :
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)B
Cross Bloc9 +n
) Q %ic9up Eith out8nd haronic
) Q %ic9up Eith out8nd haronic
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Cross Bloc9 +G
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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haronic
#&%&!&SOTF TEST:
This function used when energi2ed the transforer with internal fault where it use current gap principle to overridden all haronic and wavefor bloc9 and trip #uic9ly .To test it6 enable S+T function and inHect phase with haronic and current over pic9 up value VV at two conditions: a?
Direct inHection !$pected: - -------------------
statusW
--------------------b? 8 stage6 4 st state noral load without trip >note you ust inHect fro both side 1.& and *.& to stiulate the noral load ? and 8nd state with value over pic9 up and have a8nd haronic over 48 ; 44 setting !$pected: --------------------status: --------------------#&%&7&NE'ATI,E SE=ENCE TEST:
a?
)in negative se#uence test: )Ne#se# L 4;< >)R O a8 ) O a )B ? 6where a L ) --------)relay L )inHect = "nd we at test inHect single phase then )relay neg se# L 4 ; < )inHect 9
)in neg se# setting
)
1.&
> Q )(inNegSe# setting? >"?
!$pected )*.& >"?
(easured )*.& >"?
b? Negative se#uence Relay operating "ngle >Neg. se#. R+" ? test: T e s t e dby : Si gnat ur e& Dat e :
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)nHect 1.& , *.& Q )(inNegse# )nHect 1.& with angle Kero degree and change the *.& to get the operating Kone
Ne# se# R+" setting
!$pected )*.& angle for operation Kone >Deg?
(easured )*.& angle for operation Kone >Deg?
c/ SENSITI,E NE'ATI,E SE=ENCE 4TRN TO TRN FA(T/ TEST:
This function based on Negative se#uence discriinator6 where if there is no start signal >)ndependent on e$istence or not for start signal? and the fault is classied as internal fault and at sae tie for 1.& , *.& sides the negative se#uence current is greater than ) inNegse# then trip Transforer. To test it6 inHect single phase fro 8 winding in phase and increase the at sae tie until trip >ust happen by s;s neg only not restrain function?. Status: ------------------d/ NRESTRAINED NE'ATI,E SE=ENCE TEST:
"ny start signal activate that function >i.e6 function independent on start signal ? where if the fault discriinate as internal fault then reove any haronic which bloc9 relay and trip #uic9ly and if fault discriinate as e$ternal fault then if the signal is polluted with haronics this will bloc9 relay else re#uest trip. )nternal trip action >!$pected: Trip?:---------!$ternal trip >with haronics? action >!$pected: Bloc9?:-------!$ternal trip >without haronics? action >!$pected: Trip?:------ T e s t e dby : Si gnat ur e& Dat e :
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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CT characteristics Transforer current Rating E 4 >"? Transforer current Rating E 8 >"? Transforer current Rating E < >"? CT Rating E 4 >"? CT Rating E8 > "? CT Rating E< >"?
DiGerential characteristics )din !nd section 4 !nd section 8 Slope section 8 Slope section < Kero se# subtract paraeters calculation "plitude atch for E4 "plitude atch for E8 "plitude atch for E< (ultiplication factor or siple calculations6 enable or disable Kero se# for < winding together not individually AT ------------- R - %1"S! ) bias
) 1.&
!$pected *.&
) DiG calc
(easured ) *.&
(easured DiG
!rror J
(easured DiG
!rror J
AT ------------- - %1"S! ) bias
T e s t e dby : Si gnat ur e& Dat e :
) 1.&
EN'&
!$pecte d *.&
) DiG calc
(easured ) *.& Wi t ne s s e dby : Si g nat ur e& Dat e :
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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AT ------------- B - %1"S! ) bias
) 1.&
!$pecte d *.&
) DiG calc
(easured ) *.&
(easure d DiG
#&!&FINA( SETTIN'S:
%ower Transforer Conguration
Rated voltage E 4 Rated voltage E 8 Rated voltage E < Rated current E 4 Rated current E8 E 4 connection Type E 8 connection Type E < connection Type E 8 cloc9 nuber E < cloc9 nuber KS currsubtr E4 KS currsubtr E8 T e s t e dby : Si gnat ur e& Dat e :
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!rror J
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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KS currsubtr E< T conguration of E4 CT4 Rating E 4 CT8 Rating E4 T conguration of E8 CT4 Rating E 8 CT8 Rating E8
Calculated "plitude (atching actor >9?: = X L CTX ; Rated current of ref winding Ehere ref winding is rst winding with ------------connections6 if no -------- connection then 1& side selected autoatically6 = 1& L ---------------------------6 = *&L ----------------6 = Terit L---------------6 Aeneral DiGerential !#uation: T e s t e dby : Si gnat ur e& Dat e :
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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>) (? L =. >=?. >) n? Ehere6 >)? 3 atri$ of the atched currents )"6 )B6 )C6 9 3 Constant factor for agnitude atching6 >=? 3 coeYcient atri$6 dependent on the vector group6 >)n? 3 (atri$ of the phase currents )*46 )*86 )*<.
#&!&$& ic? 3p ) Drop o5 Test
The diG e#uation for single phase inHection6 8 windings will be "nd after applying 2ero se#uence reoving facility then6 = 1.& L --------- = *.&L ----1.&. Einding fault type
)d (in set value
Calculate d value >"?
(easured value >"? %ic9 up Drop out
Drop out pic9 up Ratio
+perating Tie 8.5$ ) pic9 up >s?
Drop out
+perating Tie
R-N -N B-N R- -B B-R R--B
*.&.Einding: fault
)d (in
T e s t e dby : Si gnat ur e& Dat e :
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Calculate
(easured value
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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type
Drawing ref.: Contract no.:
set value
d value >"?
>"? %ic9 up
Drop out
pic9 up Ratio
R-N -N B-N R- -B B-R R--B
T e s t e dby : Si gnat ur e& Dat e :
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Wi t ne s s e dby : Si g nat ur e& Dat e :
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8.5$ ) pic9 up >s?
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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#&!&#& ic? 3p ) Drop o5 Test
voltag e side
1.& side *.& side
%has e
)unrest set value
Calculate (easured value d value >"? >"? %ic9 Drop up oG
Drop out pic9 up Ratio
+perating Tie 8$ ) pic9 up >s?
R B R B #&!&1&
Bias C>aracteristic Testing:
Section 4: )diG L 0.85 ) rest Ehen bias current is between 0 )bias !nd section 4 Slope sectio n4
) bias > "?
) 1.& > "?
!$pecte d )*.& > "?
)d (easured )*.& >"? calculate R B d
!rrors J R
B
)d in
*iits: I-------- J )r according to the technical ref. catalogue Slope Section 8: Ehen bias current is between !nd sections 4 )bias !nd section 8 T e s t e dby : Si gnat ur e& Dat e :
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Wi t ne s s e dby : Si g nat ur e& Dat e :
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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#&!&""& Disturbance recorder chec9ed #&!&"$& Binary outputs and inputs
chec9ed CT characteristics Transforer current Rating E 4 >"? Transforer current Rating E 8 >"? Transforer current Rating E < >"? CT Rating E 4 >"? CT Rating E8 > "? CT Rating E< >"?
paraeters calculation "plitude atch for E4 "plitude atch for E8 "plitude atch for E< (ultiplication factor or siple calculations6 enable or disable Kero se# for < winding together not individually
T e s t e dby : Si gnat ur e& Dat e :
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
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AT ------------- R - %1"S! ) bias
) 1.&
!$pecte d *.&
) DiG calc
(easured ) *.&
(easure d DiG
!rror J
(easured ) *.&
(easure d DiG
!rror J
(easure d DiG
!rror J
AT ------------- - %1"S! ) bias
) 1.&
!$pecte d *.&
) DiG calc
AT ------------- B - %1"S! ) bias
) 1.&
!$pecte d *.&
) DiG calc
(easured ) *.&
A(-BABTAIN
T e s t e dby : Si gnat ur e& Dat e :
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Commissioning Service Department Commissioning Standard Test Formats Description: TRANSFORMER BIASED DIFF 7T!"#
