PHASE FAULT OVER CURRENT RELAY SETTING (wrkng).xlsx

8/18/2019 PHASE FAULT OVER CURRENT RELAY SETTING (wrkng).xlsx

1/35

Relay operating time App

t(d) =

CB operating time =

ABB !5 "elay operating ti =

ABB !5 "elay error =

C& error =

Margin =

&otal escrinimation =

elected escrinimation =

*otes+

!) !%% msec descrinim

#) !%% msec descrimi

Curve Type k α rimary load current for plug set

/0C 1ery in1erse !'.5 ! = !!%2 of &ransform

/0C 0xtremely /n1erse $% # = !%52 of connected

/0C tandard in1erse %.!3 %.%# = $%2 of starting cur

/0C long time in1erse !#% ! = !#%2 of &ransform

= !!%2 of connected

RELAY SETTING CALCULATION (I!T Over"Current #rote$tion % &'

.*o. 4eeder description 4eeder type "elay type

6.6kV Switchgear at SS#1B

! 9!B /ncomer (! or '#) *on:&4" . ;8 ABB !#5% !

HSWG-034-D301(6.6kV SWITCHGE! T SS#0"3

Maximum Sym.3-phase faul (I"k): 26550 A

Minimum Sym.3-phase faul (I"k): 110 A

Maximum !#un$ faul%: 131& A

Minimum !#un$ faul%: 603 A

! *on:&4" . ;8 "0&#% !#5% !

# *on:&4" . ;8 "0&#% !#5% !

$%tg&i'g Tra')&r*er )ee+er )r&* 6.6kV witchgear (HSWG-034-D301

' utgoing to &4:%'3:#'*%!A>B &ransformer . ;8 "04!5 3%% !

3 utgoing to &4:%'3:#'*%#A>B &ransformer . ;8 "04!5 3%% !

5 utgoing to &4:%'3:#'*%'A>B &ransformer . ;8 "04!5 3%% !

-ere, ? @ are constants @ &> is &M (&ime multiplier setting)

8oltagele1el

8oltagegrade

C& rimarycurrent

C& econdarycurrent

Maxm

;D:%'3:'%!:/*%! (.?8/&C;D0A" /*CM0" %!)

;D:%'3:'%!:B&%! (.?8/&C;D0A" BE CE0" %!)


2/35


t(d) =

CB operating time =



C& error =

Margin =



*otes+








= !!%2 of connected




8oltagele1el

8oltagegrade

C& rimarycurrent

C& econdarycurrent

Maxm

,SWG-034-301(440V SWITCHGE! T SS#0"3



Maximum !#un$ faul%: '20 A


! &ransformer %.33 8 "04!5 '!5% !

# *on:&4" %.33 8 "04!5 '!5% !

' utgoing to MCC:%'3:*'%! *on:&4" %.33 8 "04!5 '% !

3 utgoing to MCC:%'3:*'%# *on:&4" %.33 8 "04!5 '% !

5 utgoing to B:%'3:*'%! *on:&4" %.33 8 "04!5 !#5% !

/ncomer of 33%8 8 s-itcgear (D:%'3:*'%!:/*%!>%#)

Bus coupler of 33%8 8 -itcgear(D:%'3:*'%!:)B&%!


3/35


t(d) =

CB operating time =



C& error =

Margin =



*otes+








= !!%2 of connected




8oltagele1el

8oltagegrade

C& rimarycurrent

C& econdarycurrent

Maxm

utgoing to B:%'3:*'%# *on:&4" %.33 8 "04!5 !#5% !

HE-34-01-C01/0"/03/04 (60V Thrit&r c&'t&r2 a'e2 T SS#0"4


Minimum Sym.3-phase faul (I"k): 2&360 A

Maximum !#un$ faul%: 3&30 A


! ;0:'3:%!:C%!>%#>%'>%3 *on:&4" %.< 8 "04!5 '!5% !


4/35

M = elected plug setting

condary

=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

6 8

%.7< %.7< %.$ %.!% %.


5/35


condary

=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

6 8

4ault current in relay coil (/f )

/f Actual fault

current

Calculatedlug setting

electedlug

setting

o-nstreamrelay

operating

time

iscriminationtime

esiredoperation

time

ase o1ercurrent

4aultcurrent in

relay coil ("eGected

fault current

%.

%.'# %.'# %.%% %.%5 %.%5 #%# 5%!!% 5%!!%.% 7


6/35


condary

=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

6 8


/f Actual fault

current


electedlug

setting

o-nstreamrelay

operating

time

iscriminationtime

esiredoperation

time

ase o1ercurrent

4aultcurrent in


fault current

%.7 %.77 %.%% %.%5 %.%5


7/35


8/35

"emar?sperating

time

%.3!

%.#!

%.%5

%.%5

%.%5


9/35

"emar?sperating

time

%.%5

%.!!


10/35


t(d) =

CB operating time =



C& error =

Margin =



*otes+








= !!%2 of connected



6.6kV Switchgear at SS#1B

! 9!B /ncomer (! or '#) *on:&4" . ;8 ABB !#5% !

HSWG-034-D301(6.6kV SWITCHGE! T SS#0"3



Maximum !#un$ faul%: 131& A


! *on:&4" . ;8 "0&#% !#5% !

# *on:&4" . ;8 "0&#% !#5% !

$%tg&i'g Tra')&r*er )ee+er )r&* 6.6kV witchgear (HSWG-034-D301

' utgoing to &4:%'3:#'*%!A>B &ransformer . ;8 "04!5 3%% !

3 utgoing to &4:%'3:#'*%#A>B &ransformer . ;8 "04!5 3%% !

5 utgoing to &4:%'3:#'*%'A>B &ransformer . ;8 "04!5 3%% !


8oltagele1el

8oltagegrade

C& rimarycurrent

C& econdarycurrent

Maxm

;D:%'3:'%!:/*%! (.?8/&C;D0A" /*CM0" %!)

;D:%'3:'%!:B&%! (.?8/&C;D0A" BE CE0" %!)


11/35


t(d) =

CB operating time =



C& error =

Margin =



*otes+








= !!%2 of connected




8oltagele1el

8oltagegrade

C& rimarycurrent

C& econdarycurrent

Maxm

,SWG-034-301(440V SWITCHGE! T SS#0"3



Maximum !#un$ faul%: '20 A


! &ransformer %.33 8 "04!5 '!5% !

# *on:&4" %.33 8 "04!5 '!5% !

' utgoing to MCC:%'3:*'%! *on:&4" %.33 8 "04!5 '% !

3 utgoing to MCC:%'3:*'%# *on:&4" %.33 8 "04!5 '% !

5 utgoing to B:%'3:*'%! *on:&4" %.33 8 "04!5 !#5% !

/ncomer of 33%8 8 s-itcgear (D:%'3:*'%!:/*%!>%#)

Bus coupler of 33%8 8 -itcgear(D:%'3:*'%!:)B&%!


12/35


t(d) =

CB operating time =



C& error =

Margin =



*otes+








= !!%2 of connected




8oltagele1el

8oltagegrade

C& rimarycurrent

C& econdarycurrent

Maxm

utgoing to B:%'3:*'%# *on:&4" %.33 8 "04!5 !#5% !

HE-34-01-C01/0"/03/04 (60V Thrit&r c&'t&r2 a'e2 T SS#0"4


Minimum Sym.3-phase faul (I"k): 2&360 A

Maximum !#un$ faul%: 3&30 A


! ;0:'3:%!:C%!>%#>%'>%3 *on:&4" %.< 8 "04!5 '!5% !


13/35


condary

=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

6 8

%.7< %.7< %.$ %.!% %.


14/35


condary

=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

6 8


/f Actual fault

current


electedlug

setting

o-nstreamrelay

operating

time

iscriminationtime

esiredoperation

time

ase o1ercurrent

4aultcurrent in


fault current

%.

%.'# %.'# %.%% %.%5 %.%5 #%# 5%!!% 5%!!%.% 7


15/35


condary

=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

6 8


/f Actual fault

current


electedlug

setting

o-nstreamrelay

operating

time

iscriminationtime

esiredoperation

time

ase o1ercurrent

4aultcurrent in


fault current

%.7 %.77 %.%% %.%5 %.%5


16/35

"emar?s

!.%'

%.$

%.<

%.5!

%.#$

%.#$

peratingtime


17/35

"emar?sperating

time

%.3!

%.#!

%.%5

%.%5

%.%5


18/35

"emar?sperating

time

%.%5

%.!!


19/35

Relay operating time Approximate discriminat

t(d) =

= %.# sec

Curve Type k α

/0C 1ery in1erse !'.5 !

/0C 0xtremely /n1erse $% # rimary load current for

/0C tandard in1erse %.!3 %.%# = !!%2 of &ransf

/0C long time in1erse !#% ! = !!%2 of conne

= $%2 of starting= !#%2 of &ransf



?8 A A ? ?8A

! 0xisting lant CB ; ;8 D0 % #%%% ! #%%%%

10-,-51-001 (66 kV GIS

! /ncomer to D/ *on:&4" ;8 Alstom 33# #5% ! #%%%%

# utgoing to !5%::$!:!%!A>B &ransformer ;8 Alstom 3# #5% ! #%%%%

10-,-51-00" (. kV Switch&ar+

! Bus coupler *on:&4" 5.7$ M8 epam &$! #5%% ! #%%%%

# /ncomer for !5%::$!:%%# &ransformer 5.7$ M8 epam &$! #5%% ! #%%%%

Tra')&r*er )ee+er

' utgoing to !5%::$#:!%!A>B &ransformer 5.5 M8 epam $% #5% ! % #%%%


8oltagele1el

8oltagegrade

C&rimarycurrent

C&econd

arycurrent

Max.?motor

Actualload 4

lam


20/35


t(d) =

= %.# sec

Curve Type k α








?8 A A ? ?8A


8oltagele1el

8oltagegrade

C&rimarycurrent

C&econd

arycurrent

Max.?motor

Actualload 4

lam

3 utgoing to !5%::$#:!%#A>B &ransformer 5.5 M8 epam $% #5% ! % #%%%

5 utgoing to !5%::$#:!%'A>B &ransformer 5.5 M8 epam $% #5% ! % #%%%

utgoing to !5%::$#:!%3A>B &ransformer 5.5 M8 epam $% #5% ! % #%%%

7 utgoing to !5%::$#:!%5A>B &ransformer 5.5 M8 epam $% #5% ! % #%%%

$ utgoing to !5%::$3:!%!A>B &ransformer 5.5 M8 epam $% '%% ! % #5%%

7&t&r 8ee+er

< M 5.5 M8 epam M$! 5% ! !$% %

!% M 5.5 M8 epam M$! !%% ! 'B>C

utgoing to 4las Dascompressor Motors !5%:HM:'3:!%!>#%!


21/35


t(d) =

= %.# sec

Curve Type k α








?8 A A ? ?8A


8oltagele1el

8oltagegrade

C&rimarycurrent

C&econd

arycurrent

Max.?motor

Actualload 4

lam

!! M 5.5 M8 epam M$! 5% ! '!5 %

!# M 5.5 M8 epam M$! !%% ! 35% %

!' M 5.5 M8 epam M$! 5% ! #3% %

utgoing to /nstrument Air

Compressor !5%:HM:%:!%!>#%!>'%!

utging to 0lectric 4ire aterump Motors !5%:M:75:%%!A>B

utging toater /nIectionump Motors !5%:M:5%:%%#A>B


22/35

M =elected plug setting

=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

M

6 8

sec sec sec A A A A

%.


23/35


24/35


=F

C& (sec)

C& (pri)

/0C cur1e type

Max. 4ault current

M

6 8

sec sec sec A A A A


/f Actual fault

current

o-nstreamrelay

operatingtime

iscrimination time

esiredoperation

time

ase o1ercurrent

4aultcurrent in

relay coil (/f )

α

"eGectedfault current

%.%% #.#% #.#% !7 #'!3$.% #'!3$.% 3#.


25/35

"emar?s

as D/ study &M=%.3

as D/ tudy &M=%.'!


26/35

"emar?s

& setting is cosen so tat te


27/35

"emar?s

tan te motor start up time at "C


28/35

Relay operating time

t(d) =

Approximate disc

=

Curve Type k α


/0C 0xtremely /n1erse $% #

/0C tandard in1erse %.!3 %.%#

/0C long time in1erse !#% ! rimary load curre

= !!%2 o= !!%2 o

= $%2 of

= !#%2 o

.*o. 4eeder description 4eeder type "elay type Actua

?8 A A ? ?8

1 10-,-5"-004 (Trai' 4 7CC

A) Bus coupler *on:&4" %.3# 8 "04 #% '#%% ! !'# #%

B) /ncomer &ransformer %.3# 8 "04 #% '#%% ! !'# #%

" 10-,-5"-00 (%ti2it 7CC

A) Bus coupler *on:&4" %.3# 8 "04 #% '#%% ! 35 #%

B) /ncomer &ransformer %.3# 8 "04 #% '#%% ! 35 #%

3 10-,-54-001 (E*erge'c 7CC

A) Bus coupler *on:&4" %.3# 8 "04 #% 3%%% ! #7 #5


8oltagele1el

8oltagegrade

C& rimarycurrent

C&econdary

current

Max.?motor


29/35

B) /ncomer &ransformer %.3# 8 "04 #% 3%%% ! #7 #5

C) 0D /ncomer *on:&4" %.3 8 " 3$< #5%% ! #7 !3


30/35


=F

C& (sec)

C& (pri)

er /ncomer)

utgoing)

I!T Over"Current #rote$tion % &'

Max. 4ault current

M

6 8

sec sec sec A A A A

%.$ %.%5 %.!% %.!5 #75# 55%


31/35

%.


32/35

Cal$ulation )or *etting t+e OC"&, prote$tion

(i '-./, !0A1 --.&234k0 Tran*)ormer

econdary 4A + !


33/35

0lectric Kre ater Motor

"ater o-er + 35% ?

4C+ 57.! A

"C + '35. A

ic? :up setting + # times te "C

-6'27/ A8-6& A


34/35

imary for a ' pase fault #3%5.


35/35

Documents

PHASE FAULT OVER CURRENT RELAY SETTING (wrkng).xlsx