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2 

PROT ECT ED 

Ll NE 

I 

ZS 

INT ERNAL 

I 

I 

FAULT 

I 

I 

EXT ERNAL 

I 

I 

I 

F AULT 

I 

l-

R ftcH

_J 

M 

N 

p 

M ARGIN 

S ET  M N  

) 

0.5 

NP 

8UT  OF  STEP 

B

L

O

C

K

I

N

G 

(WHEN 

USED

} 

PHASE 

TRIP 

85CO  ON· OFF  SWITCH 

SOl'"  78oA7-43 <00I 

COHTJ.CT 

OFF 

3·4 

11-12 

x- DENOTES  CONTACT  CLOI!D 

*F ig. 

2. 

Fig. 

1. 

Phase Relay  SeHings 

GROUND  TRIP 

CHANNEl CONTROL 

MOTES: 
I.  OPTIONAL  CONNECTION,  WHERE 

r. 

CO

NTACT  OF 

TD-4 

IS  AVAI LABLE  IN  BACKUP  CI RCUITS 

2.  OMIT  D0c  If  KRP  RELAY:  OMIT  D0p  If  KRC  RELAY: 

SUBSliTUTE  02  FOR  D0c 

& 

D0p  IF  KRQ  RELAY 

CSG 

AL 
CSG 
CSP 
Doc 

Dop 

ICS 

I, 

los 

MA 
OI 
OS 

RRG, RRP 

RRH 

RRT 

TXZ3 

zos 

ZP-H 
ZP-3f 

ZS-ff 
ZS-3. 

52 

a 

52TC 
85CO 

290Bl54 

ALARM  UNIT  OF  KA-4 

RELAY 

GROUND  AUXILIARY  UNIT  OF  U-4 

R E L AY 

�ASE  AUXI LIARY  UNIT  OF  KA-4 

RELAY 

CURRENT  POLAR I ZED  0 I RECTI OMAL  UN IT  OF  KRD-4 

RELAY 

VOLTAGE  POLARIZED  DIRECTIONAL  UNIT  OF  KR0-4 

RELAY 
INDICATING  CONTACTOR  SWITCH  Of  KD4 &KR0·4 

RELAYS 

GROUND  OVERCURREMT  TRIP  UNIT  OF 

.U0-4 RELAY 

GROUND  START  OVERCURRENT  UNIT  OF  KA-4 

RELAY 

Ml 

LLIANMETER 

OPERATION  INDICATOR  OF 

ICA-4RELAY 

AUXILIARY  UNIT  OF  KS  RELAY 

REC£1VER  RELAY  UNIT  CONTACTS  OF 

U-4 

R�LAY 

HOLDING  COIL  OF  RECEIVER  RELAY  UNIT  OF  U-4 

RELAY 
TRIPPING  COIL  OF  RECEIVER  RELAY  UNIT  OF  KA-4 

RELAY 

TINER  START  AUXILIARY  UNIT  OF  TD-4 RELAY 

DISTANCE  UNIT  OF  KS  RELAY 

PHASE-TO-PHASE  UN IT  OF 

10""4  R£LAY 

3  PHASE  UNIT  OF  K0-4 

RELAY 

PHASE-TO-PHASE  UNIT  OF  K0-41 RELAY 
3  PHASE  UNIT  OF  KD-41  RELAY 
C I RCUIT  BREAKER  AUXILIARY  SWITCH  CONTACT-

CLOSED  WHEN  BREAKER  IS  CLOSED 
CIRCUIT  BREAKER  TI I P   COIL 
CUTOUT  SWITCH-I M  'OM'  POSITIOII  WHEN 

CHANNEL  IS  OPERATI YE 

290Bl53 

Directional  Comp arison Bl ocking  - Trip 

& 

Control  Circuits. 

www 

. ElectricalPartManuals 

. com 

Содержание KD

Страница 1: ...his system can be utilized with minor differ ences with either on off or frequency shift type of operation over pilot wire tones microwave or power line carrier channels Blocking of tripping is ef fected by either keying on or shifting the transmitter frequency EQUIPMENT COMPLEMENT K Dar is the designation for a group of relays which are itemized below Directional Fault Detecting Relays 1 Type KD ...

Страница 2: ... UNIT OF KA RELAY CURRENT POLARIZEO OIRECTIOMAL UNIT OF XRO RELAY VOLTAGE POLARIZEO OIRECTIONAL UNIT OF XRO RELAY INOICATING CONTACTOR SWITCH OF XO XRO RELAYS GROUNO OVERCURRENT TRIP UNIT OF XRO RELAY GROUMO START OVERCURRENT UNIT OF KA RELAY MILLIAMMETER OPERATION INOICATOR OF KA RELAY AUXILIARY UNIT OF XS RELAY REC 1VER RELAY UNIT CONTACTS OF XA RELAY HOLDING COIL OF RECEIVER RELAY UNIT OF KA RE...

Страница 3: ...ws an optional time delay backup path through T3 contact which bypasses the RRP contact circuit T3 contact TX Z3 coil are from the TD 2 timing relay which is associ ated with an independent 2 zone distance backup circuit not shown Operation of ZP energizes TX Z3 coil which starts the timer If the fault either internai or external is not cleared by other means the breaker will be tripped after time...

Страница 4: ...duces a receiver output at A which energizes the RRH coil to prevent RRP and RRG contacts from closing thus tripping is pre vented Conversely for an ihternal fault tripping units operate at both stations to energize CSP or CSG contacts to prevent transmission of a blocking signal another set of CSP CSG contacts energize t he RRT coil Since neither station receives a blocking signal both RRH coils ...

Страница 5: ...OPEN OPEN GROUND Do CSG CSG ENERGIZES CLOSES CLOSES CSG Do CSG CSG ENERG I ZES CLOSES CLOSES CSG RRH COIL C3 R M RCVR FAUI T RRH ENERGIZED RRH DE ENERGIZED NOTE I FAULT RRH DE ENERGIZED RRH DE ENERGIZED FAULT RRH ENERGIZED RRH DENER GIZED FAULT RRH DE ENERGIZED RRH DE ENERGIZED TRIP CIRCUIT zp tOo I Iro R 2a c RRP RRG HELD OPEN BY RRH CURRENT RRP RRG HELD OPEN BY MAGNETIC BIAS NOHI TRIP THROUGH ZP...

Страница 6: ...swing describes an arc which intersects the Z circle at point Q and ZP 3 circle at point OS P During an out of step condition the Z0s contact in figure 2 opens before ZP 3 contact closes OS 6 unit is energized and after 4 cycles an OS con tact opens the ZP 3 trip circuit All this occurs before the swing reaches point P in Fig 3 During a fault the ZP 3 contact closes almost at the same instant that...

Страница 7: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 8: ...WESTINGHOUSE ELECTRIC CORPORATION RELAY DEPARTMENT NEWARK N J Printed in U S A w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 9: ...line carrier channels Blocking of tripping is ef fected by either keying on or shifting the transmitter frequency These instructions contemplate the use of separate primary and back up relays in line with local back up philosophies Fig 4 shows the details of this arrangement This contrasts to the previous 3 zone system where the zone 2 phase distance units provided carrier tripping as well as back...

Страница 10: ...ECTIONAL UNIT OF KRD RELAY ItS IRDICATIRG CONTACTOR SWITCH OF KO KRD RELAYS Io GROUND OVERCURREMT TRIP UIU T OF KRD RELAY los GROUND START OVERCURRENT UNIT OF KA RELAY MA M I LLIA14HETER 01 OPERATION INDICATOR OF KA RELAY OS AUXILIARY UNIT OF KS RELAY RRG RRP RECEIVER RELAY UNIT CONTACTS OF KA RELAY RRH HOLDING COIL OF RECEIVER RELAY URIT OF KA RELAY RRT TRIPPING COIL OF RECEIVER RELAY URIT OF KA ...

Страница 11: ...A fig 1 also operate for faults on the adja cent system therefore the ZP contacts must be supervised by a contact which does not close during external faults This supervising contact is RRP in fig 2 For internal faults the RRP contact closes to permit one of the ZP contacts to energize the breaker trip coil 52 TC The trip path is from positive through ICS coil ZP or ZP 3 OS contacts 85 CO contact ...

Страница 12: ...oil current holds the RRP and RRG contacts open RRT coil current closes the RRP and RRG contacts in the absence of RRH coil current Tliis is the key point which produces the comparison function the force pro duced by RRH current is stronger than the opposing force produced by RRT current so that the RRP and RRG contacts will be closed by RRT current only when no blocking signal is received In Fig ...

Страница 13: ...OSES NOTE 2 CSG los Do CSG CSG BKQ B OPENS ENERGIZES CLOSES CLOSES NOTE 2 CSG RRH COIL J R M RCVR FAULT RRH ENERGIZED RRH DE ENERGIZED HlOTE I FAULT RRH DE ENERGIZED RRH DE ENERGIZED FAULT RRH ENERGIZED RRH DENER Gl ZED FAULT RRH DE ENERGIZED RRH DE ENERGIZED TRIP CIRCUIT zp Do I Ira c 2a c RRP RRG HELD OPEN BY RRH CURRENT RRP RRG HELD OPEN BY MAGNETIC BIAS NOTEI TRIP THROUGH ZP RRP TRIP THROUGH Z...

Страница 14: ...00 2000 CCnHACT _3_ _4 S 6 7 8 hf c t r o X DENOTES CONTACT CI O EO I I I I I CJc I I SAME AS ZONE 1 ZONE 2 INTERNAL 5CHE IVIA TICS DEVICE NO DEVICE DWG t JO 43 RECL ON O F iOGoGLE SW DS41 f 9 85 CO C l R ON OFF S oo ITCH 85 P8 DEVICE No C A R TE T P SH BUTTON CAR D C SUPPL Y ON OFF TOUGLE SWITCH KR SLHT DEl UNIT 250VO TRESI TOR UNIT RELAY DS 41 GOO F 14 r C z c 1 C z oc Nc E t c i KD ZONE 2 KD PI...

Страница 15: ...15 1 0 t 1 85Z co TIME DISTANCE PLOT 21 Z 21 J rz o j 21 S o r _ _ _ _ _ _ 1 _ _ _ _ _ _ _ I P CARRIER POS DJ t c J L C L II BA CK UPRELAYING 7NT iO i01 Th 1M n 10 2 RT 1X L l l 1 1 2 Th TM lCS _ q 3 ill w II RECLOSINC CIRCUIT Pos t 1 0 IOI SC sl co 79 16 79X T 19 f bb 0 TO CLOSING CKT 7 OR 60LN 52X NEG r 19M l 79Z 791 T 14 s o 791 ill 5 15 Fig 4 Detailed schematic of the K Dar 4 zone directional ...

Страница 16: ...ult value ZLoad to the fault value represented by the line 0 F in Fig 3 When a swing or out of step condition occurs the imped ance seen by Z0s ZP changes gradually as the voltage decreases and the current increases In Fig 3 the swing describes an arc which intersects the Z0s circle at point Q and ZP 3 circle at point P During an out of step condition the Z0s contact in figure 2 opens before ZP 3 ...

Страница 17: ...power line carrier channels Blocking of tripping is ef fected by either keying on or shifting the transmitter frequency These instructions contemplate the use of separate primary and back up relays in line witli local back up philosophies Fig 4 shows the details of this arrangement This contrasts to the previous 3 zone system where the zone 2 phase distance units provided carrier tripping as well ...

Страница 18: ...C 85CO 290Bl54 ALARM UNIT OF KA 4 RELAY GROUND AUXILIARY UNIT OF U 4 RELA Y ASE AUXI LIARY UNIT OF KA 4 RELAY CURRENT POLARIZED 0IRECTI OMAL UN IT OF KRD 4 RELAY VOLTAGE POLARIZED DIRECTIONAL UNIT OF KR0 4 RELAY INDICATING CONTACTOR SWITCH Of KD4 KR0 4 RELAYS GROUND OVERCURREMT TRIP UNIT OF U0 4 RELAY GROUND START OVERCURRENT UNIT OF KA 4 RELAY Ml LLIANMETER OPERATION INDICATOR OF ICA 4RELAY AUXIL...

Страница 19: ... 1 also operate for faults on the adja cent system therefore the ZP contacts must be supervised by a contact which does not close during external faults This supervising contact is RRP in fig 2 For internal faults the RRP contact closes to permit one of the ZP contacts to energize the breaker trip coil 5 2 TC The trip path is from positive through ICS coil ZP or ZP 3 OS contacts 85 CO contact 1 2 ...

Страница 20: ...ontacts open RRT coil current closes the RRP and RRG contacts in the absence of RRH coil current Tliis is the key point which produces the comparison function the force pro duced by RRH current is stronger than the opposing force produced by RRT current so that the RRP and RRG contacts will be closed by RRT current only when no blocking signal is received In Fig 1 ZP or D0 I0 contacts close at bre...

Страница 21: ...TE 2 CSG Do los CSG CSG BKA B OPENS ENERG I ZES CLOSES CLOSES NOTE 21 CSG R R H C O I L c r R M RC I R FAULT RRH ENERGI ZED RRH DE ENERGIZED NOTE I FAULT RRH DE ENERG IZED RRH DE ENERGIZED FAULT RRH ENERGIZED RRH DENER Gl ZED FAULT RRH DE ENERGIZED RRH DE ENERGIZED T R IP C I RCUIT zp I Do I Iro R c 2o c RRP RRG HELD OPEN BY RRH CURRENT RRP RRG HELD OPEN BY MAGNETIC BIAS NOTEI TRIP THROUGH ZP RRP ...

Страница 22: ...DEVICE NO 21 1 2 s 6 T 67N 67NT t 67N1 61tH J L 7 84LH sox 5AME A S Z O N E I ZONE Z INTfRNAL I I S C EMATICS OEVte E C i QW OFF 10 5tr S CA ON OF SWITCH CAR TEST 1 If SI IET OFT UN r 250 v J 7 liE SISTO IJlQCIUNG DIODE ON I KO ii ON E 2 Kl PIL O T T R I P 0 4 N MG Ei B R FAIL IWX BKR FAIL AU KRD 4 K R P I R P SGR 12 A M T OX K0 3 CUR T DETE TOR DW5 NO S OifASJS t A s 1 8 4 A I s 62 A S I 1 29 A 7...

Страница 23: ...ONN CTION TO lli OCK ONE 2 TRIPPING O U R N G OUT OF ST P CONDITION IF i ONE 2 I S BLOCKED uSE t L7EitNATF CONNFC110N 6 M P gto ZPI VG TMROU5H T 3 CHJ IN5 1Tt t CL0S N6 CIRCUIT POS _ r 0 1101 SC t Z O V 60 C P S sl as 6 co iO IJ 52 6 1 T J l 8 0 CCO S N J C J4 T 7 J 71M Nf6 __ _ __ _ __ _ _ t t7 9 X 3 546701 5 Fig 4 Detailed schematic of the K Dar 4 zone direc tional c omparison blocking system 7 ...

Страница 24: ... sud denly from the prefault value Z Load to the fault value represented by the line 0 F in Fig 3 When a swing or out of step condition occurs the imped ance seen by Z 0s ZP changes gradually as the voltage decreases and the current increases In Fig 3 the swing describes an arc which intersects the Z 0s circle at point Q and ZP 3 circle at point P During an out of step condition the Z 0s contact i...

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