AN

NU

NC

IATI

ON

TO

SC

AD

A

INIT

IATE

A/R

BLO

CK

A/R

INIT

IATE

LB

B

MA

IN C

B T

C-1

R,Y

,B-P

HA

SE

MA

IN C

B T

C-2

R,Y

,B-P

HA

SE

CA

RR

IER

SEN

D

DR

TR

IGG

ER

REL

AY

TYPE

FUN

CTI

ON

DEV

ICE

NO

.

DESCRIPTIONx x x x x x LINE DISTANCE PROTECTION- Z1x x x x x LINE DISTANCE PROTECTION- Z2, Z3, Z4(Reverse)x x x x x SOTF (IN-BUILT IN 21)x x x x x x E/F PROTECTION, Iox x A/R UNSUCCESSFULx x x INTER-TRIP RECEIVEx TC-1 SUPERVISIONx x x x x LINE DIFFERENTIAL PROTECTIONx x x x x E/F PROTECTION, Iox TC-2 SUPERVISIONx x LBB PROTECTION (INBUILT IN 87BB)x x x x BUSBAR PROTECTIONx x CB MANUAL TRIP

-

2167N -

87L67N -

7UT633

7SA6126

7SD5226

87BB50BF