Sel SEL-351A - Directional Control Option; Torque Control

3-20 Overcurrent, Voltage, Synchronism Check, and Frequency Elements Date Code 20010307
SEL-351A Instruction Manual
Directional Control Option
5HIHUWR)LJXUH
6HH)LJXUHLQ6HFWLRQ/RVVRI3RWHQWLDO/RDG(QFURDFKPHQWDQG'LUHFWLRQDO(OHPHQW
/RJLFIRUPRUHLQIRUPDWLRQRQWKHRSWLRQDOGLUHFWLRQDOFRQWURO,IWKHGLUHFWLRQDOFRQWUROHQDEOH
VHWWLQJ(LVVHW
 ( 1
WKHQGLUHFWLRQDOFRQWUROLVGHIHDWHGDQGWKHGLUHFWLRQDOFRQWUROLQSXWLQWRORJLFSRLQW7&3LQ
)LJXUHLVDVVHUWHGWRORJLFDOFRQWLQXRXVO\7KHQRQO\WKHFRUUHVSRQGLQJ6(/
2*,&FRQWURO
HTXDWLRQWRUTXHFRQWUROVHWWLQJ37&KDVWREHFRQVLGHUHGLQWKHFRQWURORIORJLFSRLQW7&3
DQGWKXVLQWKHFRQWURORIWKH7RUTXH&RQWURO6ZLWFKDQGSKDVHWLPHRYHUFXUUHQWHOHPHQW
37
Torque Control
5HIHUWR)LJXUH
6(/
2*,&FRQWUROHTXDWLRQWRUTXHFRQWUROVHWWLQJVHJ37&FDQQRWEHVHWGLUHFWO\WRORJLFDO
7KHIROORZLQJDUHVHWWLQJH[DPSOHVRI6(/
2*,&FRQWUROHTXDWLRQWRUTXHFRQWUROVHWWLQJ37&
IRUSKDVHWLPHRYHUFXUUHQWHOHPHQW37
([DPSOH 37& 
   6HWWLQJ37&VHWGLUHFWO\WRORJLFDO
 7KHQRQO\WKHFRUUHVSRQGLQJGLUHFWLRQDOFRQWUROLQSXWIURP)LJXUHKDV
WREHFRQVLGHUHGLQWKHFRQWURORIORJLFSRLQW7&3DQGWKXVLQWKHFRQWURO
RIWKH7RUTXH&RQWURO6ZLWFKDQGSKDVHWLPHRYHUFXUUHQWHOHPHQW37
 ,IGLUHFWLRQDOFRQWUROHQDEOHVHWWLQJ( 1WKHQORJLFSRLQW
7&3 ORJLFDODQGWKXVWKH7RUTXH&RQWURO6ZLWFKFORVHVDQGSKDVH
WLPHRYHUFXUUHQWHOHPHQW37LVHQDEOHGDQGQRQGLUHFWLRQDO
1RWH $OORYHUFXUUHQWHOHPHQW6(/
2*,&FRQWUROHTXDWLRQWRUTXHFRQWUROVHWWLQJV
DUHVHWGLUHFWO\WRORJLFDOHJ37& IRUWKHIDFWRU\GHIDXOW
VHWWLQJV6HH6+2&RPPDQG6KRZ9LHZ6HWWLQJVLQ6HFWLRQ6HULDO
3RUW&RPPXQLFDWLRQVDQG&RPPDQGVIRUDOLVWRIWKHIDFWRU\GHIDXOW
VHWWLQJV
([DPSOH 37& ,1 
   ,QSXW,1GHDVVHUWHG37& ,1 ORJLFDO
 7KHQORJLFSRLQW7&3 ORJLFDODQGWKXVWKH7RUTXH&RQWURO6ZLWFK
RSHQVDQGSKDVHWLPHRYHUFXUUHQWHOHPHQW37LVGHIHDWHGDQGQRQRSHUD
WLRQDOUHJDUGOHVVRIDQ\RWKHUVHWWLQJ