Schweitzer Engineering Laboratories SEL-351S - Vbase Initialization

3-54 Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements Date Code 20010112
SEL-351S Instruction Manual
7KHXVHRID96$*VHWWLQJKLJKHUWKDQSHUFHQWDWWKHVDPHWLPHDVD96:(//VHWWLQJORZHU
WKDQSHUFHQWVKRXOGEHFDUHIXOO\FRQVLGHUHG0RYLQJWKHVHWKUHVKROGVWRRFORVHWRJHWKHU
LQFUHDVHVWKHSUREDELOLW\WKDWDQHQGRIGLVWXUEDQFHFRQGLWLRQLVPLVVHG7KLVFRXOGFUHDWHDIDOVH
VDJRUVZHOOFRQGLWLRQWKDWPD\QRWFOHDULWVHOIXQWLOWKHQH[WGLVWXUEDQFHWKXVFDXVLQJWKH9EDVH
WKHUPDOHOHPHQWWRUHPDLQEORFNHG
9EDVHWKHUPDOHOHPHQWEORFNLQJE\WKH)$8/75HOD\:RUGELWLVSURJUDPPDEOHYLD6(/
2*,&
VHWWLQJ)$8/76(/
2*,&FRQWUROHTXDWLRQVHWWLQJ)$8/7DOVRFRQWUROVRWKHUUHOD\IXQFWLRQV
VHHVXEVHFWLRQ6(/
2*,&&RQWURO(TXDWLRQ6HWWLQJ)$8/7LQ6HFWLRQ7ULSDQG7DUJHW
/RJLF








       
WLPHV
N
9
S
U
L
P
D
U
\
6ZHOOSLFNXS
6DJSLFNXS
,QWHUUXSWLRQSLFNXS
_9_
_9D__9E__9F_
9EDVH
6DJ
RYHUORDG
,QWHUUXSWLRQ
EUHDNHURSHQ
9EDVHVWRSV
WUDFNLQJ
9EDVHUHVXPHV
WUDFNLQJ
':*06

)LJXUH9EDVH7UDFNLQJ([DPSOH7KUHH3KDVH'LVWXUEDQFH
Vbase Initialization
7KH9EDVHWKHUPDOHOHPHQWLVDXWRPDWLFDOO\LQLWLDOL]HGZKHQWKHUHOD\LVSRZHUHGXSDQGDOVR
DIWHUDVHWWLQJVFKDQJHRUJURXSFKDQJHWKDWUHVXOWVLQDQHZ(66, <FRQGLWLRQ
9EDVHFDQDOVREHIRUFHGWRLQLWLDOL]HE\LVVXLQJWKH66,5FRPPDQG$FFHVV/HYHO
'XULQJLQLWLDOL]DWLRQWKH66,HOHPHQWVDUHGHDVVHUWHGDQGWKH66,5HFRUGHULVGLVDEOHGXQWLODOORI
WKHIROORZLQJFRQGLWLRQVDUHPHW
 _9_!_9_FRUUHFWSKDVHURWDWLRQFKHFN
 _9_!_9_FRUUHFWSKDVHFRQQHFWLRQFKHFN
 9D9EDQG9FDUHDOOJUHDWHUWKDQ9VHFRQGDU\
 )$8/7LVGHDVVHUWHG
 _9_LVZLWKLQWKUHHSHUFHQWRIWKHFDOFXODWHG9EDVHYDOXH
 $WOHDVWWZHOYHVHFRQGVKDYHHODSVHG