Schweitzer Engineering Laboratories SEL-351S - Under- and Overvoltage Elements; Synchronism-Check Elements; Under- and Overfrequency Elements; Timers

Date Code 20011129 Introduction and Specifications 1-17
SEL-351S Instruction Manual
Under  and Overvoltage Elements
3LFNXS5DQJHV ±99VWHSVYDULRXVHOHPHQWV
±99VWHSVSKDVHWRSKDVH
HOHPHQWV
6WHDG\6WDWH3LFNXS$FFXUDF\ 9DQGRIVHWWLQJ
7UDQVLHQW2YHUUHDFK RISLFNXS
Synchronism-Check Elements
6OLS)UHTXHQF\3LFNXS5DQJH ±+]+]VWHSV
6OLS)UHTXHQF\3LFNXS$FFXUDF\ +]
3KDVH$QJOH5DQJH ±VWHSV
3KDVH$QJOH$FFXUDF\ 
Under- and Overfrequency Elements
3LFNXS5DQJH ±+]+]VWHSV
6WHDG\6WDWHSOXV7UDQVLHQW2YHUVKRRW +]
7LPH'HOD\ ±F\FOHVF\FOHVWHSV
7LPHU$FFXUDF\ F\FOHDQGRIVHWWLQJ
8QGHUYROWDJH)UHTXHQF\(OHPHQW%ORFN
5DQJH
±9
Timers
3LFNXS5DQJHV ±F\FOHVF\FOHVWHSV
UHFORVLQJUHOD\DQGVRPHSURJUDPPDEOHWLPHUV
±F\FOHVF\FOHVWHSVVRPH
SURJUDPPDEOHDQGRWKHUYDULRXVWLPHUV
3LFNXSDQGGURSRXWDFFXUDF\IRUDOOWLPHUV F\FOHDQGRIVHWWLQJ
Substation Battery Voltage Monitor
3LFNXS5DQJH ±9GF9GFVWHSV
3LFNXS$FFXUDF\ RIVHWWLQJ