Date Code 20010307
Overcurrent, Voltage, Synchronism Check, Frequency, and Power Elements
3-35
SEL-351-0, -1, -2, -3, -4 Instruction Manual
)LJXUH6HTXHQFH9ROWDJH(OHPHQWV'HOWD&RQQHFWHG9ROWDJHV
)LJXUH&KDQQHO969ROWDJH(OHPHQWV:\HRU'HOWD&RQQHFWHG9ROWDJHV
Accuracy
3LFNXS 9DQGRIVHWWLQJ^9YROWDJHLQSXWV`
9DQGRIVHWWLQJ^9YROWDJHLQSXWV`
7UDQVLHQW2YHUUHDFK RIVHWWLQJ
Voltage Element Operation
1RWHWKDWWKHYROWDJHHOHPHQWVLQ7DEOHDQG7DEOHDQG)LJXUHWKURXJK)LJXUHDUH
DFRPELQDWLRQRI³XQGHUYROWDJH´'HYLFHDQG³RYHUYROWDJH´'HYLFHW\SHHOHPHQWV
8QGHUYROWDJHHOHPHQWV'HYLFHDVVHUWZKHQWKHRSHUDWLQJYROWDJHJRHVEHORZWKHFRUUH
VSRQGLQJSLFNXSVHWWLQJ2YHUYROWDJHHOHPHQWV'HYLFHDVVHUWZKHQWKHRSHUDWLQJYROWDJH
JRHVDERYHWKHFRUUHVSRQGLQJSLFNXSVHWWLQJ