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Date Code 20011205
Application Settings for SEL-221 Series Relays
14-5
SEL-311B Instruction Manual
SEL-311B
Relay Setting
Calculated from
SEL-221F Settings
SEL-311B Instruction
Manual Section
SEL-221F Instruction
Manual Section
25VLO
= 27VLO • (1000 / SPTR)
Section 4—Synchronism
Check Element Settings
Section 5—Synchronism
Checking Function
25VHI
= 59VHI • (1000 / SPTR)
25SF None
25ANG1 None
25ANG2 None
SYNCP SYNCP
TCLOSD None
79OI1
= 79OI1
Section 6—Close and
Reclose Logic
Section 5—Reclose
Logic
79RSD
79RSLD
= 79RS
= 79RS
52AEND
= 52BT (Pickup)
Section 5—Switch-
Onto-Fault (SOTF) Trip
Logic
Section 5—52BT
Setting (52BT) And
Switch-Onto-Fault
Protection
SOTFD
= 52BT (Dropout)
TDURD
= TDUR
Section 4—Unlatch Trip Section 5—Trip
Duration Timer (TDUR)
SV1PU
= A1TP
Section 7—SEL
OGIC
control equation
Variables/Timers
Section 2—
Miscellaneous Timers
SV1DO =
A1TD
SV2PU
= VCT
Section 3—Voltage
Elements
SV2DO None
Section
7—Latch
Control Switches
* Curve U1 in the SEL-311B is slightly different from curve 1 in the SEL-221F. Time dial
adjustments may be necessary.
Note
: SEL-311B phase-to-phase fault detector settings (50PP1, 50PP2, 50PP3) are set to their
minimum values and hidden. This corresponds to SEL-221F setting 50P.
SEL-311B phase-to-ground and residual fault detector settings (50L1, 50L2, 50L3,
50GZ1, 50GZ2, and 50GZ3) are set to their minimum values and hidden. This
corresponds to SEL-221F setting 50NG
SEL-221F function “Remote End Just Opened” (REJO) is not implemented in the
SEL-311B.
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