SET.6 of 12 Settings Sheets for the SEL-551 Relay
SEL
OGIC Control Equation Settings (SET L Command)
SEL-551 Relay Instruction Manual Date Code 20110408
Date________________
SV13 Pickup Time (0–54000.000 cycles in 0.125-cycle steps) SV13PU =
SV13 Dropout Time (0–54000.000 cycles in 0.125-cycle steps)
SV13DO =
SV14 Pickup Time (0–54000.000 cycles in 0.125-cycle steps)
SV14PU =
SV14 Dropout Time (0–54000.000 cycles in 0.125-cycle steps)
SV14DO =
Other System Parameters (see Settings Explanations on page 4.18)
Nominal Frequency (50, 60 Hz) NFREQ =
Phase Rotation (ABC, ACB)
PHROT =
Date Format (MDY, YMD)
DATE_F =
SELOGIC Control Equation Settings (SET L Command)
SELOGIC
®
control equations consist of Relay Word Bits (see Table 4.5 and Table 4. 6) and SELOGIC operators *
(AND), + (OR), ! (NOT), and ( ) (parentheses). See Section 3: Relay Elements and Logic for SEL
OGIC control
equations details and examples. SEL
OGIC control equation settings can also be set directly to 1 (logical 1) or 0
(logical 0).
Trip Logic (see Figure 3.13)
Trip Conditions TR =
Unlatch Trip Conditions
ULTR =
Torque Control for Time-Overcurrent Elements (see Figure 3.9–Figure 3.12)
NOTE: Torque control equation settings cannot be set directly to logical 0.
Phase Element 51P1T
51P1TC =
Phase Element 51P2T
51P2TC =
Neutral Ground Element 51N1T
51N1TC =
Residual Ground Element 51G1T
51G1TC =
Negative-Sequence Element 51Q1T
51Q1TC =
Negative-Sequence Element 51Q2T
51Q2TC =
Close Logic (see Figure 3.14)
Circuit Breaker Status 52A =
Close Conditions
(other than automatic reclosing or CLOSE command)
CL =
ULCL Unlatch Close Conditions
ULCL =
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