SET.10
of 26
SEL-351A-1 Settings Sheets
SEL
OGIC Control Equation Settings (Serial Port Command SET L)
SEL-351A-1 Relay Instruction Manual Date Code 20080213
Date________________
SELOGIC Control Equation Settings
(Serial Port Command SET L)
SELOGIC control equation settings consist of Relay Word bits (see Table 9.5 ) and SELOGIC control
equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge), and ( ) (parentheses).
Numerous SEL
OGIC control equation settings examples are given in Section 3: Overcurrent, Voltage,
Synchronism Check, and Frequency Elements through Section 8: Breaker Monitor and Metering.
SEL
OGIC control equation settings can also be set directly to 1 (logical 1) or 0 (logical 0). Appendix G:
Setting SEL
OGIC Control Equations gives SELOGIC control equation details, examples, and
limitations.
Trip Logic Equations (See Figure 5.1)
Other trip conditions TR =
Switch-onto-fault trip conditions
TRSOTF =
Direct transfer trip conditions
DTT =
Unlatch trip conditions
ULTR =
Close Logic Equations (See Figure 6.1)
Circuit breaker status (used in Figure 5.3, also) 52A =
Close conditions (other than automatic reclosing or CLOSE
command)
CL =
Unlatch close conditions
ULCL =
Reclosing Relay Equations (See Reclosing Relay on page 6.12)
Reclose initiate 79RI =
Reclose initiate supervision
79RIS =
Drive-to-lockout
79DTL =
Drive-to-last shot
79DLS =
Skip shot
79SKP =
Stall open interval timing
79STL =
Block reset timing
79BRS =
Sequence coordination
79SEQ =
Reclose supervision (see Figure 6.2)
79CLS =
Latch Bits Set/Reset Equations (See Figure 7.11)
Set Latch Bit LT1 SET1 =
Reset Latch Bit LT1
RST1 =
Set Latch Bit LT2
SET2 =
Courtesy of NationalSwitchgear.com
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