Schweitzer Engineering Laboratories SEL-311L Instruction Manual page 636

FOR THE
SEL C
OGIC
SEL control equation settings consist of Relay Word bits (see Tables 9.3 and 9.4) and
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SEL control equation operators * (AND), + (OR), ! (NOT), / (rising edge), \ (falling edge),
OGIC
and ( ) (parentheses). Numerous SEL
Sections 3 through 8. SEL
or 0 (logical 0). Appendix G: Setting SEL
equation details, examples, and limitations.
Trip Logic Equations (See Figure 5.4)
Direct trip conditions
Communications-assisted trip conditions
Switch-onto-fault trip conditions
Direct transfer trip conditions
Unlatch trip conditions
Communications-Assisted Trip Scheme Input Equations
Permissive trip 1 (used for ECOMM = POTT, DCUB1,
or DCUB2; see Figures 5.7, 5.9, and 5.12)
Loss-of-guard 1 (used for ECOMM = DCUB1 or
DCUB2; see Figure 5.12)
Permissive trip 2 (used for ECOMM = DCUB2; see
Figures 5.7 and 5.12)
Loss of guard 2 (used for ECOMM = DCUB2; see
Figure 5.12)
Block trip (used for ECOMM = DCB; see Figure 5.16)
Close Logic Equations (See Figure 6.1)
Circuit breaker status (used in Figure 5.5, also)
Close conditions (other than automatic reclosing or
CLOSE command)
Unlatch close conditions
Reclosing Relay Equations (See Reclosing Relay in Section 6 )
Reclose initiate
Reclose initiate supervision
Drive-to-lockout
Drive-to-last shot
Skip shot
Stall open interval timing
Block reset timing
Sequence coordination
Reclose supervision (see Figure 6.2)
Date Code 20010625
S
ETTINGS
SEL-311L R
E S
ONTROL QUATION
OGIC
control equation settings can also be set directly to 1 (logical 1)
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S
HEET
(APP = 87L21P)
ELAY
(S P
ETTINGS ERIAL ORT
control equation settings examples are given in
Control Equations gives SEL
OGIC
TR =
TRCOMM =
TRSOTF =
DTT =
ULTR =
PT1 =
LOG1 =
PT2 =
LOG2 =
BT =
52A =
CL =
ULCL =
79RI =
79RIS =
79DTL =
79DLS =
79SKP =
79STL =
79BRS =
79SEQ =
79CLS =
Page 8
OF
Date
C SET L)
OMMAND
control
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22