5-20 Control Logic Date Code 20010731
SEL-352-1, -2 Instruction Manual
86BFT Target LED
The relay illuminates the 86BFT target LED whenever the breaker failure lockout relay trip bit
(86BFT) in Relay Word Row 69 asserts. This bit is typically assigned to an output contact to
pick up a lockout relay because of a breaker failure condition. The 86BFT Target LED latches
when the 86BFT bit asserts. The 86BFT Target LED extinguishes when the condition goes away
and either the Target Reset button is pushed or the TAR R command is issued to one of the
serial ports. Figure 5.10 shows the 86BFT target LED logic.
Figure 5.10: 86BFT Target LED Logic
86RS Target LED
The relay illuminates and latches the 86RS target LED whenever the breaker failure lockout
relay reset element (86RS) in Relay Word Row 69 asserts. This bit is typically assigned to an
output contact to reset a lockout relay after timing toward a breaker failure condition. The 86RS
Target LED latches when the bit asserts. The 86RS Target LED extinguishes when the condition
goes away and either the Target Reset button is pushed or the TAR R command is issued to one
of the serial ports. Figure 5.11 shows the 86RS target LED logic.
Figure 5.11: 86RS Target LED Logic
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