Schweitzer Engineering Laboratories SEL-311L, Instruction Manual, Page: 256 / 734

7-4 Inputs, Outputs, Timers, and Other Control Logic Date Code 20010625
SEL-311L Instruction Manual
The pickup/dropout timer for input IN101 (IN101D) might be set at:
IN101D = 0.75 cycles
to provide input energization/deenergization debounce.
Using Relay Word bit IN101 for the circuit breaker status setting 52A does not prevent using
Relay Word bit IN101 in other SEL
OGIC
control equation settings.
Input IN102
Relay Word bit IN102 (Figure 7.2) is used in the settings for the SEL
OGIC
control equation
drive-to-lockout setting:
79DTL = !IN102 + ... [=NOT(IN102) + ...]
Connect input IN102 to a reclose enable switch.
When the reclose enable switch is open, input IN102 is deenergized and the reclosing relay is
driven to lockout:
79DTL = !IN102 + ... = NOT(IN102) + ... = NOT(logical 0) +... = logical 1
When the reclose enable switch is closed, input IN102 is energized and the reclosing relay is
enabled, if no other setting condition is driving the reclosing relay to lockout:
79DTL = !IN102 + ... = NOT(IN102) + ... = NOT(logical 1) +... = logical 0 + ...
See Section 6: Close and Reclose Logic for more information on SEL
OGIC
control equation
setting 79DTL.
The pickup/dropout timer for input IN102 (IN102D) in this example might be set at:
IN102D = 1.00 cycle
to provide input energization/deenergization debounce.