Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

Page: 273 / 706

7.5
Date Code 20070117
Instruction Manual SEL-351-5, -6, -7 Relay
Inputs, Outputs, Timers, and Other Control Logic
Optoisolated Inputs
Default Display on page 7.36 )]. 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 is used in the factory 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 de-energized 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) is set at:
IN102D =
0.50 cycles
to provide input energization/de-energization debounce.