Schweitzer Engineering Laboratories SEL-351A - Section 7: Inputs, Outputs, Timers, and Othercontrol Logic; Overview

Date Code 20080213 Instruction Manual SEL-351A Relay
Section 7
Inputs, Outputs, Timers,
and Other Control Logic
Overview
This section explains the settings and operation of:
Optoisolated Inputs on page 7.2, IN101–IN106
Local Control Switches (Only on Models With LCD) on page 7.5, local bits
LB1–LB16 models with LCD only
Remote Control Switches on page 7.9, remote bits RB1–RB16
Latch Control Switches on page 7.11, latch bits LT1–LT16
Multiple Setting Groups on page 7.18, group switching settings SS1–SS6
SEL
OGIC Control Equation Variables/Timers on page 7.27, SV1/SV1T–SV16/
SV16T
Output Contacts on page 7.31, OUT101–OUT107 and ALARM
Rotating Default Display (Only on Models With LCD) on page 7.34, display
points DP1–DP16, models with LCD only
The above items are all the logic input/output of the relay. They are combined
with the overcurrent, voltage, frequency, and reclosing elements in SEL
OGIC
®
control equation settings to realize numerous protection and control schemes.
Relay Word bits and SEL
OGIC control equation setting examples are used
throughout this section. See Section 9: Setting the Relay for more information
on Relay Word bits and SEL
OGIC control equation settings. See Section 10:
Serial Port Communications and Commands for more information on viewing
and making SEL
OGIC control equation settings (commands SHO L and
SET L).
Courtesy of NationalSwitchgear.com