Schweitzer Engineering SEL-351P - Section 7: Inputs, Outputs, Timers, and Other; Control Logic; Optoisolated Inputs

Date Code 990215 Inputs, Outputs, Timers, and Other Control Logic 7-1
SEL-351P Manual Técnico
SECTION 7: INPUTS, OUTPUTS, TIMERS, AND OTHER
CONTROL LOGIC
This section explains the settings and operation of:
• Optoisolated inputs
IN101 - IN106
• Extra local control switches
local bits LB1 - LB8
• Remote control switches
remote bits RB1 - RB8
• Latch control switches
latch bits LT1 - LT8
• Multiple setting groups
group switching settings SS1 - SS6
• SEL
OGIC
®
Control
Equations
variables/timers
SV1/SV1T - SV16/SV16T
• Output contacts
OUT101 - OUT107 and ALARM
• Rotating default displays
display points DP1 - DP8
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 SEL-351P Recloser Control 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).
O PTOISOLATED I NPUTS
Figure SECTION 7: .1 shows the resultant Relay Word bits (e.g., Relay Word bits IN101
through IN106 in
Figure SECTION 7: .1) that follow corresponding optoisolated inputs (e.g.,
optoisolated inputs IN101 through IN106 in
Figure SECTION 7: .1) for the different SEL-351P
Recloser Control models. The figures show examples of energized and deenergized optoisolated
inputs and corresponding Relay Word bit states. To assert an input, apply rated control voltage
to the appropriate terminal pair (see Figure 2 and Figure 3 in the Installation section of the SEL-
351P Quick-Start Installation and User’s Guide).