Schweitzer Engineering Laboratories SEL-351-5, Instruction Manual

Page: 300 / 706

7.32
SEL-351-5, -6, -7 Relay Instruction Manual
Date Code 20070117
Inputs, Outputs, Timers, and Other Control Logic
Output Contacts
Output Contacts
Figure 7.27 and Figure 7.28 show the example operation of output contact
Relay Word bits (e.g., Relay Word bits OUT101–OUT107 in Figure 7.27 )
because of:
SELogic control equation operation (e.g., SEL
OGIC
control equation
settings OUT101–OUT107 in Figure 7.27 )
or
PULSE command execution
The output contact Relay Word bits in turn control the output contacts (e.g.,
output contacts
OUT101 – OUT107 in Figure 7.27 ).
Alarm logic/circuitry controls the ALARM output contact (see Figure 7.27 )
Figure 7.27 is used for following discussion/examples. The output contacts in
Figure 7.28 operate similarly.
Factory Settings
Example
In the factory SEL
OGIC
control equation settings, three output contacts are
used:
OUT101 =
TRIP
(overcurrent tripping/manual tripping; see Section 5: Trip
and Target Logic )
OUT102 =
CLOSE
(automatic reclosing/manual closing; see Section 6: Close
and Reclose Logic )
OUT103 =
SV1T
(breaker failure trip; see SEL
OGIC
Control Equation
Variables/Timers on page 7.28 )
OUT104 =
0
(output contact
OUT104
not used—set equal to zero)
•
•
•
OUT107 =
0
(output contact
OUT107
not used—set equal to zero)
Operation of Output
Contacts for Different
Output Contact Types
Output Contacts OUT101–OUT107
Refer to Figure 7.27 .
The execution of the serial port command PULSE n ( n = OUT101–OUT107)
asserts the corresponding Relay Word bit (OUT101–OUT107) to logical 1.
The assertion of SEL
OGIC
control equation setting OUT m ( m = 101–107) to
logical 1 also asserts the corresponding Relay Word bit OUT m ( m = 101–107)
to logical 1.
The assertion of Relay Word bit OUT m ( m = 101–107) to logical 1 causes the
energization of the corresponding output contact OUT m coil. Depending on
the contact type (a or b), the output contact closes or opens as demonstrated in
Figure 7.27 . An a-type output contact is open when the output contact coil is