Date Code 20151029 Protection Manual SEL-411L Relay
Section 14
P.Protection Manual
SELOGIC Control Equation Programming
This section describes use of SELOGIC
®
control equation programming to
customize relay operation and automate substations. This section covers the
following topics:
➤ SELOGIC Control Equation History on page P.14.1
➤ Separation of Protection and Automation Areas on page P.14.2
➤ SELOGIC Control Equation Programming on page P.14.3
➤ SELOGIC Control Equation Setting Structure on page P.14.6
➤ Multiple Setting Groups on page P.14.8
➤ SELOGIC Control Equation Capacity on page P.14.10
➤ SELOGIC Control Equation Elements on page P.14.11
➤ SELOGIC Control Equation Operators on page P.14.24
➤ Effective Programming on page P.14.33
➤ SEL-311 and SEL-351 Series Users on page P.14.35
SELOGIC Control Equation History
SEL introduced SELOGIC control equations in the SEL-300 series relays to
provide relay operation customization. SEL
OGIC control equations in the relay
provide both protection application flexibility and a platform for substation
automation.
SEL
OGIC control equation programming in the relay includes several features
and capabilities not included in SEL-300 series relays. The new features with
a brief description are listed in Table 14.1.
Use SEL
OGIC control equations in the relay to customize protection operation,
create custom protection elements, and automate substation operation. The
relay introduces several advanced programming features, operators, and
Table 14.1 Advanced SELOGIC Control Equation Features
Feature Description
Protection/automation separation Segregation of protection and automation work and settings
Free-form logic Custom logic operation and execution order
Comments Documentation of SEL
OGIC control equations within the equation
Math operations Calculations for automation or extended protection functions
Sequencing timers Additional timers designed for sequencing automated operations
Counters Increased sophistication in custom protection and automation programming
Aliases Custom programming is more readable when you rename as many as 200 analog or digital
quantities
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