Sel 411L - Overview; Section 12: Bay Control

Date Code 20151029 Protection Manual SEL-411L Relay
Section 12
P.Protection Manual
Bay Control
Overview
The relay provides one-line bay configuration on the front-panel screen with
disconnect and breaker control capabilities for predefined user selectable
busbar and bay types. Additional user-selectable bay types are available via an
ACSELERATOR QuickSet
®
SEL-5030 Software interface that can be
downloaded at www.selinc.com. With the bay control, you can control as
many as 10 disconnects (m = 01–10) and 2 circuit breakers. You can operate
disconnects and breakers with ASCII commands, SEL
OGIC
®
control
equations, Fast Operate Messages, and from the one-line diagram on the front-
panel screen. One-line diagrams include user-configurable apparatus labels
and as many as 24 user-definable analog quantities. This section covers all
aspects of the bay control.
Circuit Breaker
Status Logic
The circuit breaker state and circuit breaker alarm conditions are determined
by the circuit breaker status logic presented in this section (see Circuit Breaker
Status Logic).
Disconnect (Isolator)
Logic
The disconnect logic in the relay safely operates the disconnect switches and
reports status of the disconnect switches. The disconnect logic is independent
for each of the disconnect switches. This section presents the disconnect logic
and definitions of close, open, and undetermined state indications.
➤ Disconnect Switch Close and Open Control Logic on page P.12.2
➤ Disconnect Switch Status and Alarm Logic on page P.12.6
➤ Close, Open, and Undetermined State Indications on page P.12.11
Bay Control Front-
Panel Operations
The one-line diagram in the relay presents the bay configuration on the front-
panel display. Breaker and disconnect switch control within the one-line
diagram is one of the supported means of operating breakers and disconnect
switches. This section presents the unique one-line diagram front-panel
operations in the relay and definitions of symbols in the one-line diagrams.
➤ Bay Control Front-Panel Operations on page P.12.1
➤ One-Line Diagram and Labels on page P.12.13
➤ Front-Panel Pushbutton Navigation Operations in the One-
Line Diagram on page P.12.13
➤ Circuit Breaker and Disconnect Definitions and State
Representations on page P.12.14
➤ Circuit Breaker and Disconnect Switch Operations From the
Front Panel on page P.12.16