Sel 411L - Circuit Breaker Status Logic; Disconnect Logic

P.12.2
SEL-411L Relay Protection Manual Date Code 20151029
Bay Control
Circuit Breaker Status Logic
ACSELERATOR QuickSet
SEL-5030 Software
Bay Control Screens
For the bay control, ACSELERATOR QuickSet includes interactive one-line
diagram settings screens. This section presents
ACSELERATOR QuickSet one-
line diagram setting screen functionality.
Predefined Bay
Control One-line
Diagrams
The relay supports as many as 999 user-selectable bay configurations of which
25 are available in the relay. This section defines the one-line diagram and
illustrates the bay configurations supported in the relay.
➤ Main Bus and Auxiliary Bus on page P.12.38
➤ Bus 1, Bus 2, and Transfer Bus on page P.12.39
➤ Transfer Bay on page P.12.40
➤ Tie Breaker Bay on page P.12.41
➤ Main Bus and Transfer Bus on page P.12.41
➤ Main Bus on page P.12.42
➤ Breaker-and-a-Half on page P.12.43
➤ Ring Bus on page P.12.46
➤ Double Bus Double Breaker on page P.12.47
➤ Source Transfer Bus on page P.12.49
➤ Throw-Over Bus on page P.12.49
Circuit Breaker Status Logic
The relay includes circuit breaker status logic for three circuit breaker. The
circuit breaker status logic uses the 52k CLSM (k = 1, 2, or 3) Relay Word bit
and open-phase detection logic to determine the state of Circuit Breaker, and
declare Circuit Breaker 1, 2, or 3 alarm conditions. A Circuit Breaker alarm
condition is declared by the circuit breaker status logic when Relay Word bit
52k_ALM asserts.
Disconnect Logic
Disconnect Switch
Close and Open
Control Logic
Introduction
Figure 12.1 and Figure 12.2 shows the disconnect logic that generates open
and close output signals necessary to perform the open and close disconnect
operations. Use the seal-in timers (89CSTm and 89OSTm) to monitor and
control disconnect operations. All disconnect control methods (HMI, ASCII,
SEL
OGIC control equations, and Fast Operate) drive the close and open
control logic in the relay.