GE L90 Instruction Manual page 375

CHAPTER 5: SETTINGS
The breaker control element contains the auxiliary logic for status and serves as the interface for opening and closing of a
circuit breaker from protection, autoreclose, SCADA, or through the front panel interface. The breaker control element can
be used to create interlocking functionality. For greater security in determination of the breaker position, both the 52/a and
52/b auxiliary contacts are used with reporting of the discrepancy between them.
To use this element, configure the contact outputs that trip and close the breaker to use FlexLogic operands
(or in the case of single-pole tripping) and
CMD BREAKER 1 TRIP A/B/C
element inputs as described here.
A description of the operation of the breaker control and status monitoring features from the front panel is provided in
chapter 4.
Breaker control element 1 and Breaker control element 2 are permanently attached to Autoreclose element
functions BKR1 and BKR2 respectively.
Breaker control element 1 is permanently attached to the Trip Output element.
There are two breaker control elements for each CT/VT module installed. The following settings are available for each
breaker control element.
— This setting enables and disables the operation of the breaker 1 control feature.
BREAKER 1 FUNCTION
BREAKER1 PUSH BUTTON CONTROL
— Set to "Enable" to allow the graphical front panel to tag breaker 1. When tagged, the following
BREAKER1 TAGGING
operations are disabled: pushbutton open/close, IEC 61850 open/close, autoreclose command issued by the autoreclose
element, and close command initiated by
setting is not affected.
BREAKER 1 OPEN
— Set to "Enable" to allow the graphical front panel to substitute breaker 1 status. When substituted,
BREAKER1 SUBSTITUTN
breaker 1 control open/close status is forced to the substituted value.
— Set to "Enable" to allow the graphical front panel to bypass breaker 1 interlocking. When asserted,
BREAKER1 BYPASS
and
BREAKER 1 BLK OPEN BREAKER 1 BLK CLOSE
— Set to "Enable" to allow the graphical front panel to issue a BLOCK AR command and generate the
BREAKER1 AR BLOCK
operand, which blocks the breaker 1 close command from the Autoreclose element.
BREAKER 1 BLK RCLS
The autoreclose element operates for BKR1 and BKR2 only.
Once is asserted from the front panel, the breaker reclosing is not allowed. Note that the autoreclose element is
AR BLOCK
not automatically inhibited by
or in the autoreclose element with the
AR BLOCK BKR1 AR BLOCK
— Assign a user-defined name (up to six characters) to the breaker. This name is used in flash messages
BREAKER 1 NAME
related to breaker 1.
— Selects "3-Pole" mode, where all breaker poles are operated simultaneously, or "1-Pole" mode where all
BREAKER 1 MODE
breaker poles are operated either independently or simultaneously.
— Selects an operand that when activated, and unless blocked, initiates the Breaker 1 open and individual
BREAKER 1 OPEN
phase trip commands.
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
BREAKER 1 OUT OF SV:

Off
BREAKER 1 RACKED-IN:

Off
BREAKER 1 EVENTS:

Disabled
— Set to "Enable" to allow front panel pushbutton open/close control operations.
setting. The trip command issued by the Trip Out element or
BREAKER 1 CLOSE
settings are bypassed.
from the front panel. If the autoreclose scheme needs to be inhibited, set setting
BLOCK AR
Range: FlexLogic operand
Range: FlexLogic operand
Range: Disabled, Enabled
CMD, and configure the breaker control
BREAKER 1 ON
operand.
BREAKER 1 BLK RCLS
SYSTEM SETUP
BREAKER 1 OFF
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