GE G30 Instruction Manual page 373

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.
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, and close command initiated by
setting. The trip command issued by the Trip Out element or
— 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
— 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.
— Selects an operand that prevents initiation of Breaker 1 open and individual phase trip commands.
BREAKER 1 BLK OPEN
This setting can be used for blocking circuit breaker tripping for instance when breaker monitoring detects conditions such
as low SF gas density during which breaker opening can cause damage.
6
— Selects an operand that when activated, and unless blocked, initiates the Breaker 1 close commands.
BREAKER 1 CLOSE
— Selects an operand that prevents initiation of Breaker 1 close commands. This setting can be used
BREAKER 1 BLK CLOSE
for blocking circuit breaker closing, for instance to prevent closing into a closed ground switch.
— Selects an operand, usually a contact input connected to a breaker auxiliary position tracking
BREAKER1 ΦA/3P CLSD
mechanism. This input is for a normally-open 52/a status input that creates a logic 1 when the breaker is closed. If the
setting is selected as "3-Pole," this setting selects a single 52/a input as the operand used to track the
BREAKER 1 MODE
breaker open or closed position. If the mode is selected as "1-Pole," the input mentioned is used to track phase A and the
and
BREAKER 1 ΦB BREAKER 1 ΦC
— Selects an operand, usually a contact input, that is for a normally-closed 52/b status input that
BREAKER1 ΦA/3P OPND
creates a logic 1 when the breaker is open. If a separate 52/b contact input is not available, then the inverted 52/a status
signal or the inverted
BREAKER 1 CLOSED
— If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-
BREAKER 1 ΦB CLOSED
pole, this input is used to track the breaker phase B closed position as outlined for phase A.
— If the mode is selected as three-pole, this setting has no function. If the mode is selected as single-
BREAKER 1 ΦB OPENED
pole, this input is used to track the breaker phase B opened position as outlined for phase A.
G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
BREAKER 1 RACKED-IN:

Off
BREAKER 1 EVENTS:

Disabled
— Set to "Enable" to allow front panel pushbutton open/close control operations.
BREAKER 1 OPEN
settings are bypassed.
settings select operands to track phases B and C, respectively.
status signal can be used.
Range: FlexLogic operand
Range: Disabled, Enabled
CMD, and configure the breaker control
BREAKER 1 ON
setting is not affected.
SYSTEM SETUP
BREAKER 1 OFF
BREAKER 1 CLOSE
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