Breakers - GE 845 Instruction Manual

BREAKERS

Breakers
5–4
Figure 5-4: Tab pushbutton summary (left) and detailed view (right)
Only the tab pushbuttons that are not set to Disabled are shown in color; labels for the tab
pushbuttons are shown for both active and disabled pushbuttons if labels have been
configured. (Configure tab pushbuttons from
When the actual button is pressed, the button on the screen is highlighted in blue and the
PB [X] PRESS operand becomes active. Although a disabled pushbutton can be pressed, no
action is taken and its operands are not activated. Pressing ESCAPE returns the screen to
Tab Pushbutton summary page. The Short Text for each Tab Pushbutton is used on the
Summary Page.
Pressing >> shows the next set of tab pushbuttons. For example, when in the page with
pushbuttons 1 to 4, pressing >> will navigate to the screen with pushbuttons 5 to 8. By
pressing >>, the user can cycle through all five pushbutton screens. To go from page 2 to
page 1, one must press >> 4 times to cycle through and navigate to page 1 with
pushbuttons 1 to 4. Alternatively, one can escape to the overall summary screen and
navigate to any desired page of pushbuttons.
The status of the breaker/breakers is displayed individually. If the selected trip output relay
is Form A-type, the status of the breaker Trip and Close circuitry is also displayed here. The
screen includes the total accumulated arcing current information for the breaker as well.
Path:
Status > Breaker > Breaker X
STATE
Range: Not Configured, Opened, Closed, Unknown
The Unknown state is displayed upon discrepancy of the 52a and 52b contacts for more
than 30 milliseconds.
TRIP COIL
The Trip Coil state is displayed when Form -A output relays are used, and Trip Coil
monitoring is enabled.
CLOSE COIL
The Close coil state is displayed when Form -A output relays are used, and Close Coil
monitoring is enabled.
TOTAL ARCING CURRENT
The measure of arcing current from all three phases during breaker trips. Refer to the
Breaker Arcing Current element description for more details.
Device > Front Panel > Tab PBs > Tab PB1(X)
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: STATUS
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