Breaker Control - GE 845 Instruction Manual

CONTROL

Breaker Control

NOTE:
4–296
The 845 relay supports breaker control for up to three breakers. The Breaker Control menu
is designed to Trip and Close the Breaker either remotely (LOCAL MODE setpoint set to "Off",
or the selected LOCAL MODE input de-asserted), or locally (the selected LOCAL mode
setpoint asserted). While in Local mode, the LED "LOCAL MODE" is lit, and the Remote Open
and Remote Close setpoints are not active.
By default, Breaker control mode is set to Remote (LOCAL MODE set to Off). In this mode,
the Remote Open and Remote Close setpoints are active.
Local – the Breaker is controlled open/close from the relay pushbuttons (PBs).
Remote – the Breaker is controlled open/close from any assigned and asserted FlexLogic
operand, contact input, virtual input, virtual output, remote input, or via communication.
To close a breaker using Syncheck, create a Virtual Output in the FlexLogic that is equal to
a simple AND gate between the breaker closing signal and the Syncheck permission
operand. This Virtual Output can then be assigned in the Breaker Control element and used
for closing the desired breaker.
Setpoints
Path:
Setpoints > Control > Breaker Control
Setpoints\Control\Breaker Control
Item Name
Local Mode
Breaker Select Timeout
Remote Open BKR1
Remote Open BKR2
Remote Open BKR3
Remote Close BKR1
Remote Close BKR2
Remote Close BKR3
Events
BrkCntr
LOCAL MODE
Range: Off, On, Any FlexLogic operand
Default: Off
The LOCAL MODE setting places the relay in Local mode. The relay is in Remote mode
(LOCAL mode set to Off, or the programmed input de-asserted), if not forced into Local
mode by the assertion of the assigned input for this setpoint. The three control PBs on
the relay faceplate are active when the relay is in Local mode.
BREAKER SELECT TIMEOUT
Range: 1 to 60 min in steps of 1 min
Default: 5 min
This setting specifies the available time for open/close commands, after the breaker has
been selected.
REMOTE OPEN BKR1
Range: Any FlexLogic operand
Default: Off
The setting specifies the input which when asserted initiates a Trip command to the
output relay selected to trip Breaker 1. When the selected input is asserted, the trip
contact will be energized and will stay energized until the input drops off, breaker opens,
Value
Off
5
Off
Off
Off
Off
Off
Off
Enabled
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Unit
min