Auxiliary Relay Selected For Breaker Trip - GE 845 Instruction Manual

OUTPUTS
Auxiliary Relay
selected for breaker
Trip
NOTE:
4–130
If the output relay is energized during the In-Service relay condition, the NO contact will be
closed, and the NC contact will be open. The process is running. If the relay goes into "Out-
of-Service" mode, the output relay will be de-energized, and the process will still be
running, as the NC contact will be closed. An external switch, or stop pushbutton must be
installed in series to the relay output contacts, so that one can stop the process if needed.
Path: Setpoints > Outputs > Output Relays > Aux Relay 1
NAME
Range: Up to 13 alphanumeric characters
Default: Aux Relay 1
The setpoint is used to name the Trip relay by selecting up to 13 alphanumeric
characters.
SEAL-IN TIME (displayed only if Type=Pulsed)
Range: 0.00 to 9.99 s in steps of 0.01 s
Default: 0.10 s
This setting defines the time to be added to the Reset time of Relay 1 "Trip" output, thus
extending its pulse width. This is useful for those applications where the 52 contacts
reporting the breaker state are faster than the 52 contacts that are responsible for
interrupting the coil current.
BLOCK
Range: Disabled, Any FlexLogic operand
Default: Disabled
This setting defines a Block to the Trip output relay. When the selected input is asserted,
the Trip output relay is blocked.
TYPE
Range: Self-Reset, Latched, Pulsed
Default: Latched
This setting defines the sequence type of the Trip output relay. The functionality is
described in the Outputs > Output Relays > Trip and Close Relays section.
OPERATION
Range: Non-Failsafe, Failsafe
Default: Non-Failsafe
Failsafe operation causes the output relay to be energized when the Trip condition
signal is low and de-energized when the same signal is high. A failsafe relay also
changes state (if not already activated by an operand driving this output relay) when
control power is removed from the 845. Conversely a non-failsafe relay is de-energized
in its normal non-activated state and will not change state when control power is
removed from the 845 (if not already activated by a protection element).
EVENTS
Range: Disabled, Enabled
Default: Enabled
When the setpoint Function in the protection element menu is set to "Trip", the output
relays selected under the Breaker menu for breaker tripping need to be re-selected from
the protection element menu. These output relays will not be operational even if selected
to operate from the protection element menu, if the function is set to "Alarm", "Latched
Alarm", or "Configurable".
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS