Auxiliary Output Relays - GE 850 Instruction Manual

OUTPUTS
Auxiliary Output
Relays
5–102
The 850 relay is equipped with Auxiliary Output relays. The I/O cards, and the number of
auxiliary output relays are defined at the time of relay ordering. Auxiliary Relays can be
energized directly from the menu of the protection or control feature or from their
respective menus by assigning a FlexLogic operand (trigger) under the setpoint "Aux Rly #
Operate".
Changing the state of any of the Auxiliary Relays will be inhibited if the 850 relay is in "Not
Ready" mode.
NAME
Range: Up to 13 alphanumeric characters
Default: Aux Rly #
The setpoint is used to name the auxiliary output 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
When type = Pulsed is selected, the setpoint "AUX RLY # SEAL-IN TIME" is displayed in the
menu for selection of the time interval for which the output relay will remain Energized.
The actual time, for which the output relay stays energized, starts from the time of
output first trigger, and ends when Output Seal-In Time expires. The Seal-In time applies
at the dropdown edge of the output relay. If during timing out of the Seal-In Time,
another pulse/pulses occur, the Seal-In Time will be reapplied to the last pulse, resulting
in prolonged time for which the output will stay energized before going to de-energized
mode.
BLOCK
Range: Disabled, Any FlexLogic operand
Default: Disabled
This setting defines a block to the Auxiliary output relay. When the selected input is
asserted, the Aux relay is blocked.
OPERATE
Range: Off, Any FlexLogic operand
Default: Off
This setpoint provides a selection of any operand from the list of FlexLogic or
communications, which can be used to energize the auxiliary output relay.
TYPE
Range: Self-Reset, Latched, Pulsed
Default: Pulsed
If Self-Reset is selected, the output relay is energized as long as the element is in
operating mode, and resets when the element drops out. If Latched is selected, the
output relay stays energized upon element dropout. The latched auxiliary outputs can
be reset by issuing a reset command. For Pulse selection, see SEAL-IN TIME (displayed
only if Type = Pulsed).
OPERATION
Range: Non-Failsafe, Failsafe
Default: Non-Failsafe
Failsafe operation causes the output relay to be energized when the operand assigned
to the OPERATE AUX RLY # setting is low and de-energized when the same operand 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 850. 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 850 (if not already activated by a protection
element).
CHAPTER 5: DEVICE, SYSTEM, INPUT AND OUTPUT SETPOINTS
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL