Auxiliary Relay Selected For Breaker Trip - GE 845 Instruction Manual

CHAPTER 4: SETPOINTS
Auxiliary Relay
selected for breaker
Trip
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
to maintain a process running, or to hold a motor contactor while energized, the process or
the motor contactor will be interrupted. To keep the process uninterrupted, the following
connection scheme can be applied:
Figure 4-52: Maintaining uniterrupted process upon a relay Major Error
If the output relay is energized during 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 operand from the list of FlexLogic operands
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.
OUTPUTS
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