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OUTPUTS
Output Relay 1 (F1)
Trip
4–94
can be reset with a reset command. If the Self-reset type is selected, the output relay is
energized when the corresponding element operates and it stays energized until the
element drops out.
52a Contact Configured
Yes
Yes
No
No
CRITICAL FAILURE RELAY
The 8 Series relay is equipped with one output relay (# 8 - "Critical Failure Relay") for failsafe
indication. The Critical Failure Relay is a Form-C contact with one NO and one NC contact
(no control power). There are no user-programmable setpoints associated with this output
relay.
Path:
Setpoints > Outputs > Output Relays > Trip
NAME
Range: Up to 13 alphanumeric characters
Default: Trip
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.
52b Contact Configured
Yes
No
Yes
No
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS
Relay Operation
Trip Relay and Close Relays continue
operating until the switching device is
detected opened or closed using both
52a and 52b contacts as per switching
device detection logic.
The Trip Relay continues operating until
52a indicates an open switching device.
The Close Relay continues operating
until 52a indicates a closed switching
device.
The Trip Relay continues operating until
52b indicates an open switching device.
The Close Relay continues operating
until 52b indicates a closed switching
device.
The Trip Relay operates upon a Trip
command and stays "high" until the
100 ms default time expires. The Close
Relay operates upon a close command
and resets after the 200 ms time
expires.
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