Basler Electric BE1-79M - Manual (Page 35)

9170100990 Rev N BE1-79M Functional Description 3-11
Control Outputs and Special Contact Assignments
Control output contacts and special contact assignments are options controlled by software. The functions
of these contacts are as follows:
• I.T.E. Cold Load, Normally Open Option
•
- The instantaneous trip enable output will remain open
in the LOCKOUT condition. Thus, when a breaker is manually closed from LOCKOUT, the output
will be open until the relay goes to reset. The normal I.T.E. option (NOT I.T.E. cold load) has the
instantaneous trip enable output closed immediately after the breaker is manually closed.
Pre-lockout Alarm Output, Normally Open Option
•
- The pre-lockout alarm output will close imme-
diately whenever the relay is attempting the last programmed reclose attempt. This output is
mutually exclusive with the pilot reclose output. This output will remain closed until the relay
reaches RESET.
Reset Inhibit Input Option
•
- A closed reset inhibit input inhibits the reset timer from timing and
lights the RESET INHIBIT LED. When the input contact opens, the reset timer continues timing
from the point of interruption and the RESET INHIBIT LED extinguishes. The reset inhibit input is
mutually exclusive with the pilot initiate input, and the RESET INHIBIT LED is mutually exclusive
with the PILOT LED.
Reclose Wait Input Option
•
- A closed reclose wait input inhibits all timers from timing. All output
contacts remain in the previous state, unless the reclose or pilot outputs are energized prior to the
input closing. If the reclose or pilot outputs are energized when reclose wait is closed, the outputs
will open. When reclose wait input opens, reclosing will continue in the sequence to the next time
delay or LOCKOUT. The reclose wait input replaces the reclose initiate input and RI is not re-
quired to initiate the reclosing sequence. Closing the 52b input initiates the reclosing sequence.
Reclose Permissive Input Option
A full reclose sequence (one instantaneous, followed by up to three time reclosures is enabled when the
reclose permissive contact is closed and the 52b input contact is closed. The reclose initiate input is
replaced by the reclose permissive input.
- An open reclose permissive contact inhibits all front-panel-
controlled delay timers and manual STATUS LED reset. The RESET LED flashes during this
condition. An energized reclose or pilot output is de-energized when the reclose permissive con-
tact opens. When the reclose permissive input contact closes, reclosing continues in the
sequence to the next time delay or LOCKOUT.
IRB and PI are latching inputs with this option. IRB and PI latch if closed when 52b input is closed and
reclose permissive input contact is open. A reclose permissive input is required for a reclose sequence.
Reclosing Event Memory
Purpose
In the normal service mode, the reclosing event memory (REM) increments software counters to record
significant events of the reclosing sequence. When the relay is reset, the accumulated data is transferred
to and stored in a nonvolatile memory. The data is retained even though power is lost. Only data accumu-
lated prior to the last reset is retained in the non-volatile memory. If the relay loses power during a
reclosing sequence, the data accumulated during this uncompleted sequence will not be saved.
The REM counts and stores the cumulative number of attempts made in the following categories.
• Instantaneous reclosures
• First time-delayed reclosures
• Second time-delayed reclosures
• Third time-delayed reclosures
• Pilot reclosures
• Unsuccessful reclosures
Maximum count is 999 attempts per event type. Drive-to-Lockout events are not counted. REM is not
affected when the relay is in the test mode or by the position of the logic switch, S23, (reclose sequence
memory save enable).