Basler Electric BE1-BPR - Manual (Page 31)

9272000990 Rev J BE1-BPR Application 2-7
increments. Each of the reclosing timers may be disabled by a setting of zero. When a reclosing timer set
at zero is reached in the reclosing sequence, the reclosing sequence is interrupted and the relay will enter
lockout.
Reset timer (TD79R) begins timing out when the RESET logic becomes TRUE (breaker closes). The
reset timer is reset when the breaker trips. If the reset timer times out while the breaker is closed, the
recloser goes to RESET.
If enabled, the reclose fail timer (TD79F) starts whenever a reclose output is given and stops when the
RESET logic indicates the breaker has closed. If the reclose fail timer times out before the RESET logic
becomes TRUE, the recloser sets the reclose fail diagnostic flag. The reclose fail diagnostic flag can be
inhibited by setting the time delay to zero. The reclose fail function can be inhibited by setting the
reclosing mode (TYPE) in the LR command to zero (0).
If the total reclosing time between reset states exceeds the maximum reclose cycle timer (TD79M) setting
(excluding time while in the WAIT state), the recloser goes to the lockout state. The maximum reclose
cycle timer can be inhibited by setting the time delay to zero.
Output Contacts
Each BE1-BPR relay has five isolated normally open (NO) output contacts (OUT1-OUT5) plus one
isolated normally closed (NC) alarm output (ALM). Output contact OUT1 is a high speed contact with a
maximum operating time of ¼ cycle. By using the PTARGET command, output relays can be
programmed to latch target data into memory.
Output contacts OUT1 through OUT5 are controlled by the status of the internal logic of signals O1
through O5. If O[n] becomes TRUE, then the corresponding output relay is energized and closes the
normally open contacts. If the PHOLD feature is enabled, the output contacts are held in an energized
state for 200 to 250 milliseconds when O[n] becomes TRUE. Each output contact then resumes following
the internal logic. The PHOLD function ensures that the TRIP output doesn’t interrupt the trip coil current
but allows the trip coil current to be interrupted by the 52A contact. Section 4, Functional Description,
provides more information about the PHOLD command.
All output contacts are factory set to NO. However, OUT1 - OUT4 may be changed to NC by changing a
soldered jumper next to the output relays on the printed circuit board. NO contacts are typically used in
trip circuits and using this type of contact allows the relay electronics to be drawn out without activating
the trip logic. If a NC contact is desired, such as for a block reclose signal, then external shorting switches
or a low cost auxiliary relay with NC contacts should be used to allow the electronics to be drawn out.
The ALARM output is a NC contact that is energized to provide a NO signal during normal operation. If
the relay fails or an internal diagnostic signals that an alarm condition exists, the ALARM output de-
energizes and closes the output contacts to signal an alarm condition. If the electronics are drawn out of
the case, the ALARM output also opens.
Trip Circuit Monitor Logic
Logic for monitoring the trip circuit and alarming for loss of voltage (open fuse) or loss of continuity (open
trip coil) is provided in the preprogrammed breaker fail schemes. Figure 2-8 shows input 2 (I2) being used
as a trip circuit monitor (TCM) sensing element. It is placed in parallel with the retrip output of the relay.
Figure 2-9 shows a diagram of the logic. If the breaker has multiple trip circuits, an additional input can be
used for TCM sensing with trip circuit 2. For example, if the trip circuit 2 TCM input were input 3 (I3), the
expression for virtual output 6 (O6) would be changed to /I1∗/I2+/I1∗/I3.