Basler BE1-25/79TR Instruction Manual Download

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BE1-25/79TR Functional Description

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breaker open the relay goes to lockout after the master timer has timed out. At this point the breaker must
be closed manually.

Reset Timers

There are two reset timers available, (RST1 and RST2). Both reset timers have a range of 1-999 seconds.
If the breaker described in the master timer paragraph remains closed for the duration of RST1, then the
RST1 timer will reset and the reset (RST) LED lights. If the breaker described in the master timer paragraph
remains open for the duration of RST2 with live line/live bus and PAR input open (disabled), then the RST2
timer will reset and the reset (RST) LED lights. RST1 timer only times during a closed breaker condition
after the master timer times out and RST2 timer only times during an open breaker condition with live
line/live bus and PAR open after the master timer times out.

Lockout Timer

There is one lockout timer (LO). The lockout timer has a range of 1 to 999 seconds. If the breaker did not
close after the duration of the close pulse, the lockout timer will start timing down. The breaker may close
by the subsequent timing (such as a second line test or restore power), but if not, and the lockout timer
expires, the relay will go to lockout. The lockout (LO) LED will light, indicating an unsuccessful reclose. At
this point the breaker must be closed manually.

Reclose Timers

There are five reclose timers (LT1, LT2, RP1, RP2, and PAR). The reclose timers have a range of 1 to 999
seconds. If the master timer is enabled due to conditions described in the master timer paragraph, all five
reclose timers will start timing down and the associated timing LED's will light. When a reclose timer times
out, the live or dead conditions of the bus and line, status of the breaker, and enable input for that timed out
reclose timer will determine if a reclose output is given.

HSR Timer

There is one high speed timer (HSR). The HSR has a range of 1-999 cycles. When a momentary HSR
input is received, the HSR timer starts timing down in cycles along with the master timer and reclose timers
which count down in seconds. If the breaker is open and no BLK input has been received, a reclose output
will be given.

Sync-Check Timer

There is one sync-check timer (SYNC). The sync timer has a range of 1 to 999 cycles. The sync timer is
enabled when the breaker is open, the line and bus are both live, the difference voltage is less than the

setting, the phase angle is less than the phase window setting, and the slip frequency is less than the FSlip
window setting. The sync timer is completely independent of the reclosing sequence and the master timer.

PF Timer

There is one power fail timer (PF). The power fail timer has a range of 1-99 seconds. If a dead bus and
dead line condition exists, the breaker is closed, and PF input is closed (enabled), the PF timer starts
counting down and the PF timing LED lights. If, when the PF timer time outs, all of the conditions above are
met, the trip output will close to trip the breaker. If the breaker opens, all timing freezes. During this mode,
the reset (RST) LED remains lit if the relay was in reset prior to the above conditions.