Basler Electric BE1-25A - Manual (Page 24)

Figure 2-3. Proportional Correction Pulses
4 (MAX SLIP). The number in this register represents the maximum slip rate that is acceptable for
closure of any breaker that is under the supervision of the Sync Acceptor Relay. When the slip rate
exceeds this setting, the sync acceptor closure output is inhibited. The maximum slip limit is adjustable
over the range of 0.01 to 0.500 Hz in 0.001 Hz increments.
5 (GEN. UV). The number in this register represents the minimum voltage output that the generator
must have before an operator breaker closure attempt is enabled. This value is adjustable over the
range of 40 to 110 Vac in 1.0 volt increments. If the generator voltage is below this setting, voltage
correction pulses are inhibited.
6 (LOCKOUT ON/OFF). This register indicates whether or not the lockout feature is enabled. When
enabled, the BE1-25A relay will automatically enter LOCKOUT whenever the breaker re-opens within
15 seconds after closure by the synchronizer. This prevents another closure of the breaker from this
source until LOCKOUT is terminated by (1) manually resetting the unit, using either the front panel
RESET control or an external (remote) contact; or (2) by removing, then reapplying power.
The READINGS registers are:
A (ADVANCE ANGLE). This represents the number of degrees that the breaker closure signal must
precede actual closure so that the latter will occur at, or close to, a phase difference of zero degrees.
This compensation takes into consideration the operating speed of the breaker, as well as the armature
operation time of the output relay. (This register performs a monitoring function only. No provision for
adjusting the data.)
b (BUS VOLTS). A digital voltmeter with a range of 0 to 135 Vac that reads the bus voltage. (This
register performs a monitoring function only. No provision for adjusting the data.)
C (GEN VOLTS). A digital voltmeter with a range of 0 to 135 Vac that reads the output voltage of the
generator being addressed. (This register performs a monitoring function only. No provision for
adjusting the data.)
d (ACTIVE BREAKER). Displays an identifying digit (1 through 6) that represents the particular
breaker whose operating time, b-contact, closing circuit, and associated generator voltage is being
addressed by the BE1-25A relay. (In some situations, this number can represent a group of breakers
having an identical operating time.)
P (SYNC ANGLE). This variable indicates the instantaneous phase angle difference across the open
breaker. (This register performs a monitoring function only.)
Locator F - Five-Digit , 7-Segment Display
The leftmost digit indicates the function selected, while the remaining four digits indicate the present
value held in memory for that function.
Locator G - INCREMENT/DECREMENT Switch
The constants and generator (SETTINGS) that may be viewed in Display E (but not the READINGS,
such as bus voltage, etc.) may be altered in value by means of this switch. When the switch is raised
for approximately one-half second and released, the number on the display is incremented. But when
held raised, the number on the display is incremented repeatedly
− at first slowly, then much faster.
Similarly, when the switch is depressed, a decrement occurs, and then repeats slowly, then faster
− as
long as the switch is held down.
The switch is spring loaded to return to the center position from both directions.
Locator H - LOCKOUT LED
This LED lights to indicate the occurrence of a lockout condition. During lockout, the output of the relay
is inhibited from signaling the breaker to close. Lockout may be cleared by the front panel RESET
switch, by a (continued) remotely located contact, or by powering down and then powering up.
Locator I - RESET Switch
When momentarily raised, this switch restores the relay to operation after a lockout has occurred.
This switch is also used to return to the READING registers after changing settings.
Locator J - SIG (Signal)/COM (Common) Test Points
2-4 BE1-25A Human-Machine Interface 9146600990 Rev S