Table 2-1. Sync Acceptor, Controls and Indicators - Continued
Locator
Control or Indicator
Function
2-6
BE1-25A Human-Machine Interface
9146600990 Rev M
E
SETTINGS/READINGS
Chart - Continued
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 reopens 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 instantan-
eous phase angle difference across the open breaker. (This
register performs a monitoring function only.
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.
G
INCREMENT/DECREMENT
Switch
The constants and generators (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, incrementation occurs repeatedly
)
at first
slowly, then much faster. Similarly, when the switch is
depressed, a decrement occurs, 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.
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