='l-
Breaker
Display
Unit
Alarm
Log
Cause and Parameters Displayed
Alarm
Cause
Message
Associated
Measured
Parameters
Overcurrent
Over
Ground Current
Over Neutral
Current
Current Unbaiance
OVER I
OVER lg
OVER In
I UNBAL
la,
lO, lc, and il
option
present
lg, ln
Communications
Command
REIV]OTE
OPENED or
CLOSED
Over Voltage
Undervoltage
Voltage
Unbalance
OVER
V
UNDER
V
V UNBAL
Vab, VOc,
Vca, V*;i:
Reverse Power
Over Power
FEVRS
KW
OVER KW
Over kW Demand
OVER KWT)
KWD
Over
kVA
OVER KVA
Over
kVAR
OVEB KQ KQ
Over/Under PF
PWR FCTR
PF
Over Frequency
Under Frequency
OVER
Hz
UNDER
Hz
Hz
Trip
Log Cause
and
Parameters Displayed
Trip
Cause Message
Associated
Measured
Parameters
Overload
Short
Time
I nstantaneous
Ground
Fault
OVERLOAD
SHORT
SHORT
GROUND
la.
lb, lc,
and
if
option
present
lg, ln
Shadow SHADOW
Current Unbalance- I UNBAL
Communications Command REMOTE
Over Voltage*
Under
Voltage.
Vo
tage Unbalance-
OVER V
UNDER V
V
UNBAL
Vab, Vbc
VCa, V*)K
Reverse Power*
REVRS KW KW, KVA.
KQ
Over
Frequency.
Under
Frequency
OVER Hz
UNDER Hz
Hz,
Vab, Vbc
Vca, Vx*
lf the BDU is
connected
to the trip unit when
the alarm
relay
is
activated,
the event ls immediately
displayed. The
"ALRM
LOG"
flashes
on and off
several times at 1-second intervals.
The BDU
then
automatically starts
displaying the cause and
associated
measured
parameters.
This
sequence of flashing
ALRN4 LOG
and displaying
alarm log values continues
until
any key
is
pressed,
returning
the
display to manual control.
Note
that the alarm log has
not been erased when returning
to
manual
control and can
again be read by manually scrolling
to
the
"ALRM
LOG"
window
Reading
the Trip Log
-
From
the
"TRIP
LOG" window,
the
most recent
trip log
event can be read
by
pressing
Read to
display
the cause of the trip, followed
by Read
(or
Down) to
display the
associated measured
parameters,
The display will
return
to the
"fRlP
LOG" window
when the Read
(or
Down) key
is
pressed
after the last
parameter
is
displayed, Pressing
Down
or Up f rom
the
'TRIP
LOG" window
scrolls the display to
the
next
window in
the sequence. The
cause and associated
measured
parameters
displayed are
given
in
the
following
table, The message
"No
Log" will
be displayed if there is no
tripping information
available from the trip
unit.
Read
Read
Read
(or
Down)
Reading
the Trip Log
Note:
'
indicates
"X'
option tripping functions
lf
the BDU is connected
to the trip unit
when
the circuit
breaker
is
tripped, the event is immediately displayed, The
"TRIP
LOG
flasheson
and off severaltimesat 1-second intervals.
The BDU
then automatically
starts displaying the cause and associated
measured
parameters.
This
sequence of
f lashing
"TRIP
LOG"
and displaying alarm log values
continues
until the circuit
breaker is
closed or until any key is
pressed.
Closing the circuit
breaker restarts
the automatic data scrolling through the
real-
time measured values;
pressing
a
key returns the display to
manual
control. Note that the trip log automatic
flashing
se-
quence
takes
priority
over the alarm
log
automatic sequence.
Program Mode
-
The
set-points
for
the alarms,
thresholds,
and delays are set in the
program
mode. They are
protected
with
a
password
to
prevent
unauthorized changes.
The
password
is not required
to
view
the configuration and set-
points.
There is no automatic scrolling sequence in the
pro-
gram
mode. However,
if no key has been
pressed
for five
minutes, the display will revert
to
Data mode
and start
its auto
scrolling of
real-time
metered values,
Entering
the
Password
-
After entering the
program
mode
and moving
down
(or
up)
in
the scrolling sequence, the
'PASSWORD"
message is displayed. If the Down
(or
Up) key
is
pressed
again, the display moves to the next message
in
the
main scrolling
sequence, but the configuration
parameters
and set-points cannot be
changed; they can only
be viewed.
lf
the
Enter
(or
Read) key is
pressed,
the four-digit
password
may be
entered.
This will
allow the user to view and change the
conf iguration
and set-points.
The
password
is entered starting with the right-most digit,
Flashing
acts as a cursor to indicate the active digit
(this
manual will use an underline
symbol to signify the digit
which
would
be
flashing). The
Up and Down keys are used to scroll
the numbers from
0 through 9. When the correct digit is
displayed,
pressing
the
Enter key
enters the
number
and
indexes the cursor
to the
next left
digit.
The
digits
not
being
activated are displayed as X's, Afterthe last digit is entered, the
word
"Correct"
or
"lncorrect"
will be brief ly displayed.
The
BDU
38
To Next Page
Loading...
