Siemens Static Trip III User Manual

7a
Breaker
Display
Unit
TRIP
SET
TRIP:YES
O Pressing any
other
key
than
Enter will
abort changes and automati-
cally advance to the next configuration window.
Changing the Trip
Settings
(Example
shows changing
I
UNBAL
delay
from l0 to B seconds).
Clearing
Min/Max
and
kwhr/kVARhr
Values
-
The m i
n
i
m
um/
maximum values for all real-time
measured
parameters
and
the accumulated kilowatt and
kilovar hours can be cleared
after entering the
correct
password.
To
clear
min/max values,
use the Up
or Down keys to scroll through
the main
program
sequence to the
"CLR
Mn/Mx" window and
press
Enter. The
message
"Enter?"
will
appear
requesting confirmation.
Press-
ing Enter again will reset the min/max
log in the trip unit's
non-
volatile memory to the
present
values of each
reallime
measured
parameter,
and the
message
"Executed"
will be
briefly displayed before
returning to the
"CLR
Mn/Mx" window.
Pressing
any other
key will abort clearing of the
min/max log
and
return
to the
"CLR
Mn/Mx" window after a
brief
"Canceled"
message is displayed. Resetting the
kilowatt hour and
kilovar
hour registers to zero
is
accomplished
from the CLR
kWh'
window in
the same
way. Note that
no
action
can be taken
from
these two
program
windows unless the correct
password
has
been entered.
LED Display
Brightness
Control
-
The
LED
display
bright-
ness has
been selected
to meet a
wide variety of ambient
lighting conditions, and should
not require adjustment.
The
LED brightness can be changed,
however, to meet extreme
lighting conditions
if required. To vary the brightness,
select
the
"DIMMER"
window in the main
program
sequence
and
press
Read
to display
the
preset
setting; shown
as
"Bright=2".
lf the
password
has been entered,
the
Up
and Down
keys
can be used to select brightness
from 0
(brightest)
to
6
(dimmest).
The LED
brightness
will immediately
change as
different
numbers are selected. When the
desired bright-
ness is found,
press
Enter to
return to the
'DIMMER"
window.
Note
that the
new
brightness
number
is
stored
in active
memory in the BDU and will automatically
return to the default
value of 2 if control
power
is lost momentarily.
BDU Self-Test
Function
-
The BDU has a selttesting
feature
which
allows
the
operator
to check
for
proper
operation of all
pixels (or
dots) in the LED display,
read the version
numbers
of the BDU and trip unit software,
and read the catalog
suffix
number
of
the trip unit to indicate the
metering and
protective
relaying function options
which
are
installed,
The
self-test
function can also be used to
reset the BDU
microprocessor
in
the unlikely event of a
program
execution error.
The
self-test
function is activated from anywindow
by
pressing
the Up and Down keys at the same
time and then
holding them
down as the display automatically
scrolls through
"Test?"
followed bythe LED
pixel
check
"::i::ri:i::il:l::::ir".
Releasing the
keys
will allow an automatic scroll
indicating BDU RAM
memory
pass
or
fail BDU ROM memory
pass
or fail, the
BDU software
version number
(shown
as
"BDU:2.10)
followed by an indica-
tion of the
installed metering and
protection
options and trip
unit software version number
(shown
as
"CNPX
2.24") and an
automatic
return
to the top of the
data mode sequence.
42

Siemens Static Trip III Specifications

General

Brand	Siemens
Model	Static Trip III
Category	Circuit breakers
Language	English