Siemens Static Trip III User Manual

lnstallation
and
Adjustments
lnstructions
Long
Time
DelaY
Thelonqtimedelaysetsthetrippingdelayo{thetriounrtbased
on
the
magnitude
of
ti'te'ove'i:u're"nt
condition
The
setting
of
the
long
time
delay
t"r""it
on"
oflive
detay
bands
The
delay
bands
are
inverse
r
t
tu'it'[
i'ntiiont
The
lit
delay
provides
a
selective
long
time
p'ot"Jtion
brecause
the
delay
is
inversely
orooortional
to
the
squaiJoitf-te
magnitude
of
the
overcurrent
:f".iiiii,"
iHl;
;;r.i
tnJtiigt.tlt
ov"ercurrent
conditions
have
shorter
delays
and,
conJers6ly'
lo*"t
overcurrent
conditions
have
longer
delays
rn"jo*&
uul'"t
of
the
selected
band
def
ine
the
minimum
o"r"!
i"iiit"
initiation
of
lhe 9ircull9.r.?:|<,:
il
+i
[i
.,j
"r
n
"
yn"*:
:l;'"
ii
[:
fr'
::,
fl"J]
T J[:
ffi
:["'fi
m?[i
:[ffi;
H%
?..
J'
;;'IJ;
i
""s
t',
"
rr'
"
i
o*e
r
-va
t u
e
or
the
long
time
delav
ouni
illlt"'"nJed
to
3
5
6'
1O
17'
or
30
seconds
at
a
current
"oll".ponJing
to
6
times
the
long
time
cpttino Chanqinq
tn"
f"ong"i-"-t"iting
changes
the
current
i,i
-ilY;Hir.
"
ii*""oit
ivt
aie
rere
re
nced
IIiJHJ
il?#?JXn
,,re
raurt
protection.is
a'
rhermar
Memorv"
f unction.
The
purpose
oiit-'"
If
rt"*al
Memory
function
is
to
;l;;;i
;d;;&,
Flit'tt"nilntermittent
overcrrrent
condition
rhe [unction
mav
be
,"t'i'i"JLv
placlig
ll:
]!:rmal
Memorv
"ilt;;
"#ih;
ittnrot
the
trip
unit
to
the
ln'
position
With
the
function
actlvated'
the
long
time
delay
counter
does
not
immediately
reset
t")"i"
*n"nih"
currentfalls
below
the
i#n'
iil;
ilrirp
uur'"lJntt"'o'
lt
counts
down
at
a
rate
determined
by
tne
magnit'O"Glt't"
remaining
current
When
there
is
a
persistent
i"i"t'it"ti
overcurrent
that
does
not
i"#,i,"
.[;ritime
picXuo
level,
the
delay
counts
are
accu-
mulated.
Tripping
o""'it
;'["nit't"'"""nulatedvalue
reaches
the
selected
long
time;;i';
ln1rt"
tp""iul,case
where
the
current
drops
to
n"u'ry
#Iihe
tong
time
delay
counter
does
reset
to
zero.
Thermal
Memory
protects
against
persistant
intermittant
overcurrents.
Short
Time
Fault
Protection
* , u* ,* s x x s&
Current
in
MultiPles
of
Long
Time
Setting
1
10
o
E
1oo
o
o
o
a
.;
Elt
'l=
delav
band
f-
t i z-sdiono
Example
-
Long
Time
DelaY
Bands
I
Long
Time
DelaY
Settlng
L
ffi
Overcurrent
lntervals
'
ff P61r"3'Cure'l
lnlervals
]
I
I
count
'
oo*''
t'l
,/
$hcri
Time
:),:.,r
Dt;,ir,v
i-,1,^r,U
i
i
11
t't
e8
I
1:l
r
l,'f
Setlrnq
W
-':
,)
rf
l,!-i
riu
12

Siemens Static Trip III Specifications

General

Brand	Siemens
Model	Static Trip III
Category	Circuit breakers
Language	English