Siemens Static Trip III User Manual

lnstallation
and
Adjustments
lnstructions
i
lv
d.Maximum
short time delay is a horizontal lineextendsfromthemaximumvalueoftheshorttimedelay
line along
the
.37-second
time line from the band to .07 seconds, the maximum
interrupting
time.
maximumshorttimepickuptothemaximum Example:
(12+.6)x12A%=24
instantaneous
pickup
l2.The l2t short time ramp delay may be added to the
Time
11.The
maximum instantaneous
pickup
line is a line corre-
Current Curve
by using
previously presented
data, see
sponding to a value that is 20%
greater
than the setting. The Short Time Fault Protection.
Y
Current
in Multiples
of
Long Time
Setting
10
.1
100 1 000
1
0000
1 000
100
o
!,
o
I
ro
a
.;
E
i=
.1
.01
STEP 4
-
Draw minimum-
rong
lme
prcKup
ilne
-I
STEPl-Selectlong
time setting and
lon(
time delay band
,6
=u
Setting
ttttttttt
STEP
10a
-
Draw maximum
long time
p
ckup lrne
Long Tlme
Delay
\\
I
.
STEP
10b
-
Draw
upper
limi
/
ot
long
time delay band
ower
lrmil
ay bandof
iong
time de
STEP
2
-
Selecl
Qhnrt
;6
)r{
pickup p(
;tnt
I
leference
polnt, (7.2x,
10
sec),
for upper
mit of long time delay band
(calculated)
te
)raw
minin
pickup
iinr
l
rand
tum
td,;
Short
Time
Picku
p
Reference
polnt
(6x,
10
sec),
for lower
limit of long time delay band
(given)
ll t t t t ttttt t
STEP 10c
-
Draw maximum short
time
pickup
Iine
I STEP 6
I short tin
--]_rrr
]TEP
5
-
Selecl
;hort
time dela\
I t l t i l|l
STEP 12
-
Draw short tirne l'?t
ramo delav
='th';
STEP 1Oc
short trm(
-
Draw upper limit ol
delav band
sl
ln
Short
lime
Delay
t t|tl
'EP
7
-
Select/Ca
ltantaneous
pick
lcr
up
S-
of
late
line
EP
B
-
Draw lower limlt
short time delay band
STEP1l-I
instantane(
lalculate/i
lus
pickup
)raw
line
maxtmum
2
15
I nstantaneous
Pickup
|| l]ll
SI
inr
'EP
9
-
Draw mrnimum
'
itantaneous
plckup
iine
/laxlmum
nterrupting
tlme
=
.07
111
ttt
ec.
ry
Example Time-Current
Curve
17

Siemens Static Trip III Specifications

General

Brand	Siemens
Model	Static Trip III
Category	Circuit breakers
Language	English