Siemens Static Trip III User Manual

lnstallation
and
Adjustments
lnstructions
A switch
on
the
f ront
of
trip
units
with
short
time
fault
protection
;l;;;
fotth;."lection
of
an
inverse
l'zt
ramp
function
shorttime
O"iry.
f
"
iome
applications
the
l2t
delay
allows
for
better
co-
orOi,iation
with
downstream
circuit
breakers
and
fuses
The
f o*e,
uuf
r"
of the
l'?t
delay
band
is
preset to
a
calibrated
value
of
.5
seconds
at
a
current
corresponding
to
6 times
the
long
r;;
;;tti.g
Changing
the
long
time
setting
changes
the
"'rt*"i
ut"*f,icn
t6e
"time
delay
is
referenced'
At
higher
"rrt"ntt
the
l'?t
delay
reverts
to
a
fixed
delay
at the
value
selected
with
the
short
time
delay
switch'
Current
in
MultiPles
of
Long
Time
Setting
10
o
E
o
o
c)
a
'6
E
Example
-
Short
Time
Delay
Bands
with
l'?t
ramp
delay
lnstantaneous
Fault
Protection
lnstantan00us
Fickup
s
4
2
x Sensor
lnstantaneous
PickuP
il;l;;##-ous
pltt<up sets
the
level
of
hish
current
at
*r.li"f,l
li*
ttlp
unit
will
irip
the
circuit
breaker
without
an
,i""tl""J
tinie
Jerav.
Non-delayed
tripping'
in
response
to
a
i"u"r"
overcurrent
condition,
mlnimizes
potential
damage
to
"i""ttLri
tv.tems
and
equipment
The
instantaneous
pickup
,ru
O"
i"tioZ,
4. 6.
8.
12,'or
15timesthecurrentsensor
rating'
The
pickup is
independent
of
the
long
time
settlng'
The
tolerance
on
the
instantaneous
pickup
is
plus 20%/
minus
0%.
Current
in
MultiPles
of
Current
Sensor
Rating
10
o
t,
10
c
o
o
o
a
.;
E,
F
-9
.1
o
o
I
.01
Long
Time
(or
Short
Time)
delay
band
I
nstantaneous
Pickup
set
at
6.
lnstantaneous
Pick
will
be
between
6
0
and
7
.2 times
the
current
sensor
rating
Example
-
lnstantaneous
PickuP
14

Siemens Static Trip III Specifications

General

Brand	Siemens
Model	Static Trip III
Category	Circuit breakers
Language	English