Siemens Static Trip III User Manual

I
nstallation
and Adjustments
lnstructions
v
v
Long
Time
Setting
The long
time
setting
establishes
the maximum
current level
at
which
the circuit
breaker
will
continuously
operate
without
initiating
a
tripping
sequence,
With
the setting
switch,
the
continuous
operating
current level
may
be set
to S .55,
6 65
.7,
.75,
8, .85 .9
95
or 1.0 times
the
current sensor
rating.
The
variance
in
the tripping
sequence
pickup
due
to electronrc
components
tolerances
is less
than 10%
The
trip
units are
designed
to
accommodate
this variance.
The
pickup
is
au-
tomatically
set
by the trip
unit to
a
value
that is
10%
greater
than
the
switch
setting. Therefore,
the
actual
pickup
value will
be
between
the
switch
setting
and a value
207"
grealer
than
the
switch
settings.
This
ensures
that the
circuit
breaker will
operate
continuously
at
a current
corresponding
to
the switch
setting.
On a Siemens
Type
RL circuit
breaker,
the
current sensor
rat-
ing is
given
on the
circuil
breaker rating
label located
directly
above
the trip
unit, A
similar
sensor rating
label
should be
found
when retrofit
to other
manufacturer's
circuit breakers.
Long Time
Fault
Protection
i nrrn
J'rnrr:
LV''\-f
r rr l
i\/
!;i-r!rrr
r\,{
"
.,
,.-.,
A ll
i-)
ai
xS*n$or
WsO6xSetting
Current in Multiples
of Sensor Rating
.2
3 .4
.5 .6 .7.8.9
l
1
0000
9000
8000
7000
6000
5000
Long
time setting
set at .B
_
Long
time
pickup
will
be
between
.B and .96
times
the sensor
rating.
o
t,
E
4000
o
q)
a
.=
3000
0)
E
F
2000
I 000
Example
Long Time Pickup
Crrcu
i
Breaker
Bating
Label
Y
11

Siemens Static Trip III Specifications

General

Brand	Siemens
Model	Static Trip III
Category	Circuit breakers
Language	English