Siemens Static Trip III User Manual

:-
Testing
The illumination
on the
pickup
LED indicates
thatthe
time
delay
has started.
The timing
circuit
does
not
have
the
time
lag
evident
in the
pickup
indication,
When the
"Thermal
Memory"
switch
is
"Out,"
the
Long
Time elements
will
be cleared
each
time
the
LED
goes
out;
if the
"Thermal
Memory"
switch
is
"1n,"
the
device
will accumulate
the
overload
times
and
will treat
a
series
of
short
overloads
as
if it were
one
interval.
While
the
overload
is below
the
current
setting
the
tlme
register
slowly
resets, so
that
if the
periods
between
overloads
are
long
enough
the
device
will not
triP.
Short
Time
PickuP
Test
Set
Long
Time
Current
Setting
on
.5 and Short
Time
Pickup
on
2
Move-the
switch
above
the
LED
timer
readout
on
the
PTS-4
to
"All
Other
Tests"
and
selectthe
phase
to be
tested.
Raise
the
current
slowly
until
the Short
Time/Ground
Pickup
LED.is
illuminated.
This should
be between
.50
and
.60 amperes
(or
the
setting
value
and
120%
of the
setting
value)
as
shown
in
Table
2. Repeat
for other
Short
Time settings
as
desired
Note
thatthe
circuit
breaker
maytrip
(or
PTS4test
setmay
sense
trip
signal
and shut
off
power)
very
quickly
after
the
pick
up
light
comes
on.
Note:
Do not allow
currents
above
one
ampere
to continue
for
more
than a
minute
at
a time
to avoid
overheating
the
trip
device,
A circuit
breaker
is
provided in the
PTS4
test
set
to
prevent
thermal
damage
from
repeated
high
current
tests'
Table2
Short
Time
Secondary
Pickup Currents
(Long
Time Current
Setting
on
.5)
Select
the
phase
to be
tested.
Move
the
switch
above
the
LED
timer
readout
on
the
PTS4
to
"All
Other
Tests".
Set
the
Instan-
taneous
on
2,
increase
the
current
slowly
until
the
breaker
trips
and/or
the
PTS4 test
set
timer
stops.
This should
occur
be-
tween
I .O and
1
.2 amperes,
as shown
in
Table
3
Test
the other
pickup
settings
as
desired.
See
Table
3
for
calibrated
pickup
values.
Table 3
lnstantaneous
Secondary
Pickup Currentso
O Note
on earl
er
model
trip units
wlth
ight
grey facepate,
the
tolerance
for
instantaneous
pickup
was
tlO%
rather
lhan
+20%l-O%
for
current
pro-
duction
units.
Ground
PickuP
Test
Select
Static
Tiip
lll
ground
test
on
the
PTS4.
Move
the
switch
above
the
LED
timerreadout
on the
PTS4
to
"All
Other
Tests"'
Observe
the
Short
Time/Ground
Pickup
LED
This
is the
same
LED that
indicates
Short
Time
pickup. The
ground
settings
are
shown
in
Table
4
with their
associated
test
limits.
Table
4
Ground
Fault
Secondary
PickuP
Currents
Short
Time
Pickup
2
3
4
5 6
7
8 12
Secondary
Amperes
Nl rn 50
75
1.00
\ .lc 1.50
175 2.AO 300
Max
hU 90
1.20 1.50
1.80
2.14
2.40 3.60
Due to
the
low
values
of current
the
trip
device
may
not trip
the
circuit
breaker
when
tested
with
secondary
current
into the
ground
circuit
only.
lt
may be
necessary
to
supply
some
phase
6urrent
in order
to
have
suff
icient
power
to
release
the
tripping
actuator,
The PTS4test
set
provides
thisf
unction
automatically'
Long
Time
Delay
Test
UseIhe
high
range
ammeter
setting
on
the
PTS4
test set
l.
Move
th6
switch
above
the
timer
LED
readout
on
the
PTS4
to
"static
Trip
lll
Long
Time"
and
select
the
phase
to
be
tested.
2, Close
the
switch
and
set
the
current
to
the
desired
value'
3. Open
the
switch
(and
close
the
circuit
breaker)
4.
Without
changing
the
setting
of the
current
source,
close
the
switch
and
measure
the time
untilthe
breaker
opens
or
PTS4
relay
stops
timing.
Compare
the
results
to the
time current
curves,
(see
curves
in lnstallation
and
Adjustment
lnstruc-
tion,
page
12).
Example:
Set
Long
Time
Current
Setting
on
.5,
Long
Time
Delay
on
17.
Input
current
at
1
5
amperes
(6-times
25) Set
Shori
Time
Band
and
lnstantaneous
on
I2x.
The
timed
inter-
val should
be
between
17 and
25 seconds.
lnstantaneous
TriP
Test
Pickup
for
the
Instantaneous
element
is demonstrated
by
tripping
of
the circuit
breaker
or
operation
of the
targets
and
reiay
in the
portable
test
set
since
immediate
trip
will be
executed.
lnstantaneous
is
calibrated
in multiples
of 0
5 ampere.
Unlike
the Short
Time
Pickup
it
is not effected
by the
current
setting
of
the
Long
Time
element.
Note:
Do
not allow
currents
above
one ampere
to
f low
for more
than
a
minute,
to avoid
overheating
the trip
device.
A circuit
breaker
is
provided
in the
PTS4
test
set
to
prevent
thermal
damage
from
repeated
high
current
tests,
At higher
settings
some
of
the other
circuits
may
time
out
while the
current
is
being
raised to
the
instantaneous
level.
This
can
be
minimized
Oy s6tting
the
Long
Time Current
and
Delay
and Short
Time
Pickup
on
their
maximum
settings.
On
devices
with Targets
the
Short
Circuit
target
should
operate
when
the device
operates
on
its
lnstantaneous
or Short
Time
element.
lnstantaneous
Pickup
2
4
6
I
12 15
Secondary
Amperes
1\,4 i n 10 2.0
30
4.0 6.0
75
N,4ax
12
2.4
J,O
4.8
72
9.0
Ground
Faull
Pickuo
20 30
40 50
60
Secondary
Amperes
N,4 n
09
.135
18
225
27
Max
11
165
.22
275
.33
30

Siemens Static Trip III Specifications

General

Brand	Siemens
Model	Static Trip III
Category	Circuit breakers
Language	English