Thermal Protection
Technical
Manual:
Smartstart
®
6000
IMI0042
rev
K
Page
39
Starter
Thermal
Protection:
Thermal
protection
of
the
soft
starter
is
provided
by
a
temperature
sensor
located
on
the
heatsink
and
by
calculating
the
temperature
of
the
thyristor
junction
with
sophisticated
modeling
of
the
specific
devices
used.
Fans
are
powered
by
24VDC
supply
and
thermally
controlled
when
the
heatsink
temperature
exceeds
40°C
and
whilst
the
motor
is
ramping.
Motor
thermal
Protection
The
Smartstart
®
6000
provides
thermal
protection
of
the
motor
by
providing
a
thermistor
input
and
also
a
programmable
motor
overload
protection
feature.
The
starter
continuously
monitors
the
current
and
calculates
the
temperature
rise
of
the
motor
based
on
the
motor
data
provided.
The
standard
IEC60947
‐
4
‐
2
defines
the
protection
classes
giving
the
starting
capacities
of
the
motor
(warm
or
cold)
without
thermal
trips.
The
thermal
protection
displayed
by
the
starter
corresponds
to
the
thermal
time
constant:
An
overload
trip
will
occur
and
stop
the
motor,
if
the
motor
exceeds
the
critical
temperature
rise
threshold
of
125%
This
feature
has
a
memory
function
based
on
the
thermal
capacity
and
may
not
allow
a
start
if
the
temperature
rise
is
too
high.
The
thermal
state
continues
to
calculate
even
when
the
starter
is
off
and
powered
down.
Simply
by
turning
power
off
and
back
on
will
not
reset
the
thermal
state.
Motor
thermistor
Protection
The
Smartstart
®
6000
provides
an
input
for
a
thermistor
or
normally
closed
switch.
Thermistor
/
PTC
probes
integrated
in
the
motor
to
measure
its
temperature
can
be
connected
to
the
thermistor
input
terminals.
This
input
has
a
trip
resistance
of
3000ohms
and
a
resistance
of
20ohms
or
less
will
be
detected
as
a
short
circuit.
Alternatively,
a
normally
closed
thermal
switch
may
be
used
which
open
circuits
at
a
specific
temperature.
Motor
thermal
Protection:
Cold Curves
Hot Curves
SS6000 Motor Thermal Overload Curves - Cold
1.000
10.000
100.000
1000.000
10000.000
0
1
2
3
4
5
6
7
8
X FLC
Tr
ip
Ti
me
(s
)
Class 30 Cold
Class 20 Cold
Class 10 Cold
Class 10A Cold
Class 2 Cold
SS6000 Motor Thermal Overload Curves - Warm
0.100
1.000
10.000
100.000
1000.000
0
1
2
3
4
5
6
7
8
X FLC
Tr
ip
Ti
m
e
(s
)
Class 30 Warm
Class 20 Warm
Class 10 Warm
Class 10A Warm
Class 2 Warm
Содержание SMARTSTART 6000
Страница 1: ...ZENER VARIDRIVE SOLUTIONS ZENER SMARTSTART 6000 Soft Starter Instruction Manual...
Страница 2: ......
Страница 49: ...Appendix B Application Diagrams Technical Manual Smartstart 6000 IMI0042 rev K Page 46 General Purpose...
Страница 51: ...Appendix B Application Diagrams Technical Manual Smartstart 6000 IMI0042 rev K Page 48 Irrigation Pump...
