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1)
X axis stands
for voltage of
controlling
signal and Y
axis stands for
the ratio of
output voltage
and input
voltage in main
circuit.
2)
the above four
curves are for
those full
controlled
modules with
digital circuit
and resistance
load.
3)
for half
controlled
module and
inductance load,
their
controlling
curves have a
little
difference from
above because of
their different
controlling
method and
different load
characteristics.
4)
this drawing is
just for your
reference.
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Protection
f module
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(1) |
Over
Current
Protection |
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Fast fuse, fast
over current
relay and sensor
can be connected
externally to
protect module.
Fast fuse is
most common way.
Please listen to
following
introduction.
1)
connection: fast
fuse is
connected at the
input side of
modules. Take
three-phase
rectifier module
and single-phase
AC module for
example, please
refer to
Fig.14~15.
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(2) |
Select
of fast fuse |
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Rated voltage of
fuse should be
higher than
working voltage
in circuit in
normal
conditions.
Rated current of
fuse should be
selected in
reference to
Table 10~11.
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| Model
of module |
|
Fuse |
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Rated
current (A) |
Quantity
(pcs) |
Rated
current (~V) |
| MSD-500 |
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| MSA-350 |
250 |
3 |
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| MSD-400 |
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| MSD-300 |
160 |
3 |
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| MQA-300 |
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| MSA-300 |
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| MSA-260 |
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| MSD-200 |
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| MQD-200 |
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| MSA-150 |
80 |
3 |
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| MQA-150 |
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| MQD-150 |
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| MSA-100 |
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| MQA-100 |
60 |
3 |
500 |
| MQD-100 |
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| MSD-100 |
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| MQA-75 |
40 |
3 |
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| MSA-75 |
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| MSD-50 |
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| MQD-50 |
25 |
3 |
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| MSA-40 |
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| MQA-40 |
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| MQD30 |
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| MSD-30 |
16 |
3 |
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| MSA-20 |
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Model
of modules fuse,
rated current
(A), quantity (pcs),
rated voltage
(~V) |
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Over
Voltage Protection
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(1) |
Over
Current
Protection |
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For
the over voltage
protection, we
highly recommend
capacitive
resistance and
thermistor to
you.
capacitive
resistance
absorbing
circuit
Capacitor
turns the
electromagnetic
energy of over
voltage to
static energy
and then stores.
It avoids
producing
syntony. This
kind of absorbed
circuit can
restrain the
produced over
voltage during
the whole
process and
avoid
penetrating
thyristors.
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Select
capacitive
resistance
component |
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|
Item |
Model
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R (W/W)
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C(Ìf)630VAC
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Quantity
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V |
A |
mA |
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MSD-500 |
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MSD-400 |
8.2/15 |
0.68 |
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MSD-300 |
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| Three
phase |
MSD-200 |
20/10 |
0.33 |
6pcs
for |
| bridge
rectifier |
MSD-150 |
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each |
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MSD-100 |
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MSD-50 |
33/5 |
0.22 |
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MSD-30 |
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MSA-350 |
62/5 |
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MSA-300 |
8.2/15 |
0.68 |
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MSA-260 |
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| Three
phase AC |
MSA-150 |
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MSA-100 |
20/10 |
0.33 |
3pcs
for |
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MSA-75 |
33/5 |
0.22 |
each |
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MSA-40 |
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MSA-20 |
62/5 |
0.22 |
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MQD-200 |
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| Single
phase |
MQD-150 |
20/10 |
0.33 |
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| bridge
rectifier |
MQD-100 |
33/5 |
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MQD-50 |
|
0.22 |
4pcs
for |
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MQD30 |
62/5 |
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each |
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MQA-300 |
8.2/15 |
0.68 |
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MQA-150 |
20/10 |
0.33 |
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| Three
phase AC |
MQA-100 |
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1pcs
for |
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MQA-75 |
33/5 |
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each |
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MQA-40 |
62/5 |
0.22 |
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Protection
Of module
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In
the table, R and
C are applicable
for resistance
load or
inductance load.
When users use
it for
capacitive load,
R and C are
selected as
below.
Capacitance C:
same
capacitance,
withstanding
voltage
increases 1.5
times.
Resistance R:
same resistance |
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Thermistor
Absorbs over
Voltage. |
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thermistor
absorbs big
power and
lasting over
voltage produced
by lightning
strike. Marked
voltage of
thermistor (V1mA
) means voltage
of two side when
thermistor
passes 1ma.
Voltage of
thermistor
should be
selected
710V=V1mA=1000V.
The connection
refers to
Fig.23~24. |
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Over
Heat Protection |
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The
condition of
heating
radiation
relates greatly
to the operation
of modules. A
good heat
radiation not
only can
guarantee safe
operation for
module and avoid
burning but also
can improve
output current
of modules. If
users use high
power modules,
we sincerely
suggest you
choose those
modules with
over heat
protection. Even
over heat
protection is
available, heat
sink and fan are
also necessary. |
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