S/CLP/SIM865770/B/21/04/2004
®
celpac
page 3 / 4/GB
Thermal specifications .
Current according ambient temperature :
Ø
The curve "1" gives the limits of the product.
4 5
4 0
3 5
3 0
2 5
2 0
1 5
1 0
5
The temperature reached are acceptable for the com-
ponents. These values are in compliance with most of
SSRs manufacturers.
In a cabinet with a minimum of ventilation or a non
permanent current, these values are correct.
1
Ø
The curve "2" gives the limits of the product
according to EN60947-4-3 with a maximum rise
temperature of 50°C (@40°C) for a permanent
working and in air calm ( test during 8 hours).
2
Ø
For a non permanent current, you can calcule
the average power = Pd x duty cycle and check the
rise temperature : Tj = Pd x Rthj/a (Pd and Rthj/a are
given page 2)). The junction temperature must not
exceed 125°C at the maximum ambient temperature.
The maximum current is limited to the size of the
thyristors = 50A.
0
0
5
1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5 8 0 8 5
Tambient (°C)
Ø
The thermal constant (Cth) of the product is 9
minutes. That means the rise temperature is only 63%
of the stabilized temperature after a running time of
9 minutes.
fig 2
Surge current : Itsm (Apeak) = f(t) for 50A models with Itsm =550A
Fig.3
Overload current .
1 - No repetitive Itsm is given without voltage
reapplied . This curve is used for the
determination of the protection.
600
1
400
2 - Repetitive Itsm is given for inrush current
with initial Tj = 70°C. In normal working , this
curve musn't be exceed. Be carefull, the
repetition of the surge current decrease the
lifetime SSR's .
No repetive surge current without voltage reapplied.
2
200
0
Repetive surge current with voltage reapplied.
fig 3
0,01
0,1
1
10
t (s)
Mounting and dismounting on DIN rail without any tool.
Panel Mounting
M5
M4
Mount ing
88±2mm
DIN rail connected to
protection wire (ground) .
Dismount ing
12,7mm
Ø
Warning ! semiconductor relays don't provide any galvanic insulation between the load and the mains. Always use in
conjunction with an adapted circuit breaker with isolation feature or a similar device in order to ensure a reliable isolation in the
event of wrong function and when the relay must be insulated from the mains (maintenance ; if not used for a long duration ...).
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