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Parameterization
5-48 | SRW 01
5
5.7.12 Service Factor
When the service factor (S.F.) is different from 1.00 and there is the need of using it, there are points in the cold
motor graph for a S.F. = 1.15.
P406 – Service Factor
Adjustable
Range:
1.00 to 1.50
Factory
Setting:
1.15
Proprieties:
Sys, CFG
Description:
It selects the service factor for the SRW 01 overload protection.
Due to the IEC 947-4-1 standard, the SRW 01 defines 1.15 as the default S.F..
In order to identify the thermal protection actuation times for other S.F. it is only necessary to shift the “xIn” line
proportionally to the left.
t(s)
Motor x In
15
20
25
Cold
0
F.S.=1.15
F.S.=1.25
2x
3x
4x
Figure 5.25:
Using the S.F. to identify a new time as well as the other protection devices
5.7.13 Cooling Time
The parameter P642 adjusts the cooling time. If it is adjusted in 0 s, P642 is disabled and the cooling time obeys
the thermal model curve, according to the
(b)
. However, if the parameter P642 is
adjusted with a value different from 0, as 50 for instance, then after switching off the motor the thermal image will
be reset after 50 s, according to the
(c)
.
P642 – Cooling Time
Adjustable
Range:
0 = Disabled
1 to 3600 s = Enabled
Factory
Setting:
0 s
Proprieties:
Sys, rw
Description:
It defines the cooling time. If P642 = 0, the function remains disabled.
ATTENTION!
If a cooling time different from 0 is adjusted, the motor must be sized in order to comply with the
starting regimen. Parameter P050 is reset during the relay initialization.
Содержание SRW 01
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