Section
Ⅵ
Protection and description
20
PR5200(C) series soft starter can be verified through the actual or simulation method. If
it can't meet the user's requirements, special protection device should be added to ensure
safety
。
6-2
Protection level setting description
6-2-1.
In order to adapt to different applications, PR5200(C) series soft starter has
five protection level, there are 0: primary, 1: light load, 2: Standard 3: heavy, 4:
Advanced, it setted by PA setting. Among them,
(1)Primary protection is against to the function of external terminal instantaneous
stop, meanwhile only remains the overheating, short circuit and main circuit fault
protection, it can be applied to needed emergency start in unconditional occasion, such
as fire systems, etc.
(2)The three protection level of light load, standard load and overload have the
complete protection function. The difference is the time curves of motor overloaded
thermal protection are not the same. The time parameters of motor thermal protection
are as Table 6.1 and Chart 6.1.
(3)High level of protection standards is stringent at start. Other protection features
parameters keep the same with standard protection set.
6-2-2.
Protection level and thermal protection time according to PA setting is as the
diagram below
：
Diagram 6.1
PA setting
0(Primary)
1(Light load) 2(standard)
3(heavy load)
4(high
grade)
Description
Running overload
Level of protection
no
2 level
10 level
20 level
10 level
According
to
IEC60947
-4-2 Standard
Start over-current
Protection time
no
3 seconds
15 seconds
30 seconds
15 seconds
Starting current for
more than P6setting
5times calculation
Overload trip time
running list
Current
multiple (I/Ie) 3
4
5
3
4
5
3
4
5
3
4
5
Typical values
for the table
Trip time
(seconds)
4.5 2.3 1.5 23
12 7.5 46
23
15
23
12 7.5
6-2-3.
According to IEC60947-4-2 standard curve of the motor thermal protection
tripping time is as follows:
Chart 6.1
