4 • Technical Data
________________________________________________________________________________________________
3.
TECHNICAL DATA
3.1
Introduction
The Solstart Plus electronic soft starter incorporates four thyristors (Two phase control) to start a three-phase
squirrel cage induction motor.
By supplying a slowly increasing voltage, it provides soft start and smooth stepless acceleration, while drawing
the minimum current necessary to start the motor.
A Soft Stop feature can be enabled when the Ramp-Down potentiometer is adjusted. When used, upon stop
signal (disconnect discrete input voltage from terminals 3 and 4), motor's voltage is slowly reduced to zero.
The Solstart Plus incorporates a built in motor protection of Overload protection, phase loss protection and
under voltage protection.
The Solstart Plus incorporate an internal protection to protect its heatsinks from over heating.
3.2
Rating and frames sizes
3.3
Starter Selection
Select the starter according to motor's Full Load Ampere (FLA) - as indicated on its nameplate (even if the
motor will not be fully loaded).
The Solstart Plus is designed to operate under the following maximum conditions:
Ambient
Temperature
[
0
C]
Starting Current
[A]
Acceleration Time
[sec]
300%xIn
15
350%xIn
10
40
400%xIn
5
Max. starts per Hour: four (4) starts per hour at maximum ratings and up to 10 starts per hour at light load
applications (consult factory).
Note
:
For very frequent starts (inching applications) the inching current should be considered as the Full Load
Current (FLC) (consult factory).
Solstart Plus
model
FLC
[A]
Dimensions
WxHxD
[mm]
E
O
A
R
e
la
y
F
a
u
lt
R
e
la
y
A
lu
m
in
iu
m
c
a
s
e
D
in
R
a
il
m
o
u
n
te
d
Solstart Plus 31
31
65x190x114
-
O
Solstart Plus 44
44
65x190x114
-
O
Solstart Plus 58
58
120x265x121
-
Solstart Plus 72
72
120x265x121
-
Solstart Plus 85
85
120x265x121
-
Solstart Plus 105
105 120x265x121
-
Solstart Plus 145
145 129x275x182
-
Solstart Plus 170
170 129x275x182
-
Notes:
•
(O) – Optional
•
EOA – End Of Acceleration Relay available in Solstart Plus
models 58A and up.
•
Refer to section
5 on page 11 for detailed dimensions.