4 • Technical Data
________________________________________________________________________________________________
3.
TECHNICAL DATA
3.1
Introduction
The RVS-AX electronic soft starter incorporates six thyristors (Three phase control) to start a three-phase
squirrel cage induction motor and an internal bypass (Internal bypass in RVS-AX31A and higher).
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, motor's voltage is slowly reduced to zero.
The RVS-AX incorporates a built in motor protection of Overload protection and Phase loss protection.
The RVS-AX incorporates an internal protection to protect its heatsinks from over heating.
No control voltage is required to operate the RVS-AX.
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 RVS-AX is designed to operate under the following maximum conditions:
Ambient
Temperature
[
0
C]
Starting Current
[A]
Acceleration Time
[sec]
40
300%xIn
30
350%xIn
20
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).
RVS-AX
model
FLC
[A]
Dimensions
WxHxD
[mm]
Weight
[kg]
E
O
A Re
la
y
Faul
t R
el
ay
Int
er
na
l
bypass
RVS-AX 8
8
120x232x105
2.6
No
RVS-AX 17
17
120x232x105
2.6
No
RVS-AX 31
31
120x232x105
2.6
RVS-AX 44
44
120x232x105
2.6
RVS-AX 58
58
129x275x185
5
RVS-AX 72
72
129x275x185
5
RVS-AX 85
85
120x380x185
8.4
RVS-AX 105
105
120x380x185
8.4
RVS-AX 145
145
172x380x195
11.8
RVS-AX 170
170
172x380x195
11.8
Notes:
•
(
) – Standard
•
Refer to section
5 on page 11 for detailed dimensions.