SAF OPAL LT - Manual (Page 4)

Starter Selection
3
The RVS-AX electronic soft starter incorporates six
thyristors 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 (open contact terminals 1 and 2), motor's voltage
is slowly reduced to zero.
Soft-Start Characteristics
M%
Torque
I% U%
Current Voltage
100
100
400
10
50
100
Soft-Stop Characteristics
The Soft-Stop characteristic
may be used for controlled
deceleration of pumps and high
friction loads.
RVS-AX ratings and Frame sizes
Max. Motor
FLA (Amp) Starter Type
FLC (Amp.) Frame Size
(A luminum )
8 RVS-AX 8
17 RVS-AX 17
31 RVS-AX 31
44 RVS-AX 44
A1
58 RVS-AX 58
72 RVS-AX 72
A2
85 RVS-AX 85
105 RVS-AX 105
A3
145 RVS-AX 145
170 RVS-AX 170
A4
Dimensions (mm) & Weights (Kg)
Size Width Height Depth Weights (Kg)
A1 120 232 105 2.6
A2 129 275 185 5
A3 129 380 185 8.4
A4 172 380 195 11.8
The starter should be selected in accordance with the
following criteria:
1. Motor Current & Starting Conditions
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
Temp.
I start Acc. Time
300% In 30 Sec
350% In 20 Sec 40° C
400% In 5 Sec
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.
2. Mains Voltage
U%
Voltage
10
50
100 Each starter is factory set for one of the following
levels according to the Ordering Information.
Voltage Tolerance
380 - 415 V +10 -15 %
440 V +10 -15 %
460 - 500 V * +10 -15 %
575 - 600 V +10 -15 %
Frequency: 50 / 60 Hz.
* Starter’s rated 460-500VAC can be field modified
for system voltage of 220-240V, by placing the
internal Jumper J3 as shown below.
W V U
1 2 3 J3
1 2 3 1 2 3
220 to 240V 460 to 500V