REV 4.1 Printed 09/2018
SMS-start
10
Type of SMS-start SSV040 SSV070
Rated current for light load
Application for LIFTS - INTERMITTENT duty (*)
40A 70A
Rated current for heavy load
INDUSTRIAL application - CONTINUOUS duty
25A 40A
Maximum starting current 120A 210A
Maximum instantaneous current 180A 270A
Ramp maximun time: for acceleration (ACC) and Deceleration (DEC) 7 sec 3 sec
Ambient temperature 0 ÷ 50°C . Degree of protection IP20
(*)Duty is considered intermittent where the motor drive starts for a duration below or equal to 60” each 120”.
SMS-start is designed to be able to carry out an increased number of starts per hour, even in
critical conditions.The maximum number of starts per hour depends on the acceleration duration,
as shown in the Table below:
Acceleration time MAX No. Starts/Hour
1 sec 75 starts/h
2 sec 40 starts/h
3 sec 25 starts/h
4 sec 18 starts/h
5 sec 15 starts/h
The Table shows the maximum number of starts per hour which can be obtained at an ambient
temperature of 50°C and at starting currents equal to the maximum current supported by the
device. At lower temperatures and currents, the number of starts per hour may be increased.
In order to protect the power component (SCR) and to avoid dangerous conditions in the event of
a short circuit, you are advised to install, upstream of the power line (L1-L2-L3), 3 fuses with an
I²t the the one is supported by the SCR.
The fuses shown in the Table ensure Type 2 protection.
Type of SMS-start I²t SCR @ 45°C
Type
ITALWEBER
Code
ITALWEBER I²t Fuse
SSV040 2120 CH14 50A aR 1461050 1800
SSV070 6810 CH22 80A aR 1462080 6600
SSV040 SSV070
Power terminals L1-L2-L3-U-V-W 10mm² 16mm²
Command terminals 1-2-3-4-5 1mm² 1mm²
The electrical connections to the SMS-start device must be carried out in accordance
with the isolations and maximum temperatures allowed by the cables.
The Table shows the minimum cross sections, where H07V-K type cables are used.
n.a for 70A
n.a for 70A
TECNICAL FEATURES
PROTECTION FUSES
ENGLISH
CONNECTIONS
NUMBER OF STARTS/HOUR
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