SMS SMS-start - Page 11

REV 4.1 Printed 09/2018
SMS-start
11
SMS-start can be connected either on the line that powers the motor (Fig. 1), or inside the delta
of the motor (Fig. 2), if you are using a motor with the windings connected in delta when powered
by mains voltage (i.e. 400/690 motor with 400V mains power or 230/400 motor with 230V mains
power).
When SMS-start is connected to the delta, the current passing through it (IF) is 1.6 times lower
than the line current (IL). It can therefore be used for motors with a rated current 1.6 times greater
rated current.
TYPESMS-start
MAX Motor Current
Connection on line
(Picture 1)
Connection on
delta (Picture 2)
SSV040 40 65
SSV070 70 115
SMS-start adapts automatically to the connection implemented and to the network phase se-
quence. In the event that it is necessary to reverse the motor rotation, it is su󰀩cient to reverse
two supply phases between them (e.g. R with S), and consequently modify the connection of the
eventual PHASE CONTROL device, so that it keeps working ne.
IMPORTANT!
In the case of internal delta connection, it is necessary swap R with S and not
L1 with L2!
PICTURE. 1-CONNECTION ON LINE PICTURE. 2-INSIDE CONNECTION IN DELTA
ENGLISH
We suggest the connection of SMS-start upstream of the contactors; (this is) because once that
power supply is removed the thermal memory, that allows di󰀨erent operating time according to
the absorbed current, is reset (see operating paragraph).
Without thermal memory the device is not able to be protected by any overload.
CONTROL CIRCUITS CONNECTION
CONNECTIONS MOTOR