Xylem SSW-07 Soft-Starter - Manual (Page 24)

CHAPTER 3 - INSTALLATION AND CONNECTION
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English
3.3 RECOMMENDED
SET-UPS
Some recommended set-ups are shown here and they can be
completely or partly used.
The main warning notes for all the recommended set-ups are
shown below and are described in the schemes by their respective
numbers.
NOTES!
The use of fuses or circuit breakers at the input circuit is
necessary for the entire installation protection. It is not necessary
to use ultra-fast fuses for the SSW-07 operation; however, their
use is recommended for the soft-starter complete protection.
The transformer “T1” is optional and must be used when there
is a difference between the line voltage and the electronic power
voltage.
In case that damage at the SSW-07 Soft-Starter power circuit
keeps the motor running (e.g., shorted thyristors), the motor
protection is obtained with the use of the power isolating
contactor (K1) or circuit breaker (Q1).
Start push-button.
Stop push-button.
Start/Stop switch. Bear in mind that when using two-wire digital
input command (normally open switch with retention), in case
of a power interruption, upon return of power, the motor will be
started immediately if the switch remains closed.
In case of maintenance of the Soft-Starter SSW-07 or the motor
it is necessary to remove the input fuses or disconnect the power
supply to ensure the complete equipment disconnection from
the power supply.
The emergency stop can be used by disconnecting the
electronics power supply.
Undervoltage release for the Q1 power isolation circuit breaker.
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