Power And Motor Wiring - Siemens SIKOSTART 3RW34 Betriebsanleitung

Asymmetric Motor Windings. Some delta motors are wound (or re-wound) asymmetrically. The soft starter is
unsuitable for these motors.
Power-factor-correcting (PFC) Capacitors. Do not use PFC capacitors at the soft starter output terminals.
Connection to the output terminals will damage the soft starter. If PFC capacitors are used, they must be connected
on the line side of the unit.
When an isolation contactor is used with the soft starter, the PFC capacitors must be disconnected from the soft
starter when the isolation contactor is open.
Active filters. Active filters (e.g. for reactive power compensation) must not be operated in parallel during operation
of the motor control unit.
Hazardous Environment. Depending on the system environment, consideration must be given to unexpected
hazards such as an accidental spray of gas, liquid or solid particles or inadvertent contact with moving machinery.
Since the soft starter's start/stop control circuitry includes solid-state components, a potentially hazardous
environment may require the installation of an additional hard wired emergency stop circuit that will either disconnect
AC input power to the SIKOSTART soft starter or disconnect the motor from the soft starter.
Multiple Motors. When the soft starter is used for more than one motor, be sure the combined full load current
(sum of individual motor FLAs ) does not exceed the soft starter's rated output current. Each motor requires separate
overload relay protection.
Bypassing the Soft Starter. When the soft starter is mounted in a sealed enclosure, a bypass contactor is generally
used to prevent heat from being generated by the SCRs during running. If not bypassed during operation,
supplemental cooling may be required depending on the operating current and enclosure size and type.
5.4

Power and Motor Wiring

3ZX1012-0RW34-1AN1
CAUTION
Hazardous voltage.
May cause property damage.
To avoid damaging solid-state power devices, do not
connect power-factor-correcting capacitors to the load
side of the soft starter.
DANGER
Hazardous voltage.
Will cause death or serious injury.
To avoid electrical shock or burn, turn off main and
control voltages before performing installation or
maintenance.
WARNING
Fire hazard.
Can cause death, serious injury, or property
damage.
Welding cable requires crimp type solderless
terminals to prevent arcing and possible fire.
Installation
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