Semiconductor soft starter 3RW3 8.3.5 Commissioning Every SIRIUS 3RW soft starter comes with the following warning informa- tion, which it is imperative to observe: Warning This unit has been conscientiously tested at the works before delivery and found to be in proper working order. During the course of transportation, stresses may occur upon which we have no influence. As the result of this, the bypass relays in the main circuit may be in an undefined state In the interests of complete safety, the following procedure is necessary during commissioning or after a replacement of the SIRIUS soft starter:
Apply the supply voltage first to A1/A2 in order to set the bypass relays to a defined switching state. Then activate the main circuit (L1/L2/L3).. Otherwise, the motor may be inadvertently activated and may cause injuries or damage to parts of the system. Settings 3RW30 3RW31 t R on t R1 u S u S t R off t R2 Fig. 8-17: Settings, 3RW3 Note During initial commissioning, the settings of the "ramp time" and "starting voltage" potentiometers should not be changed. These settings must be determined by trial and error. Modifying settings The potentiometer settings are queried before every switching cycle ("ON" or "OFF")..
For example, if the setting for the starting time potentiometer is modified during starting of a motor, it takes effect the next time it is started. Rev. 08/99 8-29