Eaton S611 User Manual

Also see for S611: Installation leaflet Quick start installation guide Installation leaflet

Contents

8 S611 Soft Starter MN03902011E—May 2012 www.eaton.comCurrent Transformer InstallationWhen securing the Current Transformers (CTs) onto the T1,T2, and T3 bus bars of the soft starter, correct orientation ofthe CT must be observed to ensure proper operation of thesoft starter. Each CT is marked with a symbol “IX” adjacentto the leads. This symbol shown in the figure below indicatesthe line side (or voltage source side) of the device.CT OrientationLug Installation—MechanicalThe following procedures are to be followed duringmechanical lug installation:● The lug is mounted under the soft starter bus bar asshown● Do Not overtorque lug attachment hardware. Damage tothe supports may result● The lug is to be supported with a wrench or other suitabledevice to prevent excessive side loads on the bus barsupports that may result in damage to the supportsLug Mounted Under Soft Starter Bus BarPower WiringUsing the wiring diagram on this page and the table onPage 9 as guides, connect the line and motor wiring inaccordance with appropriate local and national codes.Note: To provide optimum motor protection the line andmotor power wiring should be tightly bundled and runperpendicular to the orientation of the S611.WARNINGHazardous voltage can cause electric shock and burns.To avoid shock hazard, disconnect all power to thecontroller, motor or other control devices before anywork is performed on this equipment. Failure to do sowill result in personal injury, death or substantialproperty damage.Do not apply a disconnect device on the output of theS611 soft starter unless a means to turn off the softstarter when disconnect switch is open is used. Openingdisconnect while the soft starter is operating may causea malfunction. Closing disconnect switch while the softstarter is operating will result in a soft starter failure andpotential equipment damage and personnel hazard.Note: Short-circuit protection must be applied on the lineside of the soft starter.The S611 is wired only in an inline connected configuration.By factory default, the S611 is to be connected with an ABCphase rotation on the incoming power wiring. If the motorturns in the incorrect direction upon energization, exchangetwo phases at the motor terminal box or at the outputterminals of the soft starter. Changing the input wiring maycause a voltage phase reversal trip.If the input phase sequence to the S611 cannot be changed,the incoming phase sequence protection will need to be setto ACB. Setting ACB as the incoming phase sequencecauses the S611 to recognize the reverse direction of phaserotation. Phase rotation monitoring may be turned off byadjusting the phase sequence parameter in the protectionmode list.! IMPORTANTA reversing contactor must never be switched while the softstarter is operating. In order to gain the full benefit of theS611 with a reversing contactor, the S611 needs to be OFFwhen switching the direction of the motor. The soft startersettings must account for catching a motor spinning in theopposite direction upon soft restarts. The time required forslowing the motor to a stop and then ramping up to speed inthe opposite direction adds to the overall starting time. Thiscondition will also impact the overload protection setting.www.comoso.com