CHAPTER 4: SETPOINTS CONTROL869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 4–343Figure 4-148: Reduced Voltage Start Current CharacteristicNOTENOTE:If this feature is used, the Starter Status Switch input must be either from a commoncontrol contact or a parallel combination of Auxiliary ‘52a’ contacts or a 1seriescombination of Auxiliary ‘52b’ contacts from the reduced voltage contactor and the fullvoltage contactor as shown in the diagram, Reduced Voltage Starting wiring example.Figure 4-149: Reduced Voltage Starting wiring examplePath: Setpoints > Control > Motor Starting > Reduced Voltage StartFUNCTIONRange: Disabled, Trip, ConfigurableDefault: DisabledCONTROL OUTPUT RELAY XFor details see Common Setpoints.TRANSITION MODERange: Current Only, Current or Timer, Current and TimerDefault: Current Only“Current Only”: When the motor load falls below the Start Current Level setting prior tothe expiration of the Start Timer, a transition will be initiated by asserting the ReducedVolt Ctrl operand for a period of one second. Any contact output assigned to this8940$1.cdrMOTORAMPS(% FLA)When the currrent falls belowthe Transition Level and/or theTimer expires, the AuxiliaryRelay activates for 1 secondTransition Time TIMEsignifiesOpen Transition3 x FLATransitionLevelFLA8940$1.cdrF13F14F15F16F17F18F19F20DIGITAL INPUTSDIGITAL INPUT 1DIGITAL INPUT 2DIGITAL INPUT 3DIGITAL INPUT 4DIGITAL INPUT 5DIGITAL INPUT 6DIGITAL INPUT 7COMMONSLOT F : I/O_AF21 +24 VREDUCED VOLTAGE STARTAPPLICATIONTRIPCLOSE/ AUXSTART INHIBITAUXILIARYCRITICALFAILURERELAYF3F4F5F6F7F8F9F10F11F12F22F23F24VVOUTPUT RELAYSF1F2CC 2- 2Typical auxiliarycontacts connectionCC2CC2-1+CC1-869STOPSTARTCC1-152a52bCC 1-2CC 1-2 CC 2-2
