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Reference Manual Protection Equipment - …
Protection EquipmentOverload RelaysReference Manual March 2010 Industrial ControlsSiemens 20102 IntroductionOverload RelaysGeneral data3- Overview3RU1 Thermal Overload Relays3RU11 for standard applications7- Overview7- Design8- Function9- Technical specifications14- Characteristic curves15- Dimensional drawings16- Schematics17 Accessories3RB2 Solid-State Overload Relays3RB20, 3RB21 for standard applications18- Overview18- Design19- Function20- Technical specifications25- Characteristic curves26- Dimensional drawings27- Schematics3RB22, 3RB23 for high-feature applications28- Overview29- Design30- Function32- Technical specifications37- Characteristic curves38- Dimensional drawings40- Schematics42 AccessoriesProtection EquipmentProtection EquipmentIntroduction2 Siemens 2010 Overview 1) The units are responsible in the main circuit for overload Protection of the assigned electrical loads (e. ), feeder cable and other switching and Protection devices in the respective load ) Size S3 up to 1000 V ) Size S2 (only with straight-through transformer), S3, S6, S10, S12up to 1000 V ) With Reference to the 3RB29.
Protection Equipment Overload Relays Reference Manual • March 2010 Industrial Controls
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