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Primary brand
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Siemens
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Main function
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Thermal Overload Relay (TOR)
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Product series / family name
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SIRIUS
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Sub-range name
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3RU21 series
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Type
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Option = Standard (No options)
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Functions
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Thermal Overload Protection Relay (TOR)Motor protectionRotary knob for adjusting rated motor currentStop functionTest trip function
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Design
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for direct connection to cont.Bi-metal switching mechanismAmbient compensated in a range of -4°F to 140°F
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Poles
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3-poles (3P)
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Rated current
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5A < In ≤ 10A 10A < In ≤ 15A
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Rated current
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9A-12.5A (adjustable)
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Rated active power (kW)
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5.5kW
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Rated active power (kW)
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5.5kW (400Vac)7.5kW (500Vac)7.5kW (690Vac)
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Rated power (HP)
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10HP
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Rated voltage (AC)
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690Vac
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Connection type (electrical)
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Terminals (Screw-clamp)
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Connection type
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direct connection to contact. (ingoing main connections)Screw-clamp connections (outgoing main circuits)Screw-clamp connections (control circuits)
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Poles
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3P
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Protection functions
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Thermal overload Class 103-phase overloadwith phase loss sensitivityPhase unbalance trippingPhase failure trippingSingle-phase loads protection
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Protection settings
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Overload protection -- 9A-12.5A (adjustable)
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Net Height (mm)
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85mm
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Net Width (mm)
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45mm
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Net Depth (mm)
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85mm
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Mounting mode
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Direct mounting on contactor
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Mounting mode
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Direct mounting on cont.
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Operating mode
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Manual or automatic reset
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Contacts type
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1NO+1NC aux. contacts (FAULT)
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Dimensions
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Size S0
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Dimensions (frame size)
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S0
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Technical compatibility with
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3RT202 series
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Order code / Manufacturer SKU
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3RU2126-1KB03RU21261KB0
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Manufacturer product status
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Commercialized
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Equivalent to
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3RU21261KB0
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EAN code
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4011209780927
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UPC code
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662643919165
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Compliant with standard(s)
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IEC 60947-1IEC 60947-4-1IEC 60947-5-1IEC 60801-2IEC 60801-3IEC 60801-4IEC 60801-5UL 508CSA C22.2IEC 50019DIN VDE 0165DIN VDE 0170DIN VDE 171KEMA Ex-97.Y.3235DMT 98 ATEX G001EN 50019
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Location of origin
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Germany
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Protection functions
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Thermal overload protection = Class 10
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Product title
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Thermal Overload Protection Relay (TOR) - Siemens SIRIUS
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