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3RU1126-4AD0 Dataheets PDF



Part Number 3RU1126-4AD0
Manufacturers Siemens
Logo Siemens
Description Bimetallic Class 10 Overload Relays
Datasheet 3RU1126-4AD0 Datasheet3RU1126-4AD0 Datasheet (PDF)

IEC Overload Relays GENERAL SIRIUS 3RU11 Bimetallic Class 10 Overload Relays Description 3RU11 overload relays belong to the new generation of SIRIUS 3R control products. The 3RU11 overload relays replace the highly successful 3UA5 and 3UA7 devices. Outstanding features of the new overload relays include long term stability and long service life. The overload relays are optimally matched, both electrically and mechanically, to the 3RT10 contactors. They can also be mounted as a single unit with.

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IEC Overload Relays GENERAL SIRIUS 3RU11 Bimetallic Class 10 Overload Relays Description 3RU11 overload relays belong to the new generation of SIRIUS 3R control products. The 3RU11 overload relays replace the highly successful 3UA5 and 3UA7 devices. Outstanding features of the new overload relays include long term stability and long service life. The overload relays are optimally matched, both electrically and mechanically, to the 3RT10 contactors. They can also be mounted as a single unit with the use of a separate mounting bracket. 3RU11 overload relays cannot be mounted onto 3TF contactors. The 3RU11 overload relays are available in four distinct frame sizes up to 100A. The selection charts in this catalog refer to the different frame sizes by their catalog numbers, i.e. 3RU111, 3RU112, 3RU113, and 3RU114. The sixth character in the part number designates the frame size. This “size number” is consistent with, and matches up to, the same four frame sizes of the other IEC products in this catalog. However, it is important to note that other SIRIUS 3R catalog versions in circulation throughout the world refer to these four sizes as S00, S0, S2, and S3 respectively. It is a possibility that these four frame size references (S00, S0, S2, and S3) may appear on product labels as well. Application 3RU11 overload relays provide overload protection for three-phase inductive motors with rated currents of up to 100A (75HP , AC-3, 480V). They are used in conjunction with 3RT10 contactors to form motor starters. Ambient conditions Thanks to the newly integrated bimetal and continuous temperature compensation, these devices can be used without derating at an ambient temperature of up to 60°C (140°F). Use up to 70°C (158°F) is possible with derating. (See Siemens Industrial Control Products Catalog - CPPC-06000). Auxiliary contacts The overload relays are equipped with a NC contact for de-energizing the contactor and a NO contact for signalling an overload trip. The breaking capacity of the switching contacts is very high so that the contactor coils can be switched directly. Trip class The 3RU11 overload relays are designed in accordance with trip class 10, i.e. trips in less than 10 seconds at 6 times the trip current setting (FLA). 1 2 3 4 5 6 1 2 3 5 6 7 8 4 9 7 8 9 Equipment identifying marker Manual/automatic RESET selector switch STOP button Complete Catalog No on front of device Switch position indicator and TEST function Transparent cover, sealable (secures the current setting screw, TEST function and manual/automatic RESET position) Current setting dial Terminal for contactor coil (when mounted on contactor) Terminal for contactor aux. contacts (when mounted on contactor) 3RU111 Overload Relay Phase failure sensitivity A phase failure sensitivity function is integrated in order to provide increased protection in the event of a phase failure, i.e. faster tripping in the event of a single-phase condition. Setting the overload relay The current setting dial can be accessed once the transparent, sealable cover has been opened. The overload relay must be set at the rated full-load amps (FLA) of the motor. STOP function Pressing the red STOP button on the overload relay momentarily opens the NC trip contact. No other contacts and/or functions are affected by this STOP button. Manual/automatic reset The RESET button/mechanism features tripfree operation. This means that the overload relay will trip on an overload condition regardless of whether the reset button is pushed in or not. Manual or automatic reset can be selected with the blue button. The appropriate setting is selected by pressing and turning the button. This setting can then be locked by the sliding transparent cover. TEST function and switch position indicator The switch position indicator also incorporates a test function which, when activated, simulates a tripped overload relay. Both auxiliary contacts are actuated and the switch position is indicated. Terminal for contactor coil and auxiliary contact When the 3RU111 overload relay is mounted directly on the contactor, the auxiliary contact terminal and the coil terminal A2 of the contactor are fed through to the bottom side of the overload relay. This helps considerably in expediting the wiring for both new and retrofit applications. The carry through of the A2 coil terminal to the bottom of the overload relay is not necessary with the 3RU112, 3RU113, and 3RU114 devices since the associated contactors are equipped with four point coil connections and the auxiliary contacts are either front or side mounted. Cage Clamp connection 3RU11 overload relays are available with Cage Clamp terminals. 3RU111 overloads have Cage Clamps on the auxiliary and power terminals. 3RU112, 3RU113, and 3RU114 overloads, however, have Cage Clamps on the auxiliary terminals only. The power terminals on 3RU112, 3RU113, and 3RU114 overloads must remain screw type. Accessories The accessories available are suitable for .


3RU1126-1KD0 3RU1126-4AD0 3RU1126-4BD0


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