-- Version not possible ? Version possible 1) Screw terminal optionally with box terminals or with bar connections. Contactors with screw terminals: 3RT2 (sizes S00 to S3) and 3RT1 (sizes S6 to S12) 3RT contactors, sizes S00 to S12Our power range:
StandardsIEC 60947-1, EN 60947-1, 3RT contactorsThe 3RT2 contactors are climate-proof and are suitable and tested for use worldwide. If the devices are used in ambient conditions which deviate from common industrial conditions (IEC 60721-3-3 "Stationary Use, Weather-Protected"), information must be obtained about possible restrictions with regard to the reliability and endurance of the device and possible protective measures. In this case contact our Technical Assistance, Auxiliary contact complement
For detailed information on the fitting of auxiliary switches, see the asset "Selection guide for mountable auxiliary switch blocks" under "Accessories and Spare Parts" > "for SIRIUS 3RT2 Contactors and SIRIUS 3RH2 Contactor Relays" > “Auxiliary switch blocks" > "Instantaneous". Contact reliabilityIf voltages ? 110 V and currents ? 100 mA are to be switched, the auxiliary contacts of the 3RT contactors or 3RH contactor relays should be used as they guarantee a high level of contact reliability. These auxiliary contacts are suitable for solid-state circuits with currents ? 1 mA at a voltage of ? 17 V and higher. Connection methodMain circuit
Auxiliary circuit
Electromagnetic compatibility (EMC)The 3RT contactors fulfill the requirements for environment category A. Note: When the contactors are used in an environment with frequency converters, the information in the manuals must be observed, see topic "Technical specifications" > "More information". Short-circuit protectionFor short-circuit protection of the contactors without overload relay, see "Technical Specifications" of the relevant contactor. Refer to the manuals for details of short-circuit protection of the contactors with overload relays; see above under "More information". For the fuseless assembly of motor feeders consisting of a 3RV2 motor starter protector and a 3RT2 contactor, selection guides are available as described in "3RA2 Load Feeders"; see "Load Feeders and Motor Starters" > "for Use in the Control Cabinet". Motor protection3RT2 contactors 3RU2 thermal overload relays or 3RB3 electronic overload relays can be fitted to the 3RT2 contactors for protection against overload. For overload relays, see "Protection devices". 3RT1 contactors 3RB2 electronic overload relays can be fitted to the 3RT1 contactors for protection against overload. For overload relays, see "Protection devices". Plant and application monitoring 3RR2 monitoring relays can be fitted to the 3RT2 contactors for monitoring and measuring in the application. See "Monitoring and Control Devices" > "Relays" > "SIRIUS 3RR21, 3RR22 Monitoring Relays for Mounting on 3RT2 Contactors". Ratings of three-phase motors The quoted rating (in kW) refers to the output power on the motor shaft (according to the nameplate). The power rating specifications of the contactors in kW (in accordance with IEC 60947-4-1, Table G) are guide values for 4-pole standard motors at 50 Hz AC and specified voltage (e.g. 400 V AC). The actual starting and rated data of the motor to be switched must be considered when selecting the units. Surge suppression 3RT contactors supplied without a coil circuit can be retrofitted with RC elements, varistors, diodes or diode assemblies (assembly of diode and Zener diode for short break times) for damping opening surges in the coil.
Note: The OFF-delay of the NO contact and the ON-delay of the NC contact are increased if the contactor coils are attenuated against voltage peaks (for details see the relevant manual > topic "Technical specifications" > "More information"). Contactors with voltage tap-offSizes S00 to S3 The S00 to S3 contactors with voltage tap-off are special versions for mounting the SIRIUS function modules for connection to the control system through IO-Link or AS-Interface. See "Accessories and Spare Parts" > "for SIRIUS 3RT2 Contactors and SIRIUS 3RH2 Contactor Relays" > "Modules for Contactor Adaptation". Without a function module, the contactors can be used like the standard versions. For more information on IO-Link and AS-Interface see "Industrial Communication". Control supply voltageDifferent versions of operating mechanisms are available depending on the contactor size:
Operating mechanism typesSizes S6 to S12 Two types of solenoid operation are available:
Solenoid coils
Article No. scheme
Note: The Article No. scheme shows an overview of product versions for better understanding of the logic behind the article numbers. For your orders please use the article numbers quoted in the ordering data. |
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