Overview

Operating conditions

3RV1 motor starter protectors are suitable for use in any climate. They are intended for use in enclosed rooms in which no severe operating conditions (such as dust, caustic vapors, hazardous gases) prevail. When installed in dusty and damp areas, suitable enclosures must be provided.

3RV1 motor starter protectors can optionally be fed from the top or from below.

The permissible ambient temperatures, the maximum switching capacities, the tripping currents and other boundary conditions can be found in the technical specifications and tripping characteristics, see "Reference Manual for Protection Equipment – Motor Starter Protectors · Molded Case Motor Starter Protectors", http://support.automation.siemens.com/WW/view/en/65032586.

3RV1 motor starter protectors/circuit breakers are suitable for operation in IT systems (IT networks). In this case, the different short-circuit breaking capacity in the IT system must be taken into account; see Reference Manual for Protection Equipment – Motor Starter Protectors · Molded Case Motor Starter Protectors", http://support.automation.siemens.com/WW/view/en/65032586.

Since operational currents, starting currents and current peaks are different even for motors with identical power ratings due to the inrush current, the motor ratings in the selection tables are only guide values. The specific rated and start-up data of the motor to be protected is always paramount to the choice of the most suitable motor starter protector. This also applies to motor starter protectors for transformer protection.

Note:

For use of size S3 3RV1 motor starter protectors in combination with high energy-efficiency IE3 motors, observe the notes on design and configuration, see "Configuration Manual for SIRIUS controls with IE3 motors", http://support.automation.siemens.com/WW/view/en/94770820.

3RV1 motor starter protectors/circuit breakers in sizes S00 to S2 are not specially optimized for use with IE3 motors. In this case, use the new motor starter protectors in the 3RV2 series; see "SIRIUS 3RV2 motor starter protectors/circuit breakers up to 80 A".

Possible uses

The 3RV1 motor starter protectors can be used:

• For short-circuit protection
• For motor protection (also with overload relay function)
• For system protection
• For short-circuit protection for starter combinations
• For transformer protection
• As main and EMERGENCY-STOP switches
• For fuse monitoring
• For operation in IT systems (IT networks)
• For switching of DC currents
• As voltage transformer circuit breakers
• In areas subject to explosion hazard (ATEX)
• Approved as circuit breakers according to UL 489 (3RV1742)

For more details see Reference Manual “Protection Equipment – Motor Starter Protectors · Molded Case Motor Starter Protectors", http://support.automation.siemens.com/WW/view/en/65032586.