Motor protection circuit breaker MMS-32S - current 17A MMS-32S 17A

MMS-32S Motor Circuit Breaker

The MMS-32S motor circuit breaker is an advanced protective device from the LS Electric series, specifically designed to protect electric motors in industrial applications. Thanks to its thermomagnetic tripping mechanism, it protects against overloads and short circuits while allowing precise adjustment of operating parameters.

Operating parameters and application capabilities

The device operates within a wide voltage range from 230V to 690V, making it a universal solution for various types of installations. A rated operating power of 7.5 kW at AC-3, 400V allows for safe operation with medium-power motors, and the three-pole design ensures full control over all power phases.

The overload trip setting range of 11-17A enables precise adjustment to the characteristics of a specific motor, which is crucial for optimal protection without unnecessary trips. The instantaneous short-circuit trip with a setting of 221A guarantees an immediate response in the event of a short circuit, protecting the installation from serious damage.

Construction and safety

The motor circuit breaker is designed as a fixed-mount device, ensuring stable installation and reliable operation in industrial conditions. Screw connections allow for secure and durable wire connection, eliminating the risk of loose connections during operation.

The IP20 protection rating protects against contact with live parts and against access to solid objects larger than 12.5mm. The rated short-circuit breaking capacity of 15 kA at 400V AC guarantees safe interruption even of large short-circuit currents.

Application and user benefits

The thermomagnetic tripping mechanism eliminates the need for additional overcurrent protections, simplifying installation and reducing costs. Precise adjustment of the overload range allows for optimal matching of the protection characteristics to the actual motor operating conditions, which extends the lifespan of both the device itself and the protected equipment. The compact design facilitates mounting in switchboards and control cabinets.