Lovato SM3R Series Motor Protection Circuit Breaker, 55 to 75A Current Rating, 690V AC Voltage Rating - SM3R7500 This motor protection circuit breaker, classified within the SM3R series, is designed to deliver superior circuit protection. With a current rating adjustable between 55A and 75A, it effectively safeguards motors from overloads and short circuits. The robust dimensions of 70mm in length, 169mm in width, and 165mm in depth, alongside an operational temperature range of -20°C to +70°C, make it suitable for various industrial environments. Features & Benefits • Magnetic and thermal protection prevents motor damage
• High breaking capacity of 50kA at 400V for robust performance
• Adjustable thermal trip settings ensure tailored protection
• 3-pole configuration enhances versatility in applications
• Screw terminal design simplifies installation and maintenance
• Compact size optimises space in control panels Applications • Used with industrial motors to prevent damage
• Ideal for automation systems requiring reliable circuit protection
• Suitable for diverse environments with variable temperature conditions
• Compatible with various machinery in electrical installations What is the maximum voltage rating of this device? The voltage rating reaches up to 690V AC, ensuring compatibility with standard industrial supply systems. How does the thermal trip adjustment help in operation? By allowing current settings to be fine-tuned between 55A to 75A, it helps accommodate different motor specifications and operational needs, ensuring optimal protection. What are the implications of a breaking capacity of 50kA? This high breaking capacity allows the circuit breaker to quickly interrupt fault currents, minimising damage during short circuits and enhancing overall safety. Can it be used in low-temperature environments? Yes, it operates effectively in temperatures as low as -20°C, making it suitable for colder climates and applications. What type of maintenance is required for optimal performance? Regular inspections for wear and checking connections are advisable, along with ensuring that the thermal trip settings remain accurate for specific motor applications.