The Ralli Wolf SPM 35 is a special purpose motor built for circuit breaker applications, standing apart from the rest of the SPM range with a continuous duty rating rather than a timed intermittent cycle. Available in 24V or 36V DC configurations, it's suited to low-voltage DC circuit breaker systems commonly found in battery-backed switchgear, substations and control panels.

Under no-load conditions, it draws 1.2A and 43.2W at 5,000 RPM. Under full load, current rises to 5A and input power to 180W, with speed settling to 4,600 RPM — a relatively small drop from no-load to full-load speed compared to other SPM models, indicating the SPM 35 holds its speed well under sustained load.

Its continuous duty rating is the standout feature in this model: unlike the SPM 18, 23, 24 and 25 — all rated for short, timed full-load bursts — the SPM 35 is built to run indefinitely at full load without a rest cycle. This makes it suited to circuit breaker functions requiring ongoing operation, such as continuous monitoring drives or persistent positioning functions, rather than the brief spring-charge or trip actions typical of the other SPM motors.

Key Features

• Available in 24V or 36V DC
• Continuous duty rating — no timed rest cycle required
• Holds speed well under load: 5,000 rpm no-load to 4,600 rpm full-load
• Purpose-built for circuit breaker applications
• Suited to low-voltage DC switchgear and substation systems
• Compact power draw: 43.2W no-load, 180W full load

Technical Specification

Application

• Circuit breaker operating mechanisms requiring continuous duty
• Low-voltage DC switchgear and substation systems
• Battery-backed control panel and switchgear equipment
• Power distribution equipment requiring sustained motor operation