Built-in frequency-protection controller with automatic voltage build-up and stable continuous output Key benefits — why you need this device - Protects your motor when speed drops: The built-in frequency protection circuit reduces output voltage as motor RPM falls, preventing damage from low-speed operation and improving safety and reliability. - Ensures reliable startup from residual magnetism: Automatic voltage build-up engages when residual magnetism exceeds 425 Hz, enabling consistent excitation without manual intervention. - Stable, continuous power for small excitation loads: Delivers a steady output designed for continuous use, reducing downtime and avoiding thermal stress on downstream components. - Broad mains compatibility: Works with common AC supplies, making it suitable for installations with 190–240 VAC, 50/60 Hz power sources. Core functions and performance - Frequency compensation: Built-in frequency protection circuit that decreases output voltage when motor speed decreases, maintaining safe operation during deceleration or load changes. - Automatic voltage build-up: Voltage builds up automatically when residual magnetism exceeds 425 Hz to restore excitation without external assistance. - Output rating: Voltage 75 V, Current 3.5 A (continuous) — suitable for applications requiring a stable 75 V excitation source at up to 3.5 A continuous load. - Input power: AC 190–240 V, 50/60 Hz — compatible with widely used mains voltages. Compatibility and integration - Designed for integration into motor excitation and control systems requiring a 75 V excitation supply and up to 3.5 A continuous current. - Compatible with installations on 190–240 VAC mains (50/60 Hz), supporting international power environments without additional conversion. - Form factor: electronic control module intended for use in motor control panels or equipment housings (mounting and enclosure depend on the specific model). Practical use scenarios - Generator excitation control: Provides stable 75 V excitation current for small generators or alternators, with automatic voltage recovery when residual magnetism conditions are present. - Motor protection during deceleration: In industrial drives where motor speed can drop sharply, the frequency compensation reduces output voltage to prevent over-excitation or damage during low-speed operation. - Retrofit or replacement in control panels: Use in motor control cabinets that require a reliable 75 V excitation source with continuous 3.5 A capability and compatibility with 190–240 VAC mains. What makes this product stand out - Combines frequency-based protection and automatic voltage build-up in one module for safer, more reliable excitation control. - Continuous current rating ensures predictable performance under sustained loads. - Simple electrical compatibility with common AC mains reduces installation complexity. Technical specifications - Frequency compensation: Built-in frequency protection circuit; output voltage decreases as motor speed decreases - Automatic voltage build-up: Activates when residual magnetism exceeds 425 Hz - Output: 75 V, 3.5 A (continuous) - Input: AC 190–240 V, 50/60 Hz Notes on selection and installation - Verify that your motor or generator requires a 75 V excitation source and that 3.5 A continuous is sufficient for your load. - Confirm mounting and enclosure requirements for your installation, and follow standard electrical safety and grounding practices.