Ideal for installation in steel mills, mining (ore and coal) operations, grain handling and chemical and plastic industries to protect elevators, feeders, and conveyors from speed related damage resulting from broken belts, overloads or belt slippage

Used as overspeed switches to detect motor overrun conditions. Pickup speed should be set above normal operating speeds. The output relay will energize if operating speed exceeds the set point

Used as underspeed switches to detect slipping belts, jammed conveyors or equipment and stalled motors: Pickup speed setting should be below normal operating speeds. The output relay will de-energize if operating speed falls below the set point

Used as zero speed switch: When speed approaches zero (0.1 RPM), the output relay will de-energize

Signal range: three settings available (0.1-10 RPM

1-100 RPM

10-1000 RPM)

Adjustable time delay (up to 45 seconds)

Input power is applied to the speed responsive switch at all times. The switch then senses input shaft speed in either direction. Clockwise or counterclockwise rotation

When input shaft speed exceeds the pickup set point, the output relay is energized

If shaft speed falls below 80-85% of the pickup speed the relay will de-energize

Senses speed changes as slight as 1%

3/4#8221

NPT standard, two conduit openings

Flexible coupling accessory allows up to 7.5° misalignment, high shock resistance and eliminates transmission of thrust loads