Speed Switch Overview
A speed switch senses rotating shaft speed, comparing it to one or more settable over/under/zero speed alarm trip-points. A shaft speed sensor detects magnets embedded in a shaft-mounted pulser wrap/disc. As the shaft rotates, the passing magnets are detected across an air-gap as pulses with frequency proportional to shaft RPM. When the pulse frequency (shaft RPM) crosses to the alarm side of a trip-point threshold, a corresponding relay de-energizes, indicating the alarm.
Switch Applications
Zero Speed Switch - A switch used to determine if a rotating shaft comes to a complete stop.
Overspeed Detection - Utilizing a Speed Switch to monitor a shaft for speeds that exceed the determined setpoint.
Underspeed Detection - Utilizing a Speed Switch to monitor a shaft for speeds that fall below a desired setpoint.
Reverse Speed Detection - The detection of a shaft which not only stops but begins to rotate backwards.
Speed Switch Overview
A speed switch senses rotating shaft speed, comparing it to one or more settable over/under/zero speed alarm trip-points. A shaft speed sensor detects magnets embedded in a shaft-mounted pulser wrap/disc. As the shaft rotates, the passing magnets are detected across an air-gap as pulses with frequency proportional to shaft RPM. When the pulse frequency (shaft RPM) crosses to the alarm side of a trip-point threshold, a corresponding relay de-energizes, indicating the alarm.
Switch Applications
Zero Speed Switch - A switch used to determine if a rotating shaft comes to a complete stop.
Overspeed Detection - Utilizing a Speed Switch to monitor a shaft for speeds that exceed the determined setpoint.
Underspeed Detection - Utilizing a Speed Switch to monitor a shaft for speeds that fall below a desired setpoint.
Reverse Speed Detection - The detection of a shaft which not only stops but begins to rotate backwards.
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