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Electronic Speed Switch
Electronic Speed Switch
Protocontrol Instruments (India) manufactures an Electronic Speed Switch is basically used to monitor speed of conveyors, crushers, rolling mills, stirrers, screw conveyors, and other industrial machinery. This unit consists of two parts: control unit and sensor probe. The basic principle of speed monitor is comparison of pulses received from sensor with standard pulses. The sensor is to be mounted with its sensing face in close proximity of the rotating object. Flags are to be mounted on the rotation object, which are to be sensed by the sensor. Control unit is enclosed in din rail mounting/field mounting or flameproof mounting enclosure. The field mounting enclosure is suitable for working in dusty and dirty environment in water, oil and chemicals. It senses speed by non-contact way. Hence, there are no moving parts. There is no wear and tear of rollers or misalignment of couplings. This device actuates relay contact at preset speed. Using these contacts desired control action such as zero speed protection/under speed protection/over speed protection can be achieved. Initial time delay facility of 0 to 30 seconds is provided to allow the rotating mechanism to achieve the desired speed. Speed setting is possible from 1 RPM to 5000 RPM in optional ranges. Direction sensing and speed monitoring of various locations from single point is possible. The sensor is epoxy potted and housed in metallic/plastic tube. The control unit is enclosed cast aluminium/DMC enclosure.