Current sensors in a single package
October 2013
Sensors & Transducers
NK Technologies of the USA has released the ATS series of current sensors, combining a current operated switch and a current transducer into a single package for use in AC applications up to 1200 A. The large sensing window (46 mm) provides complete isolation between the primary circuit and the controls. The DIN rail mounting makes installation easy and provides a secure mounting resistant to conductor movement.
The transducer produces an analog output at all times to detect increases or decreases in current, with a limit alarm contact for over or under current conditions. An extra large aperture allows for single or multiple conductor passage and there is instantaneous monitoring of current when connected to a suitable panel meter. A patented rotary switch set-point selection enables the transducer to be easily set up in the field, with the trip point clearly shown on the labelling.
A 4-20 mA analog signal proportional to 0-1200 A AC is available at all times. Component count is reduced by combining the transducer and limit alarm in one package.
The analog signal is self-powered from the unit, so no additional power supply is required. LED indication is provided if the power is removed from the sensor or the primary current exceeds the adjustable trip set point and there is a field adjustable time delay from 0,5 to 12 seconds.
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