Current transducers often referred to as current
sensors, detect the electric current in a wire and generates an electrical
signal that is proportional to the current value that has been detected. The
signal that has been generated could be analogue voltage, current or a perhaps
a digital output. This generated signal can then be utilised to display the
measured current in an analogue or digital ammeter, or utilised to control another circuit.
Current transducers are generally available in either open-loop or
Open-Loop sensors measure AC and DC currents and provide an output
voltage proportional to the measured current without using a feedback control mechanism.
The preferred sensor of choice in battery-powered circuits due to its low power
consumption and physical size. Potential applications including variable
speed drives, UPS overcurrent protection and welding machines.
Closed-Loop sensors depend on feedback control to provide an
output that is proportional to the current being measured. Sometimes called a Zero-Flux
sensor, it features a Hall-Effect sensor that feeds back an opposing current
into its secondary coil. Closed-loop sensors are often used when high accuracy is
Kempston Controls stocks a select
range of current transducers from market leading manufacturers such as Honeywell
and Frer, designed to suit
many applications. Give our dedicated sales team a call on +44 (0) 1933 411411
or use the contact form above to discuss your current transducer requirements.