Product category:
Machine Safety Monitoring and Control
News Release from: Power Electronic Measurements | Subject: RCTi ac current transducers
Edited by the Engineeringtalk Editorial
Team on 01 June 2006
Three-phase current measurement up to
50kA
The range of RCTi ac current transducer equipment produced by Power Electronic Measurements has now been extended to include a three-phase version.
The range of RCTi ac current transducer equipment produced by Power Electronic Measurements has now been extended to include a 3ph version In common with their other recently introduced single phase products, the RCTi-3ph is an industrially specified unit, designed for permanent installation, and suitable for use with oscilloscopes, data acquisition cards, power analysers and in power quality applications
This article was originally published on Engineeringtalk on 13 Mar 2007 at 8.00am (UK)
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AC current transducers for permanent installations
To meet increasing customer demand, Power Electronic Measurements (PEM), has designed and manufactured two new ranges of AC current transducer for permanent installation.
The flexible, clip around coil sensors are based upon Rogowski technology and can be easily retro-fitted.
Each coil is thin and lightweight, with three standard lengths which can be specified independent of measured current (from 500A to 50kA).
All coils are connected to a small single enclosure electronic integrator, which can be DIN rail as well as panel mounted.
A single isolated power supply (12 or 24V as standard, others including 48 and 110Vd/c also available) minimises cabling, helping to ensure a low cost per channel.
The unit can also be specified with BNC plug, detachable coil-cables for easy cabinet and control panel installation.
Other features shared by both the 3ph and single ph units are non-intrusive operation, with no power drawn by the coils from a circuit under test.
There is a predictable low phase shift with power frequencies of 50/60Hz and above, with wide-band width 0.6Hz to 800KHz for measurement of sub and higher frequency harmonics and complex waveforms.
The RCTi-3ph is an ideal replacement for medium/large current CT's (current transformer), but unlike a CT it is intrinsically safe to use because there is no danger of open circuit secondaries, high current surges or magnetic saturation.
A reading accuracy of +/-1.0% is claimed with an output load of greater than 10kohm, within an operating temperature range of -5C to +65C.
The product is CE marked and complies with EN61010-2001, EMC EN61326.
The product can also be customised for coil/cable lengths, current/output ratings, frequency responses and phase error requirements at different frequencies.
Further information is available from Power Electronic Measurements.
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