• • • BATTERIES & CHARGERS • • •
Sweep Frequency Response Analyzer FRA500 F
RA500 can confirm the mechanical integrity of the transformer by comparing the frequency response of the transformer with the previously known results. Every transformer has a unique frequency response
system which changes if the mechanical geometry of the transformer is changed. These changes can occur due to physical movement of the active parts (caused by transportation, earthquakes), or mechanical impacts due to short- circuit forces after a failure.
FRA500 can be used to detect problems such as:
•Core movements •Shorted turns or open windings • Winding displacements or deformations • Winding connection problems • •
Broken clamping structures Faulty core grounds
FRA500 injects a sine wave signal with constant amplitude and variable frequency to one side of a transformer winding. The amplitude and phase angle values of the reference (output) signal are then compared with the corresponding values of the measured signal (from the second side of the winding). The ratio of the measured signal and reference signal magnitude is graphically displayed in dB through the full sweep frequency.
TEST RESULTS INTERPRETATION FEATURE
Connecting FRA500 to transformer (IEC 60076-18)
DV-FRA software provides an analytical tool that can perform correlation between two traces per the IEEE C57.149-2012, or DL/T 911-2004 standards.
DYNAMIC RANGES
The FRA500 offers a dynamic range greater than 150 dB with a measurement accuracy of ±0.1 dB from +10 to -40 dB and ±0.5 down to -100 dB. The higher dynamic range eliminates the effects of noise and facilitates the comparison of different sweeps.
SELF-CHECK TEST
As included accessories, there is always verification box intended for the self-check of the unit.
Carl Baldwin - General Sales Manager
cbaldwin@drallim.com | Tel: +44 (0)1424 205140 Web:
www.drallim.com
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PC based analysis software with user-friendly interface with
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4 ation w w. n. cbaldwin@drallim. om | Tel: +44 (0)1424 205140 | Web:
www.drallim.com 20 ELECTRICAL ENGINEERING • FEBRUARY 2021
For more information please contact: Carl Baldwin - General Sales Manager
cbaldwin@drallim.com
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Representin in t
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electricalengineeringmagazine.co.uk
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