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M5400
M5400 Sweep Frequency reSponSe AnAlyzer (SFrA)
®
A tool for detecting “hidden” transformer faults
The M5400 detects mechanical failure or movement of windings due to short circuits,
mechanical stresses or transportation. Use it to ensure transformer performance, reduce
maintenance cost, and increase the service life of transformers.
A major advance in transformer condition analysis.
The M5400 uses Sweep Frequency Response Analysis, a proven technique for
making accurate and repeatable measurements. Pioneered by Doble the sweep
approach has become the industry standard and is the preferred method for
making frequency domain measurements.
Here’s how SFRA works: The M5400
sends an excitation signal into the transformer and measures the returning signals across a broad frequency range. By
comparing this response to baseline and
other results (such as from similar units),
you can identify deviations and confirm
internal mechanical problems.
DIAGnoSe problems early.
preVenT expensive equipment
failures.
Take
conTrol.
Why wait for problems to develop? With
the M5400’s non-intrusive test technique,
you can test your power apparatus any
time you suspect a problem. Or just use
it as part of your regular maintenance
program. Either way, you identify problems
before they lead to failure, such as:
• Core movement
• Winding deformation and displacement
• Faulty core grounds
• Partial winding collapse
• Hoop buckling
• Broken or loosened clamping structures
• Shorted turns and open windings
M5400
Sweep Frequency Response Analyzer
(SFRA) For Transformer Core & Winding
Movement Diagnosis.
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M5400 SFRA
Technical
Specifications
Excitation Source:
Channels: 1
Frequency Range: 10 Hz – 25 MHz
Output Voltage: 20 V peak-to-peak at
50 Ohms
Output Protection: Short circuit protected
Source Impedance: 50 Ohms
Calibration Interval: 3 years
Measurement Channels:
Channels: 2
Sampling: Simultaneous
Frequency Range: 10 Hz – 25 MHz
Max. Sampling rate: 100 MS/s
Input Impedance: 50 Ohms
Calibration Interval: 3 years
Data Collection:
Test Method: Sweep Frequency
PC Comm: Ethernet USB/Serial
Frequency Range: 10 Hz – 25 MHz
Number of Points: 1000 points (Default)
Up to1800 points
(Extended Range)
Point Spacing: 1.2 % Logarithmic
Dynamic Range: >90 dB
Repeatability: ±1 dB to –80 dB
IF Bandwidth: < 10% of active
frequency
Data Display:
Scaling: Linear/Log
Frequency Range: 10 Hz – 25 MHz,
user defined within
frequency range
Plotting: Frequency vs.
Magnitude / Phase
Analysis: Difference, Sub-band
Cross-Correlation
®
Physical Specifications:
Dimensions: 18.2 x 13.4 x 6.7 inch
46.2 x 34.0 x 17.0 cm
Weight: 13.1 lbs (6.0 kg)
Power Supply: 100-240V AC
Temperature: 0° to 50° C operating,
-25° to + 70° C
storage
Relative Humidity: 0% to 95 % non
condensing
Test Leads Construction:
Integrated three lead system in single cable set
Standard (362 kV and below): 60 ft/ 18 m
Optional (> 362 kV): 100 ft/ 30 m
PC Requirements: With minimum
configurations as:
Ethernet/USB Windows
2000 or Windows XP
Intel Celeron 1.3 GHz
Minimum 512 MB RAM
or more Minimum 40
GB DVD-RW
Specifications are subject to change without
notice.
M5400 Technical Merits
Range
The M5400 provides a frequency response measurement from 10 Hz to 25 MHz.
Doble recommends the default setting of 20 Hz - 2 MHz for transformers as there is
limited diagnostic value in measurements outside of this range. The diagnostic frequency
range of 20 Hz to 2 MHz covers the most important diagnostic areas:
• Core and Magnetic Properties
• Winding Movement and Deformation
• Interconnections – Leads and Tap Changers
Resolution
The M5400 measures the frequency response at logarithmically spaced frequency
intervals of 1.2%. A constant excitation level is maintained for each frequency
measurement. The M5400 has the ability to auto-scale each frequency measurement
providing an overall dynamic range of 80 dB with a ±1 dB accuracy. This gives the
highest combination of dynamic range and accuracy available.
Repeatability
The M5400 is a field-ready instrument for high quality measurements. The sweep
frequency approach combined with Doble’s world class engineering means that
frequency response measurements are highly repeatable and even subtle changes
can be used for diagnostic purposes.
Test Leads
We provide simple, robust test leads to handle the rigors of site testing.
International tests have proven repeatedly that we have the most reliable and
repeatable test leads available.
Practicality
The M5400 is supported by Doble’s world class Client Service Engineers and
decades of field experience. We have learned through practice and experimentation
what constitutes good field technique and know how to gain value and benefit from
the SFRA measurement. Let us work with you to bring that value and benefit to
your company!
Doble Engineering Company
85 Walnut Street
Watertown, MA 02472 USA
tel +1 617 926 4900
fax +1 617 926 0528
TOGETHER WE POWER THE WORLD
For more information, email sfra.info@doble.com
Doble is certified ISO 9001:2000
Doble is an ESCO Technologies Company
MKT-SL-M5400-01/10
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