Atec M5400 User Manual

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.

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 [phone]

fax [phone]

TOGETHER WE POWER THE WORLD

For more information, email [e-mail]

Doble is certified ISO 9001:2000

Doble is an ESCO Technologies Company

MKT-SL-M5400-01/10