Atec Megger-frax150 User Manual download pdf

FRAX 150

Sweep Frequency Response Analyzer

Highest dynamic range and accuracy

in the industry

Built-in PC with powerful backlit screen

for use in direct sunlight

Highest possible repeatability by

using reliable cable practice and

high-performance instrumentation

Fulfills all international standards

for SFRA measurements

Advanced analysis and decision support

built into the software

Imports data from other FRA test sets

FRAX 150

Sweep Frequency Response Analyzer

DESCRIPTION

Power transformers are some of the most vital components

in today’s transmission and distribution infrastructure.

Transformer failures cost enormous amounts of money

in unexpected outages and unscheduled maintenance. It

is important to avoid these failures and make testing and

diagnostics reliable and efficient.

The FRAX 150 Sweep Frequency Response Analyzer

(SFRA) detects potential mechanical and electrical

problems that other methods are unable to detect. Major

utilities and service companies have used the FRA method

for more than a decade. The measurement is easy to

perform and will capture a unique “fingerprint” of the

transformer. The measurement is compared to a reference

“fingerprint” and gives a direct answer if the mechanical

parts of the transformer are unchanged or not. Deviations

indicate geometrical and/or electrical changes within the

transformer.

FRAX 150 detects problems such as:

Winding deformations and displacements

Shorted turns and open windings

Loosened clamping structures

Broken clamping structures

Core connection problems

Partial winding collapse

Faulty core grounds

Core movements

APPLICATION

Power transformers are specified to withstand mechanical

forces from both transportation and in-service events, such

as faults and lightning. However, mechanical forces may

exceed specified limits during severe incidents or when

the insulation’s mechanical strength has weakened due to

aging. A relatively quick test where the fingerprint response

is compared to a post event response allows for a reliable

decision on whether the transformer safely can be put back

into service or if further diagnostics is required.

Collecting fingerprint data using Frequency Response Analysis (FRA) is an

easy way to detect electro-mechanical problems in power transformers

and an investment that will save time and money.

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FRAX 150 1
ORDERING INFORMATION 6

Summary of Contents

Page 1 - FRAX 150

FRAX 150Sweep Frequency Response Analyzern Highest dynamic range and accuracy in the industryn Built-in PC with powerful backlit screen for use in d

Page 2

Method BasicsA transformer consists of multiple capacitances, inductances and resistors, a very complex circuit that generates a unique fingerprint or

Page 3

FRAX 150Sweep Frequency Response AnalyzerTest Object Browser — Unlimited number of tests and sweeps. Full user control.Quick Select Tabs — Quickly cha

Page 4

FRAX 150Sweep Frequency Response AnalyzerConsiderations When Performing SFRA MeasurementsSFRA measurements are compared over time or between differen

Page 5

OPTIONAL ACCESSORIESThe FRAX Demo box FDB 101 is a transformer kit that can be used for in-house training and demonstrations. The small transformer is

Page 6 - ORDERING INFORMATION

FRAX 150Sweep Frequency Response AnalyzerUK Archcliffe Road, DoverCT17 9EN England T +44 (0) 1 304 502101 F +44 (0) 1 304 [email protected]

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Atec Megger-frax150 User Manual

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