72A-2570-01 Rev. K 07/2011 1-1
1. Introduction
This chapter describes the SFRA instrument hardware and software and
introduces SFRA testing. It contains the following sections:
• “M5200, M5300, and M5400 SFRA Instruments” on page 1-1
• “Hardware Accessories” on page 1-3
• “Software” on page 1-4
• “PC Requirements” on page 1-4
M5200, M5300, and M5400 SFRA Instruments
Sweep Frequency Response Analysis (SFRA) testing is a nonintrusive way to
identify mechanical changes inside a transformer. Changes in the internal
configuration produce different frequency responses that indicate a range of
failure modes. Performed in the field, without teardown or draining of oil,
SFRA testing provides accurate and repeatable measurements.
The M5200, M5300, and M5400 Sweep Frequency Response Analyzers
measure and record the frequency-response characteristics of transformer
windings. Each unit consists of a robust molded shell housing a field
controller and instrumentation module, an excitation source, and a
measurement module. Table 1.1 describes the three SFRA instruments.
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