DFA100 Dielectric Fault Analyzer
The DFA100 Dielectric Fault Analyzer is a handheld, battery-powered
instrument for monitoring non-intrusive, in-service acoustic signals
produced by partial discharge and loose components. The DFA100 is
designed to detect faults in grounded SF6 gas-insulated systems, such as SF6-filled dead-tank circuit breakers. The DFA100 can also be applied to grounded oil-filled instrument transformers.
You can apply the DFA100 to any grounded component associated with the SF6-filled
apparatus under test. During acoustic emission measurement, the DFA100
processes the results and determines the fault. The instrument can
differentiate between PD, particles, and mechanical defects.
Features and Benefits
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Condition-Based Monitoring. Use for GIS, SF6-filled
dead-tank breakers, and instrument transformers, during commissioning
and in service. Identify and locate PD, particles, and mechanical
defects.
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Rapid Results. The DFA100 is
quick and easy to configure, producing results in seconds. Use the
results by themselves or in conjunction with other in-service test
results to assist decision making.
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Selectable Settings. The DFA100 provides recommended settings for testing both SF6-filled and oil-filled equipment.
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Simple, User-Friendly PC Interface. Use the simple interface to upload test results to a PC or download previous data and nameplate configurations.
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Rugged and Reliable.
The DFA100 has outstanding durability for field use and produces
high-quality results with high repeatability, allowing for rapid and
reliable decisions.
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Battery Operated. The DFA100 is a standalone, handheld instrument that can operate up to 4 hours on one charge.
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Wireless Synchronization. The DFA100 uses a wireless synchronization module for timing PD and mechanical activity against the power system frequency.
The DFA100 provides three measuring modes: continuous, phase, and pulse.
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Use Continuous mode to survey apparatus
and locate the primary source of the AE signal. Continuous mode
provides four scales of acoustic signal measurement: the RMS signal,
peak signal, degree of modulation with fundamental, and degree of
modulation with second harmonic.
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Use Phase mode
to correlate the acoustic signal and the fundamental power signal and
generate an amplitude vs. phase plot. This information is used to
determine the synchronizing nature of the acoustical discharges
relative to the fundamental power signal. The patterns obtained are
used to identify the nature of the source: PD, particles, and
mechanical defects.
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Use Pulse mode
primarily to monitor particles. Particles are dynamic and produce both
electrical discharges and mechanical impacts. This dynamic behavior is
best represented in Pulse mode, in which DFA100 displays the results in
an amplitude vs. elevation time plot. This information can be
interpreted to determine number, size, and severity of the active
particles.
DFA100 Viewer Software
The DFA100 comes with software that allows you to:
- Manage DFA100 results
- Plot and overlay results
- Upload and download data to the DFA100
- Generate detailed reports
 DFA100_Brochure_9-2007.pdf (250.44 kB)
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