22930 pages

2293
Automatic Transformer Winding Analyzer

In addition, the demagnetisation function eliminates the
magnetic remanence in the core after the application of
DC voltage, impulse tests or flash over. Magnetic
remanence can cause faulty measurements, high inrush
currents and incorrect operation of protective relays.
Personnel safety is guaranteed by an emergency button
as well as a state-of-the-art active discharge circuit and
a “Caution” indicator that continue to operate even
without line power.

FEATURES AND BENEFITS

Multipurpose winding analyzer: transformer winding
resistance, turns ratio, demagnetisation, type detection
and heat run test (cooling curve) in one instrument.

Setup made easy – simple one-time-connection system:
once connected will test all phases and windings.

Easy operation on touch screen interface with full
graphical test visualization.

Unique simultaneous winding magnetisation method
for winding resistance measurements, equivalent to
traditional equipment with up to 100 A test current.

Advanced procedure for turns ratio and phase
displacement measurement.

Demagnetisation function - transformer is returned to a
demagnetized status after measurement.

Tap changer control signal.

A simple one-time-connect-all system drastically
reduces measuring time: once connected all tests can
be done in a row without any reconnection.

Data transfer over USB memory-stick or LAN

The built-in simultaneous winding magnetization
method (patent pending) guarantees fast and reliable
resistance measurements. Stable measurements are
reached – even on large power transformers with delta
windings on the low voltage side.

APPLICATIONS

A progressive method for measuring transformer turns
ratio guarantees results closer to the nominal ratio even
in large power transformers with tertiary windings.

Power transformers

Distribution transformers

All type of HV windings

The 2293 is an automatic winding analyzer, optimized
for three phase power and distribution transformer
measurements.
It uniquely combines winding resistance measurement,
turns ratio measurement, core demagnetisation,
transformer type detection and heat run test (cooling
curve) in the fastest one instrument solution on the
market.

The 2293 is a valuable tool for factory test, acceptance test
and regular maintenance on:

a brand of
Haefely is a subsidiary
of Hubbell Incorporated.
Haefely has a policy of continuous product improvement. Therefore we reserve the right to change design and specification without notice.

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