The 2293 is an automatic winding analyser, optimized for three phase power and distribution transformer measurements.
It uniquely combines winding resistance measurement, turns ratio, dynamic resistance measurement, core demagnetisation, transformer type detection, magnetic balance, short circuit impedance and heat run test (temperature rise and cooling curve) in the fastest single instrument solution on the market.
A simple “one-time-connection” system drastically reduces measuring time: once connected all tests can be performed in a row without any reconnection.
The built-in simultaneous winding magnetization method guarantees fast and reliable resistance measurements. Stable measurements are reached even on large power transformers with delta windings on the low voltage side.
A progressive method for measuring transformer turns ratio guarantees results closer to the nominal ratio even in large power transformers with tertiary windings.
Dynamic resistance measurement on tap changer perform an efficient and reliable check of the transformer tap changer.
The demagnetisation function eliminates the magnetic remanence, which can cause faulty measurements, high inrush currents and incorrect operation of protective relays.
Short circuit impedance test at reduced current helps locating mechanical damages.
In addition the magnetic balance test can detect faults in the transformer magnetic core.
Personnel safety is guaranteed by an emergency button as well as a state-of-the-art active discharge circuit and a “caution” indicator that continues to operate even without line power. An optional interlock connector can be ordered.