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2293
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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. 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. 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 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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COMPLETE AUTOMATIC TEST PROCEDURE The 2293 performs turns ratio, resistance measurements and demagnetization on all windings without any reconnections. Once the cable set is connected to the test object, the instrument will automatically measure the turns ratio of all taps. Then - without reconnection - the winding resistance can be measured. Finally the demagnetization function will put the transformer in a demagnetized state. A complete transformer can be tested by a single person in a fraction of time compared to traditional instruments. TURNS RATIO The AC power-supply integrated in the...

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TECHNICAL SPECIFICATIONS Resistance Measurement Max. Measuring Current DC Max. Charging Voltage DC Range Resistance 0.1 μ ... 300 μ 300.1 μ … 30 k 30.01 k … 300 k 32 A (user selectable) 100 V 0.1 μ … 300 k Accuracy (1) 0.1% ± 0.5 μ 0.1% 1% Ratio measurement Max. Supply Current AC Max. Meas. Voltage AC Range Ratio 1.0 … 100 100 … 2’000 2’000 … 20’000 20’000 … 100’000 Phase (Ratio measurement) 1.0 … 500 500 … 10’000 Phase (Clock number detection) 1.0 … 500 Mains Power Supply 90 VAC … 264 VAC 1000 W 47 Hz … 63 Hz Voltage Maximum Power Frequency Environmental Operating temperature Storage...

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Tettex Instruments offers a complete portfolio for transformer testing TTR 2795 / TTR 2796 Transformer Turns Ratio Meter with 100/250 V test voltage Onsite testing of turns and voltage ratio, phase displacement and excitation current. Automatic winding connection identification and vector group detection. Remotely controllable via USB. FRA 5310 Frequency Response Analyser Detection of winding movements and mechanical failures of transformers. Active probing assures reliable and repetitive measurement results. Advanced analysis and touch screen operation. Recovery Voltage Meter Mobile system...

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2293 4Pages

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2293
4Pages