When the rotor winding inter turn short circuit occurs, the rotor current is increased, the winding temperature rise, but also limits the reactive power of the generator, can also cause serious increase of unit vibration caused by rotor loss and even forced to shut down.
The device according to the above problems, through the micro detection coil mounted on the stator slot in the continuous monitoring of the air gap flux density waveform generator, according to the change of air gap flux density waveform, to judge the analysis of generator rotor winding inter turn insulation condition of hydro generator excitation circuit is applicable to all kinds of capacity (rotor) measurement, positioning and alarm interturn short-circuit.
Ø Power input：The working power supply can be AC and DC common, and has strong adaptability to the power supply;
Ø Real-time calculation：The high performance CPU processor guarantees real-time computation of all relays for each sampling point.
Ø Precise measurement and location：Device for continuous acquisition of waveform signal generator air gap magnetic field induced in the detector coil in micro processing, determine whether the severity of fault and short-circuit turn, and through the phase signal to determine the position of the short circuit;
Ø LCD：Real time display device, sampling, setting, reporting, waveform and so on;
Ø Message logging：Record event message, including action information and action waveform;
Ø Parameter setting：For local settings to limit short circuit parameters, cancel the traditional buttons, the touch screen input operation more intuitive and convenient;
Ø External communication：Provide RS485 communication connection, remote communication device current state and action information;
Ø Alarm output：A separate device for power loss alarm, two turn to turn short circuit alarm, each alarm signal is provided 2 way node;
Ø Indicator light：May indicate the current power status, device operation state, alarm status and so on;
Ø Self-test function：The device has self inspection and troubleshooting, self recovery function;
Ø Print function：Provides a serial port for connecting printers;
Ø Installation method：The utility model has the advantages of small size and beautiful appearance, and the opening hole is installed;
Ø Other：The device shall be fitted with a miniature measuring coil.
Ø Working storage temperature：-25～+65℃；
Ø Ambient humidity：≤ 95%，Gel free。
Ø Power input：AC/DC220V（50/60Hz）；
Ø Power waste：Not greater than30W；
Ø Over limit setting range：1～99%；
Ø measurement error：not exceeding ±5%；
Ø Position measurement error：No more than 1 pairs of magnetic poles；
Ø Display range：Frequency 0-100Hz, minimum amplitude ratio 0-100%;
Ø Alarm contact： 5A30VDC，5A250VAC；
Ø Other：For special requirements, please specify when ordering.