The series resonance under UHV power can help many power workers conduct various power tests more conveniently.
Phenomenon:
The tuning curve is a straight line, and the instrument indicates no resonance point after tuning
reason:
Poor grounding of the circuit, incorrect wiring of the testing circuit, and open circuit of the instrument and equipment
Elimination method:
1) Check if the grounding device is reliable and if the grounding connection wire is disconnected;
2) Check the on/off status of the high and low voltage coils of the excitation transformer; (Low voltage winding resistance; high voltage winding resistance at each output end vs high voltage tail)
3) Check the continuity of each reactor; (Resistance of each winding)
4) Check the continuity of the voltage divider signal line; (High and low voltage capacity)
5) Check the continuity of the high and low voltage capacitor arms of the voltage divider; (Core 1 hole, shell 2 holes; 1 hole is disconnected from 2 holes)
6) The device itself does not have a resonance point for boosting, and it is necessary to check the continuity of the compensation capacitor;
If all components are normal and there are still no resonance points, please contact the after-sales company and do not disassemble the instrument by yourself!
