Surface Potential Tester for Generators

Summary

Routine preventive tests often find it challenging to detect defects in the insulation of the cold end windings of steam turbines. The DC voltage surface potential method test effectively identifies insulation defects at the stator winding ends. Inter-phase short circuit faults at the stator ends can lead to significant economic losses, for which the Ministry of Power and the Ministry of Machinery have issued safety and technology directives.1994）86The document specifies that the insulation measurement test of the generator end terminal hand package is one of the important test items for generators.EDBM-30Generator Surface Potential TesterIt's completely satisfying.86High-tech product embodying the spirit of the No. document, its deployment,No Chinese content provided for translation..Dirt has enhanced the efficiency of generator maintenance.

Alias: Potentiometer, Generator Potential Difference MeterEDBM-30Generator Surface Potential TesterGenerator Phase Shift Test Instrument, Generator Stator Hand Packaging Insulation Tester, Generator Surface Potential Measurement Rod, Generator Stator Coil Terminal Surface Potential Measuring Instrument. Generator Stator Coil End Surface Potential Meters, Generator Potential Shift Detection Instruments, Generator Hand Insulation Measurement Rods，The Generator Stator Coil End Surface Potential Measuring Instrument is an insulation testing method that utilizes the surface potential method (also known as the potential displacement method) to detect insulation defects in generator stator bars. It checks the compactness and relative insulation strength of the hand-packed insulation at the stator ends. It compensates for the shortcomings of the generator stator winding AC and DC withstand tests, which cannot detect end insulation defects. It can identify defects such as poor insulation of lead wires, coil nose insulation wrapping defects, insufficient filling of insulating boxes, poor curing of binding涤玻rope, and poor welding quality of the stator hollow copper wires at the end joints. The Generator Stator Coil End Surface Potential Measurement is a new test item, where the coil ends play a supervisory role, further enhancing the reliability of safe generator operation.

Technical specifications: 1Input Resistance100M

           2Test Voltage:DC0-30KV

           3Voltage Accuracy:1.0%

Cautionary Notes:
    1When wrapping the end with foil, it must be tightly wrapped; otherwise, the foil and insulation may not seal properly.The surface will form a capacitor.The discharge current will be relatively high upon contact of the measuring rod.,Resulting in incorrect assessment.
    2During the end packaging, it is divided into the wire rod side and the drain pipe side, with an interval greater than...3CentimetersIt's easier to identify which side the issue is on when the potential is high; the key points are actually the root and cone sections, as the middle section doesn't hold much significance for measurement.
    3The microammeter with a serially connected measuring rod is a great digital microammeter, as it's easy to read and can also protect the meter from excessive current.
    4The terminal connector, located at the bottom of the housing and not easily measurable, should be pre-connected with wires.
    5It is crucial to correctly note the abnormal slot numbers to avoid mistaking one for another. Remember, remember that!
    6The generator must undergo testing without water, necessitating a thorough blowing out of the stator cooling water first.