Generator Winding Short Circuit Test Instrument

Introduction:

   The Winding Impulse Voltage Tester (also known as a digital programmable winding tester) efficiently and non-destructively performs electrical tests on components with wound coils. Its principle involves applying the same pulse voltage to both a standard winding and the test winding, comparing their transient waveforms to assess the quality of the test winding. The transient waveform, which represents the decaying oscillations within the coil, allows for the simultaneous determination of the inductance, quality factor, the difference in the number of turns, and the inter-turn short-circuit conditions of the winding. In the presence of an iron core, it can also distinguish material differences. Under high-voltage pulse application, the occurrence of corona discharge can be used to judge poor insulation. In summary, all elements indicating the quality of the winding can be checked in a very short time.

This instrument uses microcomputer technology to quantify and process various parameters of waveforms, displaying and analyzing them through intuitive waveforms and data. It operates simply, provides accurate judgments, and has a high level of automation.

Key Technical Indicators:

Pulse Peak Voltage Range 100 V～10000VAny Setting (Stepless)100V）

Pulse Peak Voltage Accuracy ±5%

Trigger Mechanism Manual and Remote Control

Detection and Judgment Mode Area difference; Difference in area

Repeatability Accuracy ±1%

Storage Waveform Capacity 63Group

Sound Method Unqualified sound; Qualified sound; Mute

Sampling Frequency 612kHz～10MHz

Overall Power Consumption 25W

Voltage Settings Programmable

Low Inductance Measurement 300µH

Complete Machine Working Principle

The Zha Jian Impact Pressure Tester is based on a microcomputer, which controls a high-voltage pulse generator to apply a short-duration high-voltage pulse to the coil; under the action of the pulse, the coil and the capacitor inside the instrument produce a free decay oscillation, and then this oscillation waveform isPLDControlled velocityA/DAfter collection and processing, the data is sent to a microcomputer where it undergoes calculations for parameters such as time, corona, and area. The processed results are stored in an electronic memory and displayed on an LCD screen in clear, easy-to-understand text, data, and graphics, ensuring the authenticity of waveform reproduction. Additionally, the system issues an alarm based on the user-defined criteria for qualified or不合格 items.

Methods for Winding Quality Inspection and Judgment

The Circulating Impulse Pressure Tester features two typical automatic check and judgment methods, which can be combined or used individually based on the actual conditions of the measured coil. Each judgment method allows for the arbitrary setting and modification of the upper limit for alarm thresholds, aiming to accurately and quickly assess the quality of different coils.

Waveform Area Difference Comparison (Abbreviated as "Area Difference")

Please provide the Chinese content that you would like to be translated into American English.Please provide the Chinese content to be translated..No Chinese content provided.Within the specified range, compare the waveform area of the standard coil and the measured coil. Determine the degree of difference in their areas. Essentially, it is the comparison of the extent to which the two waveforms differ.A-BThe area difference between the intervalsAbsolutely.No Chinese content provided.Please provide the Chinese content you would like translated into American English.A-BThe area within the range is divided; the criteria are expressed as a percentage.%The product is deemed qualified if the calculated results fall within the set range.

The size of the area within the range is generally proportional to the energy loss within the coil, thus allowing for the determination of the magnitude of energy loss. For instance, when a measured coil has inter-turn short circuits, the reflection is an increased loss of energy in the short-circuited section.

Comparison of Waveform Area with Defects (shortened to 'Waveform Defect Area')

At anyPlease provide the Chinese content to be translated..No Chinese content provided.Within the specified range, the area of the deviation in the waveform of the measured coil is compared with the area of the standard coil waveform. The calculation is performed.A-BArea difference within the rangeA-BStandard waveform area within the range is used to determine the degree of deviation. The criterion is expressed as a percentage.%The setting is made, and products within the calculated range are deemed qualified. The size of the waveform deviation area represents the total sum of the inductance value and the degree of energy loss. This method can be relatively...No content provided for translation..No Chinese content provided for translation.Inspect the inductance value and energy loss of the coil on-site.