100kV Partial Discharge Free AC Hipot Test System

The 100kV Partial Discharge Free AC Hipot Test System is a professional high-voltage testing solution developed for AC withstand voltage tests and partial discharge detection of transformers, switchgear, insulators, cables, bushings, GIS equipment, and other electrical apparatus.

The system adopts an SF6 gas-insulated test transformer instead of a traditional oil-immersed structure, eliminating the risk of oil contamination while significantly reducing equipment weight by 20% to 60%.This transformer boasts superior insulation and ultra-low partial discharge, hitting a PD level ≤3pC. The full system keeps total partial discharge no higher than 5pC when running at rated voltage.

This complete integrated test system is assembled with high voltage test transformer, coupling capacitor, high voltage current limiting reactor, low voltage compensation reactor, isolation transformer, automatic operation console as well as compensation cabinet. Its built-in low voltage compensation structure can effectively lower input current consumption by a maximum of 60%, which helps lift energy efficiency and cut daily operation expenses.

Equipped with a 7-inch color touchscreen control console, the system supports both automatic and manual testing modes. Users can independently configure up to five voltage stages, voltage ramp rates, and withstand test durations. Automatic testing functions include voltage ramping, compensation switching, timing, voltage reduction, data storage, and report printing, greatly improving testing efficiency and repeatability.

Designed for high-voltage laboratories and field testing applications, the system provides stable sinusoidal output with waveform distortion less than 5%, low operating noise, and reliable protection against overvoltage and overcurrent conditions. The scalable design allows similar systems within the product series to achieve voltage ratings up to 1200kV for ultra-high-voltage testing applications.

Product Guide

How the System Works

The 100kV Partial Discharge Free AC Hipot Test System generates a stable high-voltage power frequency output through the SF6 insulated test transformer. During testing, the coupling capacitor and measurement circuit continuously monitor partial discharge activity while the automatic control system manages voltage ramping, holding, and reduction processes.

The low-voltage compensation reactor works to cut down the required input current, which brings better energy efficiency and relieves the load burden of the connected power supply. The whole system is capable of carrying out withstand voltage testing and partial discharge measurement simultaneously, so users can conduct thorough evaluation on the insulation performance of all kinds of high-voltage equipment.

Features

1、SF6 gas-insulated transformer design without oil contamination

2、Overall partial discharge level ≤5pC

3、Transformer partial discharge level ≤3pC

4、Rated output voltage up to 100kV

5、Reactive power compensation reduces source current by up to 60%

6、Automatic and manual testing modes

7、Five-stage programmable voltage and timing settings

8、Adjustable voltage ramp rate from 0.5kV/s to 2.5kV/s

9、Automatic compensation switching and voltage regulation

10、Historical data storage and printing functions

11、High-precision voltage measurement

12、Stable sine-wave output with distortion ≤5%

13、Low-noise operation ≤65dB

14、Comprehensive overvoltage and overcurrent protection

15、Suitable for partial discharge and AC withstand voltage testing

Application Fields

1、Power Utility Companies

Used for routine insulation testing and partial discharge evaluation of transformers, switchgear, GIS equipment, cables, and substation apparatus.

2、High Voltage Laboratories

Suitable for type testing, factory acceptance testing, and research projects requiring ultra-low partial discharge performance.

3、Transformer Manufacturers

Used for quality control, insulation verification, and final factory testing of power and distribution transformers.

4、Universities and Research Institutes

Supports high-voltage engineering education, insulation research, and advanced electrical testing projects.

5、Industrial and Mining Enterprises

Provides preventive maintenance testing and insulation condition assessment for critical electrical equipment. 

Typical Test Items

1、Transformer AC Withstand Voltage Testing

2、GIS Partial Discharge Testing

3、High Voltage Switchgear Testing

4、Power Cable Insulation Testing

5、Insulator and Bushing Testing

6、Electrical Equipment Factory Acceptance Testing

7、High Voltage Laboratory Research

8、Preventive Maintenance Programs  

Weshine Advantages

Weshine Electric focuses on developing and manufacturing high-voltage testing gear as well as partial discharge measurement systems. Our AC withstand voltage test units with SF6 gas insulation feature extremely low partial discharge output, smart automatic operation, power-saving compensation technology, and dependable safety protection modules. Built to handle rigorous testing tasks both in labs and on-site work environments, all solutions from Weshine assist clients in carrying out precise insulation performance checks, meeting relevant industry standards, and maintaining stable long-term operation of their high-voltage equipment.

Our 100kV Partial Discharge Free AC Hipot Test System can fully satisfy all your high-voltage insulation testing and partial discharge monitoring demands. Feel free to reach out to our team anytime for customized solutions, detailed technical data and competitive quotations.

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