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UltraLow Frequency Dielectric Strength Test is the alternative way for power frequency voltage withstand test. as we know , it is needed huge capacity testing transformer or a resonant transformer for power frequency voltage withstand test to large generator ,cables etc due to larger electrical capacity of insulating layer . The hugeequipment not only bulky but also expensive and not suitable for use. The electricity sector makes some test to solve the problems. according to theory and test result from domestic and overseas , 0.1Hz ultralow frequency voltage withstand test can solve this problems and the advantage is not only got same test results but also the instrument dimensions is small and considerably reduced the weight of it . 

Heibei Huanhai Import & Export Trading Co.,Ltd was established in year of 2014. It is specialized in manufacturing transformer oil tester, hipot tester ,protection relay testers and other testing equipments. The company has many foreign trade sales consultants with 10 years of experience , providing customers with the best service solutions and products. Our products with ISO 9001 and CE certified are exported to many countries and regions all over the world. The company is in the same group as Huazheng electric.

We insist on customer orientation and provide you with high quality products, reasonable prices, timely delivery and efficient service. We are willing to work with global clients for joint development and create value and success for our customers continuously.

From the date of purchase within one year instrument,the warranty time is 12 months.This is the piriod of free repair replacement, lifetime supply of maintenance and technical services. If the instrument has been found anomalies or malfunctions please contact us to arrange the most convenient treatment options.

We have our own manufacturing factory,pls see the below certificate,we are the direct supplier.

We are a new enterprise engaged in development,produce & sale a serious of power system products, such as Cable fault tester,  transformer test class, lightning arrester test class, comprehensive test class. 

Transformer Oil Testing     Transformer Testing       Circuit Breaker Testing     High Voltage Testing