Zhongshi Electronic Power Co., Ltd., which has been at the forefront of test instrument design since it's foundation in the year of 1988.

Since then, we have became a leading manufacturer and servicer in the field of test equipment and technical development in China. For decades, we hold an principle that "We have the responsibility cause we have the ability to handle it". Zhongshi always offering our customers the best and most valuable electronic test equipment, serving the people all around the China cause we are the bellwether in this field.

For more than 20 years, Zhongshi has produced thousands of economically designed test equipments which are all leading the product level of China.

In 1993, we offered a test transformer CQSB-J-30/150 to Hubei Zixin Water Conservancy and Hydropower Co., Ltd. After 13 years, it returned to Zhongshi and took examination. We found that except for aging of the rubber insulating circles, all the function were working perfectly. The customers are still using this transformer after we change the rubber insulating circles. According to the feedback of them, it is still working in a stable and excellent condition.