High voltage test, impulse voltage generator , impulse current generator, power frequency test with standard, DC generator , transformer test lab. BHT is a famous high voltage test facility supplier in Beijing China. Beijing Huatian Mechanical-Electrical Institute Co., Ltd. (BHT) is a company subordinated to China Aerospace Science and Industry Corporation (CASIC) and a high and new technology enterprise, which is dedicated to the research, design and manufacturing of test and detection equipment in high-voltage industry.