The new DC high voltage generator provides DC high voltage source, which is specially used to detect the electrical insulation strength and leakage current of power devices. The intelligent DC high voltage generator is the latest research, design and manufacturing product of the new era according to the requirements of the Chinese industry standard ZBF 24003-90 general technical conditions for portable DC high voltage generator. The intelligent DC high voltage generator has a variety of protection functions, such as low voltage overcurrent, low voltage overvoltage, high voltage overcurrent, high voltage overvoltage, zero position protection, ungrounded protection, etc. Special sensors are used for fault sampling. The action time is nanosecond, and the optical isolation element is also nanosecond. The action time is generally 10 microseconds, which can completely shut off the DC main circuit, so as to protect the instrument from damage.