This paper discuss analyses for testing of high voltage instrument transformers. In this paper it shows performed test and analyse from it. We will try to improve that analyse problems. Instrument transformers for high-voltage applications play a key role in energy supply. Acting as the link between the primary network and the metering or protection equipment connected to the secondary side, a safe and reliable operation without failures is essential in relation to this background, this paper discusses testing for instrument transformers. And also discuss about multi stage Impulse Voltage Generator.