DC Hipot tester for water cooled generator

I. Brief
For the generator, DC tests can be a sensitive and effective discovery of stator end winding and gap defect defect.
It is a widespread method of generator winding insulation test. Due to the large internal water cooling generator
water manifold of conduction current is large, and according to the water quality of different, generally in the test
voltage current of 20 ~ 150mA range, if high voltage DC generator without sufficient capacity, will not be able to boost.
ZGF series water cooling generator for leakage current tester is dedicated to the generator, especially for generator
internal cooling water leakage current and DC high voltage test and research. It is especially designed the compensation
loop interference current, test can be completely ruled out stray current and sink pipe polarization potential interference to
the leakage current, accurate measurement of internal water cooling generator winding.

II. Advantage
● Using mid- frequency multi-voltage circuit, firstly apply PWM pulse width modulation technology and high power IGBT device,
according to electromagnetic compatibility theory, using a special shielding, isolating and earthing measurment, so that the
instrument can realize high-quality, portable, and withstand voltage discharge without damage.
● Using voltage feedback, so that voltage stability is greatly improved. At the same time, improve inverter frequency to make the
instrument and multi-voltage tube smaller and lighter, it is very convenient for carrying.
● Data display with LCD 320 × 240 dot matrix screen.
● Timer is used
● Adopt high quality components made in American, Japan and international chassis case was manufactured in Germany,
it has the characters of strong anti-interference ability, beautiful and practical.
● Multi-voltage tube is used by German technology, intermediate frequency transformer is specially designed, so it has
small volume and large capacity.
● With special design, it can greatly increase the output current and power, to meet the requirements of large capacity load

III. Condition
1、Power supply：AC 380V（±10%）three phase & four wires,50/60Hz
2、Working condition:-15℃～50℃
3、Relativity humidity:≤ 90%（No condensation, 25℃）
4、Altitude: ≤ 2000m

IV. Main Technical parameters
1、Rated output voltage:60kV
2、Rated output current:200mA
3、Rated output power:12 kW
4、Insulation resistance measurement：≤5%。
5、Voltage measurement error：1.0%（Scale±1digit）
6、Current measurement error:1.0%（Scale±1digit）
7、Over-voltage adjusting error: ≤1.0% (Software setting, setting value display on the LCD)
8、Ripple factor：≤1.0%
9、Adjusting ratio of power network: power voltage±10% ≤1.0%
10、Adjusting ratio of load：≤1.0%
11、Power voltage:380V±10%, 3 phases & 4wires
12、Working method:intermittent service, rated load 30 mins，1.1 times rated voltage:10mins（unload）
13、Weight of Control unit：25 kg
14、Multi-voltage weight：75 kg
15、Height of multi-voltage tube:≤800mm