ZGS-SZ60kV/200mA water internal cooling generator voltage tester DC voltage withstand test and DC leakage current test without external blowing or water two conditions. The advantages and disadvantages of each are compared as follows:
Do the test under blowing water
Advantages: General DC high voltage tester can be used for testing, lightweight equipment, simple operation, accurate reading and not affected by water quality.
Disadvantages: Due to the structure of the generator set, it is difficult to dry the water at the bottom. Therefore, it is very time-consuming, and the blowing time can even be more than a week. Extended overhaul downtime. If the blowing water is not thorough, it will not only bring measurement errors, but also cause arc in the coil during the test, there is a risk of damage to the winding.
Do the test with water running
Advantages: No need to blow water equipment, saving the time of blowing water.
Disadvantages: At present, AC test (or resonant change) is used in combination with silicon pile and capacitor, and an additional device is needed to compensate the polarization of the manifold pipe. The equipment is bulky, scattered and complicated to connect. The test results are affected by water quality, and the microammeter fluctuates greatly and the reading is difficult.

This special leakage current tester for water internal cooling generator is a new generation of liquid crystal display and intelligent special test instrument developed by our company according to the principle of "low voltage shielding" on the basis of previous generation products.
It uses a high-power DC high-voltage generator, replacing the traditional test transformer, high-voltage silicon pile, voltage regulator, rectifier capacitor and inductor, DC high-voltage voltage divider, voltage regulator, mA meter, μA meter and polarization potential compensation device and a series of single-component combination test tools, all integrated in a high-voltage (generation) unit and a control box. The number of single components of the complete set of test equipment is reduced, the weight of the test equipment is reduced, the work intensity of the test personnel is reduced, the test wiring is simplified, and the test is more convenient, efficient and reliable.
At the same time, it has electronic voltage regulation, automatic polarization compensation and rich protection functions, so that the test operation is easier and safer; The use of medium frequency voltage doubling makes the test voltage more suitable, the test data more accurate, stable, and the results more reliable.
1. The use of intermediate frequency voltage doubling loop, the application of PWM pulse width modulation technology and high-power IGBT devices, and according to the electromagnetic compatibility theory, the use of special shielding, isolation and grounding measures, so that the instrument to achieve high quality, portable, and can withstand rated voltage discharge without damage.
2. Using voltage feedback, the voltage stability is greatly improved. At the same time, the inverter frequency is increased, and the volume and weight of the instrument and the pressure doubling cylinder are reduced. More portable.