TheDC high-voltage generatorunder the UHV power company can help many power workers conduct various power tests more conveniently.

DC high voltage generatoris used to detect the insulation strength of DC precision power supply and converter station equipment and insulation materials under high DC voltage, the corona and ion current of DC power lines and their effects, as well as the leakage current testing equipment of AC and DC power supplies. In addition, it can also serve as a power source for other high-voltage testing equipment, such as impulse voltage generators, impulse current generators, oscillation circuits, etc. Micro ammeter is an important component of DC high voltage generator, used to detect leakage current in voltage testing.

When using a microampere meter for a DC high-voltage generator, the following precautions should be taken. The wiring of the microampere meter for a DC high-voltage generator is unreliable or not properly handled during testing, which can easily cause discharge from surrounding objects during the boosting process. In addition, improper discharge time and sequence may directly cause damage to the microampere meter.

Before using a DC high-voltage generator, it is necessary to carefully check whether there is sufficient safety distance between the high-voltage output line and other objects, and whether the high-voltage compression side of the test object has sufficient safety distance. After the test is completed, the tester must lower the voltage of the DC high-voltage generator to zero and turn on the obvious power cut-off point before using a discharge rod to discharge the test object. The entire discharge process is divided into two parts.

During discharge, the discharge rod should not immediately come into contact with the test object. The head of the discharge rod should gradually approach the test object. When silent, the discharge rod can be directly connected to the ground wire for discharge. The service life of the microampere meter for DC high-voltage generators is directly related to the operation method of the tester. The quality of wiring and the duration of discharge are directly related to the lifespan of a micro ammeter.

Specification and configuration of microampere meter for DC high-voltage generator:

In routine testing, the DC leakage test of lightning arresters is conducted at a current of 1 mA and a reference voltage of 75%, with a maximum current value of 1000 ua. In routine testing, the DC leakage test current value of the cable is relatively small. The microampere meter of a DC high-voltage generator usually uses a three and a half digit LCD display (range: 0-1999ua), so the range is sufficient for daily DC leakage testing projects.

A larger range microampere meter is only needed when using high-capacity cables frequently. Due to the high charging current when the cable is pressurized, it is recommended to choose a 4.5-inch LCD microampere meter (range: 0-19999ua or 0-1999.9ua).