Select [Test]-[Close], there is a real-time status display of 12 fractures below the LCD screen of the high-voltage switch dynamic characteristic tester. The screen shows that under this interface, you can check whether the fracture channel of the instrument is in good condition. If the fracture input is floating, it should display “Open”, and if it is short-circuited to ground, it should display “Close”. Therefore, short-circuit each fracture to the ground and observe the status display to determine whether the fracture time channel of the Circuit Breaker Tester is normal.
HV Hipot GDKC series Circuit Breaker Tester
HV Hipot will answer for you that the high-voltage switch also has the rigid split (close) speed defined by the manufacturer, mainly in the following categories:
1. Take the average speed of the whole process for closing, and take the average speed of 6mm just after the opening;
2. Take the average speed of the whole process for closing, and take the average speed of the whole process for opening;
It is defined as the speed definition adding program function just before closing (just after openning), which can also facilitate speed testing according to specific vacuum switches. In addition, when the speed test of the vacuum switch is carried out, the average speed of the whole opening process is very low due to the function of the buffer mechanism during the opening process. It is generally defined that the average speed of the vacuum switch before the buffer mechanism takes effect during the opening process of the vacuum switch is the average speed of the whole process, that is, the average speed of the closing is taken as the whole process average, and the average speed of 6mm just after the opening is closer to the true value. Since the opening distance of 35KV vacuum switch is generally about S=22mm, the value 6 in all the above definitions for 10KV vacuum switch speed can be changed to 10 or 11.
It is defined as the on-site grounding just before the closing (just after the splitting), pay attention to the grounding wire first, and then connect the fracture wire to ensure the safety of the fracture channel.
During the field test, because there is often a high induced voltage between the fracture of the high-voltage switch (especially above 220kV) and the ground, this voltage is large in magnitude and small in energy, but it is enough to threaten the safety of the high-voltage switch dynamic characteristic tester itself. . Inside the instrument, a relief circuit is connected between the signal input terminal of the fracture and the ground. The ground wire is first, and the relief circuit is actually connected first. At this time, when the signal line of the fracture is connected, even if a high voltage is induced by the fracture, it can be discharged to the ground through the relief circuit, thereby ensuring the Circuit Breaker Tester. Fracture channel safety.
Post time: Apr-12-2022