How to conduct AC test with microcomputer relay protection tester? As a high-voltage electrical equipment frequently used by electric power workers, the microcomputer relay protection tester has many characteristics such as fast test speed, high precision, and powerful functions. It has always been a handy device that electric power workers like to use, especially when using the microcomputer relay protection tester for AC tests. So this article takes YTC1000microcomputer relay protection tester as an example to briefly explain how to conduct AC tests with the microcomputer relay protection tester.
“AC Test” module is a general-purpose, comprehensive test module. It has independent 4-phase voltage and 3-phase current test units, independent 6-phase voltage, independent 6-phase current test units, and even a unique 12-phase simultaneous output unit, as well as sequence component output test units. Through the interface, the 3P, 6U, 6I, 12P, and sequence component buttons can be switched mutually. These independent units can call each other, fully meeting the AC test requirements under various conditions of the power system.
Their common point is: by setting the corresponding voltage or current as a variable, assigning a certain change step to the variable, and selecting an appropriate test mode (there are three test modes: “Manual”, “Semi-automatic”, and “Fully automatic”), it is convenient to test the action value, return value, action time, and return time of various voltage and current protections, and automatically calculate the return coefficient. Since the most commonly used unit is the “four-phase voltage and three-phase current” unit, and the others are basically the same in usage, only the “four-phase voltage and three-phase current” is taken as an example for detailed introduction below.
It can flexibly control the output of 4-phase voltage and 3-phase current, 6-phase voltage, 6-phase current, and 12-phase simultaneous output in multiple combinations
It has the function of sequence component output, directly setting the sequence component values, automatically combining the output of each phase voltage and current, and performing variable output according to the sequence components
The amplitude and phase of each phase voltage and current output can be arbitrarily set, and the amplitude can be set with an upper limit
The amplitude, phase, and frequency of each quantity can be set to change, and the change step can be arbitrarily set
Ux can be set to multiple output mode combinations, and can also be arbitrarily set to a value
It can be fully automatic, semi-automatic, or manual change, and can be switched arbitrarily during output
In the output state, the amplitude, phase, step, and the number of variables can be directly modified
It can directly display power values for calibrating power metering instruments
It can measure action value, return value, action time, and return time
The methods of conducting AC tests withmicrocomputer relay protection testers produced by different manufacturers are similar. In actual work, electric power workers need to first read the product instructions carefully and conduct tests strictly according to the manual, so as to achieve the test accuracy that the instrument should have.
