During the use of the circuit breaker dynamic characteristic tester, electric workers will use some professional terms to describe the test results or test process. So, what does the test term mean when testing circuit breakers? The following article introduces it to you.

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During the test, the “opening (closing) time” refers to the period from when the opening (closing) coil is powered on as the timing starting point to when the dynamic and static contacts just open (close).

When testing the circuit breaker, what are the meanings of “same-phase synchronization” and “phase-to-phase synchronization” displayed on the instrument? These two terms both refer to the difference between the maximum value and the minimum value of the opening (closing) gate time, except that “same phase” refers to the difference in the same phase, while “phase-to-phase” refers to The difference among the three phases.

The “average speed” of the circuit breaker detected by the test personnel refers to: during the whole process of opening (closing) of the circuit breaker, the front and rear of the total stroke of the moving contact are subtracted by 10% respectively, and the middle 80% of the moving contact is used. The ratio of the stroke of the contact movement to the time is the “average speed” of the circuit breaker.

Using a tester to test the “maximum speed” of the circuit breaker mainly refers to: during the opening (closing) process of the circuit breaker, after the moving contact starts to move, take the movement of the moving contact every 10ms as a speed measurement unit until the moving The contact movement stops, and among the several speed unit values obtained, the larger unit speed value is the maximum speed of the opening (closing) switch.

In the process of testing circuit breakers, we will also encounter the term “just opening (closing) speed”, which depends on the manufacturer of the switch under test, and the type of switch manufactured is different. There are also different definitions.