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Power System Relay Protection Experimental Device


Jun 20, 2022

The timer and alarm recorder are set up to help teachers better manage studentsand facilitate teaching. The teacher can set a timed time, and the power supply canbe automatically disconnected at the timed time to ensure the correctness of the as-sessment time. It can also accumulate misoperations during the operation and givean alarm prompt, and record the number of misoperations to check the quality ofthe students'experiments. In addition, a password power-on function is also set upto limit students' private power-on operation. There is also a standard time displayon the panel. The teacher can adjust the time at will, and the time will not be lostwhen the cabinet is powered off.

The functions of the alarm include circuit leakage alarm, high-voltage powersupply overload alarm, and timing alarm. The number of times recorded and dis-played is the accumulation of the above three alarm times.


— Function 1 —

Password input: input the password (initial password: 123), the cabinetcan be turned on only when it is correct, otherwise it cannot be turnedon. Press the function key to make the panel display "1" on the far right,press the confirmation key to display three "ones" on the right, press thedigital key to flash the left digit, press the data key to add the number toadjust, then press the digital key to shift and flash, then press the datakey Adjust, repeat until the correct password, and then press the confirmbutton to confirm, the test bench is automatically powered on, and the

panel returns to the clock state.


— Function 2—

Timing setting: press the function key to make the rightmost bit "2", ifyou want to adjust the timing time, press the confirm key, press thedigital key to flash the low position, press the data key to adjust, andthen press the digital key to shift, and so on repeatedly. To the highestdigit, if it is incorrect, you can press the digital key repeatedly to shift,press the data key to adjust the data to the highest digit, and then press

the confirm key to confirm, the system returns to the clock state.


—Function 3 —

clock setting: the panel standard time can be modified; the standard timeis generally Beijing time, which can be adjusted according to the needs ofthe teacher; press the function key to make the rightmost display "3",press the confirm key to flash the low position, press the data key toadjust the data up , and then press the digital key to shift, and then pressthe data key to adjust, so repeatedly adjust to the highest position on theleft, if it is correct, press the confirm key to return to the clock state.


—Function 4 —

Timing check: Press the function key to display "4" on the far right, pressthe confirm key to check the time set by the timer, and then press the

confirm key to return to the clock state.


—Function 5—

Alarm check: check the number of alarms; press the function key tomake the rightmost display "5", press the confirm key to display twodigits on the right, the highest is "99", and then press the confirm key to

return to the clock state.


—Function 6

password modification: modify the system password; press the functionkey to make the rightmost display "6", press the confirm key, if you needto enter a new password, press the confirm key, at this time, the threedigits on the right display "o", press the high position of the digital keyFlashing, press the data key to adjust, then press the digital key to shiftand flash, repeat the operation until the rightmost position is confirmedby pressing the confirm key, and the system returns to the clock state.


—Function 7 —

Alarm reset: erase the alarm record; press the function key to display "7"on the far right, press the confirm key to erase the alarm record and

return to the clock state.


—Function 8—

Check the password: This function is to prevent the operator from for-getting the password; press the function key to display "8" on the farright, press the confirmation key to display the three-digit system pass-word on the right, and press the confirmation key to return to the clock

state.