Electrical Test Instruments PI-6000
Section IV - Operating Instructions
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Copyright(C) 1994-2019 Electrical Test Instruments, LLC All Rights Reserved
Page IV-6
11.
Press RESET button.
12.
Set TIMEBASE to SECONDS.
13.
Select MAINTAIN mode.
14.
If desired, N.C. mode may be used; connect contacts leads to an unused
pole of the breaker.
15.
Press and release INITIATE key; OUTPUT ON light should glow, timer
should run, and current display should read desired output current.
16.
While test is running, observe current reading. If necessary, adjust to
correct value by using rheostat control.
17.
When breaker trips, the test set output should de-energize, timer should
stop, and OUTPUT ON light should turn off.
18.
Read and record trip current and trip time. Compare to manufacturer's
time/current curve.
19.
Repeat above tests for other poles of the breaker. Allow time for breaker to
cool. Note: it is acceptable if all poles of the breaker trip /- 15% of the
manufacturer's time range for the value of test current chosen. All poles of
the breaker need not trip in exactly the same amount of time.
20.
Shut down test set, disconnect breaker, and prepare for subsequent
testing or relocation according to steps 18 through 22 in pre-test
installation and setup outlined above.
Pick-Up of Instantaneous Element
1.
Consult manufacturer's literature to determine any necessary precautions
and expected test results. Check the breaker's instantaneous setting.
Pickup should occur at about that current.
2.
Follow steps 1 through 16 in pre-test installation and setup, as required, to
set up the breaker test set.
3.
Setup MAC-21 for C.L. MOM.
4.
Set MAC-21 RANGE to lowest range that is greater than desired test
current.
5.
Set TIMEBASE to CYCLES.
6.
Press PRESET key. Adjust preset time to 5.0 cycles. This value may be set
higher or lower, depending on trip characteristics of breaker.
7.
Press PRESET again to return to normal mode.
8.
Select MEMORY mode.
