5-4
BE1-46N Testing
t
K
(I
2
pu)
2
10
(0.25)
2
160
Step 3. Close switch A to apply current to relay and initiate timer.
Step 4. Observe timer reading after PICKUP LED lights.
RESULT:
Timer should indicate 100 ±5 seconds.
Step 5. To calculate the time required for the timing function, use the following formula:
We find t = 160 seconds. But, because the MAX TIME was set for 10 (100 seconds), trip occurred at 100
seconds.
This concludes the operational test. To test all three phase inputs, repeat the test procedures applying the
single-phase current source input to phase B inputs and then phase C inputs.
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