Basler Electric BE1-51/27C - Manual (Page 53)

9137200998 Rev E 47
RESULT: The recorded value should be within
±5% of the front panel TAP (NEUTRAL)
selector A setting for the neutral minimum overcurrent pickup point for the time overcurrent.
Step 19. Set the front panel TAP (NEUTRAL) selector to J.
Step 20. Slowly adjust the test set, increasing the overcurrent threshold toward the value of the front
panel TAP (NEUTRAL) selector J setting until the front panel TIMING (NEUTRAL) indicator
just illuminates. Do not disturb this setting.
Step 21. Record the current reading and remove input current.
RESULT: The recorded value should be within
±5% of the front panel TAP (NEUTRAL)
selector J setting for the neutral maximum overcurrent pickup point for the time overcurrent
element.
Timed Output Test
This test checks the accuracy of the time overcurrent characteristic delay.
Note
For relays having three-phase sensing (Sensing Input Type A or P)
only a single input phase needs to be connected, since this is
sufficient for a complete test of the Time Delay. For relays that include
neutral sensing (Sensing Input Type D, T, or J), this test includes
reconnecting the Test Output to the Neutral Sensing terminals for
testing the Timed Output during neutral sensing.
Step 1. Verify that the preliminary instructions have been performed.
Step 2. (Timing type Z1, Z2, or Z3 only.) Select the desired time current characteristic curve.
Step 3. Set the front panel TAP selector to B.
Step 4. Adjust the front panel TIME DIAL to 20.
Step 5. Adjust the test set for an overcurrent threshold of precisely 5 times the front panel TAP selector
B setting.
Step 6. Apply input current to the relay and initiate the test setup timer.
Step 7. Observe that the appropriate front panel TIMING indicator illuminates and when the time delay
ends that the timed output relay is energized.
RESULTS: (1) The appropriate front panel TIMING indicator extinguishes.
(2) The test setup timer stops. (Record count for use in Step 9.)
(3) If target type A or B is present:
(a) The front panel FUNCTION-TIME target (if present) trips.
(b) The appropriate front panel ELEMENT target A, B, or C (if present)
trips.
Step 8. Remove input current and (if present) reset the relay front panel targets.
Note
Due to delays inherent in the test equipment, the time delay for the
following test may appear to exceed these limits.
BE1-51/27C Tests and Adjustments