Basler Electric BE1-51 - Manual (Page 48)

42 9137200997 Rev G
Step 19. Remove input current and (if present) reset the relay front panel targets.
Step 20. On the appropriate time overcurrent curve chart (in the Time Overcurrent Characteristic Curves
chapter), locate the line representing 5 times the tap value (from Step 5) where it intersects the
particular curve representing the front panel TIME DIAL (NEUTRAL) setting of 20 (from Step
14). The resulting time delay value in seconds should be within
±5% of the timer reading [from
step 18(2)].
Note
Due to delays inherent in the test equipment, the time delay may
appear to exceed these limits. This concludes the timed output test.
Relays having instantaneous overcurrent option 1-1 or 1-2 only
proceed to the Instantaneous Overcurrent Pickup Test
Instantaneous Overcurrent Pickup Test
This test checks the minimum overcurrent pickup points for Instantaneous 1 and (if present)
Instantaneous 2 outputs.
Note
For relays having three-phase sensing (Sensing Input Types G or V),
only a single input phase is connected since this is sufficient for a
complete test of the instantaneous overcurrent sensing and output.
For relays that include neutral sensing (Sensing Input Types H, I, V, or
X), this test includes reconnecting the test output to the neutral
sensing terminals for testing the instantaneous 1 output during neutral
sensing.
Step 1. Perform the preliminary instructions.
Step 2. Reconnect the test setup to the INST 1 output terminals 2 and 10 as shown in Figures 24
through 27. Note that the timer may be removed from the test setup at this time.
Step 3. Set the TAP selector to A.
Step 4. Turn the front panel INST 1 control fully CCW to establish a pickup point of 1 times the TAP
selector A setting.
Step 5. Slowly adjust the test set, increasing the overcurrent threshold toward the value of the front
panel TAP selector A setting until the Instantaneous 1 output relay energizes.
RESULT: If target Type A or B is present:
(a) The front panel FUNCTION-INST 1 target (if present) will trip.
(b) The appropriate front panel ELEMENT target A, B, or C (if present) will trip.
Step 6. Remove input current. Record the test set current setting.
RESULT: The recorded value should be equal to or less than the front panel TAP selector A
setting for the minimum overcurrent pickup point for the instantaneous 1 overcurrent element.
Step 7. Reset the relay front panel targets (if present).
Step 8. Turn the front panel INST 1 control fully CW to establish a pickup point of 40 times the front
panel TAP selector A setting.
Step 9. Adjust the test set to approximately 35 times the front panel TAP selector A setting.
Tests and Adjustments BE1-51